/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ /* * st-box-layout.h: box layout actor * * Copyright 2009 Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU Lesser General Public License, * version 2.1, as published by the Free Software Foundation. * * This program is distributed in the hope 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 program; if not, write to the Free Software Foundation, * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * * Written by: Thomas Wood * */ /* Portions copied from Clutter: * 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. */ /** * SECTION:st-box-layout * @short_description: a layout container arranging children in a single line * * The #StBoxLayout arranges its children along a single line, where each * child can be allocated either its preferred size or larger if the expand * option is set. If the fill option is set, the actor will be allocated more * than its requested size. If the fill option is not set, but the expand option * is enabled, then the position of the actor within the available space can * be determined by the alignment child property. * */ #include #include "st-box-layout.h" #include "st-private.h" #include "st-scrollable.h" #include "st-box-layout-child.h" static void st_box_container_iface_init (ClutterContainerIface *iface); static void st_box_scrollable_interface_init (StScrollableInterface *iface); G_DEFINE_TYPE_WITH_CODE (StBoxLayout, st_box_layout, ST_TYPE_WIDGET, G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_CONTAINER, st_box_container_iface_init) G_IMPLEMENT_INTERFACE (ST_TYPE_SCROLLABLE, st_box_scrollable_interface_init)); #define BOX_LAYOUT_PRIVATE(o) \ (G_TYPE_INSTANCE_GET_PRIVATE ((o), ST_TYPE_BOX_LAYOUT, StBoxLayoutPrivate)) enum { PROP_0, PROP_VERTICAL, PROP_PACK_START, PROP_HADJUST, PROP_VADJUST }; struct _StBoxLayoutPrivate { GList *children; guint spacing; guint is_vertical : 1; guint is_pack_start : 1; StAdjustment *hadjustment; StAdjustment *vadjustment; }; /* * StScrollable Interface Implementation */ static void adjustment_value_notify_cb (StAdjustment *adjustment, GParamSpec *pspec, StBoxLayout *box) { clutter_actor_queue_redraw (CLUTTER_ACTOR (box)); } static void scrollable_set_adjustments (StScrollable *scrollable, StAdjustment *hadjustment, StAdjustment *vadjustment) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (scrollable)->priv; g_object_freeze_notify (G_OBJECT (scrollable)); if (hadjustment != priv->hadjustment) { if (priv->hadjustment) { g_signal_handlers_disconnect_by_func (priv->hadjustment, adjustment_value_notify_cb, scrollable); g_object_unref (priv->hadjustment); } if (hadjustment) { g_object_ref (hadjustment); g_signal_connect (hadjustment, "notify::value", G_CALLBACK (adjustment_value_notify_cb), scrollable); } priv->hadjustment = hadjustment; g_object_notify (G_OBJECT (scrollable), "hadjustment"); } if (vadjustment != priv->vadjustment) { if (priv->vadjustment) { g_signal_handlers_disconnect_by_func (priv->vadjustment, adjustment_value_notify_cb, scrollable); g_object_unref (priv->vadjustment); } if (vadjustment) { g_object_ref (vadjustment); g_signal_connect (vadjustment, "notify::value", G_CALLBACK (adjustment_value_notify_cb), scrollable); } priv->vadjustment = vadjustment; g_object_notify (G_OBJECT (scrollable), "vadjustment"); } g_object_thaw_notify (G_OBJECT (scrollable)); } static void scrollable_get_adjustments (StScrollable *scrollable, StAdjustment **hadjustment, StAdjustment **vadjustment) { StBoxLayoutPrivate *priv; priv = (ST_BOX_LAYOUT (scrollable))->priv; if (priv->hadjustment) *hadjustment = priv->hadjustment; if (vadjustment) *vadjustment = priv->vadjustment; } static void st_box_scrollable_interface_init (StScrollableInterface *iface) { iface->set_adjustments = scrollable_set_adjustments; iface->get_adjustments = scrollable_get_adjustments; } /* * ClutterContainer Implementation */ static void st_box_container_add_actor (ClutterContainer *container, ClutterActor *actor) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (container)->priv; _st_container_add_actor (container, actor, &priv->children); } static void st_box_container_remove_actor (ClutterContainer *container, ClutterActor *actor) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (container)->priv; _st_container_remove_actor (container, actor, &priv->children); } static void st_box_container_foreach (ClutterContainer *container, ClutterCallback callback, gpointer callback_data) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (container)->priv; _st_container_foreach (container, callback, callback_data, &priv->children); } static void st_box_container_lower (ClutterContainer *container, ClutterActor *actor, ClutterActor *sibling) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (container)->priv; _st_container_lower (container, actor, sibling, &priv->children); } static void st_box_container_raise (ClutterContainer *container, ClutterActor *actor, ClutterActor *sibling) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (container)->priv; _st_container_raise (container, actor, sibling, &priv->children); } static void st_box_container_sort_depth_order (ClutterContainer *container) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (container)->priv; _st_container_sort_depth_order (container, &priv->children); } static void st_box_container_iface_init (ClutterContainerIface *iface) { iface->add = st_box_container_add_actor; iface->remove = st_box_container_remove_actor; iface->foreach = st_box_container_foreach; iface->lower = st_box_container_lower; iface->raise = st_box_container_raise; iface->sort_depth_order = st_box_container_sort_depth_order; iface->child_meta_type = ST_TYPE_BOX_LAYOUT_CHILD; } static void st_box_layout_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (object)->priv; StAdjustment *adjustment; switch (property_id) { case PROP_VERTICAL: g_value_set_boolean (value, priv->is_vertical); break; case PROP_PACK_START: g_value_set_boolean (value, priv->is_pack_start); break; case PROP_HADJUST: scrollable_get_adjustments (ST_SCROLLABLE (object), &adjustment, NULL); g_value_set_object (value, adjustment); break; case PROP_VADJUST: scrollable_get_adjustments (ST_SCROLLABLE (object), NULL, &adjustment); g_value_set_object (value, adjustment); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void st_box_layout_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) { StBoxLayout *box = ST_BOX_LAYOUT (object); switch (property_id) { case PROP_VERTICAL: st_box_layout_set_vertical (box, g_value_get_boolean (value)); break; case PROP_PACK_START: st_box_layout_set_pack_start (box, g_value_get_boolean (value)); break; case PROP_HADJUST: scrollable_set_adjustments (ST_SCROLLABLE (object), g_value_get_object (value), box->priv->vadjustment); break; case PROP_VADJUST: scrollable_set_adjustments (ST_SCROLLABLE (object), box->priv->hadjustment, g_value_get_object (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void st_box_layout_dispose (GObject *object) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (object)->priv; while (priv->children) clutter_actor_destroy (priv->children->data); if (priv->hadjustment) { g_object_unref (priv->hadjustment); priv->hadjustment = NULL; } if (priv->vadjustment) { g_object_unref (priv->vadjustment); priv->vadjustment = NULL; } G_OBJECT_CLASS (st_box_layout_parent_class)->dispose (object); } static void get_content_preferred_width (StBoxLayout *self, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p) { StBoxLayoutPrivate *priv = self->priv; gint n_children = 0; gint n_fixed = 0; gfloat min_width, natural_width; GList *l; min_width = 0; natural_width = 0; for (l = priv->children; l; l = g_list_next (l)) { ClutterActor *child = l->data; gfloat child_min = 0, child_nat = 0; gboolean child_fill; if (!CLUTTER_ACTOR_IS_VISIBLE (child)) continue; n_children++; if (clutter_actor_get_fixed_position_set (child)) { n_fixed++; continue; } if (priv->is_vertical) { _st_actor_get_preferred_width (child, -1, FALSE, &child_min, &child_nat); min_width = MAX (child_min, min_width); natural_width = MAX (child_nat, natural_width); } else { clutter_container_child_get ((ClutterContainer*) self, child, "y-fill", &child_fill, NULL); _st_actor_get_preferred_width (child, for_height, child_fill, &child_min, &child_nat); min_width += child_min; natural_width += child_nat; } } if (!priv->is_vertical && (n_children - n_fixed) > 1) { min_width += priv->spacing * (n_children - n_fixed - 1); natural_width += priv->spacing * (n_children - n_fixed - 1); } if (min_width_p) *min_width_p = min_width; if (natural_width_p) *natural_width_p = natural_width; } static void st_box_layout_get_preferred_width (ClutterActor *actor, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p) { StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); st_theme_node_adjust_for_height (theme_node, &for_height); get_content_preferred_width (ST_BOX_LAYOUT (actor), for_height, min_width_p, natural_width_p); st_theme_node_adjust_preferred_width (theme_node, min_width_p, natural_width_p); } static void get_content_preferred_height (StBoxLayout *self, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p) { StBoxLayoutPrivate *priv = self->priv; gint n_children = 0; gint n_fixed = 0; gfloat min_height, natural_height; GList *l; min_height = 0; natural_height = 0; for (l = priv->children; l; l = g_list_next (l)) { ClutterActor *child = l->data; gfloat child_min = 0, child_nat = 0; gboolean child_fill = FALSE; if (!CLUTTER_ACTOR_IS_VISIBLE (child)) continue; n_children++; if (clutter_actor_get_fixed_position_set (child)) { n_fixed++; continue; } if (priv->is_vertical) { clutter_container_child_get ((ClutterContainer*) self, child, "x-fill", &child_fill, NULL); } _st_actor_get_preferred_height (child, (priv->is_vertical) ? for_width : -1, child_fill, &child_min, &child_nat); if (!priv->is_vertical) { min_height = MAX (child_min, min_height); natural_height = MAX (child_nat, natural_height); } else { min_height += child_min; natural_height += child_nat; } } if (priv->is_vertical && (n_children - n_fixed) > 1) { min_height += priv->spacing * (n_children - n_fixed - 1); natural_height += priv->spacing * (n_children - n_fixed - 1); } if (min_height_p) *min_height_p = min_height; if (natural_height_p) *natural_height_p = natural_height; } static void st_box_layout_get_preferred_height (ClutterActor *actor, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p) { StBoxLayout *self = ST_BOX_LAYOUT (actor); StBoxLayoutPrivate *priv = self->priv; StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); st_theme_node_adjust_for_width (theme_node, &for_width); if (priv->hadjustment) { /* If we're scrolled, the parent calls us with the width that * we'll actually get, which can be smaller than the minimum * width that we give our contents. */ gfloat min_width; get_content_preferred_width (self, -1, &min_width, NULL); for_width = MAX (for_width, min_width); } get_content_preferred_height (self, for_width, min_height_p, natural_height_p); st_theme_node_adjust_preferred_height (theme_node, min_height_p, natural_height_p); } typedef struct { int child_index; gfloat shrink_amount; } BoxChildShrink; /* Sort with the greatest shrink amount first */ static int compare_by_shrink_amount (const void *a, const void *b) { float diff = ((const BoxChildShrink *)a)->shrink_amount - ((const BoxChildShrink *)b)->shrink_amount; return diff < 0 ? 1 : (diff == 0 ? 0 : -1); } /* Sort in ascending order by child index */ static int compare_by_child_index (const void *a, const void *b) { return ((const BoxChildShrink *)a)->child_index - ((const BoxChildShrink *)b)->child_index; } static BoxChildShrink * compute_shrinks (StBoxLayout *self, gfloat for_length, gfloat total_shrink) { StBoxLayoutPrivate *priv = self->priv; int n_children = g_list_length (priv->children); BoxChildShrink *shrinks = g_new0 (BoxChildShrink, n_children); gfloat shrink_so_far, base_shrink; int n_shrink_children; GList *l; int i; /* The effect that we want is that all the children get an equal chance * to expand from their minimum size up to the natural size. Or to put * it a different way, we want to start by shrinking only the child that * can shrink most, then shrink that and the next most shrinkable child, * to the point where we are shrinking everything. */ /* Find the amount of possible shrink for each child */ int n_possible_shrink_children = 0; for (l = priv->children, i = 0; l; l = l->next, i++) { ClutterActor *child = l->data; gfloat child_min, child_nat; gboolean child_fill; gboolean fixed; child = (ClutterActor*) l->data; fixed = clutter_actor_get_fixed_position_set (child); shrinks[i].child_index = i; if (CLUTTER_ACTOR_IS_VISIBLE (child) && !fixed) { if (priv->is_vertical) { clutter_container_child_get ((ClutterContainer*) self, child, "x-fill", &child_fill, NULL); _st_actor_get_preferred_height (child, for_length, child_fill, &child_min, &child_nat); } else { clutter_container_child_get ((ClutterContainer*) self, child, "y-fill", &child_fill, NULL); _st_actor_get_preferred_width (child, for_length, child_fill, &child_min, &child_nat); } shrinks[i].shrink_amount = MAX (0., child_nat - child_min); n_possible_shrink_children++; } else { shrinks[i].shrink_amount = -1.; } } /* We