/* * Clutter. * * An OpenGL based 'interactive canvas' library. * * Authored By Matthew Allum * * Copyright (C) 2006 OpenedHand * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:clutter-actor * @short_description: Base abstract class for all visual stage actors. * * #ClutterActor is a base abstract class for all visual elements on the * stage. Every object that must appear on the main #ClutterStage must also * be a #ClutterActor, either by using one of the classes provided by * Clutter, or by implementing a new #ClutterActor subclass. * * Every actor is a 2D surface positioned and optionally transformed * in 3D space. The actor is positioned relative to top left corner of * it parent with the childs origin being its anchor point (also top * left by default). * * The actors 2D surface is contained inside its bounding box, * described by the #ClutterActorBox structure: * *
* Bounding box of an Actor * *
* * The actor box represents the untransformed area occupied by an * actor. Each visible actor that has been put on a #ClutterStage also * has a transformed area, depending on the actual transformations * applied to it by the developer (scale, rotation). Tranforms will * also be applied to any child actors. Also applied to all actors by * the #ClutterStage is a perspective transformation. API is provided * for both tranformed and untransformed actor geometry information. * * The 'modelview' transform matrix for the actor is constructed from * the actor settings by the following order of operations: * * Translation by actor x, y coords, * Translation by actor depth (z), * Scaling by scale_x, scale_y, * Rotation around z axis, * Rotation around y axis, * Rotation around x axis, * Negative translation by anchor point x, * y, * Rectangular Clip is applied (this is not an operation on * the matrix as such, but it is done as part of the transform set * up). * * * An actor can either be explicitly sized and positioned, using the * various size and position accessors, like clutter_actor_set_x() or * clutter_actor_set_width(); or it can have a preferred width and * height, which then allows a layout manager to implicitly size and * position it by "allocating" an area for an actor. This allows for * actors to be manipulate in both a fixed or static parent container * (i.e. children of #ClutterGroup) and a more automatic or dynamic * layout based parent container. * * When accessing the position and size of an actor, the simple accessors * like clutter_actor_get_width() and clutter_actor_get_x() will return * a value depending on whether the actor has been explicitly sized and * positioned by the developer or implicitly by the layout manager. * * Depending on whether you are querying an actor or implementing a * layout manager, you should either use the simple accessors or use the * size negotiation API. * * Clutter actors are also able to receive input events and react to * them. Events are handled in the following ways: * * * Actors emit pointer events if set reactive, see * clutter_actor_set_reactive() * The stage is always reactive * Events are handled by connecting signal handlers to * the numerous event signal types. * Event handlers must return %TRUE if they handled * the event and wish to block the event emission chain, or %FALSE * if the emission chain must continue * Keyboard events are emitted if actor has focus, see * clutter_stage_set_key_focus() * Motion events (motion, enter, leave) are not emitted * if clutter_set_motion_events_enabled() is called with %FALSE. * See clutter_set_motion_events_enabled() documentation for more * information. * Once emitted, an event emission chain has two * phases: capture and bubble. An emitted event starts in the capture * phase (see ClutterActor::captured-event) beginning at the stage and * traversing every child actor until the event source actor is reached. * The emission then enters the bubble phase, traversing back up the * chain via parents until it reaches the stage. Any event handler can * abort this chain by returning %TRUE (meaning "event handled"). * * Pointer events will 'pass through' non reactive * overlapping actors. * * *
* Event flow in Clutter * *
* * Every '?' box in the diagram above is an entry point for application * code. * * For implementing a new custom actor class, please read the corresponding section * of the API reference. */ /** * CLUTTER_ACTOR_IS_MAPPED: * @a: a #ClutterActor * * Evaluates to %TRUE if the %CLUTTER_ACTOR_MAPPED flag is set. * * Means "the actor will be painted if the stage is mapped." * * %TRUE if the actor is visible; and all parents with possible exception * of the stage are visible; and an ancestor of the actor is a toplevel. * * Clutter auto-maintains the mapped flag whenever actors are * reparented or shown/hidden. * * Since: 0.2 */ /** * CLUTTER_ACTOR_IS_REALIZED: * @a: a #ClutterActor * * Evaluates to %TRUE if the %CLUTTER_ACTOR_REALIZED flag is set. * * Whether GL resources such as textures are allocated; * if an actor is mapped it must also be realized, but an actor * can be realized and unmapped (this is so hiding an actor temporarily * doesn't do an expensive unrealize/realize). * * To be realized an actor must be inside a stage, and all its parents * must be realized. The stage is required so the actor knows the * correct GL context and window system resources to use. * * Since: 0.2 */ /** * CLUTTER_ACTOR_IS_VISIBLE: * @a: a #ClutterActor * * Evaluates to %TRUE if the actor has been shown, %FALSE if it's hidden. * Equivalent to the ClutterActor::visible object property. * * Note that an actor is only painted onscreen if it's mapped, which * means it's visible, and all its parents are visible, and one of the * parents is a toplevel stage. * * Since: 0.2 */ /** * CLUTTER_ACTOR_IS_REACTIVE: * @a: a #ClutterActor * * Evaluates to %TRUE if the %CLUTTER_ACTOR_REACTIVE flag is set. * * Only reactive actors will receive event-related signals. * * Since: 0.6 */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "clutter-actor.h" #include "clutter-container.h" #include "clutter-main.h" #include "clutter-enum-types.h" #include "clutter-scriptable.h" #include "clutter-script.h" #include "clutter-marshal.h" #include "clutter-private.h" #include "clutter-debug.h" #include "clutter-units.h" #include "cogl/cogl.h" typedef struct _ShaderData ShaderData; typedef struct _AnchorCoord AnchorCoord; #define CLUTTER_ACTOR_GET_PRIVATE(obj) \ (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_ACTOR, ClutterActorPrivate)) /* Internal helper struct to represent a point that can be stored in either direct pixel coordinates or as a fraction of the actor's size. It is used for the anchor point, scale center and rotation centers. */ struct _AnchorCoord { gboolean is_fractional; union { /* Used when is_fractional == TRUE */ struct { gdouble x; gdouble y; } fraction; /* Use when is_fractional == FALSE */ ClutterVertex units; } v; }; /* Internal enum used to control mapped state update. This is a hint * which indicates when to do something other than just enforce * invariants. */ typedef enum { MAP_STATE_CHECK, /* just enforce invariants. */ MAP_STATE_MAKE_UNREALIZED, /* force unrealize, ignoring invariants, * used when about to unparent. */ MAP_STATE_MAKE_MAPPED, /* set mapped, error if invariants not met; * used to set mapped on toplevels. */ MAP_STATE_MAKE_UNMAPPED /* set unmapped, even if parent is mapped, * used just before unmapping parent. */ } MapStateChange; struct _ClutterActorPrivate { /* fixed_x, fixed_y, and the allocation box are all in parent * coordinates. */ gfloat fixed_x; gfloat fixed_y; /* request mode */ ClutterRequestMode request_mode; /* our cached request width is for this height */ gfloat request_width_for_height; gfloat request_min_width; gfloat request_natural_width; /* our cached request height is for this width */ gfloat request_height_for_width; gfloat request_min_height; gfloat request_natural_height; ClutterActorBox allocation; guint position_set : 1; guint min_width_set : 1; guint min_height_set : 1; guint natural_width_set : 1; guint natural_height_set : 1; /* cached request is invalid (implies allocation is too) */ guint needs_width_request : 1; /* cached request is invalid (implies allocation is too) */ guint needs_height_request : 1; /* cached allocation is invalid (request has changed, probably) */ guint needs_allocation : 1; guint queued_redraw : 1; guint show_on_set_parent : 1; guint has_clip : 1; guint clip_to_allocation : 1; guint enable_model_view_transform : 1; guint enable_paint_unmapped : 1; gfloat clip[4]; /* Rotation angles */ gdouble rxang; gdouble ryang; gdouble rzang; /* Rotation center: X axis */ AnchorCoord rx_center; /* Rotation center: Y axis */ AnchorCoord ry_center; /* Rotation center: Z axis */ AnchorCoord rz_center; /* Anchor point coordinates */ AnchorCoord anchor; /* depth */ gfloat z; guint8 opacity; ClutterActor *parent_actor; gchar *name; guint32 id; /* Unique ID */ gdouble scale_x; gdouble scale_y; AnchorCoord scale_center; ShaderData *shader_data; PangoContext *pango_context; ClutterActor *opacity_parent; }; enum { PROP_0, PROP_NAME, /* X, Y, WIDTH, HEIGHT are "do what I mean" properties; * when set they force a size request, when gotten they * get the allocation if the allocation is valid, and the * request otherwise */ PROP_X, PROP_Y, PROP_WIDTH, PROP_HEIGHT, /* Then the rest of these size-related properties are the "actual" * underlying properties set or gotten by X, Y, WIDTH, HEIGHT */ PROP_FIXED_X, PROP_FIXED_Y, PROP_FIXED_POSITION_SET, PROP_MIN_WIDTH, PROP_MIN_WIDTH_SET, PROP_MIN_HEIGHT, PROP_MIN_HEIGHT_SET, PROP_NATURAL_WIDTH, PROP_NATURAL_WIDTH_SET, PROP_NATURAL_HEIGHT, PROP_NATURAL_HEIGHT_SET, PROP_REQUEST_MODE, /* Allocation properties are read-only */ PROP_ALLOCATION, PROP_DEPTH, PROP_CLIP, PROP_HAS_CLIP, PROP_CLIP_TO_ALLOCATION, PROP_OPACITY, PROP_VISIBLE, PROP_MAPPED, PROP_REALIZED, PROP_REACTIVE, PROP_SCALE_X, PROP_SCALE_Y, PROP_SCALE_CENTER_X, PROP_SCALE_CENTER_Y, PROP_SCALE_GRAVITY, PROP_ROTATION_ANGLE_X, PROP_ROTATION_ANGLE_Y, PROP_ROTATION_ANGLE_Z, PROP_ROTATION_CENTER_X, PROP_ROTATION_CENTER_Y, PROP_ROTATION_CENTER_Z, /* This property only makes sense for the z rotation because the others would depend on the actor having a size along the z-axis */ PROP_ROTATION_CENTER_Z_GRAVITY, PROP_ANCHOR_X, PROP_ANCHOR_Y, PROP_ANCHOR_GRAVITY, PROP_SHOW_ON_SET_PARENT }; enum { SHOW, HIDE, DESTROY, PARENT_SET, KEY_FOCUS_IN, KEY_FOCUS_OUT, PAINT, PICK, REALIZE, UNREALIZE, QUEUE_REDRAW, EVENT, CAPTURED_EVENT, BUTTON_PRESS_EVENT, BUTTON_RELEASE_EVENT, SCROLL_EVENT, KEY_PRESS_EVENT, KEY_RELEASE_EVENT, MOTION_EVENT, ENTER_EVENT, LEAVE_EVENT, LAST_SIGNAL }; static guint actor_signals[LAST_SIGNAL] = { 0, }; static void clutter_scriptable_iface_init (ClutterScriptableIface *iface); static void _clutter_actor_apply_modelview_transform (ClutterActor *self); static void clutter_actor_shader_pre_paint (ClutterActor *actor, gboolean repeat); static void clutter_actor_shader_post_paint (ClutterActor *actor); static void destroy_shader_data (ClutterActor *self); /* These setters are all static for now, maybe they should be in the * public API, but they are perhaps obscure enough to leave only as * properties */ static void clutter_actor_set_min_width (ClutterActor *self, gfloat min_width); static void clutter_actor_set_min_height (ClutterActor *self, gfloat min_height); static void clutter_actor_set_natural_width (ClutterActor *self, gfloat natural_width); static void clutter_actor_set_natural_height (ClutterActor *self, gfloat natural_height); static void clutter_actor_set_min_width_set (ClutterActor *self, gboolean use_min_width); static void clutter_actor_set_min_height_set (ClutterActor *self, gboolean use_min_height); static void clutter_actor_set_natural_width_set (ClutterActor *self, gboolean use_natural_width); static void clutter_actor_set_natural_height_set (ClutterActor *self, gboolean use_natural_height); static void clutter_actor_set_request_mode (ClutterActor *self, ClutterRequestMode mode); static void clutter_actor_update_map_state (ClutterActor *self, MapStateChange change); static void clutter_actor_unrealize_not_hiding (ClutterActor *self); /* Helper routines for managing anchor coords */ static void clutter_anchor_coord_get_units (ClutterActor *self, const AnchorCoord *coord, gfloat *x, gfloat *y, gfloat *z); static void clutter_anchor_coord_set_units (AnchorCoord *coord, gfloat x, gfloat y, gfloat z); static ClutterGravity clutter_anchor_coord_get_gravity (AnchorCoord *coord); static void clutter_anchor_coord_set_gravity (AnchorCoord *coord, ClutterGravity gravity); static gboolean clutter_anchor_coord_is_zero (const AnchorCoord *coord); /* Helper macro which translates by the anchor coord, applies the given transformation and then translates back */ #define TRANSFORM_ABOUT_ANCHOR_COORD(actor,coord,transform) G_STMT_START { \ gfloat _tx, _ty, _tz; \ clutter_anchor_coord_get_units ((actor), (coord), &_tx, &_ty, &_tz); \ cogl_translate (_tx, _ty, _tz); \ { transform; } \ cogl_translate (-_tx, -_ty, -_tz); } G_STMT_END G_DEFINE_ABSTRACT_TYPE_WITH_CODE (ClutterActor, clutter_actor, G_TYPE_INITIALLY_UNOWNED, G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_SCRIPTABLE, clutter_scriptable_iface_init)); #ifdef CLUTTER_ENABLE_DEBUG /* XXX - this is for debugging only, remove once working (or leave * in only in some debug mode). Should leave it for a little while * until we're confident in the new map/realize/visible handling. */ static inline void clutter_actor_verify_map_state (ClutterActor *self) { ClutterActorPrivate *priv = self->priv; if (CLUTTER_ACTOR_IS_REALIZED (self)) { /* all bets are off during reparent when we're potentially realized, * but should not be according to invariants */ if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)) { if (priv->parent_actor == NULL) { if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { } else g_warning ("Realized non-toplevel actor should have a parent"); } else if (!CLUTTER_ACTOR_IS_REALIZED (priv->parent_actor)) { g_warning ("Realized actor %s[%p] has an unrealized parent %s[%p]", G_OBJECT_TYPE_NAME (self), self, G_OBJECT_TYPE_NAME (priv->parent_actor), priv->parent_actor); } } } if (CLUTTER_ACTOR_IS_MAPPED (self)) { if (!CLUTTER_ACTOR_IS_REALIZED (self)) g_warning ("Actor is mapped but not realized"); /* remaining bets are off during reparent when we're potentially * mapped, but should not be according to invariants */ if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)) { if (priv->parent_actor == NULL) { if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { if (!CLUTTER_ACTOR_IS_VISIBLE (self) && !(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION)) { g_warning ("Toplevel actor is mapped but not visible"); } } else { g_warning ("Mapped actor %s %p should have a parent", G_OBJECT_TYPE_NAME (self), self); } } else { ClutterActor *parent = priv->parent_actor; /* check for the enable_paint_unmapped flag on any of the * parents; if the flag is enabled at any point of this * branch of the scene graph then all the later checks * become pointless */ while (parent != NULL) { if (parent->priv->enable_paint_unmapped) return; parent = parent->priv->parent_actor; } if (!CLUTTER_ACTOR_IS_VISIBLE (priv->parent_actor)) { g_warning ("Actor should not be mapped if parent " "is not visible"); } if (!CLUTTER_ACTOR_IS_REALIZED (priv->parent_actor)) { g_warning ("Actor should not be mapped if parent " "is not realized"); } if (!(CLUTTER_PRIVATE_FLAGS (priv->parent_actor) & CLUTTER_ACTOR_IS_TOPLEVEL)) { if (!CLUTTER_ACTOR_IS_MAPPED (priv->parent_actor)) g_warning ("Actor is mapped but its non-toplevel " "parent is not mapped"); } } } } } #endif /* CLUTTER_ENABLE_DEBUG */ static void clutter_actor_set_mapped (ClutterActor *self, gboolean mapped) { if (CLUTTER_ACTOR_IS_MAPPED (self) == mapped) return; if (mapped) { CLUTTER_ACTOR_GET_CLASS (self)->map (self); g_assert (CLUTTER_ACTOR_IS_MAPPED (self)); } else { CLUTTER_ACTOR_GET_CLASS (self)->unmap (self); g_assert (!CLUTTER_ACTOR_IS_MAPPED (self)); } } /* this function updates the mapped and realized states according to * invariants, in the appropriate order. */ static void clutter_actor_update_map_state (ClutterActor *self, MapStateChange change) { gboolean was_mapped; gboolean was_realized; was_mapped = CLUTTER_ACTOR_IS_MAPPED (self); was_realized = CLUTTER_ACTOR_IS_REALIZED (self); if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { /* the mapped flag on top-level actors must be set by the * per-backend implementation because it might be asynchronous. * * That is, the MAPPED flag on toplevels currently tracks the X * server mapped-ness of the window, while the expected behavior * (if used to GTK) may be to track WM_STATE!=WithdrawnState. * This creates some weird complexity by breaking the invariant * that if we're visible and all ancestors shown then we are * also mapped - instead, we are mapped if all ancestors * _possibly excepting_ the stage are mapped. The stage * will map/unmap for example when it is minimized or * moved to another workspace. * * So, the only invariant on the stage is that if visible it * should be realized, and that it has to be visible to be * mapped. */ if (CLUTTER_ACTOR_IS_VISIBLE (self)) clutter_actor_realize (self); switch (change) { case MAP_STATE_CHECK: break; case MAP_STATE_MAKE_MAPPED: g_assert (!was_mapped); clutter_actor_set_mapped (self, TRUE); break; case MAP_STATE_MAKE_UNMAPPED: g_assert (was_mapped); clutter_actor_set_mapped (self, FALSE); break; case MAP_STATE_MAKE_UNREALIZED: /* we only use MAKE_UNREALIZED in unparent, * and unparenting a stage isn't possible. * If someone wants to just unrealize a stage * then clutter_actor_unrealize() doesn't * go through this codepath. */ g_warning ("Trying to force unrealize stage is not allowed"); break; } if (CLUTTER_ACTOR_IS_MAPPED (self) && !CLUTTER_ACTOR_IS_VISIBLE (self) && !(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION)) { g_warning ("Clutter toplevel is not visible, but is " "somehow still mapped"); } } else { ClutterActorPrivate *priv = self->priv; ClutterActor *parent = priv->parent_actor; gboolean should_be_mapped; gboolean may_be_realized; gboolean must_be_realized; should_be_mapped = FALSE; may_be_realized = TRUE; must_be_realized = FALSE; if (parent == NULL || change == MAP_STATE_MAKE_UNREALIZED) { may_be_realized = FALSE; } else { /* Maintain invariant that if parent is mapped, and we are * visible, then we are mapped ... unless parent is a * stage, in which case we map regardless of parent's map * state but do require stage to be visible and realized. * * If parent is realized, that does not force us to be * realized; but if parent is unrealized, that does force * us to be unrealized. * * The reason we don't force children to realize with * parents is _clutter_actor_rerealize(); if we require that * a realized parent means children are realized, then to * unrealize an actor we would have to unrealize its * parents, which would end up meaning unrealizing and * hiding the entire stage. So we allow unrealizing a * child (as long as that child is not mapped) while that * child still has a realized parent. * * Also, if we unrealize from leaf nodes to root, and * realize from root to leaf, the invariants are never * violated if we allow children to be unrealized * while parents are realized. * * When unmapping, MAP_STATE_MAKE_UNMAPPED is specified * to force us to unmap, even though parent is still * mapped. This is because we're unmapping from leaf nodes * up to root nodes. */ if (CLUTTER_ACTOR_IS_VISIBLE (self) && change != MAP_STATE_MAKE_UNMAPPED) { gboolean parent_is_visible_realized_toplevel; parent_is_visible_realized_toplevel = (((CLUTTER_PRIVATE_FLAGS (parent) & CLUTTER_ACTOR_IS_TOPLEVEL) != 0) && CLUTTER_ACTOR_IS_VISIBLE (parent) && CLUTTER_ACTOR_IS_REALIZED (parent)); if (CLUTTER_ACTOR_IS_MAPPED (parent) || parent_is_visible_realized_toplevel) { must_be_realized = TRUE; should_be_mapped = TRUE; } } /* if the actor has been set to be painted even if unmapped * then we should map it and check for realization as well; * this is an override for the branch of the scene graph * which begins with this node */ if (priv->enable_paint_unmapped) { if (priv->parent_actor == NULL) g_warning ("Attempting to map an unparented actor"); should_be_mapped = TRUE; must_be_realized = TRUE; } if (!CLUTTER_ACTOR_IS_REALIZED (parent)) may_be_realized = FALSE; } if (change == MAP_STATE_MAKE_MAPPED && !should_be_mapped) { g_warning ("Attempting to map a child that does not " "meet the necessary invariants"); } /* If in reparent, we temporarily suspend unmap and unrealize. * * We want to go in the order "realize, map" and "unmap, unrealize" */ /* Unmap */ if (!should_be_mapped && !(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)) { clutter_actor_set_mapped (self, FALSE); } /* Realize */ if (must_be_realized) clutter_actor_realize (self); /* if we must be realized then we may be, presumably */ g_assert (!(must_be_realized && !may_be_realized)); /* Unrealize */ if (!may_be_realized && !(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)) clutter_actor_unrealize_not_hiding (self); /* Map */ if (should_be_mapped) { if (!must_be_realized) g_warning ("Somehow we think an actor should be mapped but " "not realized, which isn't allowed"); /* realization is allowed to fail (though I don't know what * an app is supposed to do about that - shouldn't it just * be a g_error? anyway, we have to avoid mapping if this * happens) */ if (CLUTTER_ACTOR_IS_REALIZED (self)) clutter_actor_set_mapped (self, TRUE); } } #ifdef CLUTTER_ENABLE_DEBUG /* check all invariants were kept */ clutter_actor_verify_map_state (self); #endif } static void clutter_actor_real_map (ClutterActor *self) { g_assert (!CLUTTER_ACTOR_IS_MAPPED (self)); CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_MAPPED); /* notify on parent mapped before potentially mapping * children, so apps see a top-down notification. */ g_object_notify (G_OBJECT (self), "mapped"); clutter_actor_queue_redraw (self); if (CLUTTER_IS_CONTAINER (self)) clutter_container_foreach_with_internals (CLUTTER_CONTAINER (self), CLUTTER_CALLBACK (clutter_actor_map), NULL); } /** * clutter_actor_map: * @self: A #ClutterActor * * Sets the #CLUTTER_ACTOR_MAPPED flag on the actor and possibly maps * and realizes its children if they are visible. Does nothing if the * actor is not visible. * * Calling this is allowed in only one case: you are implementing the * #ClutterActor::map virtual function in an actor and you need to map * the children of that actor. It is not necessary to call this * if you implement #ClutterContainer because the default implementation * will automatically map children of containers. * * When overriding map, it is mandatory to chain up to the parent * implementation. * * Since: 1.0 */ void clutter_actor_map (ClutterActor *self) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (CLUTTER_ACTOR_IS_MAPPED (self)) return; if (!CLUTTER_ACTOR_IS_VISIBLE (self)) return; clutter_actor_update_map_state (self, MAP_STATE_MAKE_MAPPED); } static void clutter_actor_real_unmap (ClutterActor *self) { g_assert (CLUTTER_ACTOR_IS_MAPPED (self)); if (CLUTTER_IS_CONTAINER (self)) clutter_container_foreach_with_internals (CLUTTER_CONTAINER (self), CLUTTER_CALLBACK (clutter_actor_unmap), NULL); CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_MAPPED); /* notify on parent mapped after potentially unmapping * children, so apps see a bottom-up notification. */ g_object_notify (G_OBJECT (self), "mapped"); /* relinquish keyboard focus if we were unmapped while owning it */ if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)) { ClutterActor *stage; stage = clutter_actor_get_stage (self); if (stage && clutter_stage_get_key_focus (CLUTTER_STAGE (stage)) == self) { clutter_stage_set_key_focus (CLUTTER_STAGE (stage), NULL); } } clutter_actor_queue_redraw (self); } /** * clutter_actor_unmap: * @self: A #ClutterActor * * Unsets the #CLUTTER_ACTOR_MAPPED flag on the actor and possibly * unmaps its children if they were mapped. * * Calling this is allowed in only one case: you are implementing the * #ClutterActor::unmap virtual function in an actor and you need to * unmap the children of that actor. It is not necessary to call this * if you implement #ClutterContainer because the default implementation * will automatically unmap children of containers. * * When overriding unmap, it is mandatory to chain up to the parent * implementation. * * Since: 1.0 */ void clutter_actor_unmap (ClutterActor *self) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (!CLUTTER_ACTOR_IS_MAPPED (self)) return; clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNMAPPED); } static void clutter_actor_real_show (ClutterActor *self) { if (!CLUTTER_ACTOR_IS_VISIBLE (self)) { CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_VISIBLE); /* we notify on the "visible" flag in the clutter_actor_show() * wrapper so the entire show signal emission completes first * (?) */ clutter_actor_update_map_state (self, MAP_STATE_CHECK); clutter_actor_queue_relayout (self); } } /** * clutter_actor_show: * @self: A #ClutterActor * * Flags an actor to be displayed. An actor that isn't shown will not * be rendered on the stage. * * Actors are visible by default. * * If this function is called on an actor without a parent, the * #ClutterActor:show-on-set-parent will be set to %TRUE as a side * effect. */ void clutter_actor_show (ClutterActor *self) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); #ifdef CLUTTER_ENABLE_DEBUG clutter_actor_verify_map_state (self); #endif priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); if (!priv->show_on_set_parent && !priv->parent_actor) { priv->show_on_set_parent = TRUE; g_object_notify (G_OBJECT (self), "show-on-set-parent"); } if (!CLUTTER_ACTOR_IS_VISIBLE (self)) { g_signal_emit (self, actor_signals[SHOW], 0); g_object_notify (G_OBJECT (self), "visible"); } g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_show_all: * @self: a #ClutterActor * * Calls clutter_actor_show() on all children of an actor (if any). * * Since: 0.2 */ void clutter_actor_show_all (ClutterActor *self) { ClutterActorClass *klass; g_return_if_fail (CLUTTER_IS_ACTOR (self)); klass = CLUTTER_ACTOR_GET_CLASS (self); if (klass->show_all) klass->show_all (self); } void clutter_actor_real_hide (ClutterActor *self) { if (CLUTTER_ACTOR_IS_VISIBLE (self)) { CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_VISIBLE); /* we notify on the "visible" flag in the clutter_actor_hide() * wrapper so the entire hide signal emission completes first * (?) */ clutter_actor_update_map_state (self, MAP_STATE_CHECK); clutter_actor_queue_relayout (self); } } /** * clutter_actor_hide: * @self: A #ClutterActor * * Flags an actor to be hidden. A hidden actor will not be * rendered on the stage. * * Actors are visible by default. * * If this function is called on an actor without a parent, the * #ClutterActor:show-on-set-parent property will be set to %FALSE * as a side-effect. */ void clutter_actor_hide (ClutterActor *self) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); #ifdef CLUTTER_ENABLE_DEBUG clutter_actor_verify_map_state (self); #endif priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); if (priv->show_on_set_parent && !priv->parent_actor) { priv->show_on_set_parent = FALSE; g_object_notify (G_OBJECT (self), "show-on-set-parent"); } if (CLUTTER_ACTOR_IS_VISIBLE (self)) { g_signal_emit (self, actor_signals[HIDE], 0); g_object_notify (G_OBJECT (self), "visible"); } g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_hide_all: * @self: a #ClutterActor * * Calls clutter_actor_hide() on all child actors (if any). * * Since: 0.2 */ void clutter_actor_hide_all (ClutterActor *self) { ClutterActorClass *klass; g_return_if_fail (CLUTTER_IS_ACTOR (self)); klass = CLUTTER_ACTOR_GET_CLASS (self); if (klass->hide_all) klass->hide_all (self); } /** * clutter_actor_realize: * @self: A #ClutterActor * * Creates any underlying graphics resources needed by the actor to be * displayed. * * Realization means the actor is now tied to a specific rendering context * (that is, a specific toplevel stage). * * This function does nothing if the actor is already realized. * * Because a realized actor must have realized parent actors, calling * clutter_actor_realize() will also realize all parents of the actor. * * This function does not realize child actors, except in the special * case that realizing the stage, when the stage is visible, will * suddenly map (and thus realize) the children of the stage. **/ void clutter_actor_realize (ClutterActor *self) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); #ifdef CLUTTER_ENABLE_DEBUG clutter_actor_verify_map_state (self); #endif if (CLUTTER_ACTOR_IS_REALIZED (self)) return; /* To be realized, our parent actors must be realized first. * This will only succeed if we're inside a toplevel. */ if (self->priv->parent_actor != NULL) clutter_actor_realize (self->priv->parent_actor); if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { /* toplevels can be realized at any time */ } else { /* "Fail" the realization if parent is missing or unrealized; * this should really be a g_warning() not some kind of runtime * failure; how can an app possibly recover? Instead it's a bug * in the app and the app should get an explanatory warning so * someone can fix it. But for now it's too hard to fix this * because e.g. ClutterTexture needs reworking. */ if (self->priv->parent_actor == NULL || !CLUTTER_ACTOR_IS_REALIZED (self->priv->parent_actor)) return; } CLUTTER_NOTE (ACTOR, "Realizing actor '%s' [%p]", self->priv->name ? self->priv->name : G_OBJECT_TYPE_NAME (self), self); CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_REALIZED); g_object_notify (G_OBJECT (self), "realized"); g_signal_emit (self, actor_signals[REALIZE], 0); /* Stage actor is allowed to unset the realized flag again in its * default signal handler, though that is a pathological situation. */ /* If realization "failed" we'll have to update child state. */ clutter_actor_update_map_state (self, MAP_STATE_CHECK); } void clutter_actor_real_unrealize (ClutterActor *self) { /* we must be unmapped (implying our children are also unmapped) */ g_assert (!CLUTTER_ACTOR_IS_MAPPED (self)); if (CLUTTER_IS_CONTAINER (self)) clutter_container_foreach_with_internals (CLUTTER_CONTAINER (self), CLUTTER_CALLBACK (clutter_actor_unrealize_not_hiding), NULL); } /** * clutter_actor_unrealize: * @self: A #ClutterActor * * Frees up any underlying graphics resources needed by the actor to * be displayed. * * Unrealization means the actor is now independent of any specific * rendering context (is not attached to a specific toplevel stage). * * Because mapped actors must be realized, actors may not be * unrealized if they are mapped. This function hides the actor to be * sure it isn't mapped, an application-visible side effect that you * may not be expecting. * * This function should not really be in the public API, because * there isn't a good reason to call it. ClutterActor will already * unrealize things for you when it's important to do so. * * If you were using clutter_actor_unrealize() in a dispose * implementation, then don't, just chain up to ClutterActor's * dispose. * * If you were using clutter_actor_unrealize() to implement * unrealizing children of your container, then don't, ClutterActor * will already take care of that. * * If you were using clutter_actor_unrealize() to re-realize to * create your resources in a different way, then use * _clutter_actor_rerealize() (inside Clutter) or just call your * code that recreates your resources directly (outside Clutter). */ void clutter_actor_unrealize (ClutterActor *self) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (!CLUTTER_ACTOR_IS_MAPPED (self)); #ifdef CLUTTER_ENABLE_DEBUG clutter_actor_verify_map_state (self); #endif clutter_actor_hide (self); clutter_actor_unrealize_not_hiding (self); } /** * clutter_actor_unrealize_not_hiding: * @self: A #ClutterActor * * Frees up any underlying graphics resources needed by the actor to * be displayed. * * Unrealization means the actor is now independent of any specific * rendering context (is not attached to a specific toplevel stage). * * Because mapped actors must be realized, actors may not be * unrealized if they are mapped. You must hide the actor or one of * its parents before attempting to unrealize. * * This function is separate from clutter_actor_unrealize() because it * does not automatically hide the actor. * Actors need not be hidden to be unrealized, they just need to * be unmapped. In fact we don't want to mess up the application's * setting of the "visible" flag, so hiding is very undesirable. * * clutter_actor_unrealize() does a clutter_actor_hide() just for * backward compatibility. */ static void clutter_actor_unrealize_not_hiding (ClutterActor *self) { /* All callers of clutter_actor_unrealize_not_hiding() should have * taken care of unmapping the actor first. This means * all our children should also be unmapped. */ g_assert (!CLUTTER_ACTOR_IS_MAPPED (self)); if (!CLUTTER_ACTOR_IS_REALIZED (self)) return; /* The default handler for the signal should recursively unrealize * child actors. We want to unset the realized flag only _after_ * child actors are unrealized, to maintain invariants. */ g_signal_emit (self, actor_signals[UNREALIZE], 0); CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_REALIZED); g_object_notify (G_OBJECT (self), "realized"); } /** * _clutter_actor_rerealize: * @self: A #ClutterActor * @callback: Function to call while unrealized * @data: data for callback * * If an actor is already unrealized, this just calls the callback. * * If it is realized, it unrealizes temporarily, calls the callback, * and then re-realizes the actor. * * As a side effect, leaves all children of the actor unrealized if * the actor was realized but not showing. This is because when we * unrealize the actor temporarily we must unrealize its children * (e.g. children of a stage can't be realized if stage window is * gone). And we aren't clever enough to save the realization state of * all children. In most cases this should not matter, because * the children will automatically realize when they next become mapped. */ void _clutter_actor_rerealize (ClutterActor *self, ClutterCallback callback, void *data) { gboolean was_mapped; gboolean was_showing; gboolean was_realized; g_return_if_fail (CLUTTER_IS_ACTOR (self)); #ifdef CLUTTER_ENABLE_DEBUG clutter_actor_verify_map_state (self); #endif was_realized = CLUTTER_ACTOR_IS_REALIZED (self); was_mapped = CLUTTER_ACTOR_IS_MAPPED (self); was_showing = CLUTTER_ACTOR_IS_VISIBLE (self); /* Must be unmapped to unrealize. Note we only have to hide this * actor if it was mapped (if all parents were showing). If actor * is merely visible (but not mapped), then that's fine, we can * leave it visible. */ if (was_mapped) clutter_actor_hide (self); g_assert (!CLUTTER_ACTOR_IS_MAPPED (self)); /* unrealize self and all children */ clutter_actor_unrealize_not_hiding (self); if (callback != NULL) { (* callback) (self, data); } if (was_showing) clutter_actor_show (self); /* will realize only if mapping implies it */ else if (was_realized) clutter_actor_realize (self); /* realize self and all parents */ } static void clutter_actor_real_pick (ClutterActor *self, const ClutterColor *color) { /* the default implementation is just to paint a rectangle * with the same size of the actor using the passed color */ if (clutter_actor_should_pick_paint (self)) { ClutterActorBox box = { 0, }; float width, height; clutter_actor_get_allocation_box (self, &box); width = box.x2 - box.x1; height = box.y2 - box.y1; cogl_set_source_color4ub (color->red, color->green, color->blue, color->alpha); cogl_rectangle (0, 0, width, height); } } /** * clutter_actor_pick: * @self: A #ClutterActor * @color: A #ClutterColor * * Renders a silhouette of the actor using the supplied color. Used * internally for mapping pointer events to actors. * * This function should never be called directly by applications. * * Subclasses overiding the ClutterActor::pick() method should call * clutter_actor_should_pick_paint() to decide whether to render their * silhouette. Containers should always recursively call pick for * each child. * * This function will emit the #ClutterActor::pick signal. * * Since: 0.4 */ void clutter_actor_pick (ClutterActor *self, const ClutterColor *color) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (color != NULL); g_signal_emit (self, actor_signals[PICK], 0, color); } /** * clutter_actor_should_pick_paint: * @self: A #ClutterActor * * Should be called inside the implementation of the * #ClutterActor::pick virtual function in order to check whether * the actor should paint itself in pick mode or not. * * This function should never be called directly by applications. * * Return value: %TRUE if the actor should paint its silhouette, * %FALSE otherwise */ gboolean clutter_actor_should_pick_paint (ClutterActor *self) { ClutterMainContext *context; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); context = clutter_context_get_default (); if (CLUTTER_ACTOR_IS_MAPPED (self) && (G_UNLIKELY (context->pick_mode == CLUTTER_PICK_ALL) || CLUTTER_ACTOR_IS_REACTIVE (self))) return TRUE; return FALSE; } static void clutter_actor_real_get_preferred_width (ClutterActor *self, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p) { /* Default implementation is always 0x0, usually an actor * using this default is relying on someone to set the * request manually */ CLUTTER_NOTE (LAYOUT, "Default preferred width: 0, 0"); if (min_width_p) *min_width_p = 0; if (natural_width_p) *natural_width_p = 0; } static void clutter_actor_real_get_preferred_height (ClutterActor *self, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p) { /* Default implementation is always 0x0, usually an actor * using this default is relying on someone to set the * request manually */ CLUTTER_NOTE (LAYOUT, "Default preferred height: 0, 0"); if (min_height_p) *min_height_p = 0; if (natural_height_p) *natural_height_p = 0; } static void clutter_actor_store_old_geometry (ClutterActor *self, ClutterActorBox *box) { *box = self->priv->allocation; } static inline void clutter_actor_notify_if_geometry_changed (ClutterActor *self, const ClutterActorBox *old) { ClutterActorPrivate *priv = self->priv; GObject *obj = G_OBJECT (self); g_object_freeze_notify (obj); /* to avoid excessive requisition or allocation cycles we * use the cached values. * * - if we don't have an allocation we assume that we need * to notify anyway * - if we don't have a width or a height request we notify * width and height * - if we have a valid allocation then we check the old * bounding box with the current allocation and we notify * the changes */ if (priv->needs_allocation) { g_object_notify (obj, "x"); g_object_notify (obj, "y"); g_object_notify (obj, "width"); g_object_notify (obj, "height"); } else if (priv->needs_width_request || priv->needs_height_request) { g_object_notify (obj, "width"); g_object_notify (obj, "height"); } else { gfloat xu, yu; gfloat widthu, heightu; xu = priv->allocation.x1; yu = priv->allocation.y1; widthu = priv->allocation.x2 - priv->allocation.x1; heightu = priv->allocation.y2 - priv->allocation.y1; if (xu != old->x1) g_object_notify (obj, "x"); if (yu != old->y1) g_object_notify (obj, "y"); if (widthu != (old->x2 - old->x1)) g_object_notify (obj, "width"); if (heightu != (old->y2 - old->y1)) g_object_notify (obj, "height"); } g_object_thaw_notify (obj); } static void clutter_actor_real_allocate (ClutterActor *self, const ClutterActorBox *box, gboolean absolute_origin_changed) { ClutterActorPrivate *priv = self->priv; gboolean x1_changed, y1_changed, x2_changed, y2_changed; ClutterActorBox old = { 0, }; clutter_actor_store_old_geometry (self, &old); x1_changed = priv->allocation.x1 != box->x1; y1_changed = priv->allocation.y1 != box->y1; x2_changed = priv->allocation.x2 != box->x2; y2_changed = priv->allocation.y2 != box->y2; priv->allocation = *box; priv->needs_allocation = FALSE; g_object_freeze_notify (G_OBJECT (self)); if (x1_changed || y1_changed || x2_changed || y2_changed) g_object_notify (G_OBJECT (self), "allocation"); clutter_actor_notify_if_geometry_changed (self, &old); g_object_thaw_notify (G_OBJECT (self)); } static void clutter_actor_queue_redraw_with_origin (ClutterActor *self, ClutterActor *origin) { /* short-circuit the trivial case */ if (!CLUTTER_ACTOR_IS_MAPPED(self)) return; /* already queued since last paint() */ if (self->priv->queued_redraw) return; /* calls klass->queue_redraw in default handler */ g_signal_emit (self, actor_signals[QUEUE_REDRAW], 0, origin); } static void clutter_actor_real_queue_redraw (ClutterActor *self, ClutterActor *origin) { ClutterActor *parent; /* short-circuit the trivial case */ if (!CLUTTER_ACTOR_IS_MAPPED (self)) return; /* already queued since last paint() */ if (self->priv->queued_redraw) return; CLUTTER_NOTE (PAINT, "Redraw queued on '%s'", clutter_actor_get_name (self) ? clutter_actor_get_name (self) : G_OBJECT_TYPE_NAME (self)); self->priv->queued_redraw = TRUE; /* notify parents, if they are all visible eventually we'll * queue redraw on the stage, which queues the redraw idle. */ parent = clutter_actor_get_parent (self); if (parent != NULL) { /* this will go up recursively */ clutter_actor_queue_redraw_with_origin (parent, origin); } } /* like ClutterVertex, but with a w component */ typedef struct { gfloat x; gfloat y; gfloat z; gfloat w; } full_vertex_t; /* copies a fixed vertex into a ClutterVertex */ static inline void full_vertex_to_units (const full_vertex_t *f, ClutterVertex *u) { u->x = f->x; u->y = f->y; u->z = f->z; } /* Transforms a vertex using the passed matrix; vertex is * an in-out parameter */ static void mtx_transform (const CoglMatrix *matrix, full_vertex_t *vertex) { cogl_matrix_transform_point (matrix, &vertex->x, &vertex->y, &vertex->z, &vertex->w); } /* Help macros to scale from OpenGL <-1,1> coordinates system to our * X-window based <0,window-size> coordinates */ #define MTX_GL_SCALE_X(x,w,v1,v2) ((((((x) / (w)) + 1.0) / 2) * (v1)) + (v2)) #define MTX_GL_SCALE_Y(y,w,v1,v2) ((v1) - (((((y) / (w)) + 1.0) / 2) * (v1)) + (v2)) #define MTX_GL_SCALE_Z(z,w,v1,v2) (MTX_GL_SCALE_X ((z), (w), (v1), (v2))) /* transforms a 4-tuple of coordinates using @matrix and * places the result into a fixed @vertex */ static inline void full_vertex_transform (const CoglMatrix *matrix, gfloat x, gfloat y, gfloat z, gfloat w, full_vertex_t *vertex) { full_vertex_t tmp = { 0, }; tmp.x = x; tmp.y = y; tmp.z = z; tmp.w = w; mtx_transform (matrix, &tmp); *vertex = tmp; } /* scales a fixed @vertex using @matrix and @viewport, and * transforms the result into a ClutterVertex, filling @vertex_p */ static inline void full_vertex_scale (const CoglMatrix *matrix, const full_vertex_t *vertex, const gfloat viewport[], ClutterVertex *vertex_p) { gfloat v_x, v_y, v_width, v_height; full_vertex_t tmp = { 0, }; tmp = *vertex; mtx_transform (matrix, &tmp); v_x = viewport[0]; v_y = viewport[1]; v_width = viewport[2]; v_height = viewport[3]; tmp.x = MTX_GL_SCALE_X (tmp.x, tmp.w, v_width, v_x); tmp.y = MTX_GL_SCALE_Y (tmp.y, tmp.w, v_height, v_y); tmp.z = MTX_GL_SCALE_Z (tmp.z, tmp.w, v_width, v_x); tmp.w = 0; full_vertex_to_units (&tmp, vertex_p); } /* Applies the transforms associated with this actor and its ancestors, * retrieves the resulting OpenGL modelview matrix, and uses the matrix * to transform the supplied point * * The point coordinates are in-out parameters */ static void clutter_actor_transform_point_relative (ClutterActor *actor, ClutterActor *ancestor, gfloat *x, gfloat *y, gfloat *z, gfloat *w) { full_vertex_t vertex = { 0, }; CoglMatrix matrix; vertex.x = (x != NULL) ? *x : 0; vertex.y = (y != NULL) ? *y : 0; vertex.z = (z != NULL) ? *z : 0; vertex.w = (w != NULL) ? *w : 0; cogl_push_matrix(); _clutter_actor_apply_modelview_transform_recursive (actor, ancestor); cogl_get_modelview_matrix (&matrix); mtx_transform (&matrix, &vertex); cogl_pop_matrix(); if (x) *x = vertex.x; if (y) *y = vertex.y; if (z) *z = vertex.z; if (w) *w = vertex.w; } /* Applies the transforms associated with this actor and its ancestors, * retrieves the resulting OpenGL modelview matrix, and uses the matrix * to transform the supplied point */ static void clutter_actor_transform_point (ClutterActor *actor, gfloat *x, gfloat *y, gfloat *z, gfloat *w) { full_vertex_t vertex = { 0, }; CoglMatrix matrix; vertex.x = (x != NULL) ? *x : 0; vertex.y = (y != NULL) ? *y : 0; vertex.z = (z != NULL) ? *z : 0; vertex.w = (w != NULL) ? *w : 0; cogl_push_matrix(); _clutter_actor_apply_modelview_transform_recursive (actor, NULL); cogl_get_modelview_matrix (&matrix); mtx_transform (&matrix, &vertex); cogl_pop_matrix(); if (x) *x = vertex.x; if (y) *y = vertex.y; if (z) *z = vertex.z; if (w) *w = vertex.w; } /** * clutter_actor_apply_relative_transform_to_point: * @self: A #ClutterActor * @ancestor: A #ClutterActor ancestor, or %NULL to use the * default #ClutterStage * @point: A point as #ClutterVertex * @vertex: The translated #ClutterVertex * * Transforms @point in coordinates relative to the actor into * ancestor-relative coordinates using the relevant transform * stack (i.e. scale, rotation, etc). * * If @ancestor is %NULL the ancestor will be the #ClutterStage. In * this case, the coordinates returned will be the coordinates on * the stage before the projection is applied. This is different from * the behaviour of clutter_actor_apply_transform_to_point(). * * Since: 0.6 */ void clutter_actor_apply_relative_transform_to_point (ClutterActor *self, ClutterActor *ancestor, const ClutterVertex *point, ClutterVertex *vertex) { gfloat x, y, z, w; full_vertex_t tmp; gfloat v[4]; g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (ancestor == NULL || CLUTTER_IS_ACTOR (ancestor)); g_return_if_fail (point != NULL); g_return_if_fail (vertex != NULL); x = vertex->x; y = vertex->y; z = vertex->z; w = 1.0; /* First we tranform the point using the OpenGL modelview matrix */ clutter_actor_transform_point_relative (self, ancestor, &x, &y, &z, &w); cogl_get_viewport (v); /* The w[3] parameter should always be 1.0 here, so we ignore it; otherwise * we would have to divide the original verts with it. */ tmp.x = (x + 0.5) * v[2]; tmp.y = (0.5 - y) * v[3]; tmp.z = (z + 0.5) * v[2]; tmp.w = 0; full_vertex_to_units (&tmp, vertex); } /** * clutter_actor_apply_transform_to_point: * @self: A #ClutterActor * @point: A point as #ClutterVertex * @vertex: The translated #ClutterVertex * * Transforms @point in coordinates relative to the actor * into screen-relative coordinates with the current actor * transformation (i.e. scale, rotation, etc) * * Since: 0.4 **/ void clutter_actor_apply_transform_to_point (ClutterActor *self, const ClutterVertex *point, ClutterVertex *vertex) { full_vertex_t tmp = { 0, }; gfloat x, y, z, w; CoglMatrix matrix_p; gfloat v[4]; g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (point != NULL); g_return_if_fail (vertex != NULL); x = point->x; y = point->y; z = point->z; w = 1.0; /* First we tranform the point using the OpenGL modelview matrix */ clutter_actor_transform_point (self, &x, &y, &z, &w); tmp.x = x; tmp.y = y; tmp.z = z; tmp.w = w; cogl_get_projection_matrix (&matrix_p); cogl_get_viewport (v); /* Now, transform it again with the projection matrix */ mtx_transform (&matrix_p, &tmp); /* Finaly translate from OpenGL coords to window coords */ vertex->x = MTX_GL_SCALE_X (tmp.x, tmp.w, v[2], v[0]); vertex->y = MTX_GL_SCALE_Y (tmp.y, tmp.w, v[3], v[1]); vertex->z = MTX_GL_SCALE_Z (tmp.z, tmp.w, v[2], v[0]); } /* Recursively tranform supplied vertices with the tranform for the current * actor and up to the ancestor (like clutter_actor_transform_point() but * for all the vertices in one go). */ static void clutter_actor_transform_vertices_relative (ClutterActor *self, ClutterActor *ancestor, full_vertex_t vertices[]) { ClutterActorPrivate *priv = self->priv; gfloat width, height; CoglMatrix mtx; width = priv->allocation.x2 - priv->allocation.x1; height = priv->allocation.y2 - priv->allocation.y1; cogl_push_matrix(); _clutter_actor_apply_modelview_transform_recursive (self, ancestor); cogl_get_modelview_matrix (&mtx); full_vertex_transform (&mtx, 0, 0, 0, 1.0, &vertices[0]); full_vertex_transform (&mtx, width, 0, 0, 1.0, &vertices[1]); full_vertex_transform (&mtx, 0, height, 0, 1.0, &vertices[2]); full_vertex_transform (&mtx, width, height, 0, 1.0, &vertices[3]); cogl_pop_matrix(); } /* Recursively tranform supplied box with the tranform for the current * actor and all its ancestors (like clutter_actor_transform_point() * but for all the vertices in one go) and project it into screen * coordinates */ static void clutter_actor_transform_and_project_box (ClutterActor *self, const ClutterActorBox *box, ClutterVertex verts[4]) { ClutterActor *stage; CoglMatrix mtx; CoglMatrix mtx_p; gfloat v[4]; gfloat width, height; full_vertex_t vertices[4]; width = box->x2 - box->x1; height = box->y2 - box->y1; /* We essentially have to dupe some code from clutter_redraw() here * to make sure GL Matrices etc are initialised if we're called and we * havn't yet rendered anything. * * Simply duping code for now in wait for Cogl cleanup that can hopefully * address this in a nicer way. */ stage = clutter_actor_get_stage (self); /* FIXME: if were not yet added to a stage, its probably unsafe to * return default - ideally the func should fail */ if (stage == NULL) stage = clutter_stage_get_default (); clutter_stage_ensure_current (CLUTTER_STAGE (stage)); _clutter_stage_maybe_setup_viewport (CLUTTER_STAGE (stage)); cogl_push_matrix(); _clutter_actor_apply_modelview_transform_recursive (self, NULL); cogl_get_modelview_matrix (&mtx); full_vertex_transform (&mtx, 0, 0, 0, 1.0, &vertices[0]); full_vertex_transform (&mtx, width, 0, 0, 1.0, &vertices[1]); full_vertex_transform (&mtx, 0, height, 0, 1.0, &vertices[2]); full_vertex_transform (&mtx, width, height, 0, 1.0, &vertices[3]); cogl_pop_matrix(); cogl_get_projection_matrix (&mtx_p); cogl_get_viewport (v); full_vertex_scale (&mtx_p, &vertices[0], v, &verts[0]); full_vertex_scale (&mtx_p, &vertices[1], v, &verts[1]); full_vertex_scale (&mtx_p, &vertices[2], v, &verts[2]); full_vertex_scale (&mtx_p, &vertices[3], v, &verts[3]); } /** * clutter_actor_get_allocation_vertices: * @self: A #ClutterActor * @ancestor: A #ClutterActor to calculate the vertices against, or %NULL * to use the default #ClutterStage * @verts: (out) (array): return location for an array of 4 #ClutterVertex in which * to store the result. * * Calculates the transformed coordinates of the four corners of the * actor in the plane of @ancestor. The returned vertices relate to * the #ClutterActorBox coordinates as follows: * * @verts[0] contains (x1, y1) * @verts[1] contains (x2, y1) * @verts[2] contains (x1, y2) * @verts[3] contains (x2, y2) * * * If @ancestor is %NULL the ancestor will be the #ClutterStage. In * this case, the coordinates returned will be the coordinates on * the stage before the projection is applied. This is different from * the behaviour of clutter_actor_get_abs_allocation_vertices(). * * Since: 0.6 */ void clutter_actor_get_allocation_vertices (ClutterActor *self, ClutterActor *ancestor, ClutterVertex verts[4]) { ClutterActorPrivate *priv; ClutterActor *stage; gfloat v[4]; full_vertex_t vertices[4]; full_vertex_t tmp = { 0, }; g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (ancestor == NULL || CLUTTER_IS_ACTOR (ancestor)); priv = self->priv; /* We essentially have to dupe some code from clutter_redraw() here * to make sure GL Matrices etc are initialised if we're called and we * havn't yet rendered anything. * * Simply duping code for now in wait for Cogl cleanup that can hopefully * address this in a nicer way. */ stage = clutter_actor_get_stage (self); /* FIXME: if were not yet added to a stage, its probably unsafe to * return default - idealy the func should fail */ if (stage == NULL) stage = clutter_stage_get_default (); clutter_stage_ensure_current (CLUTTER_STAGE (stage)); _clutter_stage_maybe_setup_viewport (CLUTTER_STAGE (stage)); /* if the actor needs to be allocated we force a relayout, so that * clutter_actor_transform_vertices_relative() will have valid values * to use in the transformations */ if (priv->needs_allocation) _clutter_stage_maybe_relayout (stage); clutter_actor_transform_vertices_relative (self, ancestor, vertices); cogl_get_viewport (v); /* The w[3] parameter should always be 1.0 here, so we ignore it; * otherwise we would have to divide the original verts with it. */ tmp.x = ((vertices[0].x + 0.5) * v[2]); tmp.y = ((0.5 - vertices[0].y) * v[3]); tmp.z = ((vertices[0].z + 0.5) * v[2]); full_vertex_to_units (&tmp, &verts[0]); tmp.x = ((vertices[1].x + 0.5) * v[2]); tmp.y = ((0.5 - vertices[1].y) * v[3]); tmp.z = ((vertices[1].z + 0.5) * v[2]); full_vertex_to_units (&tmp, &verts[1]); tmp.x = ((vertices[2].x + 0.5) * v[2]); tmp.y = ((0.5 - vertices[2].y) * v[3]); tmp.z = ((vertices[2].z + 0.5) * v[2]); full_vertex_to_units (&tmp, &verts[2]); tmp.x = ((vertices[3].x + 0.5) * v[2]); tmp.y = ((0.5 - vertices[3].y) * v[3]); tmp.z = ((vertices[3].z + 0.5) * v[2]); full_vertex_to_units (&tmp, &verts[3]); } /** * clutter_actor_get_abs_allocation_vertices: * @self: A #ClutterActor * @verts: Pointer to a location of an array of 4 #ClutterVertex where to * store the result. * * Calculates the transformed screen coordinates of the four corners of * the actor; the returned vertices relate to the #ClutterActorBox * coordinates as follows: * * v[0] contains (x1, y1) * v[1] contains (x2, y1) * v[2] contains (x1, y2) * v[3] contains (x2, y2) * * * Since: 0.4 */ void clutter_actor_get_abs_allocation_vertices (ClutterActor *self, ClutterVertex verts[4]) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; /* if the actor needs to be allocated we force a relayout, so that * the actor allocation box will be valid for * clutter_actor_transform_and_project_box() */ if (priv->needs_allocation) { ClutterActor *stage = clutter_actor_get_stage (self); /* FIXME: if were not yet added to a stage, its probably unsafe to * return default - idealy the func should fail */ if (stage == NULL) stage = clutter_stage_get_default (); _clutter_stage_maybe_relayout (stage); } clutter_actor_transform_and_project_box (self, &self->priv->allocation, verts); } /* Applies the transforms associated with this actor to the * OpenGL modelview matrix. * * This function does not push/pop matrix; it is the responsibility * of the caller to do so as appropriate */ static void _clutter_actor_apply_modelview_transform (ClutterActor *self) { ClutterActorPrivate *priv = self->priv; gboolean is_stage = CLUTTER_IS_STAGE (self); if (!is_stage) cogl_translate (priv->allocation.x1, priv->allocation.y1, 0); if (priv->z) cogl_translate (0, 0, priv->z); /* * because the rotation involves translations, we must scale before * applying the rotations (if we apply the scale after the rotations, * the translations included in the rotation are not scaled and so the * entire object will move on the screen as a result of rotating it). */ if (priv->scale_x != 1.0 || priv->scale_y != 1.0) { TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->scale_center, cogl_scale (priv->scale_x, priv->scale_y, 1.0)); } if (priv->rzang) TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->rz_center, cogl_rotate (priv->rzang, 0, 0, 1.0)); if (priv->ryang) TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->ry_center, cogl_rotate (priv->ryang, 0, 1.0, 0)); if (priv->rxang) TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->rx_center, cogl_rotate (priv->rxang, 1.0, 0, 0)); if (!is_stage && !clutter_anchor_coord_is_zero (&priv->anchor)) { gfloat x, y, z; clutter_anchor_coord_get_units (self, &priv->anchor, &x, &y, &z); cogl_translate (-x, -y, -z); } } /* Recursively applies the transforms associated with this actor and * its ancestors to the OpenGL modelview matrix. Use NULL if you want this * to go all the way down to the stage. * * This function does not push/pop matrix; it is the responsibility * of the caller to do so as appropriate */ void _clutter_actor_apply_modelview_transform_recursive (ClutterActor *self, ClutterActor *ancestor) { ClutterActor *parent, *stage; parent = clutter_actor_get_parent (self); /* * If we reached the ancestor, quit * NB: NULL ancestor means the stage, and this will not trigger * (as it should not) */ if (self == ancestor) return; stage = clutter_actor_get_stage (self); /* FIXME: if were not yet added to a stage, its probably unsafe to * return default - idealy the func should fail */ if (stage == NULL) stage = clutter_stage_get_default (); if (parent) _clutter_actor_apply_modelview_transform_recursive (parent, ancestor); else if (self != stage) _clutter_actor_apply_modelview_transform (stage); _clutter_actor_apply_modelview_transform (self); } /** * clutter_actor_paint: * @self: A #ClutterActor * * Renders the actor to display. * * This function should not be called directly by applications. * Call clutter_actor_queue_redraw() to queue paints, instead. * * This function will emit the #ClutterActor::paint signal. */ void clutter_actor_paint (ClutterActor *self) { ClutterActorPrivate *priv; ClutterMainContext *context; gboolean clip_set = FALSE; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; context = clutter_context_get_default (); /* It's an important optimization that we consider painting of * actors with 0 opacity to be a NOP... */ if (G_LIKELY (context->pick_mode == CLUTTER_PICK_NONE) && priv->opacity == 0) { priv->queued_redraw = FALSE; return; } /* if we aren't paintable (not in a toplevel with all * parents paintable) then do nothing. */ if (!CLUTTER_ACTOR_IS_MAPPED (self)) return; /* mark that we are in the paint process */ CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT); cogl_push_matrix(); if (priv->enable_model_view_transform) _clutter_actor_apply_modelview_transform (self); if (priv->has_clip) { cogl_clip_push (priv->clip[0], priv->clip[1], priv->clip[2], priv->clip[3]); clip_set = TRUE; } else if (priv->clip_to_allocation) { gfloat width, height; width = priv->allocation.x2 - priv->allocation.x1; height = priv->allocation.y2 - priv->allocation.y1; cogl_clip_push (0, 0, width, height); clip_set = TRUE; } if (G_UNLIKELY (context->pick_mode != CLUTTER_PICK_NONE)) { ClutterColor col = { 0, }; _clutter_id_to_color (clutter_actor_get_gid (self), &col); /* Actor will then paint silhouette of itself in supplied * color. See clutter_stage_get_actor_at_pos() for where * picking is enabled. */ g_signal_emit (self, actor_signals[PICK], 0, &col); } else { clutter_actor_shader_pre_paint (self, FALSE); self->priv->queued_redraw = FALSE; g_signal_emit (self, actor_signals[PAINT], 0); clutter_actor_shader_post_paint (self); } if (clip_set) cogl_clip_pop(); cogl_pop_matrix(); /* paint sequence complete */ CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT); } /* internal helper function set the rotation angle without affecting the center point */ static void clutter_actor_set_rotation_internal (ClutterActor *self, ClutterRotateAxis axis, gdouble angle) { ClutterActorPrivate *priv = self->priv; g_object_ref (self); g_object_freeze_notify (G_OBJECT (self)); switch (axis) { case CLUTTER_X_AXIS: priv->rxang = angle; g_object_notify (G_OBJECT (self), "rotation-angle-x"); break; case CLUTTER_Y_AXIS: priv->ryang = angle; g_object_notify (G_OBJECT (self), "rotation-angle-y"); break; case CLUTTER_Z_AXIS: priv->rzang = angle; g_object_notify (G_OBJECT (self), "rotation-angle-z"); break; } g_object_thaw_notify (G_OBJECT (self)); g_object_unref (self); if (CLUTTER_ACTOR_IS_VISIBLE (self)) clutter_actor_queue_redraw (self); } static void clutter_actor_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { ClutterActor *actor; ClutterActorPrivate *priv; actor = CLUTTER_ACTOR(object); priv = actor->priv; switch (prop_id) { case PROP_X: clutter_actor_set_x (actor, g_value_get_int (value)); break; case PROP_Y: clutter_actor_set_y (actor, g_value_get_int (value)); break; case PROP_WIDTH: clutter_actor_set_width (actor, g_value_get_int (value)); break; case PROP_HEIGHT: clutter_actor_set_height (actor, g_value_get_int (value)); break; case PROP_FIXED_X: clutter_actor_set_x (actor, clutter_value_get_unit (value)); break; case PROP_FIXED_Y: clutter_actor_set_y (actor, clutter_value_get_unit (value)); break; case PROP_FIXED_POSITION_SET: clutter_actor_set_fixed_position_set (actor, g_value_get_boolean (value)); break; case PROP_MIN_WIDTH: clutter_actor_set_min_width (actor, clutter_value_get_unit (value)); break; case PROP_MIN_HEIGHT: clutter_actor_set_min_height (actor, clutter_value_get_unit (value)); break; case PROP_NATURAL_WIDTH: clutter_actor_set_natural_width (actor, clutter_value_get_unit (value)); break; case PROP_NATURAL_HEIGHT: clutter_actor_set_natural_height (actor, clutter_value_get_unit (value)); break; case PROP_MIN_WIDTH_SET: clutter_actor_set_min_width_set (actor, g_value_get_boolean (value)); break; case PROP_MIN_HEIGHT_SET: clutter_actor_set_min_height_set (actor, g_value_get_boolean (value)); break; case PROP_NATURAL_WIDTH_SET: clutter_actor_set_natural_width_set (actor, g_value_get_boolean (value)); break; case PROP_NATURAL_HEIGHT_SET: clutter_actor_set_natural_height_set (actor, g_value_get_boolean (value)); break; case PROP_REQUEST_MODE: clutter_actor_set_request_mode (actor, g_value_get_enum (value)); break; case PROP_DEPTH: clutter_actor_set_depth (actor, g_value_get_int (value)); break; case PROP_OPACITY: clutter_actor_set_opacity (actor, g_value_get_uchar (value)); break; case PROP_NAME: clutter_actor_set_name (actor, g_value_get_string (value)); break; case PROP_VISIBLE: if (g_value_get_boolean (value) == TRUE) clutter_actor_show (actor); else clutter_actor_hide (actor); break; case PROP_SCALE_X: clutter_actor_set_scale (actor, g_value_get_double (value), priv->scale_y); break; case PROP_SCALE_Y: clutter_actor_set_scale (actor, priv->scale_x, g_value_get_double (value)); break; case PROP_SCALE_CENTER_X: { gint center_x = g_value_get_int (value); gfloat center_y; clutter_anchor_coord_get_units (actor, &priv->scale_center, NULL, ¢er_y, NULL); clutter_actor_set_scale_full (actor, priv->scale_x, priv->scale_y, center_x, center_y); } break; case PROP_SCALE_CENTER_Y: { gint center_y = g_value_get_int (value); gfloat center_x; clutter_anchor_coord_get_units (actor, &priv->scale_center, ¢er_x, NULL, NULL); clutter_actor_set_scale_full (actor, priv->scale_x, priv->scale_y, center_x, center_y); } break; case PROP_SCALE_GRAVITY: clutter_actor_set_scale_with_gravity (actor, priv->scale_x, priv->scale_y, g_value_get_enum (value)); break; case PROP_CLIP: { ClutterGeometry *geom = g_value_get_boxed (value); clutter_actor_set_clip (actor, geom->x, geom->y, geom->width, geom->height); } break; case PROP_CLIP_TO_ALLOCATION: if (priv->clip_to_allocation != g_value_get_boolean (value)) { priv->clip_to_allocation = g_value_get_boolean (value); clutter_actor_queue_redraw (actor); } break; case PROP_REACTIVE: clutter_actor_set_reactive (actor, g_value_get_boolean (value)); break; case PROP_ROTATION_ANGLE_X: clutter_actor_set_rotation_internal (actor, CLUTTER_X_AXIS, g_value_get_double (value)); break; case PROP_ROTATION_ANGLE_Y: clutter_actor_set_rotation_internal (actor, CLUTTER_Y_AXIS, g_value_get_double (value)); break; case PROP_ROTATION_ANGLE_Z: clutter_actor_set_rotation_internal (actor, CLUTTER_Z_AXIS, g_value_get_double (value)); break; case PROP_ROTATION_CENTER_X: { const ClutterVertex *center; if ((center = g_value_get_boxed (value))) clutter_actor_set_rotation (actor, CLUTTER_X_AXIS, priv->rxang, center->x, center->y, center->z); } break; case PROP_ROTATION_CENTER_Y: { const ClutterVertex *center; if ((center = g_value_get_boxed (value))) clutter_actor_set_rotation (actor, CLUTTER_Y_AXIS, priv->ryang, center->x, center->y, center->z); } break; case PROP_ROTATION_CENTER_Z: { const ClutterVertex *center; if ((center = g_value_get_boxed (value))) clutter_actor_set_rotation (actor, CLUTTER_Z_AXIS, priv->rzang, center->x, center->y, center->z); } break; case PROP_ROTATION_CENTER_Z_GRAVITY: clutter_actor_set_z_rotation_from_gravity (actor, priv->rzang, g_value_get_enum (value)); break; case PROP_ANCHOR_X: { gint anchor_x = g_value_get_int (value); gfloat anchor_y; clutter_anchor_coord_get_units (actor, &priv->anchor, NULL, &anchor_y, NULL); clutter_actor_set_anchor_point (actor, anchor_x, anchor_y); } break; case PROP_ANCHOR_Y: { gint anchor_y = g_value_get_int (value); gfloat anchor_x; clutter_anchor_coord_get_units (actor, &priv->anchor, &anchor_x, NULL, NULL); clutter_actor_set_anchor_point (actor, anchor_x, anchor_y); } break; case PROP_ANCHOR_GRAVITY: clutter_actor_set_anchor_point_from_gravity (actor, g_value_get_enum (value)); break; case PROP_SHOW_ON_SET_PARENT: priv->show_on_set_parent = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void clutter_actor_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { ClutterActor *actor; ClutterActorPrivate *priv; actor = CLUTTER_ACTOR(object); priv = actor->priv; switch (prop_id) { case PROP_X: g_value_set_int (value, clutter_actor_get_x (actor)); break; case PROP_Y: g_value_set_int (value, clutter_actor_get_y (actor)); break; case PROP_WIDTH: g_value_set_int (value, clutter_actor_get_width (actor)); break; case PROP_HEIGHT: g_value_set_int (value, clutter_actor_get_height (actor)); break; case PROP_FIXED_X: clutter_value_set_unit (value, priv->fixed_x); break; case PROP_FIXED_Y: clutter_value_set_unit (value, priv->fixed_y); break; case PROP_FIXED_POSITION_SET: g_value_set_boolean (value, priv->position_set); break; case PROP_MIN_WIDTH: clutter_value_set_unit (value, priv->request_min_width); break; case PROP_MIN_HEIGHT: clutter_value_set_unit (value, priv->request_min_height); break; case PROP_NATURAL_WIDTH: clutter_value_set_unit (value, priv->request_natural_width); break; case PROP_NATURAL_HEIGHT: clutter_value_set_unit (value, priv->request_natural_height); break; case PROP_MIN_WIDTH_SET: g_value_set_boolean (value, priv->min_width_set); break; case PROP_MIN_HEIGHT_SET: g_value_set_boolean (value, priv->min_height_set); break; case PROP_NATURAL_WIDTH_SET: g_value_set_boolean (value, priv->natural_width_set); break; case PROP_NATURAL_HEIGHT_SET: g_value_set_boolean (value, priv->natural_height_set); break; case PROP_REQUEST_MODE: g_value_set_enum (value, priv->request_mode); break; case PROP_ALLOCATION: g_value_set_boxed (value, &priv->allocation); break; case PROP_DEPTH: g_value_set_int (value, clutter_actor_get_depth (actor)); break; case PROP_OPACITY: g_value_set_uchar (value, priv->opacity); break; case PROP_NAME: g_value_set_string (value, priv->name); break; case PROP_VISIBLE: g_value_set_boolean (value, CLUTTER_ACTOR_IS_VISIBLE (actor)); break; case PROP_MAPPED: g_value_set_boolean (value, CLUTTER_ACTOR_IS_MAPPED (actor)); break; case PROP_REALIZED: g_value_set_boolean (value, CLUTTER_ACTOR_IS_REALIZED (actor)); break; case PROP_HAS_CLIP: g_value_set_boolean (value, priv->has_clip); break; case PROP_CLIP: { ClutterGeometry clip = { 0, }; clip.x = priv->clip[0]; clip.y = priv->clip[1]; clip.width = priv->clip[2]; clip.height = priv->clip[3]; g_value_set_boxed (value, &clip); } break; case PROP_CLIP_TO_ALLOCATION: g_value_set_boolean (value, priv->clip_to_allocation); break; case PROP_SCALE_X: g_value_set_double (value, priv->scale_x); break; case PROP_SCALE_Y: g_value_set_double (value, priv->scale_y); break; case PROP_SCALE_CENTER_X: { gfloat center; clutter_actor_get_scale_center (actor, ¢er, NULL); g_value_set_int (value, center); } break; case PROP_SCALE_CENTER_Y: { gfloat center; clutter_actor_get_scale_center (actor, NULL, ¢er); g_value_set_int (value, center); } break; case PROP_SCALE_GRAVITY: g_value_set_enum (value, clutter_actor_get_scale_gravity (actor)); break; case PROP_REACTIVE: g_value_set_boolean (value, clutter_actor_get_reactive (actor)); break; case PROP_ROTATION_ANGLE_X: g_value_set_double (value, priv->rxang); break; case PROP_ROTATION_ANGLE_Y: g_value_set_double (value, priv->ryang); break; case PROP_ROTATION_ANGLE_Z: g_value_set_double (value, priv->rzang); break; case PROP_ROTATION_CENTER_X: { ClutterVertex center; clutter_actor_get_rotation (actor, CLUTTER_X_AXIS, ¢er.x, ¢er.y, ¢er.z); g_value_set_boxed (value, ¢er); } break; case PROP_ROTATION_CENTER_Y: { ClutterVertex center; clutter_actor_get_rotation (actor, CLUTTER_Y_AXIS, ¢er.x, ¢er.y, ¢er.z); g_value_set_boxed (value, ¢er); } break; case PROP_ROTATION_CENTER_Z: { ClutterVertex center; clutter_actor_get_rotation (actor, CLUTTER_Z_AXIS, ¢er.x, ¢er.y, ¢er.z); g_value_set_boxed (value, ¢er); } break; case PROP_ROTATION_CENTER_Z_GRAVITY: g_value_set_enum (value, clutter_actor_get_z_rotation_gravity (actor)); break; case PROP_ANCHOR_X: { gfloat anchor_x; clutter_anchor_coord_get_units (actor, &priv->anchor, &anchor_x, NULL, NULL); g_value_set_int (value, anchor_x); } break; case PROP_ANCHOR_Y: { gfloat anchor_y; clutter_anchor_coord_get_units (actor, &priv->anchor, NULL, &anchor_y, NULL); g_value_set_int (value, anchor_y); } break; case PROP_ANCHOR_GRAVITY: g_value_set_enum (value, clutter_actor_get_anchor_point_gravity (actor)); break; case PROP_SHOW_ON_SET_PARENT: g_value_set_boolean (value, priv->show_on_set_parent); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void clutter_actor_dispose (GObject *object) { ClutterActor *self = CLUTTER_ACTOR (object); ClutterActorPrivate *priv = self->priv; CLUTTER_NOTE (MISC, "Disposing of object (id=%d) of type '%s' (ref_count:%d)", self->priv->id, g_type_name (G_OBJECT_TYPE (self)), object->ref_count); /* avoid recursing when called from clutter_actor_destroy() */ if (priv->parent_actor) { ClutterActor *parent = priv->parent_actor; if (CLUTTER_IS_CONTAINER (parent)) clutter_container_remove_actor (CLUTTER_CONTAINER (parent), self); else priv->parent_actor = NULL; } /* parent should be gone */ g_assert (priv->parent_actor == NULL); if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL)) { /* can't be mapped or realized with no parent */ g_assert (!CLUTTER_ACTOR_IS_MAPPED (self)); g_assert (!CLUTTER_ACTOR_IS_REALIZED (self)); } destroy_shader_data (self); if (priv->pango_context) { g_object_unref (priv->pango_context); priv->pango_context = NULL; } g_signal_emit (self, actor_signals[DESTROY], 0); G_OBJECT_CLASS (clutter_actor_parent_class)->dispose (object); } static void clutter_actor_finalize (GObject *object) { ClutterActor *actor = CLUTTER_ACTOR (object); CLUTTER_NOTE (MISC, "Finalize object (id=%d) of type '%s'", actor->priv->id, g_type_name (G_OBJECT_TYPE (actor))); g_free (actor->priv->name); clutter_id_pool_remove (CLUTTER_CONTEXT()->id_pool, actor->priv->id); G_OBJECT_CLASS (clutter_actor_parent_class)->finalize (object); } static void clutter_actor_class_init (ClutterActorClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GParamSpec *pspec; object_class->set_property = clutter_actor_set_property; object_class->get_property = clutter_actor_get_property; object_class->dispose = clutter_actor_dispose; object_class->finalize = clutter_actor_finalize; g_type_class_add_private (klass, sizeof (ClutterActorPrivate)); /** * ClutterActor:x: * * X coordinate of the actor in pixels. If written, forces a fixed * position for the actor. If read, returns the fixed position if any, * otherwise the allocation if available, otherwise 0. */ pspec = g_param_spec_int ("x", "X coordinate", "X coordinate of the actor", -G_MAXINT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_X, pspec); /** * ClutterActor:y: * * Y coordinate of the actor in pixels. If written, forces a fixed * position for the actor. If read, returns the fixed position if * any, otherwise the allocation if available, otherwise 0. */ pspec = g_param_spec_int ("y", "Y coordinate", "Y coordinate of the actor", -G_MAXINT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_Y, pspec); /** * ClutterActor:width: * * Width of the actor (in pixels). If written, forces the minimum and * natural size request of the actor to the given width. If read, returns * the allocated width if available, otherwise the width request. */ pspec = g_param_spec_int ("width", "Width", "Width of the actor", 0, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_WIDTH, pspec); /** * ClutterActor:height: * * Height of the actor (in pixels). If written, forces the minimum and * natural size request of the actor to the given height. If read, returns * the allocated height if available, otherwise the height request. */ pspec = g_param_spec_int ("height", "Height", "Height of the actor", 0, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_HEIGHT, pspec); /** * ClutterActor:fixed-x: * * The fixed X position of the actor in pixels. * * Writing this property sets #ClutterActor:fixed-position-set * property as well, as a side effect * * Since: 0.8 */ pspec = clutter_param_spec_unit ("fixed-x", "Fixed X", "Forced X position of the actor", CLUTTER_MINUNIT, CLUTTER_MAXUNIT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_FIXED_X, pspec); /** * ClutterActor:fixed-y: * * The fixed Y position of the actor in pixels. * * Writing this property sets the #ClutterActor:fixed-position-set * property as well, as a side effect * * Since: 0.8 */ pspec = clutter_param_spec_unit ("fixed-y", "Fixed Y", "Forced Y position of the actor", CLUTTER_MINUNIT, CLUTTER_MAXUNIT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_FIXED_Y, pspec); /** * ClutterActor:fixed-position-set: * * This flag controls whether the #ClutterActor:fixed-x and * #ClutterActor:fixed-y properties are used * * Since: 0.8 */ pspec = g_param_spec_boolean ("fixed-position-set", "Fixed position set", "Whether to use fixed positioning " "for the actor", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_FIXED_POSITION_SET, pspec); /** * ClutterActor:min-width: * * A forced minimum width request for the actor, in pixels * * Writing this property sets the #ClutterActor:min-width-set property * as well, as a side effect. * *This property overrides the usual width request of the actor. * * Since: 0.8 */ pspec = clutter_param_spec_unit ("min-width", "Min Width", "Forced minimum width request " "for the actor", 0, CLUTTER_MAXUNIT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_MIN_WIDTH, pspec); /** * ClutterActor:min-height: * * A forced minimum height request for the actor, in pixels * * Writing this property sets the #ClutterActor:min-height-set property * as well, as a side effect. This property overrides the usual height * request of the actor. * * Since: 0.8 */ pspec = clutter_param_spec_unit ("min-height", "Min Height", "Forced minimum height request " "for the actor", 0, CLUTTER_MAXUNIT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_MIN_HEIGHT, pspec); /** * ClutterActor:natural-width: * * A forced natural width request for the actor, in pixels * * Writing this property sets the #ClutterActor:natural-width-set * property as well, as a side effect. This property overrides the * usual width request of the actor * * Since: 0.8 */ pspec = clutter_param_spec_unit ("natural-width", "Natural Width", "Forced natural width request " "for the actor", 0, CLUTTER_MAXUNIT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_NATURAL_WIDTH, pspec); /** * ClutterActor:natural-height: * * A forced natural height request for the actor, in pixels * * Writing this property sets the #ClutterActor:natural-height-set * property as well, as a side effect. This property overrides the * usual height request of the actor * * Since: 0.8 */ pspec = clutter_param_spec_unit ("natural-height", "Natural Height", "Forced natural height request " "for the actor", 0, CLUTTER_MAXUNIT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_NATURAL_HEIGHT, pspec); /** * ClutterActor:min-width-set: * * This flag controls whether the #ClutterActor:min-width property * is used * * Since: 0.8 */ pspec = g_param_spec_boolean ("min-width-set", "Minimum width set", "Whether to use the min-width property", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_MIN_WIDTH_SET, pspec); /** * ClutterActor:min-height-set: * * This flag controls whether the #ClutterActor:min-height property * is used * * Since: 0.8 */ pspec = g_param_spec_boolean ("min-height-set", "Minimum height set", "Whether to use the min-height property", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_MIN_HEIGHT_SET, pspec); /** * ClutterActor:natural-width-set: * * This flag controls whether the #ClutterActor:natural-width property * is used * * Since: 0.8 */ pspec = g_param_spec_boolean ("natural-width-set", "Natural width set", "Whether to use the natural-width property", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_NATURAL_WIDTH_SET, pspec); /** * ClutterActor:natural-height-set: * * This flag controls whether the #ClutterActor:natural-height property * is used * * Since: 0.8 */ pspec = g_param_spec_boolean ("natural-height-set", "Natural height set", "Whether to use the natural-height property", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_NATURAL_HEIGHT_SET, pspec); /** * ClutterActor:allocation: * * The allocation for the actor, in pixels * * This is property is read-only, but you might monitor it to know when an * actor moves or resizes * * Since: 0.8 */ pspec = g_param_spec_boxed ("allocation", "Allocation", "The actor's allocation", CLUTTER_TYPE_ACTOR_BOX, CLUTTER_PARAM_READABLE); g_object_class_install_property (object_class, PROP_ALLOCATION, pspec); /** * ClutterActor:request-mode: * * Request mode for the #ClutterActor. The request mode determines the * type of geometry management used by the actor, either height for width * (the default) or width for height. * * For actors implementing height for width, the parent container should get * the preferred width first, and then the preferred height for that width. * * For actors implementing width for height, the parent container should get * the preferred height first, and then the preferred width for that height. * * For instance: * * |[ * ClutterRequestMode mode; * gfloat natural_width, min_width; * gfloat natural_height, min_height; * * g_object_get (G_OBJECT (child), "request-mode", &mode, NULL); * if (mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH) * { * clutter_actor_get_preferred_width (child, -1, * &min_width, * &natural_width); * clutter_actor_get_preferred_height (child, natural_width, * &min_height, * &natural_height); * } * else * { * clutter_actor_get_preferred_height (child, -1, * &min_height, * &natural_height); * clutter_actor_get_preferred_width (child, natural_height, * &min_width, * &natural_width); * } * ]| * * will retrieve the minimum and natural width and height depending on the * preferred request mode of the #ClutterActor "child". * * The clutter_actor_get_preferred_size() function will implement this * check for you. * * Since: 0.8 */ pspec = g_param_spec_enum ("request-mode", "Request Mode", "The actor's request mode", CLUTTER_TYPE_REQUEST_MODE, CLUTTER_REQUEST_HEIGHT_FOR_WIDTH, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_REQUEST_MODE, pspec); /** * ClutterActor:depth: * * Depth of the actor. * * Since: 0.6 */ pspec = g_param_spec_int ("depth", "Depth", "Depth of actor", -G_MAXINT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_DEPTH, pspec); /** * ClutterActor:opacity: * * Opacity of the actor, between 0 (fully transparent) and * 255 (fully opaque) */ pspec = g_param_spec_uchar ("opacity", "Opacity", "Opacity of actor", 0, 0xff, 0xff, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_OPACITY, pspec); /** * ClutterActor:visible: * * Whether the actor is set to be visible or not * * See also #ClutterActor:mapped */ pspec = g_param_spec_boolean ("visible", "Visible", "Whether the actor is visible or not", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_VISIBLE, pspec); /** * ClutterActor:mapped: * * Whether the actor is mapped (will be painted when the stage * to which it belongs is mapped) * * Since: 1.0 */ pspec = g_param_spec_boolean ("mapped", "Mapped", "Whether the actor will be painted", FALSE, CLUTTER_PARAM_READABLE); g_object_class_install_property (object_class, PROP_MAPPED, pspec); /** * ClutterActor:realized: * * Whether the actor has been realized * * Since: 1.0 */ pspec = g_param_spec_boolean ("realized", "Realized", "Whether the actor has been realized", FALSE, CLUTTER_PARAM_READABLE); g_object_class_install_property (object_class, PROP_REALIZED, pspec); /** * ClutterActor:reactive: * * Whether the actor is reactive to events or not * * Only reactive actors will emit event-related signals * * Since: 0.6 */ pspec = g_param_spec_boolean ("reactive", "Reactive", "Whether the actor is reactive to events", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_REACTIVE, pspec); /** * ClutterActor:has-clip: * * Whether the actor has the #ClutterActor:clip property set or not */ pspec = g_param_spec_boolean ("has-clip", "Has Clip", "Whether the actor has a clip set", FALSE, CLUTTER_PARAM_READABLE); g_object_class_install_property (object_class, PROP_HAS_CLIP, pspec); /** * ClutterActor:clip: * * The clip region for the actor, in actor-relative coordinates * * Every part of the actor outside the clip region will not be * painted */ pspec = g_param_spec_boxed ("clip", "Clip", "The clip region for the actor", CLUTTER_TYPE_GEOMETRY, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_CLIP, pspec); /** * ClutterActor:name: * * The name of the actor * * Since: 0.2 */ pspec = g_param_spec_string ("name", "Name", "Name of the actor", NULL, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_NAME, pspec); /** * ClutterActor:scale-x: * * The horizontal scale of the actor * * Since: 0.6 */ pspec = g_param_spec_double ("scale-x", "Scale X", "Scale factor on the X axis", 0.0, G_MAXDOUBLE, 1.0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SCALE_X, pspec); /** * ClutterActor:scale-y: * * The vertical scale of the actor * * Since: 0.6 */ pspec = g_param_spec_double ("scale-y", "Scale Y", "Scale factor on the Y axis", 0.0, G_MAXDOUBLE, 1.0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SCALE_Y, pspec); /** * ClutterActor:scale-center-x: * * The horizontal center point for scaling * * Since: 1.0 */ pspec = g_param_spec_int ("scale-center-x", "Scale-Center-X", "Horizontal scale center", G_MININT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SCALE_CENTER_X, pspec); /** * ClutterActor:scale-center-y: * * The vertical center point for scaling * * Since: 1.0 */ pspec = g_param_spec_int ("scale-center-y", "Scale-Center-Y", "Vertical scale center", G_MININT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SCALE_CENTER_Y, pspec); /** * ClutterActor:scale-gravity: * * The center point for scaling expressed as a #ClutterGravity * * Since: 1.0 */ pspec = g_param_spec_enum ("scale-gravity", "Scale-Gravity", "The center of scaling", CLUTTER_TYPE_GRAVITY, CLUTTER_GRAVITY_NONE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SCALE_GRAVITY, pspec); /** * ClutterActor:rotation-angle-x: * * The rotation angle on the X axis * * Since: 0.6 */ pspec = g_param_spec_double ("rotation-angle-x", "Rotation Angle X", "The rotation angle on the X axis", -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_ANGLE_X, pspec); /** * ClutterActor:rotation-angle-y: * * The rotation angle on the Y axis * * Since: 0.6 */ pspec = g_param_spec_double ("rotation-angle-y", "Rotation Angle Y", "The rotation angle on the Y axis", -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_ANGLE_Y, pspec); /** * ClutterActor:rotation-angle-z: * * The rotation angle on the Z axis * * Since: 0.6 */ pspec = g_param_spec_double ("rotation-angle-z", "Rotation Angle Z", "The rotation angle on the Z axis", -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_ANGLE_Z, pspec); /** * ClutterActor:rotation-center-x: * * The rotation center on the X axis. * * Since: 0.6 */ pspec = g_param_spec_boxed ("rotation-center-x", "Rotation Center X", "The rotation center on the X axis", CLUTTER_TYPE_VERTEX, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_CENTER_X, pspec); /** * ClutterActor:rotation-center-y: * * The rotation center on the Y axis. * * Since: 0.6 */ pspec = g_param_spec_boxed ("rotation-center-y", "Rotation Center Y", "The rotation center on the Y axis", CLUTTER_TYPE_VERTEX, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_CENTER_Y, pspec); /** * ClutterActor:rotation-center-z: * * The rotation center on the Z axis. * * Since: 0.6 */ pspec = g_param_spec_boxed ("rotation-center-z", "Rotation Center Z", "The rotation center on the Z axis", CLUTTER_TYPE_VERTEX, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_CENTER_Z, pspec); /** * ClutterActor:rotation-center-z-gravity: * * The rotation center on the Z axis expressed as a #ClutterGravity. * * Since: 1.0 */ pspec = g_param_spec_enum ("rotation-center-z-gravity", "Rotation-Center-Z-Gravity", "Center point for rotation around the Z axis", CLUTTER_TYPE_GRAVITY, CLUTTER_GRAVITY_NONE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ROTATION_CENTER_Z_GRAVITY, pspec); /** * ClutterActor:anchor-x: * * The X coordinate of an actor's anchor point, relative to * the actor coordinate space, in pixels * * Since: 0.8 */ pspec = g_param_spec_int ("anchor-x", "Anchor X", "X coordinate of the anchor point", -G_MAXINT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ANCHOR_X, pspec); /** * ClutterActor:anchor-y: * * The Y coordinate of an actor's anchor point, relative to * the actor coordinate space, in pixels * * Since: 0.8 */ pspec = g_param_spec_int ("anchor-y", "Anchor Y", "Y coordinate of the anchor point", -G_MAXINT, G_MAXINT, 0, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ANCHOR_Y, pspec); /** * ClutterActor:anchor-gravity: * * The anchor point expressed as a #ClutterGravity * * Since: 1.0 */ pspec = g_param_spec_enum ("anchor-gravity", "Anchor-Gravity", "The anchor point as a ClutterGravity", CLUTTER_TYPE_GRAVITY, CLUTTER_GRAVITY_NONE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_ANCHOR_GRAVITY, pspec); /** * ClutterActor:show-on-set-parent: * * If %TRUE, the actor is automatically shown when parented. * * Calling clutter_actor_hide() on an actor which has not been * parented will set this property to %FALSE as a side effect. * * Since: 0.8 */ pspec = g_param_spec_boolean ("show-on-set-parent", "Show on set parent", "Whether the actor is shown when parented", TRUE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SHOW_ON_SET_PARENT, pspec); /** * ClutterActor:clip-to-allocation: * * Whether the clip region should track the allocated area * of the actor. * * This property is ignored if a clip area has been explicitly * set using clutter_actor_set_clip(). * * Since: 1.0 */ pspec = g_param_spec_boolean ("clip-to-allocation", "Clip to Allocation", "Sets the clip region to track the " "actor's allocation", FALSE, CLUTTER_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_CLIP_TO_ALLOCATION, pspec); /** * ClutterActor::destroy: * @actor: the object which received the signal * * The ::destroy signal is emitted when an actor is destroyed, * either by direct invocation of clutter_actor_destroy() or * when the #ClutterGroup that contains the actor is destroyed. * * Since: 0.2 */ actor_signals[DESTROY] = g_signal_new (I_("destroy"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS, G_STRUCT_OFFSET (ClutterActorClass, destroy), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::show: * @actor: the object which received the signal * * The ::show signal is emitted when an actor is visible and * rendered on the stage. * * Since: 0.2 */ actor_signals[SHOW] = g_signal_new (I_("show"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (ClutterActorClass, show), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::hide: * @actor: the object which received the signal * * The ::hide signal is emitted when an actor is no longer rendered * on the stage. * * Since: 0.2 */ actor_signals[HIDE] = g_signal_new (I_("hide"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (ClutterActorClass, hide), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::parent-set: * @actor: the object which received the signal * @old_parent: the previous parent of the actor, or %NULL * * This signal is emitted when the parent of the actor changes. * * Since: 0.2 */ actor_signals[PARENT_SET] = g_signal_new (I_("parent-set"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, parent_set), NULL, NULL, clutter_marshal_VOID__OBJECT, G_TYPE_NONE, 1, CLUTTER_TYPE_ACTOR); /** * ClutterActor::queue-redraw: * @actor: the actor we're bubbling the redraw request through * @origin: the actor which initiated the redraw request * * The ::queue_redraw signal is emitted when clutter_actor_queue_redraw() * is called on @origin. * * The default implementation for #ClutterActor chains up to the * parent actor and queues a redraw on the parent, thus "bubbling" * the redraw queue up through the actor graph. The default * implementation for #ClutterStage queues a clutter_redraw() in a * main loop idle handler. * * Note that the @origin actor may be the stage, or a container; it * does not have to be a leaf node in the actor graph. * * Toolkits embedding a #ClutterStage which require a redraw and * relayout cycle can stop the emission of this signal using the * GSignal API, redraw the UI and then call clutter_redraw() * themselves, like: * * |[ * static void * on_redraw_complete (void) * { * /* execute the Clutter drawing pipeline */ * clutter_redraw (); * } * * static void * on_stage_queue_redraw (ClutterStage *stage) * { * /* this prevents the default handler to run */ * g_signal_stop_emission_by_name (stage, "queue-redraw"); * * /* queue a redraw with the host toolkit and call * * a function when the redraw has been completed * */ * queue_a_redraw (G_CALLBACK (on_redraw_complete)); * } * ]| * * This signal is emitted before the Clutter paint * pipeline is executed. If you want to know when the pipeline has * been completed you should connect to the ::paint signal on the * Stage with g_signal_connect_after(). * * Since: 1.0 */ actor_signals[QUEUE_REDRAW] = g_signal_new (I_("queue-redraw"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, queue_redraw), NULL, NULL, clutter_marshal_VOID__OBJECT, G_TYPE_NONE, 1, CLUTTER_TYPE_ACTOR); /** * ClutterActor::event: * @actor: the actor which received the event * @event: a #ClutterEvent * * The ::event signal is emitted each time an event is received * by the @actor. This signal will be emitted on every actor, * following the hierarchy chain, until it reaches the top-level * container (the #ClutterStage). * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[EVENT] = g_signal_new (I_("event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::button-press-event: * @actor: the actor which received the event * @event: a #ClutterButtonEvent * * The ::button-press-event signal is emitted each time a mouse button * is pressed on @actor. * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[BUTTON_PRESS_EVENT] = g_signal_new (I_("button-press-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, button_press_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::button-release-event: * @actor: the actor which received the event * @event: a #ClutterButtonEvent * * The ::button-release-event signal is emitted each time a mouse button * is released on @actor. * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[BUTTON_RELEASE_EVENT] = g_signal_new (I_("button-release-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, button_release_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::scroll-event: * @actor: the actor which received the event * @event: a #ClutterScrollEvent * * The ::scroll-event signal is emitted each time the mouse is * scrolled on @actor * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[SCROLL_EVENT] = g_signal_new (I_("scroll-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, scroll_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::key-press-event: * @actor: the actor which received the event * @event: a #ClutterKeyEvent * * The ::key-press-event signal is emitted each time a keyboard button * is pressed while @actor has key focus (see clutter_stage_set_key_focus()). * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[KEY_PRESS_EVENT] = g_signal_new (I_("key-press-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, key_press_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::key-release-event: * @actor: the actor which received the event * @event: a #ClutterKeyEvent * * The ::key-release-event signal is emitted each time a keyboard button * is released while @actor has key focus (see * clutter_stage_set_key_focus()). * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[KEY_RELEASE_EVENT] = g_signal_new (I_("key-release-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, key_release_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::motion-event: * @actor: the actor which received the event * @event: a #ClutterMotionEvent * * The ::motion-event signal is emitted each time the mouse pointer is * moved over @actor. * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[MOTION_EVENT] = g_signal_new (I_("motion-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, motion_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::key-focus-in: * @actor: the actor which now has key focus * * The ::focus-in signal is emitted when @actor recieves key focus. * * Since: 0.6 */ actor_signals[KEY_FOCUS_IN] = g_signal_new (I_("key-focus-in"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, key_focus_in), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::key-focus-out: * @actor: the actor which now has key focus * * The ::key-focus-out signal is emitted when @actor loses key focus. * * Since: 0.6 */ actor_signals[KEY_FOCUS_OUT] = g_signal_new (I_("key-focus-out"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, key_focus_out), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::enter-event: * @actor: the actor which the pointer has entered. * @event: a #ClutterCrossingEvent * * The ::enter-event signal is emitted when the pointer enters the @actor * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[ENTER_EVENT] = g_signal_new (I_("enter-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, enter_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::leave-event: * @actor: the actor which the pointer has left * @event: a #ClutterCrossingEvent * * The ::leave-event signal is emitted when the pointer leaves the @actor. * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[LEAVE_EVENT] = g_signal_new (I_("leave-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, leave_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::captured-event: * @actor: the actor which received the signal * @event: a #ClutterEvent * * The ::captured-event signal is emitted when an event is captured * by Clutter. This signal will be emitted starting from the top-level * container (the #ClutterStage) to the actor which received the event * going down the hierarchy. This signal can be used to intercept every * event before the specialized events (like * ClutterActor::button-press-event or ::key-released-event) are * emitted. * * Return value: %TRUE if the event has been handled by the actor, * or %FALSE to continue the emission. * * Since: 0.6 */ actor_signals[CAPTURED_EVENT] = g_signal_new (I_("captured-event"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, captured_event), _clutter_boolean_handled_accumulator, NULL, clutter_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, CLUTTER_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * ClutterActor::paint: * @actor: the #ClutterActor that received the signal * * The ::paint signal is emitted each time an actor is being painted. * * Subclasses of #ClutterActor should override the class signal handler * and paint themselves in that function. * * It is possible to connect a handler to the ::paint signal in order * to set up some custom aspect of a paint. * * Since: 0.8 */ actor_signals[PAINT] = g_signal_new (I_("paint"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, paint), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::realize: * @actor: the #ClutterActor that received the signal * * The ::realize signal is emitted each time an actor is being * realized. * * Since: 0.8 */ actor_signals[REALIZE] = g_signal_new (I_("realize"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, realize), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::unrealize: * @actor: the #ClutterActor that received the signal * * The ::unrealize signal is emitted each time an actor is being * unrealized. * * Since: 0.8 */ actor_signals[UNREALIZE] = g_signal_new (I_("unrealize"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, unrealize), NULL, NULL, clutter_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * ClutterActor::map: * @actor: the #ClutterActor to map * * The ::map virtual functon must be overridden in order to call * clutter_actor_map() on any child actors if the actor is not a * #ClutterContainer. When overriding, it is mandatory to chain up * to the parent implementation. * * Since: 1.0 */ /** * ClutterActor::unmap: * @actor: the #ClutterActor to unmap * * The ::unmap virtual functon must be overridden in order to call * clutter_actor_unmap() on any child actors if the actor is not a * #ClutterContainer. When overriding, it is mandatory to chain up * to the parent implementation. * * Since: 1.0 */ /** * ClutterActor::pick: * @actor: the #ClutterActor that received the signal * @color: the #ClutterColor to be used when picking * * The ::pick signal is emitted each time an actor is being painted * in "pick mode". The pick mode is used to identify the actor during * the event handling phase, or by clutter_stage_get_actor_at_pos(). * The actor should paint its shape using the passed @pick_color. * * Subclasses of #ClutterActor should override the class signal handler * and paint themselves in that function. * * It is possible to connect a handler to the ::pick signal in order * to set up some custom aspect of a paint in pick mode. * * Since: 1.0 */ actor_signals[PICK] = g_signal_new (I_("pick"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (ClutterActorClass, pick), NULL, NULL, clutter_marshal_VOID__BOXED, G_TYPE_NONE, 1, CLUTTER_TYPE_COLOR); klass->show = clutter_actor_real_show; klass->show_all = clutter_actor_show; klass->hide = clutter_actor_real_hide; klass->hide_all = clutter_actor_hide; klass->map = clutter_actor_real_map; klass->unmap = clutter_actor_real_unmap; klass->unrealize = clutter_actor_real_unrealize; klass->pick = clutter_actor_real_pick; klass->get_preferred_width = clutter_actor_real_get_preferred_width; klass->get_preferred_height = clutter_actor_real_get_preferred_height; klass->allocate = clutter_actor_real_allocate; klass->queue_redraw = clutter_actor_real_queue_redraw; } static void clutter_actor_init (ClutterActor *self) { ClutterActorPrivate *priv; self->priv = priv = CLUTTER_ACTOR_GET_PRIVATE (self); priv->parent_actor = NULL; priv->has_clip = FALSE; priv->opacity = 0xff; priv->id = clutter_id_pool_add (CLUTTER_CONTEXT()->id_pool, self); priv->scale_x = 1.0; priv->scale_y = 1.0; priv->shader_data = NULL; priv->show_on_set_parent = TRUE; priv->needs_width_request = TRUE; priv->needs_height_request = TRUE; priv->needs_allocation = TRUE; priv->opacity_parent = NULL; priv->enable_model_view_transform = TRUE; memset (priv->clip, 0, sizeof (gfloat) * 4); } /** * clutter_actor_destroy: * @self: a #ClutterActor * * Destroys an actor. When an actor is destroyed, it will break any * references it holds to other objects. If the actor is inside a * container, the actor will be removed. * * When you destroy a container, its children will be destroyed as well. * * Note: you cannot destroy the #ClutterStage returned by * clutter_stage_get_default(). */ void clutter_actor_destroy (ClutterActor *self) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; g_object_ref (self); /* avoid recursion while destroying */ if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_DESTRUCTION)) { CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_DESTRUCTION); g_object_run_dispose (G_OBJECT (self)); CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_DESTRUCTION); } g_object_unref (self); } /** * clutter_actor_queue_redraw: * @self: A #ClutterActor * * Queues up a redraw of an actor and any children. The redraw occurs * once the main loop becomes idle (after the current batch of events * has been processed, roughly). * * Applications rarely need to call this, as redraws are handled * automatically by modification functions. * * This function will not do anything if @self is not visible, or * if the actor is inside an invisible part of the scenegraph. * * Also be aware that painting is a NOP for actors with an opacity of * 0 */ void clutter_actor_queue_redraw (ClutterActor *self) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); clutter_actor_queue_redraw_with_origin (self, self); } /** * clutter_actor_queue_relayout: * @self: A #ClutterActor * * Indicates that the actor's size request or other layout-affecting * properties may have changed. This function is used inside #ClutterActor * subclass implementations, not by applications directly. * * Queueing a new layout automatically queues a redraw as well. * * Since: 0.8 */ void clutter_actor_queue_relayout (ClutterActor *self) { ClutterActorPrivate *priv; priv = self->priv; if (priv->needs_width_request && priv->needs_height_request && priv->needs_allocation) return; /* save some cpu cycles */ priv->needs_width_request = TRUE; priv->needs_height_request = TRUE; priv->needs_allocation = TRUE; /* always repaint also (no-op if not mapped) */ clutter_actor_queue_redraw (self); /* We need to go all the way up the hierarchy */ if (priv->parent_actor) clutter_actor_queue_relayout (priv->parent_actor); } /** * clutter_actor_get_preferred_size: * @self: a #ClutterActor * @min_width_p: (out) (allow-none): return location for the minimum width, or %NULL * @min_height_p: (out) (allow-none): return location for the minimum height, or %NULL * @natural_width_p: (out) (allow-none): return location for the natural width, or %NULL * @natural_height_p: (out) (allow-none): return location for the natural height, or %NULL * * Computes the preferred minimum and natural size of an actor, taking into * account the actor's geometry management (either height-for-width * or width-for-height). * * The width and height used to compute the preferred height and preferred * width are the actor's natural ones. * * If you need to control the height for the preferred width, or the width for * the preferred height, you should use clutter_actor_get_preferred_width() * and clutter_actor_get_preferred_height(), and check the actor's preferred * geometry management using the #ClutterActor:request-mode property. * * Since: 0.8 */ void clutter_actor_get_preferred_size (ClutterActor *self, gfloat *min_width_p, gfloat *min_height_p, gfloat *natural_width_p, gfloat *natural_height_p) { ClutterActorPrivate *priv; gfloat for_width, for_height; gfloat min_width, min_height; gfloat natural_width, natural_height; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; for_width = for_height = 0; min_width = min_height = 0; natural_width = natural_height = 0; if (priv->request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH) { CLUTTER_NOTE (LAYOUT, "Preferred size (height-for-width)"); clutter_actor_get_preferred_width (self, -1, &min_width, &natural_width); clutter_actor_get_preferred_height (self, natural_width, &min_height, &natural_height); } else { CLUTTER_NOTE (LAYOUT, "Preferred size (width-for-height)"); clutter_actor_get_preferred_height (self, -1, &min_height, &natural_height); clutter_actor_get_preferred_width (self, natural_height, &min_width, &natural_width); } if (min_width_p) *min_width_p = min_width; if (min_height_p) *min_height_p = min_height; if (natural_width_p) *natural_width_p = natural_width; if (natural_height_p) *natural_height_p = natural_height; } #define FLOAT_EPSILON (1e-4) /* 1/1000 pixel is the precision used */ /** * clutter_actor_get_preferred_width: * @self: A #ClutterActor * @for_height: available height when computing the preferred width, * or a negative value to indicate that no height is defined * @min_width_p: (out): return location for minimum width, or %NULL * @natural_width_p: (out): return location for the natural width, or %NULL * * Computes the requested minimum and natural widths for an actor, * optionally depending on the specified height, or if they are * already computed, returns the cached values. * * An actor may not get its request - depending on the layout * manager that's in effect. * * A request should not incorporate the actor's scale or anchor point; * those transformations do not affect layout, only rendering. * * Since: 0.8 */ void clutter_actor_get_preferred_width (ClutterActor *self, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p) { ClutterActorClass *klass; ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); klass = CLUTTER_ACTOR_GET_CLASS (self); priv = self->priv; if (priv->needs_width_request || priv->request_width_for_height != for_height) { gfloat min_width, natural_width; min_width = natural_width = 0; CLUTTER_NOTE (LAYOUT, "Width request for %.2f px", for_height); klass->get_preferred_width (self, for_height, &min_width, &natural_width); if (natural_width < min_width - FLOAT_EPSILON) { g_warning ("Actor of type %s reported a natural width " "of %.2f px lower than min width %.2f px", G_OBJECT_TYPE_NAME (self), natural_width, min_width); } if (!priv->min_width_set) priv->request_min_width = min_width; if (!priv->natural_width_set) priv->request_natural_width = natural_width; priv->request_width_for_height = for_height; priv->needs_width_request = FALSE; } if (min_width_p) *min_width_p = priv->request_min_width; if (natural_width_p) *natural_width_p = priv->request_natural_width; } /** * clutter_actor_get_preferred_height: * @self: A #ClutterActor * @for_width: available width to assume in computing desired height, * or a negative value to indicate that no width is defined * @min_height_p: (out): return location for minimum height, or %NULL * @natural_height_p: (out): return location for natural height, or %NULL * * Computes the requested minimum and natural heights for an actor, * or if they are already computed, returns the cached values. * * An actor may not get its request - depending on the layout * manager that's in effect. * * A request should not incorporate the actor's scale or anchor point; * those transformations do not affect layout, only rendering. * * Since: 0.8 */ void clutter_actor_get_preferred_height (ClutterActor *self, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p) { ClutterActorClass *klass; ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); klass = CLUTTER_ACTOR_GET_CLASS (self); priv = self->priv; if (priv->needs_height_request || priv->request_height_for_width != for_width) { gfloat min_height, natural_height; min_height = natural_height = 0; CLUTTER_NOTE (LAYOUT, "Width request for %.2f px", for_width); klass->get_preferred_height (self, for_width, &min_height, &natural_height); if (natural_height < min_height - FLOAT_EPSILON) { g_warning ("Actor of type %s reported a natural height " "of %.2f px lower than min height %.2f px", G_OBJECT_TYPE_NAME (self), natural_height, min_height); } if (!priv->min_height_set) priv->request_min_height = min_height; if (!priv->natural_height_set) priv->request_natural_height = natural_height; priv->request_height_for_width = for_width; priv->needs_height_request = FALSE; } if (min_height_p) *min_height_p = priv->request_min_height; if (natural_height_p) *natural_height_p = priv->request_natural_height; } /** * clutter_actor_get_allocation_coords: * @self: A #ClutterActor * @x_1: (out): x1 coordinate * @y_1: (out): y1 coordinate * @x_2: (out): x2 coordinate * @y_2: (out): y2 coordinate * * Gets the layout box an actor has been assigned. The allocation can * only be assumed valid inside a paint() method; anywhere else, it * may be out-of-date. * * An allocation does not incorporate the actor's scale or anchor point; * those transformations do not affect layout, only rendering. * * The returned coordinates are in pixels. * * Since: 0.8 */ void clutter_actor_get_allocation_coords (ClutterActor *self, gint *x_1, gint *y_1, gint *x_2, gint *y_2) { ClutterActorBox allocation = { 0, }; g_return_if_fail (CLUTTER_IS_ACTOR (self)); clutter_actor_get_allocation_box (self, &allocation); if (x_1) *x_1 = allocation.x1; if (y_1) *y_1 = allocation.y1; if (x_2) *x_2 = allocation.x2; if (y_2) *y_2 = allocation.y2; } /** * clutter_actor_get_allocation_box: * @self: A #ClutterActor * @box: (out): the function fills this in with the actor's allocation * * Gets the layout box an actor has been assigned. The allocation can * only be assumed valid inside a paint() method; anywhere else, it * may be out-of-date. * * An allocation does not incorporate the actor's scale or anchor point; * those transformations do not affect layout, only rendering. * * Do not call any of the clutter_actor_get_allocation_*() family * of functions inside the implementation of the get_preferred_width() * or get_preferred_height() virtual functions. * * Since: 0.8 */ void clutter_actor_get_allocation_box (ClutterActor *self, ClutterActorBox *box) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); /* XXX - if needs_allocation=TRUE, we can either 1) g_return_if_fail, * which limits calling get_allocation to inside paint() basically; or * we can 2) force a layout, which could be expensive if someone calls * get_allocation somewhere silly; or we can 3) just return the latest * value, allowing it to be out-of-date, and assume people know what * they are doing. * * The least-surprises approach that keeps existing code working is * likely to be 2). People can end up doing some inefficient things, * though, and in general code that requires 2) is probably broken. */ /* this implements 2) */ if (G_UNLIKELY (self->priv->needs_allocation)) { ClutterActor *stage = clutter_actor_get_stage (self); /* do not queue a relayout on an unparented actor */ if (stage) _clutter_stage_maybe_relayout (stage); } /* commenting out the code above and just keeping this assigment * implements 3) */ *box = self->priv->allocation; } /** * clutter_actor_get_allocation_geometry: * @self: A #ClutterActor * @geom: (out): allocation geometry in pixels * * Gets the layout box an actor has been assigned. The allocation can * only be assumed valid inside a paint() method; anywhere else, it * may be out-of-date. * * An allocation does not incorporate the actor's scale or anchor point; * those transformations do not affect layout, only rendering. * * The returned rectangle is in pixels. * * Since: 0.8 */ void clutter_actor_get_allocation_geometry (ClutterActor *self, ClutterGeometry *geom) { gint x2, y2; g_return_if_fail (CLUTTER_IS_ACTOR (self)); clutter_actor_get_allocation_coords (self, &geom->x, &geom->y, &x2, &y2); geom->width = x2 - geom->x; geom->height = y2 - geom->y; } /** * clutter_actor_allocate: * @self: A #ClutterActor * @box: new allocation of the actor, in parent-relative coordinates * @absolute_origin_changed: whether the position of the parent has * changed in stage coordinates * * Called by the parent of an actor to assign the actor its size. * Should never be called by applications (except when implementing * a container or layout manager). * * Actors can know from their allocation box whether they have moved * with respect to their parent actor. The absolute_origin_changed * parameter additionally indicates whether the parent has moved with * respect to the stage, for example because a grandparent's origin * has moved. * * Since: 0.8 */ void clutter_actor_allocate (ClutterActor *self, const ClutterActorBox *box, gboolean absolute_origin_changed) { ClutterActorPrivate *priv; ClutterActorClass *klass; gboolean child_moved; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; klass = CLUTTER_ACTOR_GET_CLASS (self); child_moved = (box->x1 != priv->allocation.x1 || box->y1 != priv->allocation.y1); /* If we get an allocation "out of the blue" * (we did not queue relayout), then we want to * ignore it. But if we have needs_allocation set, * we want to guarantee that allocate() virtual * method is always called, i.e. that queue_relayout() * always results in an allocate() invocation on * an actor. * * The optimization here is to avoid re-allocating * actors that did not queue relayout and were * not moved. */ if (!priv->needs_allocation && !absolute_origin_changed && !child_moved && box->x2 == priv->allocation.x2 && box->y2 == priv->allocation.y2) { CLUTTER_NOTE (LAYOUT, "No allocation needed"); return; } /* When absolute_origin_changed is passed in to * clutter_actor_allocate(), it indicates whether the parent has its * absolute origin moved; when passed in to ClutterActor::allocate() * virtual method though, it indicates whether the child has its * absolute origin moved. So we set it to TRUE if child_moved. */ klass->allocate (self, box, absolute_origin_changed || child_moved); } /** * clutter_actor_set_geometry: * @self: A #ClutterActor * @geometry: A #ClutterGeometry * * Sets the actor's fixed position and forces its minimum and natural * size, in pixels. This means the untransformed actor will have the * given geometry. This is the same as calling clutter_actor_set_position() * and clutter_actor_set_size(). */ void clutter_actor_set_geometry (ClutterActor *self, const ClutterGeometry *geometry) { g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_position (self, geometry->x, geometry->y); clutter_actor_set_size (self, geometry->width, geometry->height); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_get_geometry: * @self: A #ClutterActor * @geometry: (out): A location to store actors #ClutterGeometry * * Gets the size and position of an actor relative to its parent * actor. This is the same as calling clutter_actor_get_position() and * clutter_actor_get_size(). It tries to "do what you mean" and get the * requested size and position if the actor's allocation is invalid. */ void clutter_actor_get_geometry (ClutterActor *self, ClutterGeometry *geometry) { gfloat x, y, width, height; g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (geometry != NULL); clutter_actor_get_position (self, &x, &y); clutter_actor_get_size (self, &width, &height); geometry->x = (int) x; geometry->y = (int) y; geometry->width = (int) width; geometry->height = (int) height; } /** * clutter_actor_set_position * @self: A #ClutterActor * @x: New left position of actor in pixels. * @y: New top position of actor in pixels. * * Sets the actor's fixed position in pixels relative to any parent * actor. * * If a layout manager is in use, this position will override the * layout manager and force a fixed position. */ void clutter_actor_set_position (ClutterActor *self, gfloat x, gfloat y) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_x (self, x); clutter_actor_set_y (self, y); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_get_fixed_position_set: * @self: A #ClutterActor * * Checks whether an actor has a fixed position set (and will thus be * unaffected by any layout manager). * * Return value: %TRUE if the fixed position is set on the actor * * Since: 0.8 */ gboolean clutter_actor_get_fixed_position_set (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); return self->priv->position_set; } /** * clutter_actor_set_fixed_position_set: * @self: A #ClutterActor * @is_set: whether to use fixed position * * Sets whether an actor has a fixed position set (and will thus be * unaffected by any layout manager). * * Since: 0.8 */ void clutter_actor_set_fixed_position_set (ClutterActor *self, gboolean is_set) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (self->priv->position_set == (is_set != FALSE)) return; self->priv->position_set = is_set != FALSE; g_object_notify (G_OBJECT (self), "fixed-position-set"); clutter_actor_queue_relayout (self); } /** * clutter_actor_move_by: * @self: A #ClutterActor * @dx: Distance to move Actor on X axis. * @dy: Distance to move Actor on Y axis. * * Moves an actor by the specified distance relative to its current * position in pixels. * * This function modifies the fixed position of an actor and thus removes * it from any layout management. Another way to move an actor is with an * anchor point, see clutter_actor_set_anchor_point(). * * Since: 0.2 */ void clutter_actor_move_by (ClutterActor *self, gfloat dx, gfloat dy) { ClutterActorPrivate *priv; gfloat x, y; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; x = priv->fixed_x; y = priv->fixed_y; clutter_actor_set_position (self, x + dx, y + dy); } static void clutter_actor_set_min_width (ClutterActor *self, gfloat min_width) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; /* if we are setting the size on a top-level actor and the * backend only supports static top-levels (e.g. framebuffers) * then we ignore the passed value and we override it with * the stage implementation's preferred size. */ if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) && clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC)) return; if (priv->min_width_set && min_width == priv->request_min_width) return; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_store_old_geometry (self, &old); priv->request_min_width = min_width; g_object_notify (G_OBJECT (self), "min-width"); clutter_actor_set_min_width_set (self, TRUE); clutter_actor_notify_if_geometry_changed (self, &old); g_object_thaw_notify (G_OBJECT (self)); clutter_actor_queue_relayout (self); } static void clutter_actor_set_min_height (ClutterActor *self, gfloat min_height) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; /* if we are setting the size on a top-level actor and the * backend only supports static top-levels (e.g. framebuffers) * then we ignore the passed value and we override it with * the stage implementation's preferred size. */ if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) && clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC)) return; if (priv->min_height_set && min_height == priv->request_min_height) return; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_store_old_geometry (self, &old); priv->request_min_height = min_height; g_object_notify (G_OBJECT (self), "min-height"); clutter_actor_set_min_height_set (self, TRUE); clutter_actor_notify_if_geometry_changed (self, &old); g_object_thaw_notify (G_OBJECT (self)); clutter_actor_queue_relayout (self); } static void clutter_actor_set_natural_width (ClutterActor *self, gfloat natural_width) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; /* if we are setting the size on a top-level actor and the * backend only supports static top-levels (e.g. framebuffers) * then we ignore the passed value and we override it with * the stage implementation's preferred size. */ if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) && clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC)) return; if (priv->natural_width_set && natural_width == priv->request_natural_width) return; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_store_old_geometry (self, &old); priv->request_natural_width = natural_width; g_object_notify (G_OBJECT (self), "natural-width"); clutter_actor_set_natural_width_set (self, TRUE); clutter_actor_notify_if_geometry_changed (self, &old); g_object_thaw_notify (G_OBJECT (self)); clutter_actor_queue_relayout (self); } static void clutter_actor_set_natural_height (ClutterActor *self, gfloat natural_height) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; /* if we are setting the size on a top-level actor and the * backend only supports static top-levels (e.g. framebuffers) * then we ignore the passed value and we override it with * the stage implementation's preferred size. */ if ((CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) && clutter_feature_available (CLUTTER_FEATURE_STAGE_STATIC)) return; if (priv->natural_height_set && natural_height == priv->request_natural_height) return; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_store_old_geometry (self, &old); priv->request_natural_height = natural_height; g_object_notify (G_OBJECT (self), "natural-height"); clutter_actor_set_natural_height_set (self, TRUE); clutter_actor_notify_if_geometry_changed (self, &old); g_object_thaw_notify (G_OBJECT (self)); clutter_actor_queue_relayout (self); } static void clutter_actor_set_min_width_set (ClutterActor *self, gboolean use_min_width) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; if (priv->min_width_set == (use_min_width != FALSE)) return; clutter_actor_store_old_geometry (self, &old); priv->min_width_set = use_min_width != FALSE; g_object_notify (G_OBJECT (self), "min-width-set"); clutter_actor_notify_if_geometry_changed (self, &old); clutter_actor_queue_relayout (self); } static void clutter_actor_set_min_height_set (ClutterActor *self, gboolean use_min_height) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; if (priv->min_height_set == (use_min_height != FALSE)) return; clutter_actor_store_old_geometry (self, &old); priv->min_height_set = use_min_height != FALSE; g_object_notify (G_OBJECT (self), "min-height-set"); clutter_actor_notify_if_geometry_changed (self, &old); clutter_actor_queue_relayout (self); } static void clutter_actor_set_natural_width_set (ClutterActor *self, gboolean use_natural_width) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; if (priv->natural_width_set == (use_natural_width != FALSE)) return; clutter_actor_store_old_geometry (self, &old); priv->natural_width_set = use_natural_width != FALSE; g_object_notify (G_OBJECT (self), "natural-width-set"); clutter_actor_notify_if_geometry_changed (self, &old); clutter_actor_queue_relayout (self); } static void clutter_actor_set_natural_height_set (ClutterActor *self, gboolean use_natural_height) { ClutterActorPrivate *priv = self->priv; ClutterActorBox old = { 0, }; if (priv->natural_height_set == (use_natural_height != FALSE)) return; clutter_actor_store_old_geometry (self, &old); priv->natural_height_set = use_natural_height != FALSE; g_object_notify (G_OBJECT (self), "natural-height-set"); clutter_actor_notify_if_geometry_changed (self, &old); clutter_actor_queue_relayout (self); } static void clutter_actor_set_request_mode (ClutterActor *self, ClutterRequestMode mode) { ClutterActorPrivate *priv = self->priv; if (priv->request_mode == mode) return; priv->request_mode = mode; priv->needs_width_request = TRUE; priv->needs_height_request = TRUE; g_object_notify (G_OBJECT (self), "request-mode"); clutter_actor_queue_relayout (self); } /** * clutter_actor_set_size * @self: A #ClutterActor * @width: New width of actor in pixels, or -1 * @height: New height of actor in pixels, or -1 * * Sets the actor's size request in pixels. This overrides any * "normal" size request the actor would have. For example * a text actor might normally request the size of the text; * this function would force a specific size instead. * * If @width and/or @height are -1 the actor will use its * "normal" size request instead of overriding it, i.e. * you can "unset" the size with -1. * * This function sets or unsets both the minimum and natural size. */ void clutter_actor_set_size (ClutterActor *self, gfloat width, gfloat height) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_object_freeze_notify (G_OBJECT (self)); if (width >= 0) { clutter_actor_set_min_width (self, width); clutter_actor_set_natural_width (self, width); } else { clutter_actor_set_min_width_set (self, FALSE); clutter_actor_set_natural_width_set (self, FALSE); } if (height >= 0) { clutter_actor_set_min_height (self, height); clutter_actor_set_natural_height (self, height); } else { clutter_actor_set_min_height_set (self, FALSE); clutter_actor_set_natural_height_set (self, FALSE); } g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_get_size: * @self: A #ClutterActor * @width: return location for the width, or %NULL. * @height: return location for the height, or %NULL. * * This function tries to "do what you mean" and return * the size an actor will have. If the actor has a valid * allocation, the allocation will be returned; otherwise, * the actors natural size request will be returned. * * If you care whether you get the request vs. the allocation, you * should probably call a different function like * clutter_actor_get_allocation_coords() or * clutter_actor_get_preferred_width(). * * Since: 0.2 */ void clutter_actor_get_size (ClutterActor *self, gfloat *width, gfloat *height) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (width) *width = clutter_actor_get_width (self); if (height) *height = clutter_actor_get_height (self); } /** * clutter_actor_get_position: * @self: a #ClutterActor * @x: return location for the X coordinate, or %NULL * @y: return location for the Y coordinate, or %NULL * * This function tries to "do what you mean" and tell you where the * actor is, prior to any transformations. Retrieves the fixed * position of an actor in pixels, if one has been set; otherwise, if * the allocation is valid, returns the actor's allocated position; * otherwise, returns 0,0. * * The returned position is in pixels. * * Since: 0.6 */ void clutter_actor_get_position (ClutterActor *self, gfloat *x, gfloat *y) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (x) *x = clutter_actor_get_x (self); if (y) *y = clutter_actor_get_y (self); } /** * clutter_actor_get_transformed_position: * @self: A #ClutterActor * @x: (out): return location for the X coordinate, or %NULL * @y: (out): return location for the Y coordinate, or %NULL * * Gets the absolute position of an actor, in pixels relative to the stage. * * Since: 0.8 */ void clutter_actor_get_transformed_position (ClutterActor *self, gfloat *x, gfloat *y) { ClutterVertex v1; ClutterVertex v2; v1.x = v1.y = 0; clutter_actor_apply_transform_to_point (self, &v1, &v2); if (x) *x = v2.x; if (y) *y = v2.y; } /** * clutter_actor_get_transformed_size: * @self: A #ClutterActor * @width: (out): return location for the width, or %NULL * @height: (out): return location for the height, or %NULL * * Gets the absolute size of an actor in pixels, taking into account the * scaling factors. * * If the actor has a valid allocation, the allocated size will be used. * If the actor has not a valid allocation then the preferred size will * be transformed and returned. * * If you want the transformed allocation, see * clutter_actor_get_abs_allocation_vertices() instead. * * When the actor (or one of its ancestors) is rotated around the * X or Y axis, it no longer appears as on the stage as a rectangle, but * as a generic quadrangle; in that case this function returns the size * of the smallest rectangle that encapsulates the entire quad. Please * note that in this case no assumptions can be made about the relative * position of this envelope to the absolute position of the actor, as * returned by clutter_actor_get_transformed_position(); if you need this * information, you need to use clutter_actor_get_abs_allocation_vertices() * to get the coords of the actual quadrangle. * * Since: 0.8 */ void clutter_actor_get_transformed_size (ClutterActor *self, gfloat *width, gfloat *height) { ClutterActorPrivate *priv; ClutterVertex v[4]; gfloat x_min, x_max, y_min, y_max; gint i; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; /* if the actor hasn't been allocated yet, get the preferred * size and transform that */ if (priv->needs_allocation) { gfloat natural_width, natural_height; ClutterActorBox box; /* make a fake allocation to transform */ clutter_actor_get_position (self, &box.x1, &box.y1); natural_width = natural_height = 0; clutter_actor_get_preferred_size (self, NULL, NULL, &natural_width, &natural_height); box.x2 = box.x1 + natural_width; box.y2 = box.y1 + natural_height; clutter_actor_transform_and_project_box (self, &box, v); } else clutter_actor_get_abs_allocation_vertices (self, v); x_min = x_max = v[0].x; y_min = y_max = v[0].y; for (i = 1; i < G_N_ELEMENTS (v); ++i) { if (v[i].x < x_min) x_min = v[i].x; if (v[i].x > x_max) x_max = v[i].x; if (v[i].y < y_min) y_min = v[i].y; if (v[i].y > y_max) y_max = v[i].y; } if (width) *width = x_max - x_min; if (height) *height = y_max - y_min; } /** * clutter_actor_get_width: * @self: A #ClutterActor * * Retrieves the width of a #ClutterActor. * * If the actor has a valid allocation, this function will return the * width of the allocated area given to the actor. * * If the actor does not have a valid allocation, this function will * return the actor's natural width, that is the preferred width of * the actor. * * If you care whether you get the preferred width or the width that * has been assigned to the actor, you should probably call a different * function like clutter_actor_get_allocation_coords() to retrieve the * allocated size or clutter_actor_get_preferred_width() to retrieve the * preferred width. * * If an actor has a fixed width, for instance a width that has been * assigned using clutter_actor_set_width(), the width returned will * be the same value. * * Return value: the width of the actor, in pixels */ gfloat clutter_actor_get_width (ClutterActor *self) { ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); priv = self->priv; if (priv->needs_allocation) { gfloat natural_width = 0; if (self->priv->request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH) clutter_actor_get_preferred_width (self, -1, NULL, &natural_width); else { gfloat natural_height = 0; clutter_actor_get_preferred_height (self, -1, NULL, &natural_height); clutter_actor_get_preferred_width (self, natural_height, NULL, &natural_width); } return natural_width; } else return priv->allocation.x2 - priv->allocation.x1; } /** * clutter_actor_get_height: * @self: A #ClutterActor * * Retrieves the height of a #ClutterActor. * * If the actor has a valid allocation, this function will return the * height of the allocated area given to the actor. * * If the actor does not have a valid allocation, this function will * return the actor's natural height, that is the preferred height of * the actor. * * If you care whether you get the preferred height or the height that * has been assigned to the actor, you should probably call a different * function like clutter_actor_get_allocation_coords() to retrieve the * allocated size or clutter_actor_get_preferred_height() to retrieve the * preferred height. * * If an actor has a fixed height, for instance a height that has been * assigned using clutter_actor_set_height(), the height returned will * be the same value. * * Return value: the height of the actor, in pixels */ gfloat clutter_actor_get_height (ClutterActor *self) { ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); priv = self->priv; if (priv->needs_allocation) { gfloat natural_height = 0; if (priv->request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH) { gfloat natural_width = 0; clutter_actor_get_preferred_width (self, -1, NULL, &natural_width); clutter_actor_get_preferred_height (self, natural_width, NULL, &natural_height); } else clutter_actor_get_preferred_height (self, -1, NULL, &natural_height); return natural_height; } else return priv->allocation.y2 - priv->allocation.y1; } /** * clutter_actor_set_width * @self: A #ClutterActor * @width: Requested new width for the actor, in pixels * * Forces a width on an actor, causing the actor's preferred width * and height (if any) to be ignored. * * This function sets both the minimum and natural size of the actor. * * since: 0.2 **/ void clutter_actor_set_width (ClutterActor *self, gfloat width) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_min_width (self, width); clutter_actor_set_natural_width (self, width); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_set_height * @self: A #ClutterActor * @height: Requested new height for the actor, in pixels * * Forces a height on an actor, causing the actor's preferred width * and height (if any) to be ignored. * * This function sets both the minimum and natural size of the actor. * * since: 0.2 **/ void clutter_actor_set_height (ClutterActor *self, gfloat height) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_min_height (self, height); clutter_actor_set_natural_height (self, height); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_set_x: * @self: a #ClutterActor * @x: the actor's position on the X axis * * Sets the actor's X coordinate, relative to its parent, in pixels. * * Overrides any layout manager and forces a fixed position for * the actor. * * Since: 0.6 */ void clutter_actor_set_x (ClutterActor *self, gfloat x) { ClutterActorBox old = { 0, }; ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (priv->position_set && priv->fixed_x == x) return; clutter_actor_store_old_geometry (self, &old); priv->fixed_x = x; clutter_actor_set_fixed_position_set (self, TRUE); clutter_actor_notify_if_geometry_changed (self, &old); clutter_actor_queue_relayout (self); } /** * clutter_actor_set_y: * @self: a #ClutterActor * @y: the actor's position on the Y axis * * Sets the actor's Y coordinate, relative to its parent, in pixels.# * * Overrides any layout manager and forces a fixed position for * the actor. * * Since: 0.6 */ void clutter_actor_set_y (ClutterActor *self, gfloat y) { ClutterActorBox old = { 0, }; ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (priv->position_set && priv->fixed_y == y) return; clutter_actor_store_old_geometry (self, &old); priv->fixed_y = y; clutter_actor_set_fixed_position_set (self, TRUE); clutter_actor_notify_if_geometry_changed (self, &old); clutter_actor_queue_relayout (self); } /** * clutter_actor_get_x * @self: A #ClutterActor * * Retrieves the X coordinate of a #ClutterActor. * * This function tries to "do what you mean", by returning the * correct value depending on the actor's state. * * If the actor has a valid allocation, this function will return * the X coordinate of the origin of the allocation box. * * If the actor has any fixed coordinate set using clutter_actor_set_x(), * clutter_actor_set_position() or clutter_actor_set_geometry(), this * function will return that coordinate. * * If both the allocation and a fixed position are missing, this function * will return 0. * * Return value: the X coordinate, in pixels, ignoring any * transformation (i.e. scaling, rotation) */ gfloat clutter_actor_get_x (ClutterActor *self) { ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); priv = self->priv; if (priv->needs_allocation) { if (priv->position_set) return priv->fixed_x; else return 0; } else return priv->allocation.x1; } /** * clutter_actor_get_y * @self: A #ClutterActor * * Retrieves the Y coordinate of a #ClutterActor. * * This function tries to "do what you mean", by returning the * correct value depending on the actor's state. * * If the actor has a valid allocation, this function will return * the Y coordinate of the origin of the allocation box. * * If the actor has any fixed coordinate set using clutter_actor_set_y(), * clutter_actor_set_position() or clutter_actor_set_geometry(), this * function will return that coordinate. * * If both the allocation and a fixed position are missing, this function * will return 0. * * Return value: the Y coordinate, in pixels, ignoring any * transformation (i.e. scaling, rotation) */ gfloat clutter_actor_get_y (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); if (self->priv->needs_allocation) { if (self->priv->position_set) return self->priv->fixed_y; else return 0; } else return self->priv->allocation.y1; } /** * clutter_actor_set_scale: * @self: A #ClutterActor * @scale_x: double factor to scale actor by horizontally. * @scale_y: double factor to scale actor by vertically. * * Scales an actor with the given factors. The scaling is relative to * the scale center and the anchor point. The scale center is * unchanged by this function and defaults to 0,0. * * Since: 0.2 */ void clutter_actor_set_scale (ClutterActor *self, gdouble scale_x, gdouble scale_y) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); priv->scale_x = scale_x; g_object_notify (G_OBJECT (self), "scale-x"); priv->scale_y = scale_y; g_object_notify (G_OBJECT (self), "scale-y"); if (CLUTTER_ACTOR_IS_VISIBLE (self)) clutter_actor_queue_redraw (self); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_set_scale_full: * @self: A #ClutterActor * @scale_x: double factor to scale actor by horizontally. * @scale_y: double factor to scale actor by vertically. * @center_x: X coordinate of the center of the scale. * @center_y: Y coordinate of the center of the scale * * Scales an actor with the given factors around the given center * point. The center point is specified in pixels relative to the * anchor point (usually the top left corner of the actor). * * Since: 1.0 */ void clutter_actor_set_scale_full (ClutterActor *self, gdouble scale_x, gdouble scale_y, gfloat center_x, gfloat center_y) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_scale (self, scale_x, scale_y); if (priv->scale_center.is_fractional) g_object_notify (G_OBJECT (self), "scale-gravity"); g_object_notify (G_OBJECT (self), "scale-center-x"); g_object_notify (G_OBJECT (self), "scale-center-y"); clutter_anchor_coord_set_units (&priv->scale_center, center_x, center_y, 0); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_set_scale_with_gravity: * @self: A #ClutterActor * @scale_x: double factor to scale actor by horizontally. * @scale_y: double factor to scale actor by vertically. * @gravity: the location of the scale center expressed as a compass * direction. * * Scales an actor with the given factors around the given * center point. The center point is specified as one of the compass * directions in #ClutterGravity. For example, setting it to north * will cause the top of the actor to remain unchanged and the rest of * the actor to expand left, right and downwards. * * Since: 1.0 */ void clutter_actor_set_scale_with_gravity (ClutterActor *self, gdouble scale_x, gdouble scale_y, ClutterGravity gravity) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (gravity == CLUTTER_GRAVITY_NONE) clutter_actor_set_scale_full (self, scale_x, scale_y, 0, 0); else { g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_scale (self, scale_x, scale_y); g_object_notify (G_OBJECT (self), "scale-gravity"); g_object_notify (G_OBJECT (self), "scale-center-x"); g_object_notify (G_OBJECT (self), "scale-center-y"); clutter_anchor_coord_set_gravity (&priv->scale_center, gravity); g_object_thaw_notify (G_OBJECT (self)); } } /** * clutter_actor_get_scale: * @self: A #ClutterActor * @scale_x: (out): Location to store horizonal float scale factor, or %NULL. * @scale_y: (out): Location to store vertical float scale factor, or %NULL. * * Retrieves an actors scale in floating point. * * Since: 0.2 */ void clutter_actor_get_scale (ClutterActor *self, gdouble *scale_x, gdouble *scale_y) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (scale_x) *scale_x = self->priv->scale_x; if (scale_y) *scale_y = self->priv->scale_y; } /** * clutter_actor_get_scale_center: * @self: A #ClutterActor * @center_x: (out): Location to store the X position of the scale center, or %NULL. * @center_y: (out): Location to store the Y position of the scale center, or %NULL. * * Retrieves the scale center coordinate in pixels relative to the top * left corner of the actor. If the scale center was specified using a * #ClutterGravity this will calculate the pixel offset using the * current size of the actor. * * Since: 1.0 */ void clutter_actor_get_scale_center (ClutterActor *self, gfloat *center_x, gfloat *center_y) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); clutter_anchor_coord_get_units (self, &self->priv->scale_center, center_x, center_y, NULL); } /** * clutter_actor_get_scale_gravity: * @self: A #ClutterActor * * Retrieves the scale center as a compass direction. If the scale * center was specified in pixels or units this will return * %CLUTTER_GRAVITY_NONE. * * Return value: the scale gravity * * Since: 1.0 */ ClutterGravity clutter_actor_get_scale_gravity (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), CLUTTER_GRAVITY_NONE); return clutter_anchor_coord_get_gravity (&self->priv->scale_center); } /** * clutter_actor_set_opacity: * @self: A #ClutterActor * @opacity: New opacity value for the actor. * * Sets the actor's opacity, with zero being completely transparent and * 255 (0xff) being fully opaque. */ void clutter_actor_set_opacity (ClutterActor *self, guint8 opacity) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (priv->opacity != opacity) { priv->opacity = opacity; clutter_actor_queue_redraw (self); g_object_notify (G_OBJECT (self), "opacity"); } } /** * clutter_actor_get_paint_opacity: * @self: A #ClutterActor * * Retrieves the absolute opacity of the actor, as it appears on the stage. * * This function traverses the hierarchy chain and composites the opacity of * the actor with that of its parents. * * This function is intended for subclasses to use in the paint virtual * function, to paint themselves with the correct opacity. * * Return value: The actor opacity value. * * Since: 0.8 */ guint8 clutter_actor_get_paint_opacity (ClutterActor *self) { ClutterActorPrivate *priv; ClutterActor *parent; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); priv = self->priv; if (priv->opacity_parent) return clutter_actor_get_paint_opacity (priv->opacity_parent); parent = priv->parent_actor; /* Factor in the actual actors opacity with parents */ if (G_LIKELY (parent)) { guint8 opacity = clutter_actor_get_paint_opacity (parent); if (opacity != 0xff) return (opacity * priv->opacity) / 0xff; } return clutter_actor_get_opacity (self); } /** * clutter_actor_get_opacity: * @self: a #ClutterActor * * Retrieves the opacity value of an actor, as set by * clutter_actor_set_opacity(). * * For retrieving the absolute opacity of the actor inside a paint * virtual function, see clutter_actor_get_paint_opacity(). * * Return value: the opacity of the actor */ guint8 clutter_actor_get_opacity (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); return self->priv->opacity; } /** * clutter_actor_set_name: * @self: A #ClutterActor * @name: Textual tag to apply to actor * * Sets the given name to @self. The name can be used to identify * a #ClutterActor. */ void clutter_actor_set_name (ClutterActor *self, const gchar *name) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_free (self->priv->name); self->priv->name = g_strdup (name); g_object_notify (G_OBJECT (self), "name"); } /** * clutter_actor_get_name: * @self: A #ClutterActor * * Retrieves the name of @self. * * Return value: the name of the actor, or %NULL. The returned string is * owned by the actor and should not be modified or freed. */ G_CONST_RETURN gchar * clutter_actor_get_name (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL); return self->priv->name; } /** * clutter_actor_get_gid: * @self: A #ClutterActor * * Retrieves the unique id for @self. * * Return value: Globally unique value for this object instance. * * Since: 0.6 */ guint32 clutter_actor_get_gid (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); return self->priv->id; } /** * clutter_actor_set_depth: * @self: a #ClutterActor * @depth: Z co-ord * * Sets the Z coordinate of @self to @depth. * * The unit used by @depth is dependant on the perspective setup. See * also clutter_stage_set_perspective(). */ void clutter_actor_set_depth (ClutterActor *self, gfloat depth) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (priv->z != depth) { /* Sets Z value - XXX 2.0: should we invert? */ priv->z = depth; if (priv->parent_actor && CLUTTER_IS_CONTAINER (priv->parent_actor)) { ClutterContainer *parent; /* We need to resort the container stacking order as to * correctly render alpha values. * * FIXME: This is sub-optimal. maybe queue the the sort * before stacking */ parent = CLUTTER_CONTAINER (priv->parent_actor); clutter_container_sort_depth_order (parent); } clutter_actor_queue_redraw (self); g_object_notify (G_OBJECT (self), "depth"); } } /** * clutter_actor_get_depth: * @self: a #ClutterActor * * Retrieves the depth of @self. * * Return value: the depth of the actor */ gfloat clutter_actor_get_depth (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), -1); return self->priv->z; } /** * clutter_actor_set_rotation: * @self: a #ClutterActor * @axis: the axis of rotation * @angle: the angle of rotation * @x: X coordinate of the rotation center * @y: Y coordinate of the rotation center * @z: Z coordinate of the rotation center * * Sets the rotation angle of @self around the given axis. * * The rotation center coordinates used depend on the value of @axis: * * %CLUTTER_X_AXIS requires @y and @z * %CLUTTER_Y_AXIS requires @x and @z * %CLUTTER_Z_AXIS requires @x and @y * * * The rotation coordinates are relative to the anchor point of the * actor, set using clutter_actor_set_anchor_point(). If no anchor * point is set, the upper left corner is assumed as the origin. * * Since: 0.8 */ void clutter_actor_set_rotation (ClutterActor *self, ClutterRotateAxis axis, gdouble angle, gfloat x, gfloat y, gfloat z) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_rotation_internal (self, axis, angle); switch (axis) { case CLUTTER_X_AXIS: clutter_anchor_coord_set_units (&priv->rx_center, x, y, z); g_object_notify (G_OBJECT (self), "rotation-center-x"); break; case CLUTTER_Y_AXIS: clutter_anchor_coord_set_units (&priv->ry_center, x, y, z); g_object_notify (G_OBJECT (self), "rotation-center-y"); break; case CLUTTER_Z_AXIS: if (priv->rz_center.is_fractional) g_object_notify (G_OBJECT (self), "rotation-center-z-gravity"); clutter_anchor_coord_set_units (&priv->rz_center, x, y, z); g_object_notify (G_OBJECT (self), "rotation-center-z"); break; } g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_set_z_rotation_from_gravity: * @self: a #ClutterActor * @angle: the angle of rotation * @gravity: the center point of the rotation * * Sets the rotation angle of @self around the Z axis using the center * point specified as a compass point. For example to rotate such that * the center of the actor remains static you can use * %CLUTTER_GRAVITY_CENTER. If the actor changes size the center point * will move accordingly. * * Since: 1.0 */ void clutter_actor_set_z_rotation_from_gravity (ClutterActor *self, gdouble angle, ClutterGravity gravity) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (gravity == CLUTTER_GRAVITY_NONE) clutter_actor_set_rotation (self, CLUTTER_Z_AXIS, angle, 0, 0, 0); else { priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_rotation_internal (self, CLUTTER_Z_AXIS, angle); clutter_anchor_coord_set_gravity (&priv->rz_center, gravity); g_object_notify (G_OBJECT (self), "rotation-center-z-gravity"); g_object_notify (G_OBJECT (self), "rotation-center-z"); g_object_thaw_notify (G_OBJECT (self)); } } /** * clutter_actor_get_rotation: * @self: a #ClutterActor * @axis: the axis of rotation * @x: (out): return value for the X coordinate of the center of rotation * @y: (out): return value for the Y coordinate of the center of rotation * @z: (out): return value for the Z coordinate of the center of rotation * * Retrieves the angle and center of rotation on the given axis, * set using clutter_actor_set_rotation(). * * Return value: the angle of rotation * * Since: 0.8 */ gdouble clutter_actor_get_rotation (ClutterActor *self, ClutterRotateAxis axis, gfloat *x, gfloat *y, gfloat *z) { ClutterActorPrivate *priv; gdouble retval = 0; AnchorCoord *anchor_coord = NULL; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); priv = self->priv; switch (axis) { case CLUTTER_X_AXIS: anchor_coord = &priv->rx_center; retval = priv->rxang; break; case CLUTTER_Y_AXIS: anchor_coord = &priv->ry_center; retval = priv->ryang; break; case CLUTTER_Z_AXIS: anchor_coord = &priv->rz_center; retval = priv->rzang; break; } clutter_anchor_coord_get_units (self, anchor_coord, x, y, z); return retval; } /** * clutter_actor_get_z_rotation_gravity: * @self: A #ClutterActor * * Retrieves the center for the rotation around the Z axis as a * compass direction. If the center was specified in pixels or units * this will return %CLUTTER_GRAVITY_NONE. * * Return value: the Z rotation center * * Since: 1.0 */ ClutterGravity clutter_actor_get_z_rotation_gravity (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.0); return clutter_anchor_coord_get_gravity (&self->priv->rz_center); } /** * clutter_actor_set_clip: * @self: A #ClutterActor * @xoff: X offset of the clip rectangle * @yoff: Y offset of the clip rectangle * @width: Width of the clip rectangle * @height: Height of the clip rectangle * * Sets clip area for @self. The clip area is always computed from the * upper left corner of the actor, even if the anchor point is set * otherwise. * * Since: 0.6 */ void clutter_actor_set_clip (ClutterActor *self, gfloat xoff, gfloat yoff, gfloat width, gfloat height) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (priv->has_clip && priv->clip[0] == xoff && priv->clip[1] == yoff && priv->clip[2] == width && priv->clip[3] == height) return; priv->clip[0] = xoff; priv->clip[1] = yoff; priv->clip[2] = width; priv->clip[3] = height; priv->has_clip = TRUE; clutter_actor_queue_redraw (self); g_object_notify (G_OBJECT (self), "has-clip"); g_object_notify (G_OBJECT (self), "clip"); } /** * clutter_actor_remove_clip * @self: A #ClutterActor * * Removes clip area from @self. */ void clutter_actor_remove_clip (ClutterActor *self) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (!self->priv->has_clip) return; self->priv->has_clip = FALSE; clutter_actor_queue_redraw (self); g_object_notify (G_OBJECT (self), "has-clip"); } /** * clutter_actor_has_clip: * @self: a #ClutterActor * * Determines whether the actor has a clip area set or not. * * Return value: %TRUE if the actor has a clip area set. * * Since: 0.1.1 */ gboolean clutter_actor_has_clip (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); return self->priv->has_clip; } /** * clutter_actor_get_clip: * @self: a #ClutterActor * @xoff: (out): return location for the X offset of the clip rectangle, or %NULL * @yoff: (out): return location for the Y offset of the clip rectangle, or %NULL * @width: (out): return location for the width of the clip rectangle, or %NULL * @height: (out): return location for the height of the clip rectangle, or %NULL * * Gets the clip area for @self, if any is set * * Since: 0.6 */ void clutter_actor_get_clip (ClutterActor *self, gfloat *xoff, gfloat *yoff, gfloat *width, gfloat *height) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (!priv->has_clip) return; if (xoff) *xoff = priv->clip[0]; if (yoff) *yoff = priv->clip[1]; if (width) *width = priv->clip[2]; if (height) *height = priv->clip[3]; } /** * clutter_actor_set_parent: * @self: A #ClutterActor * @parent: A new #ClutterActor parent * * Sets the parent of @self to @parent. The opposite function is * clutter_actor_unparent(). * * This function should not be used by applications, but by custom * container actor subclasses. */ void clutter_actor_set_parent (ClutterActor *self, ClutterActor *parent) { ClutterMainContext *clutter_context; ClutterActorPrivate *priv; clutter_context = clutter_context_get_default (); g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (CLUTTER_IS_ACTOR (parent)); g_return_if_fail (self != parent); g_return_if_fail (clutter_context != NULL); priv = self->priv; if (priv->parent_actor != NULL) { g_warning ("Cannot set a parent on an actor which has a parent.\n" "You must use clutter_actor_unparent() first.\n"); return; } if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { g_warning ("Cannot set a parent on a toplevel actor\n"); return; } g_object_ref_sink (self); priv->parent_actor = parent; /* clutter_actor_reparent() will emit ::parent-set for us */ if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)) g_signal_emit (self, actor_signals[PARENT_SET], 0, NULL); /* If parent is mapped or realized, we need to also be mapped or * realized once we're inside the parent. */ clutter_actor_update_map_state (self, MAP_STATE_CHECK); if (priv->show_on_set_parent) clutter_actor_show (self); if (CLUTTER_ACTOR_IS_MAPPED (self)) { clutter_actor_queue_redraw (self); } /* maintain the invariant that if an actor needs layout, * its parents do as well */ if (priv->needs_width_request || priv->needs_height_request || priv->needs_allocation) { /* we work around the short-circuiting we do * in clutter_actor_queue_relayout() since we * want to force a relayout */ priv->needs_width_request = TRUE; priv->needs_height_request = TRUE; priv->needs_allocation = TRUE; clutter_actor_queue_relayout (priv->parent_actor); } } /** * clutter_actor_get_parent: * @self: A #ClutterActor * * Retrieves the parent of @self. * * Return Value: (transfer none): The #ClutterActor parent, or %NULL if no parent is set */ ClutterActor * clutter_actor_get_parent (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL); return self->priv->parent_actor; } /** * clutter_actor_get_paint_visibility: * @self: A #ClutterActor * * Retrieves the 'paint' visibility of an actor recursively checking for non * visible parents. * * This is by definition the same as CLUTTER_ACTOR_IS_MAPPED(). * * Return Value: TRUE if the actor is visibile and will be painted. * * Since: 0.8.4 */ gboolean clutter_actor_get_paint_visibility (ClutterActor *actor) { g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE); return CLUTTER_ACTOR_IS_MAPPED (actor); } /** * clutter_actor_unparent: * @self: a #ClutterActor * * Removes the parent of @self. * * This function should not be used in applications. It should be called by * implementations of container actors, to dissociate a child from the * container. * * Since: 0.1.1 */ void clutter_actor_unparent (ClutterActor *self) { ClutterActorPrivate *priv; ClutterActor *old_parent; gboolean was_mapped; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; if (priv->parent_actor == NULL) return; was_mapped = CLUTTER_ACTOR_IS_MAPPED (self); /* we need to unrealize *before* we set parent_actor to NULL, * because in an unrealize method actors are dissociating from the * stage, which means they need to be able to * clutter_actor_get_stage(). This should unmap and unrealize, * unless we're reparenting. */ clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNREALIZED); old_parent = priv->parent_actor; priv->parent_actor = NULL; /* clutter_actor_reparent() will emit ::parent-set for us */ if (!(CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IN_REPARENT)) g_signal_emit (self, actor_signals[PARENT_SET], 0, old_parent); /* Queue a redraw on old_parent only if we were painted in the first * place. Will be no-op if old parent is not shown. */ if (was_mapped && !CLUTTER_ACTOR_IS_MAPPED (self)) clutter_actor_queue_redraw (old_parent); /* remove the reference we acquired in clutter_actor_set_parent() */ g_object_unref (self); } /** * clutter_actor_reparent: * @self: a #ClutterActor * @new_parent: the new #ClutterActor parent * * This function resets the parent actor of @self. It is * logically equivalent to calling clutter_actor_unparent() * and clutter_actor_set_parent(), but more efficiently * implemented, ensures the child is not finalized * when unparented, and emits the parent-set signal only * one time. * * Since: 0.2 */ void clutter_actor_reparent (ClutterActor *self, ClutterActor *new_parent) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (CLUTTER_IS_ACTOR (new_parent)); g_return_if_fail (self != new_parent); if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { g_warning ("Cannot set a parent on a toplevel actor\n"); return; } priv = self->priv; if (priv->parent_actor != new_parent) { ClutterActor *old_parent; CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_REPARENT); old_parent = priv->parent_actor; g_object_ref (self); if (CLUTTER_IS_CONTAINER (priv->parent_actor)) { ClutterContainer *parent = CLUTTER_CONTAINER (priv->parent_actor); /* Note, will call unparent() */ clutter_container_remove_actor (parent, self); } else clutter_actor_unparent (self); if (CLUTTER_IS_CONTAINER (new_parent)) /* Note, will call parent() */ clutter_container_add_actor (CLUTTER_CONTAINER (new_parent), self); else clutter_actor_set_parent (self, new_parent); /* we emit the ::parent-set signal once */ g_signal_emit (self, actor_signals[PARENT_SET], 0, old_parent); g_object_unref (self); CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_REPARENT); /* the IN_REPARENT flag suspends state updates */ clutter_actor_update_map_state (self, MAP_STATE_CHECK); } } /** * clutter_actor_raise: * @self: A #ClutterActor * @below: (allow-none): A #ClutterActor to raise above. * * Puts @self above @below. * * Both actors must have the same parent. * * This function is the equivalent of clutter_container_raise_child(). */ void clutter_actor_raise (ClutterActor *self, ClutterActor *below) { ClutterActor *parent; g_return_if_fail (CLUTTER_IS_ACTOR (self)); parent = clutter_actor_get_parent (self); if (!parent) { g_warning ("Actor of type %s is not inside a container", g_type_name (G_OBJECT_TYPE (self))); return; } if (below) { if (parent != clutter_actor_get_parent (below)) { g_warning ("Actor of type %s is not in the same " "container of actor of type %s", g_type_name (G_OBJECT_TYPE (self)), g_type_name (G_OBJECT_TYPE (below))); return; } } clutter_container_raise_child (CLUTTER_CONTAINER (parent), self, below); } /** * clutter_actor_lower: * @self: A #ClutterActor * @above: (allow-none): A #ClutterActor to lower below * * Puts @self below @above. * * Both actors must have the same parent. * * This function is the equivalent of clutter_container_lower_child(). */ void clutter_actor_lower (ClutterActor *self, ClutterActor *above) { ClutterActor *parent; g_return_if_fail (CLUTTER_IS_ACTOR(self)); parent = clutter_actor_get_parent (self); if (!parent) { g_warning ("Actor of type %s is not inside a container", g_type_name (G_OBJECT_TYPE (self))); return; } if (above) { if (parent != clutter_actor_get_parent (above)) { g_warning ("Actor of type %s is not in the same " "container of actor of type %s", g_type_name (G_OBJECT_TYPE (self)), g_type_name (G_OBJECT_TYPE (above))); return; } } clutter_container_lower_child (CLUTTER_CONTAINER (parent), self, above); } /** * clutter_actor_raise_top: * @self: A #ClutterActor * * Raises @self to the top. * * This function calls clutter_actor_raise() internally. */ void clutter_actor_raise_top (ClutterActor *self) { clutter_actor_raise (self, NULL); } /** * clutter_actor_lower_bottom: * @self: A #ClutterActor * * Lowers @self to the bottom. * * This function calls clutter_actor_lower() internally. */ void clutter_actor_lower_bottom (ClutterActor *self) { clutter_actor_lower (self, NULL); } /* * Event handling */ /** * clutter_actor_event: * @actor: a #ClutterActor * @event: a #ClutterEvent * @capture: TRUE if event in in capture phase, FALSE otherwise. * * This function is used to emit an event on the main stage. * You should rarely need to use this function, except for * synthetising events. * * Return value: the return value from the signal emission: %TRUE * if the actor handled the event, or %FALSE if the event was * not handled * * Since: 0.6 */ gboolean clutter_actor_event (ClutterActor *actor, ClutterEvent *event, gboolean capture) { gboolean retval = FALSE; gint signal_num = -1; g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE); g_return_val_if_fail (event != NULL, FALSE); g_object_ref (actor); if (capture) { g_signal_emit (actor, actor_signals[CAPTURED_EVENT], 0, event, &retval); goto out; } g_signal_emit (actor, actor_signals[EVENT], 0, event, &retval); if (!retval) { switch (event->type) { case CLUTTER_NOTHING: break; case CLUTTER_BUTTON_PRESS: signal_num = BUTTON_PRESS_EVENT; break; case CLUTTER_BUTTON_RELEASE: signal_num = BUTTON_RELEASE_EVENT; break; case CLUTTER_SCROLL: signal_num = SCROLL_EVENT; break; case CLUTTER_KEY_PRESS: signal_num = KEY_PRESS_EVENT; break; case CLUTTER_KEY_RELEASE: signal_num = KEY_RELEASE_EVENT; break; case CLUTTER_MOTION: signal_num = MOTION_EVENT; break; case CLUTTER_ENTER: signal_num = ENTER_EVENT; break; case CLUTTER_LEAVE: signal_num = LEAVE_EVENT; break; case CLUTTER_DELETE: case CLUTTER_DESTROY_NOTIFY: case CLUTTER_CLIENT_MESSAGE: default: signal_num = -1; break; } if (signal_num != -1) g_signal_emit (actor, actor_signals[signal_num], 0, event, &retval); } out: g_object_unref (actor); return retval; } /** * clutter_actor_set_reactive: * @actor: a #ClutterActor * @reactive: whether the actor should be reactive to events * * Sets @actor as reactive. Reactive actors will receive events. * * Since: 0.6 */ void clutter_actor_set_reactive (ClutterActor *actor, gboolean reactive) { g_return_if_fail (CLUTTER_IS_ACTOR (actor)); if (reactive == CLUTTER_ACTOR_IS_REACTIVE (actor)) return; if (reactive) CLUTTER_ACTOR_SET_FLAGS (actor, CLUTTER_ACTOR_REACTIVE); else CLUTTER_ACTOR_UNSET_FLAGS (actor, CLUTTER_ACTOR_REACTIVE); g_object_notify (G_OBJECT (actor), "reactive"); } /** * clutter_actor_get_reactive: * @actor: a #ClutterActor * * Checks whether @actor is marked as reactive. * * Return value: %TRUE if the actor is reactive * * Since: 0.6 */ gboolean clutter_actor_get_reactive (ClutterActor *actor) { g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), FALSE); return CLUTTER_ACTOR_IS_REACTIVE (actor) ? TRUE : FALSE; } /** * clutter_actor_get_anchor_point: * @self: a #ClutterActor * @anchor_x: (out): return location for the X coordinate of the anchor point * @anchor_y: (out): return location for the Y coordinate of the anchor point * * Gets the current anchor point of the @actor in pixels. * * Since: 0.6 */ void clutter_actor_get_anchor_point (ClutterActor *self, gfloat *anchor_x, gfloat *anchor_y) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; clutter_anchor_coord_get_units (self, &priv->anchor, anchor_x, anchor_y, NULL); } /** * clutter_actor_set_anchor_point: * @self: a #ClutterActor * @anchor_x: X coordinate of the anchor point * @anchor_y: Y coordinate of the anchor point * * Sets an anchor point for @self. The anchor point is a point in the * coordinate space of an actor to which the actor position within its * parent is relative; the default is (0, 0), i.e. the top-left corner * of the actor. * * Since: 0.6 */ void clutter_actor_set_anchor_point (ClutterActor *self, gfloat anchor_x, gfloat anchor_y) { ClutterActorPrivate *priv; gboolean changed = FALSE; gfloat old_anchor_x, old_anchor_y; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); clutter_anchor_coord_get_units (self, &priv->anchor, &old_anchor_x, &old_anchor_y, NULL); if (priv->anchor.is_fractional) g_object_notify (G_OBJECT (self), "anchor-gravity"); if (old_anchor_x != anchor_x) { g_object_notify (G_OBJECT (self), "anchor-x"); changed = TRUE; } if (old_anchor_y != anchor_y) { g_object_notify (G_OBJECT (self), "anchor-y"); changed = TRUE; } clutter_anchor_coord_set_units (&priv->anchor, anchor_x, anchor_y, 0); if (changed && CLUTTER_ACTOR_IS_VISIBLE (self)) clutter_actor_queue_redraw (self); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_get_anchor_point_gravity: * @self: a #ClutterActor * * Retrieves the anchor position expressed as a #ClutterGravity. If * the anchor point was specified using pixels or units this will * return %CLUTTER_GRAVITY_NONE. * * Return value: the #ClutterGravity used by the anchor point * * Since: 1.0 */ ClutterGravity clutter_actor_get_anchor_point_gravity (ClutterActor *self) { ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), CLUTTER_GRAVITY_NONE); priv = self->priv; return clutter_anchor_coord_get_gravity (&priv->anchor); } /** * clutter_actor_move_anchor_point: * @self: a #ClutterActor * @anchor_x: X coordinate of the anchor point * @anchor_y: Y coordinate of the anchor point * * Sets an anchor point for the actor, and adjusts the actor postion so that * the relative position of the actor toward its parent remains the same. * * Since: 0.6 */ void clutter_actor_move_anchor_point (ClutterActor *self, gfloat anchor_x, gfloat anchor_y) { ClutterActorPrivate *priv; gfloat old_anchor_x, old_anchor_y; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; clutter_anchor_coord_get_units (self, &priv->anchor, &old_anchor_x, &old_anchor_y, NULL); g_object_freeze_notify (G_OBJECT (self)); clutter_actor_set_anchor_point (self, anchor_x, anchor_y); if (priv->position_set) clutter_actor_move_by (self, anchor_x - old_anchor_x, anchor_y - old_anchor_y); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_move_anchor_point_from_gravity: * @self: a #ClutterActor * @gravity: #ClutterGravity. * * Sets an anchor point on the actor based on the given gravity, adjusting the * actor postion so that its relative position within its parent remains * unchanged. * * Since version 1.0 the anchor point will be stored as a gravity so * that if the actor changes size then the anchor point will move. For * example, if you set the anchor point to %CLUTTER_GRAVITY_SOUTH_EAST * and later double the size of the actor, the anchor point will move * to the bottom right. * * Since: 0.6 */ void clutter_actor_move_anchor_point_from_gravity (ClutterActor *self, ClutterGravity gravity) { gfloat old_anchor_x, old_anchor_y, new_anchor_x, new_anchor_y; ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; g_object_freeze_notify (G_OBJECT (self)); clutter_anchor_coord_get_units (self, &priv->anchor, &old_anchor_x, &old_anchor_y, NULL); clutter_actor_set_anchor_point_from_gravity (self, gravity); clutter_anchor_coord_get_units (self, &priv->anchor, &new_anchor_x, &new_anchor_y, NULL); if (priv->position_set) clutter_actor_move_by (self, new_anchor_x - old_anchor_x, new_anchor_y - old_anchor_y); g_object_thaw_notify (G_OBJECT (self)); } /** * clutter_actor_set_anchor_point_from_gravity: * @self: a #ClutterActor * @gravity: #ClutterGravity. * * Sets an anchor point on the actor, based on the given gravity (this is a * convenience function wrapping clutter_actor_set_anchor_point()). * * Since version 1.0 the anchor point will be stored as a gravity so * that if the actor changes size then the anchor point will move. For * example, if you set the anchor point to %CLUTTER_GRAVITY_SOUTH_EAST * and later double the size of the actor, the anchor point will move * to the bottom right. * * Since: 0.6 */ void clutter_actor_set_anchor_point_from_gravity (ClutterActor *self, ClutterGravity gravity) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (gravity == CLUTTER_GRAVITY_NONE) clutter_actor_set_anchor_point (self, 0, 0); else { clutter_anchor_coord_set_gravity (&self->priv->anchor, gravity); g_object_notify (G_OBJECT (self), "anchor-gravity"); g_object_notify (G_OBJECT (self), "anchor-x"); g_object_notify (G_OBJECT (self), "anchor-y"); } } typedef enum { PARSE_X, PARSE_Y, PARSE_WIDTH, PARSE_HEIGHT, PARSE_ANCHOR_X, PARSE_ANCHOR_Y } ParseDimension; static gfloat parse_units (ClutterActor *self, ParseDimension dimension, JsonNode *node) { GValue value = { 0, }; gfloat retval = 0; if (JSON_NODE_TYPE (node) != JSON_NODE_VALUE) return 0; json_node_get_value (node, &value); if (G_VALUE_HOLDS (&value, G_TYPE_INT)) { retval = g_value_get_int (&value); } else if (G_VALUE_HOLDS (&value, G_TYPE_STRING)) { gint64 val; gchar *end; val = g_ascii_strtoll (g_value_get_string (&value), &end, 10); /* skip whitespace */ while (g_ascii_isspace (*end)) end++; /* assume pixels */ if (*end == '\0') { retval = val; goto out; } if (strcmp (end, "px") == 0) { retval = val; goto out; } if (strcmp (end, "em") == 0) { retval = CLUTTER_UNITS_FROM_EM (val); goto out; } if (strcmp (end, "mm") == 0) { retval = CLUTTER_UNITS_FROM_MM (val); goto out; } if (strcmp (end, "pt") == 0) { retval = CLUTTER_UNITS_FROM_POINTS (val); goto out; } if (end[0] == '%' && end[1] == '\0') { ClutterActor *stage; if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { g_warning ("Unable to set percentage of %s on a top-level " "actor of type '%s'", (dimension == PARSE_X || dimension == PARSE_WIDTH || dimension == PARSE_ANCHOR_X) ? "width" : "height", g_type_name (G_OBJECT_TYPE (self))); retval = 0; goto out; } stage = clutter_actor_get_stage (self); if (stage == NULL) stage = clutter_stage_get_default (); if (dimension == PARSE_X || dimension == PARSE_WIDTH || dimension == PARSE_ANCHOR_X) { retval = clutter_actor_get_width (stage) * val; } else { retval = clutter_actor_get_height (stage) * val; } goto out; } g_warning ("Invalid value '%s': integers, strings or floating point " "values can be used for the x, y, width and height " "properties. Valid modifiers for strings are 'px', 'mm' " "and '%%'.", g_value_get_string (&value)); retval = 0; } else if (G_VALUE_HOLDS (&value, G_TYPE_DOUBLE)) { ClutterActor *stage; gdouble val; stage = clutter_actor_get_stage (self); if (stage == NULL) stage = clutter_stage_get_default (); if (CLUTTER_PRIVATE_FLAGS (self) & CLUTTER_ACTOR_IS_TOPLEVEL) { g_warning ("Unable to set percentage of %s on a top-level " "actor of type '%s'", (dimension == PARSE_X || dimension == PARSE_WIDTH) ? "width" : "height", g_type_name (G_OBJECT_TYPE (self))); retval = 0; goto out; } val = g_value_get_double (&value); if (dimension == PARSE_X || dimension == PARSE_WIDTH || dimension == PARSE_ANCHOR_X) { retval = clutter_actor_get_width (stage) * val; } else { retval = clutter_actor_get_height (stage) * val; } } else { g_warning ("Invalid value of type '%s': integers, strings of floating " "point values can be used for the x, y, width, height " "anchor-x and anchor-y properties.", g_type_name (G_VALUE_TYPE (&value))); } out: g_value_unset (&value); return retval; } typedef struct { ClutterRotateAxis axis; gdouble angle; gfloat center_x; gfloat center_y; gfloat center_z; } RotationInfo; static inline gboolean parse_rotation_array (ClutterActor *actor, JsonArray *array, RotationInfo *info) { JsonNode *element; if (json_array_get_length (array) != 2) return FALSE; /* angle */ element = json_array_get_element (array, 0); if (JSON_NODE_TYPE (element) == JSON_NODE_VALUE) info->angle = json_node_get_double (element); else return FALSE; /* center */ element = json_array_get_element (array, 1); if (JSON_NODE_TYPE (element) == JSON_NODE_ARRAY) { JsonArray *center = json_node_get_array (element); if (json_array_get_length (center) != 2) return FALSE; switch (info->axis) { case CLUTTER_X_AXIS: info->center_y = parse_units (actor, PARSE_Y, json_array_get_element (center, 0)); info->center_z = parse_units (actor, PARSE_Y, json_array_get_element (center, 1)); return TRUE; case CLUTTER_Y_AXIS: info->center_x = parse_units (actor, PARSE_X, json_array_get_element (center, 0)); info->center_z = parse_units (actor, PARSE_X, json_array_get_element (center, 1)); return TRUE; case CLUTTER_Z_AXIS: info->center_x = parse_units (actor, PARSE_X, json_array_get_element (center, 0)); info->center_y = parse_units (actor, PARSE_Y, json_array_get_element (center, 1)); return TRUE; } } return FALSE; } static gboolean parse_rotation (ClutterActor *actor, JsonNode *node, RotationInfo *info) { JsonArray *array; guint len, i; gboolean retval = FALSE; if (JSON_NODE_TYPE (node) != JSON_NODE_ARRAY) { g_warning ("Invalid node of type '%s' found, expecting an array", json_node_type_name (node)); return FALSE; } array = json_node_get_array (node); len = json_array_get_length (array); for (i = 0; i < len; i++) { JsonNode *element = json_array_get_element (array, i); JsonObject *object; JsonNode *member; if (JSON_NODE_TYPE (element) != JSON_NODE_OBJECT) { g_warning ("Invalid node of type '%s' found, expecting an object", json_node_type_name (element)); return FALSE; } object = json_node_get_object (element); if (json_object_has_member (object, "x-axis")) { member = json_object_get_member (object, "x-axis"); info->axis = CLUTTER_X_AXIS; if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE) { info->angle = json_node_get_double (member); retval = TRUE; } else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY) retval = parse_rotation_array (actor, json_node_get_array (member), info); else retval = FALSE; } else if (json_object_has_member (object, "y-axis")) { member = json_object_get_member (object, "y-axis"); info->axis = CLUTTER_Y_AXIS; if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE) { info->angle = json_node_get_double (member); retval = TRUE; } else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY) retval = parse_rotation_array (actor, json_node_get_array (member), info); else retval = FALSE; } else if (json_object_has_member (object, "z-axis")) { member = json_object_get_member (object, "z-axis"); info->axis = CLUTTER_Z_AXIS; if (JSON_NODE_TYPE (member) == JSON_NODE_VALUE) { info->angle = json_node_get_double (member); retval = TRUE; } else if (JSON_NODE_TYPE (member) == JSON_NODE_ARRAY) retval = parse_rotation_array (actor, json_node_get_array (member), info); else retval = FALSE; } } return retval; } static gboolean clutter_actor_parse_custom_node (ClutterScriptable *scriptable, ClutterScript *script, GValue *value, const gchar *name, JsonNode *node) { ClutterActor *actor = CLUTTER_ACTOR (scriptable); gboolean retval = FALSE; if ((name[0] == 'x' && name[1] == '\0') || (name[0] == 'y' && name[1] == '\0') || (strcmp (name, "width") == 0) || (strcmp (name, "height") == 0) || (strcmp (name, "anchor_x") == 0) || (strcmp (name, "anchor_y") == 0)) { ParseDimension dimension; gfloat units; if (name[0] == 'x') dimension = PARSE_X; else if (name[0] == 'y') dimension = PARSE_Y; else if (name[0] == 'w') dimension = PARSE_WIDTH; else if (name[0] == 'h') dimension = PARSE_HEIGHT; else if (name[0] == 'a' && name[7] == 'x') dimension = PARSE_ANCHOR_X; else if (name[0] == 'a' && name[7] == 'y') dimension = PARSE_ANCHOR_Y; else return FALSE; units = parse_units (actor, dimension, node); /* convert back to pixels: all properties are pixel-based */ g_value_init (value, G_TYPE_INT); g_value_set_int (value, units); retval = TRUE; } else if (strcmp (name, "rotation") == 0) { RotationInfo *info; info = g_slice_new0 (RotationInfo); retval = parse_rotation (actor, node, info); if (retval) { g_value_init (value, G_TYPE_POINTER); g_value_set_pointer (value, info); } else g_slice_free (RotationInfo, info); } return retval; } static void clutter_actor_set_custom_property (ClutterScriptable *scriptable, ClutterScript *script, const gchar *name, const GValue *value) { CLUTTER_NOTE (SCRIPT, "in ClutterActor::set_custom_property('%s')", name); if (strcmp (name, "rotation") == 0) { RotationInfo *info; if (!G_VALUE_HOLDS (value, G_TYPE_POINTER)) return; info = g_value_get_pointer (value); clutter_actor_set_rotation (CLUTTER_ACTOR (scriptable), info->axis, info->angle, info->center_x, info->center_y, info->center_z); g_slice_free (RotationInfo, info); } else g_object_set_property (G_OBJECT (scriptable), name, value); } static void clutter_scriptable_iface_init (ClutterScriptableIface *iface) { iface->parse_custom_node = clutter_actor_parse_custom_node; iface->set_custom_property = clutter_actor_set_custom_property; } /** * clutter_actor_transform_stage_point * @self: A #ClutterActor * @x: (in): x screen coordinate of the point to unproject * @y: (in): y screen coordinate of the point to unproject * @x_out: (out): return location for the unprojected x coordinance * @y_out: (out): return location for the unprojected y coordinance * * This function translates screen coordinates (@x, @y) to * coordinates relative to the actor. For example, it can be used to translate * screen events from global screen coordinates into actor-local coordinates. * * The conversion can fail, notably if the transform stack results in the * actor being projected on the screen as a mere line. * * The conversion should not be expected to be pixel-perfect due to the * nature of the operation. In general the error grows when the skewing * of the actor rectangle on screen increases. * * Note: This function is fairly computationally intensive. * * Note: This function only works when the allocation is up-to-date, * i.e. inside of paint() * * Return value: %TRUE if conversion was successful. * * Since: 0.6 */ gboolean clutter_actor_transform_stage_point (ClutterActor *self, gfloat x, gfloat y, gfloat *x_out, gfloat *y_out) { ClutterVertex v[4]; float ST[3][3]; float RQ[3][3]; int du, dv, xi, yi; float px, py; float xf, yf, wf, det; ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); priv = self->priv; /* This implementation is based on the quad -> quad projection algorithm * described by Paul Heckbert in: * * http://www.cs.cmu.edu/~ph/texfund/texfund.pdf * * and the sample implementation at: * * http://www.cs.cmu.edu/~ph/src/texfund/ * * Our texture is a rectangle with origin [0, 0], so we are mapping from * quad to rectangle only, which significantly simplifies things; the * function calls have been unrolled, and most of the math is done in fixed * point. */ clutter_actor_get_abs_allocation_vertices (self, v); /* Keeping these as ints simplifies the multiplication (no significant * loss of precision here). */ du = (int) (priv->allocation.x2 - priv->allocation.x1); dv = (int) (priv->allocation.y2 - priv->allocation.y1); if (!du || !dv) return FALSE; #define UX2FP(x) (x) #define DET2FP(a,b,c,d) (((a) * (d)) - ((b) * (c))) /* First, find mapping from unit uv square to xy quadrilateral; this * equivalent to the pmap_square_quad() functions in the sample * implementation, which we can simplify, since our target is always * a rectangle. */ px = v[0].x - v[1].x + v[3].x - v[2].x; py = v[0].y - v[1].y + v[3].y - v[2].y; if (!px && !py) { /* affine transform */ RQ[0][0] = UX2FP (v[1].x - v[0].x); RQ[1][0] = UX2FP (v[3].x - v[1].x); RQ[2][0] = UX2FP (v[0].x); RQ[0][1] = UX2FP (v[1].y - v[0].y); RQ[1][1] = UX2FP (v[3].y - v[1].y); RQ[2][1] = UX2FP (v[0].y); RQ[0][2] = 0; RQ[1][2] = 0; RQ[2][2] = 1.0; } else { /* projective transform */ double dx1, dx2, dy1, dy2, del; dx1 = UX2FP (v[1].x - v[3].x); dx2 = UX2FP (v[2].x - v[3].x); dy1 = UX2FP (v[1].y - v[3].y); dy2 = UX2FP (v[2].y - v[3].y); del = DET2FP (dx1, dx2, dy1, dy2); if (!del) return FALSE; /* * The division here needs to be done in floating point for * precisions reasons. */ RQ[0][2] = (DET2FP (UX2FP (px), dx2, UX2FP (py), dy2) / del); RQ[1][2] = (DET2FP (dx1, UX2FP (px), dy1, UX2FP (py)) / del); RQ[1][2] = (DET2FP (dx1, UX2FP (px), dy1, UX2FP (py)) / del); RQ[2][2] = 1.0; RQ[0][0] = UX2FP (v[1].x - v[0].x) + (RQ[0][2] * UX2FP (v[1].x)); RQ[1][0] = UX2FP (v[2].x - v[0].x) + (RQ[1][2] * UX2FP (v[2].x)); RQ[2][0] = UX2FP (v[0].x); RQ[0][1] = UX2FP (v[1].y - v[0].y) + (RQ[0][2] * UX2FP (v[1].y)); RQ[1][1] = UX2FP (v[2].y - v[0].y) + (RQ[1][2] * UX2FP (v[2].y)); RQ[2][1] = UX2FP (v[0].y); } /* * Now combine with transform from our rectangle (u0,v0,u1,v1) to unit * square. Since our rectangle is based at 0,0 we only need to scale. */ RQ[0][0] /= du; RQ[1][0] /= dv; RQ[0][1] /= du; RQ[1][1] /= dv; RQ[0][2] /= du; RQ[1][2] /= dv; /* * Now RQ is transform from uv rectangle to xy quadrilateral; we need an * inverse of that. */ ST[0][0] = DET2FP (RQ[1][1], RQ[1][2], RQ[2][1], RQ[2][2]); ST[1][0] = DET2FP (RQ[1][2], RQ[1][0], RQ[2][2], RQ[2][0]); ST[2][0] = DET2FP (RQ[1][0], RQ[1][1], RQ[2][0], RQ[2][1]); ST[0][1] = DET2FP (RQ[2][1], RQ[2][2], RQ[0][1], RQ[0][2]); ST[1][1] = DET2FP (RQ[2][2], RQ[2][0], RQ[0][2], RQ[0][0]); ST[2][1] = DET2FP (RQ[2][0], RQ[2][1], RQ[0][0], RQ[0][1]); ST[0][2] = DET2FP (RQ[0][1], RQ[0][2], RQ[1][1], RQ[1][2]); ST[1][2] = DET2FP (RQ[0][2], RQ[0][0], RQ[1][2], RQ[1][0]); ST[2][2] = DET2FP (RQ[0][0], RQ[0][1], RQ[1][0], RQ[1][1]); /* * Check the resulting matrix is OK. */ det = (RQ[0][0] * ST[0][0]) + (RQ[0][1] * ST[0][1]) + (RQ[0][2] * ST[0][2]); if (!det) return FALSE; /* * Now transform our point with the ST matrix; the notional w * coordinate is 1, hence the last part is simply added. */ xi = (int) x; yi = (int) y; xf = xi * ST[0][0] + yi * ST[1][0] + ST[2][0]; yf = xi * ST[0][1] + yi * ST[1][1] + ST[2][1]; wf = xi * ST[0][2] + yi * ST[1][2] + ST[2][2]; if (x_out) *x_out = xf / wf; if (y_out) *y_out = yf / wf; #undef UX2FP #undef DET2FP return TRUE; } /* * ClutterGeometry */ static ClutterGeometry* clutter_geometry_copy (const ClutterGeometry *geometry) { return g_slice_dup (ClutterGeometry, geometry); } static void clutter_geometry_free (ClutterGeometry *geometry) { if (G_LIKELY (geometry != NULL)) g_slice_free (ClutterGeometry, geometry); } GType clutter_geometry_get_type (void) { static GType our_type = 0; if (G_UNLIKELY (our_type == 0)) our_type = g_boxed_type_register_static (I_("ClutterGeometry"), (GBoxedCopyFunc) clutter_geometry_copy, (GBoxedFreeFunc) clutter_geometry_free); return our_type; } /* * ClutterVertices */ static ClutterVertex * clutter_vertex_copy (const ClutterVertex *vertex) { return g_slice_dup (ClutterVertex, vertex); } static void clutter_vertex_free (ClutterVertex *vertex) { if (G_UNLIKELY (vertex != NULL)) g_slice_free (ClutterVertex, vertex); } GType clutter_vertex_get_type (void) { static GType our_type = 0; if (G_UNLIKELY (our_type == 0)) our_type = g_boxed_type_register_static (I_("ClutterVertex"), (GBoxedCopyFunc) clutter_vertex_copy, (GBoxedFreeFunc) clutter_vertex_free); return our_type; } /* * ClutterActorBox */ static ClutterActorBox * clutter_actor_box_copy (const ClutterActorBox *box) { return g_slice_dup (ClutterActorBox, box); } static void clutter_actor_box_free (ClutterActorBox *box) { if (G_LIKELY (box != NULL)) g_slice_free (ClutterActorBox, box); } GType clutter_actor_box_get_type (void) { static GType our_type = 0; if (G_UNLIKELY (our_type == 0)) our_type = g_boxed_type_register_static (I_("ClutterActorBox"), (GBoxedCopyFunc) clutter_actor_box_copy, (GBoxedFreeFunc) clutter_actor_box_free); return our_type; } /******************************************************************************/ struct _ShaderData { ClutterShader *shader; /* list of values that should be set on the shader * before each paint cycle */ GHashTable *value_hash; }; static void shader_value_free (gpointer data) { GValue *var = data; g_value_unset (var); g_slice_free (GValue, var); } static void destroy_shader_data (ClutterActor *self) { ClutterActorPrivate *actor_priv = self->priv; ShaderData *shader_data = actor_priv->shader_data; if (shader_data == NULL) return; if (shader_data->shader) { g_object_unref (shader_data->shader); shader_data->shader = NULL; } if (shader_data->value_hash) { g_hash_table_destroy (shader_data->value_hash); shader_data->value_hash = NULL; } g_slice_free (ShaderData, shader_data); actor_priv->shader_data = NULL; } /** * clutter_actor_get_shader: * @self: a #ClutterActor * * Queries the currently set #ClutterShader on @self. * * Return value: (transfer none): The currently set #ClutterShader or %NULL if no * shader is set. * * Since: 0.6 */ ClutterShader * clutter_actor_get_shader (ClutterActor *self) { ClutterActorPrivate *actor_priv; ShaderData *shader_data; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); actor_priv = self->priv; shader_data = actor_priv->shader_data; if (shader_data == NULL) return NULL; return shader_data->shader; } /** * clutter_actor_set_shader: * @self: a #ClutterActor * @shader: a #ClutterShader or %NULL to unset the shader. * * Sets the #ClutterShader to be used when rendering @self. * * If @shader is %NULL it will unset any currently set shader * for the actor. * * Return value: %TRUE if the shader was successfully applied * * Since: 0.6 */ gboolean clutter_actor_set_shader (ClutterActor *self, ClutterShader *shader) { ClutterActorPrivate *actor_priv; ShaderData *shader_data; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); g_return_val_if_fail (shader == NULL || CLUTTER_IS_SHADER (shader), FALSE); if (shader != NULL) g_object_ref (shader); else { /* if shader passed in is NULL we destroy the shader */ destroy_shader_data (self); return TRUE; } actor_priv = self->priv; shader_data = actor_priv->shader_data; if (shader_data == NULL) { actor_priv->shader_data = shader_data = g_slice_new (ShaderData); shader_data->shader = NULL; shader_data->value_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, shader_value_free); } if (shader_data->shader != NULL) g_object_unref (shader_data->shader); shader_data->shader = shader; clutter_actor_queue_redraw (self); return TRUE; } static void set_each_param (gpointer key, gpointer value, gpointer user_data) { ClutterShader *shader = user_data; GValue *var = value; clutter_shader_set_uniform (shader, (const gchar *)key, var); } static void clutter_actor_shader_pre_paint (ClutterActor *actor, gboolean repeat) { ClutterActorPrivate *priv; ShaderData *shader_data; ClutterShader *shader; ClutterMainContext *context; priv = actor->priv; shader_data = priv->shader_data; if (!shader_data) return; context = clutter_context_get_default (); shader = shader_data->shader; if (shader) { clutter_shader_set_is_enabled (shader, TRUE); g_hash_table_foreach (shader_data->value_hash, set_each_param, shader); if (!repeat) context->shaders = g_slist_prepend (context->shaders, actor); } } static void clutter_actor_shader_post_paint (ClutterActor *actor) { ClutterActorPrivate *priv; ShaderData *shader_data; ClutterShader *shader; ClutterMainContext *context; priv = actor->priv; shader_data = priv->shader_data; if (!shader_data) return; context = clutter_context_get_default (); shader = shader_data->shader; if (shader) { clutter_shader_set_is_enabled (shader, FALSE); context->shaders = g_slist_remove (context->shaders, actor); if (context->shaders) { /* call pre-paint again, this time with the second argument being * TRUE, indicating that we are reapplying the shader and thus * should not be prepended to the stack */ clutter_actor_shader_pre_paint (context->shaders->data, TRUE); } } } /** * clutter_actor_set_shader_param: * @self: a #ClutterActor * @param: the name of the parameter * @value: the value of the parameter * * Sets the value for a named parameter of the shader applied * to @actor. * * Since: 1.0 */ void clutter_actor_set_shader_param (ClutterActor *self, const gchar *param, const GValue *value) { ClutterActorPrivate *priv; ShaderData *shader_data; GValue *var; g_return_if_fail (CLUTTER_IS_ACTOR (self)); g_return_if_fail (param != NULL); g_return_if_fail (CLUTTER_VALUE_HOLDS_SHADER_FLOAT (value) || CLUTTER_VALUE_HOLDS_SHADER_INT (value) || CLUTTER_VALUE_HOLDS_SHADER_MATRIX (value) || G_VALUE_HOLDS_FLOAT (value) || G_VALUE_HOLDS_INT (value)); priv = self->priv; shader_data = priv->shader_data; if (!shader_data) return; var = g_slice_new0 (GValue); g_value_init (var, G_VALUE_TYPE (value)); g_value_copy (value, var); g_hash_table_insert (shader_data->value_hash, g_strdup (param), var); if (CLUTTER_ACTOR_IS_VISIBLE (self)) clutter_actor_queue_redraw (self); } /** * clutter_actor_set_shader_param_float: * @self: a #ClutterActor * @param: the name of the parameter * @value: the value of the parameter * * Sets the value for a named float parameter of the shader applied * to @actor. * * Since: 0.8 */ void clutter_actor_set_shader_param_float (ClutterActor *self, const gchar *param, gfloat value) { GValue var = { 0, }; g_value_init (&var, G_TYPE_FLOAT); g_value_set_float (&var, value); clutter_actor_set_shader_param (self, param, &var); g_value_unset (&var); } /** * clutter_actor_set_shader_param_int: * @self: a #ClutterActor * @param: the name of the parameter * @value: the value of the parameter * * Sets the value for a named int parameter of the shader applied to * @actor. * * Since: 0.8 */ void clutter_actor_set_shader_param_int (ClutterActor *self, const gchar *param, gint value) { GValue var = { 0, }; g_value_init (&var, G_TYPE_INT); g_value_set_int (&var, value); clutter_actor_set_shader_param (self, param, &var); g_value_unset (&var); } /** * clutter_actor_is_rotated: * @self: a #ClutterActor * * Checks whether any rotation is applied to the actor. * * Return value: %TRUE if the actor is rotated. * * Since: 0.6 */ gboolean clutter_actor_is_rotated (ClutterActor *self) { ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); priv = self->priv; if (priv->rxang || priv->ryang || priv->rzang) return TRUE; return FALSE; } /** * clutter_actor_is_scaled: * @self: a #ClutterActor * * Checks whether the actor is scaled in either dimension. * * Return value: %TRUE if the actor is scaled. * * Since: 0.6 */ gboolean clutter_actor_is_scaled (ClutterActor *self) { ClutterActorPrivate *priv; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE); priv = self->priv; if (priv->scale_x != 1.0 || priv->scale_y != 1.0) return TRUE; return FALSE; } /** * clutter_actor_box_get_from_vertices: * @vtx: array of four #ClutterVertex * @box: (out): return location for a #ClutterActorBox * * Calculates the bounding box represented by the four vertices; for details * of the vertex array see clutter_actor_get_abs_allocation_vertices(). * * Since: 0.6 */ void clutter_actor_get_box_from_vertices (ClutterVertex vtx[4], ClutterActorBox *box) { gfloat x_1, x_2, y_1, y_2; /* 4-way min/max */ x_1 = vtx[0].x; y_1 = vtx[0].y; if (vtx[1].x < x_1) x_1 = vtx[1].x; if (vtx[2].x < x_1) x_1 = vtx[2].x; if (vtx[3].x < x_1) x_1 = vtx[3].x; if (vtx[1].y < y_1) y_1 = vtx[1].y; if (vtx[2].y < y_1) y_1 = vtx[2].y; if (vtx[3].y < y_1) y_1 = vtx[3].y; x_2 = vtx[0].x; y_2 = vtx[0].y; if (vtx[1].x > x_2) x_2 = vtx[1].x; if (vtx[2].x > x_2) x_2 = vtx[2].x; if (vtx[3].x > x_2) x_2 = vtx[3].x; if (vtx[1].y > y_2) y_2 = vtx[1].y; if (vtx[2].y > y_2) y_2 = vtx[2].y; if (vtx[3].y > y_2) y_2 = vtx[3].y; box->x1 = x_1; box->x2 = x_2; box->y1 = y_1; box->y2 = y_2; } /** * clutter_actor_get_stage: * @actor: a #ClutterActor * * Retrieves the #ClutterStage where @actor is contained. * * Return value: (transfer none): the stage containing the actor, or %NULL * * Since: 0.8 */ ClutterActor * clutter_actor_get_stage (ClutterActor *actor) { g_return_val_if_fail (CLUTTER_IS_ACTOR (actor), NULL); while (actor && !(CLUTTER_PRIVATE_FLAGS (actor) & CLUTTER_ACTOR_IS_TOPLEVEL)) actor = clutter_actor_get_parent (actor); return actor; } /** * clutter_actor_allocate_preferred_size: * @self: a #ClutterActor * @absolute_origin_changed: whether the position of the parent has * changed in stage coordinates * * Allocates the natural size of @self. * * This function is a utility call for #ClutterActor implementations * that allocates the actor's preferred natural size. It can be used * by fixed layout managers (like #ClutterGroup or so called * 'composite actors') inside the ClutterActor::allocate * implementation to give each child exactly how much space it * requires. * * This function is not meant to be used by applications. It is also * not meant to be used outside the implementation of the * ClutterActor::allocate virtual function. * * Since: 0.8 */ void clutter_actor_allocate_preferred_size (ClutterActor *self, gboolean absolute_origin_changed) { gfloat actor_x, actor_y; gfloat natural_width, natural_height; ClutterActorBox actor_box; g_return_if_fail (CLUTTER_IS_ACTOR (self)); actor_x = clutter_actor_get_x (self); actor_y = clutter_actor_get_y (self); clutter_actor_get_preferred_size (self, NULL, NULL, &natural_width, &natural_height); actor_box.x1 = actor_x; actor_box.y1 = actor_y; actor_box.x2 = actor_box.x1 + natural_width; actor_box.y2 = actor_box.y1 + natural_height; clutter_actor_allocate (self, &actor_box, absolute_origin_changed); } /** * clutter_actor_grab_key_focus: * @self: a #ClutterActor * * Sets the key focus of the #ClutterStage including @self * to this #ClutterActor. * * Since: 1.0 */ void clutter_actor_grab_key_focus (ClutterActor *self) { ClutterActor *parent; g_return_if_fail (CLUTTER_IS_ACTOR (self)); parent = clutter_actor_get_parent (self); if (!parent) return; parent = clutter_actor_get_stage (self); if (parent && CLUTTER_IS_STAGE (parent)) clutter_stage_set_key_focus (CLUTTER_STAGE (parent), self); } /** * clutter_actor_get_pango_context: * @self: a #ClutterActor * * Retrieves the #PangoContext for @self. The actor's #PangoContext * is already configured using the appropriate font map, resolution * and font options. * * Unlike clutter_actor_create_pango_context(), this context is owend * by the #ClutterActor and it will be updated each time the options * stored by the #ClutterBackend change. * * You can use the returned #PangoContext to create a #PangoLayout * and render text using cogl_pango_render_layout() to reuse the * glyphs cache also used by Clutter. * * Return value: (transfer none): the #PangoContext for a #ClutterActor. * The returned #PangoContext is owned by the actor and should not be * unreferenced by the application code * * Since: 1.0 */ PangoContext * clutter_actor_get_pango_context (ClutterActor *self) { ClutterActorPrivate *priv; ClutterMainContext *ctx; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL); priv = self->priv; if (priv->pango_context) return priv->pango_context; ctx = CLUTTER_CONTEXT (); priv->pango_context = _clutter_context_get_pango_context (ctx); g_object_ref (priv->pango_context); return priv->pango_context; } /** * clutter_actor_create_pango_context: * @self: a #ClutterActor * * Creates a #PangoContext for the given actor. The #PangoContext * is already configured using the appropriate font map, resolution * and font options. * * See also clutter_actor_get_pango_context(). * * Return value: the newly created #PangoContext. Use g_object_unref() * on the returned value to deallocate its resources * * Since: 1.0 */ PangoContext * clutter_actor_create_pango_context (ClutterActor *self) { ClutterMainContext *ctx; PangoContext *retval; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL); ctx = CLUTTER_CONTEXT (); retval = _clutter_context_create_pango_context (ctx); return retval; } /** * clutter_actor_create_pango_layout: * @self: a #ClutterActor * @text: the text to set on the #PangoLayout, or %NULL * * Creates a new #PangoLayout from the same #PangoContext used * by the #ClutterActor. The #PangoLayout is already configured * with the font map, resolution and font options, and the * given @text. * * If you want to keep around a #PangoLayout created by this * function you will have to connect to the #ClutterBackend::font-changed * and #ClutterBackend::resolution-changed signals, and call * pango_layout_context_changed() in response to them. * * Return value: the newly created #PangoLayout. Use g_object_unref() * when done * * Since: 1.0 */ PangoLayout * clutter_actor_create_pango_layout (ClutterActor *self, const gchar *text) { PangoContext *context; PangoLayout *layout; g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL); context = clutter_actor_get_pango_context (self); layout = pango_layout_new (context); if (text) pango_layout_set_text (layout, text, -1); return layout; } /* Allows overriding the parent traversed when querying an actors paint * opacity. Used by ClutterClone. */ void _clutter_actor_set_opacity_parent (ClutterActor *self, ClutterActor *parent) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); self->priv->opacity_parent = parent; } /* Allows you to disable applying the actors model view transform during * a paint. Used by ClutterClone. */ void _clutter_actor_set_enable_model_view_transform (ClutterActor *self, gboolean enable) { g_return_if_fail (CLUTTER_IS_ACTOR (self)); self->priv->enable_model_view_transform = enable; } void _clutter_actor_set_enable_paint_unmapped (ClutterActor *self, gboolean enable) { ClutterActorPrivate *priv; g_return_if_fail (CLUTTER_IS_ACTOR (self)); priv = self->priv; priv->enable_paint_unmapped = enable; if (priv->enable_paint_unmapped) clutter_actor_update_map_state (self, MAP_STATE_MAKE_MAPPED); else clutter_actor_update_map_state (self, MAP_STATE_MAKE_UNMAPPED); } static void clutter_anchor_coord_get_units (ClutterActor *self, const AnchorCoord *coord, gfloat *x, gfloat *y, gfloat *z) { if (coord->is_fractional) { gfloat actor_width, actor_height; clutter_actor_get_size (self, &actor_width, &actor_height); if (x) *x = actor_width * coord->v.fraction.x; if (y) *y = actor_height * coord->v.fraction.y; if (z) *z = 0; } else { if (x) *x = coord->v.units.x; if (y) *y = coord->v.units.y; if (z) *z = coord->v.units.z; } } static void clutter_anchor_coord_set_units (AnchorCoord *coord, gfloat x, gfloat y, gfloat z) { coord->is_fractional = FALSE; coord->v.units.x = x; coord->v.units.y = y; coord->v.units.z = z; } static ClutterGravity clutter_anchor_coord_get_gravity (AnchorCoord *coord) { if (coord->is_fractional) { if (coord->v.fraction.x == 0.0) { if (coord->v.fraction.y == 0.0) return CLUTTER_GRAVITY_NORTH_WEST; else if (coord->v.fraction.y == 0.5) return CLUTTER_GRAVITY_WEST; else if (coord->v.fraction.y == 1.0) return CLUTTER_GRAVITY_SOUTH_WEST; else return CLUTTER_GRAVITY_NONE; } else if (coord->v.fraction.x == 0.5) { if (coord->v.fraction.y == 0.0) return CLUTTER_GRAVITY_NORTH; else if (coord->v.fraction.y == 0.5) return CLUTTER_GRAVITY_CENTER; else if (coord->v.fraction.y == 1.0) return CLUTTER_GRAVITY_SOUTH; else return CLUTTER_GRAVITY_NONE; } else if (coord->v.fraction.x == 1.0) { if (coord->v.fraction.y == 0.0) return CLUTTER_GRAVITY_NORTH_EAST; else if (coord->v.fraction.y == 0.5) return CLUTTER_GRAVITY_EAST; else if (coord->v.fraction.y == 1.0) return CLUTTER_GRAVITY_SOUTH_EAST; else return CLUTTER_GRAVITY_NONE; } else return CLUTTER_GRAVITY_NONE; } else return CLUTTER_GRAVITY_NONE; } static void clutter_anchor_coord_set_gravity (AnchorCoord *coord, ClutterGravity gravity) { switch (gravity) { case CLUTTER_GRAVITY_NORTH: coord->v.fraction.x = 0.5; coord->v.fraction.y = 0.0; break; case CLUTTER_GRAVITY_NORTH_EAST: coord->v.fraction.x = 1.0; coord->v.fraction.y = 0.0; break; case CLUTTER_GRAVITY_EAST: coord->v.fraction.x = 1.0; coord->v.fraction.y = 0.5; break; case CLUTTER_GRAVITY_SOUTH_EAST: coord->v.fraction.x = 1.0; coord->v.fraction.y = 1.0; break; case CLUTTER_GRAVITY_SOUTH: coord->v.fraction.x = 0.5; coord->v.fraction.y = 1.0; break; case CLUTTER_GRAVITY_SOUTH_WEST: coord->v.fraction.x = 0.0; coord->v.fraction.y = 1.0; break; case CLUTTER_GRAVITY_WEST: coord->v.fraction.x = 0.0; coord->v.fraction.y = 0.5; break; case CLUTTER_GRAVITY_NORTH_WEST: coord->v.fraction.x = 0.0; coord->v.fraction.y = 0.0; break; case CLUTTER_GRAVITY_CENTER: coord->v.fraction.x = 0.5; coord->v.fraction.y = 0.5; break; default: coord->v.fraction.x = 0.0; coord->v.fraction.y = 0.0; break; } coord->is_fractional = TRUE; } static gboolean clutter_anchor_coord_is_zero (const AnchorCoord *coord) { if (coord->is_fractional) return coord->v.fraction.x == 0.0 && coord->v.fraction.y == 0.0; else return (coord->v.units.x == 0.0 && coord->v.units.y == 0.0 && coord->v.units.z == 0.0); } /** * clutter_actor_get_flags: * @self: a #ClutterActor * * Retrieves the flags set on @self * * Return value: a bitwise or of #ClutterActorFlags or 0 * * Since: 1.0 */ ClutterActorFlags clutter_actor_get_flags (ClutterActor *self) { g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0); return self->flags; } /** * clutter_actor_set_flags: * @self: a #ClutterActor * @flags: the flags to set * * Sets @flags on @self * * This function will emit notifications for the changed properties * * Since: 1.0 */ void clutter_actor_set_flags (ClutterActor *self, ClutterActorFlags flags) { ClutterActorFlags old_flags; GObject *obj; gboolean was_reactive_set, reactive_set; gboolean was_realized_set, realized_set; gboolean was_mapped_set, mapped_set; gboolean was_visible_set, visible_set; g_return_if_fail (CLUTTER_IS_ACTOR (self)); if (self->flags == flags) return; obj = G_OBJECT (self); g_object_freeze_notify (obj); old_flags = self->flags; was_reactive_set = ((old_flags & CLUTTER_ACTOR_REACTIVE) != 0); was_realized_set = ((old_flags & CLUTTER_ACTOR_REALIZED) != 0); was_mapped_set = ((old_flags & CLUTTER_ACTOR_MAPPED) != 0); was_visible_set = ((old_flags & CLUTTER_ACTOR_VISIBLE) != 0); self->flags |= flags; reactive_set = ((self->flags & CLUTTER_ACTOR_REACTIVE) != 0); realized_set = ((self->flags & CLUTTER_ACTOR_REALIZED) != 0); mapped_set = ((self->flags & CLUTTER_ACTOR_MAPPED) != 0); visible_set = ((self->flags & CLUTTER_ACTOR_VISIBLE) != 0); if (reactive_set != was_reactive_set) g_object_notify (obj, "reactive"); if (realized_set != was_realized_set) g_object_notify (obj, "realized"); if (mapped_set != was_mapped_set) g_object_notify (obj, "mapped"); if (visible_set != was_visible_set) g_object_notify (obj, "visible"); g_object_thaw_notify (obj); } /** * clutter_actor_unset_flags: * @self: a #ClutterActor * @flags: the flags to unset * * Unsets @flags on @self * * This function will emit notifications for the changed properties * * Since: 1.0 */ void clutter_actor_unset_flags (ClutterActor *self, ClutterActorFlags flags) { ClutterActorFlags old_flags; GObject *obj; gboolean was_reactive_set, reactive_set; gboolean was_realized_set, realized_set; gboolean was_mapped_set, mapped_set; gboolean was_visible_set, visible_set; g_return_if_fail (CLUTTER_IS_ACTOR (self)); obj = G_OBJECT (self); g_object_freeze_notify (obj); old_flags = self->flags; was_reactive_set = ((old_flags & CLUTTER_ACTOR_REACTIVE) != 0); was_realized_set = ((old_flags & CLUTTER_ACTOR_REALIZED) != 0); was_mapped_set = ((old_flags & CLUTTER_ACTOR_MAPPED) != 0); was_visible_set = ((old_flags & CLUTTER_ACTOR_VISIBLE) != 0); self->flags &= ~flags; if (self->flags == old_flags) return; reactive_set = ((self->flags & CLUTTER_ACTOR_REACTIVE) != 0); realized_set = ((self->flags & CLUTTER_ACTOR_REALIZED) != 0); mapped_set = ((self->flags & CLUTTER_ACTOR_MAPPED) != 0); visible_set = ((self->flags & CLUTTER_ACTOR_VISIBLE) != 0); if (reactive_set != was_reactive_set) g_object_notify (obj, "reactive"); if (realized_set != was_realized_set) g_object_notify (obj, "realized"); if (mapped_set != was_mapped_set) g_object_notify (obj, "mapped"); if (visible_set != was_visible_set) g_object_notify (obj, "visible"); g_object_thaw_notify (obj); }