want to process children starting from the child with the maximum available * shrink, so sort in this order; !visible children end up at the end */ qsort (shrinks, n_children, sizeof (BoxChildShrink), compare_by_shrink_amount); /* +--+ * | | * | | +-- * | | | | * | | | | +-+ * --+--+-+-+-+-+---------- * | | | | | | +-+ +-+ * | | | | | | | | | | * --+--+-+-+-+-+-+-+------ * * We are trying to find the correct position for the upper line the "water mark" * so that total of the portion of the bars above the line is equal to the total * amount we want to shrink. */ /* Start by moving the line downward, top-of-bar by top-of-bar */ shrink_so_far = 0; for (n_shrink_children = 1; n_shrink_children <= n_possible_shrink_children; n_shrink_children++) { if (n_shrink_children < n_possible_shrink_children) base_shrink = shrinks[n_shrink_children].shrink_amount; else base_shrink = 0; shrink_so_far += n_shrink_children * (shrinks[n_shrink_children - 1].shrink_amount - base_shrink); if (shrink_so_far >= total_shrink || n_shrink_children == n_possible_shrink_children) break; } /* OK, we found enough shrinkage, move it back upwards to the right position */ base_shrink += (shrink_so_far - total_shrink) / n_shrink_children; if (base_shrink < 0) /* can't shrink that much, probably round-off error */ base_shrink = 0; /* Assign the portion above the base shrink line to the shrink_amount */ for (i = 0; i < n_shrink_children; i++) shrinks[i].shrink_amount -= base_shrink; for (; i < n_children; i++) shrinks[i].shrink_amount = 0; /* And sort back to their original order */ qsort (shrinks, n_children, sizeof (BoxChildShrink), compare_by_child_index); return shrinks; } static void st_box_layout_allocate (ClutterActor *actor, const ClutterActorBox *box, ClutterAllocationFlags flags) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (actor)->priv; StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); ClutterActorBox content_box; gfloat avail_width, avail_height, min_width, natural_width, min_height, natural_height; gfloat position, next_position; GList *l; gint n_expand_children = 0, i; gfloat expand_amount, shrink_amount; BoxChildShrink *shrinks = NULL; gboolean flip = (st_widget_get_direction (ST_WIDGET (actor)) == ST_TEXT_DIRECTION_RTL) && (!priv->is_vertical); CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->allocate (actor, box, flags); if (priv->children == NULL) return; st_theme_node_get_content_box (theme_node, box, &content_box); avail_width = content_box.x2 - content_box.x1; avail_height = content_box.y2 - content_box.y1; get_content_preferred_width (ST_BOX_LAYOUT (actor), avail_height, &min_width, &natural_width); get_content_preferred_height (ST_BOX_LAYOUT (actor), MAX (avail_width, min_width), &min_height, &natural_height); /* update adjustments for scrolling */ if (priv->vadjustment) { gdouble prev_value; g_object_set (G_OBJECT (priv->vadjustment), "lower", 0.0, "upper", MAX (min_height, avail_height), "page-size", avail_height, "step-increment", avail_height / 6, "page-increment", avail_height - avail_height / 6, NULL); prev_value = st_adjustment_get_value (priv->vadjustment); st_adjustment_set_value (priv->vadjustment, prev_value); } if (priv->hadjustment) { gdouble prev_value; g_object_set (G_OBJECT (priv->hadjustment), "lower", 0.0, "upper", MAX (min_width, avail_width), "page-size", avail_width, "step-increment", avail_width / 6, "page-increment", avail_width - avail_width / 6, NULL); prev_value = st_adjustment_get_value (priv->hadjustment); st_adjustment_set_value (priv->hadjustment, prev_value); } if (avail_height < min_height) { avail_height = min_height; content_box.y2 = content_box.y1 + avail_height; } if (avail_width < min_width) { avail_width = min_width; content_box.x2 = content_box.x1 + avail_width; } if (priv->is_vertical) { expand_amount = MAX (0, avail_height - natural_height); shrink_amount = MAX (0, natural_height - avail_height); } else { expand_amount = MAX (0, avail_width - natural_width); shrink_amount = MAX (0, natural_width - avail_width); } if (expand_amount > 0) { /* count the number of children with expand set to TRUE */ n_expand_children = 0; for (l = priv->children; l; l = l->next) { ClutterActor *child = l->data; gboolean expand; if (!CLUTTER_ACTOR_IS_VISIBLE (child) || clutter_actor_get_fixed_position_set (child)) continue; clutter_container_child_get ((ClutterContainer *) actor, child, "expand", &expand, NULL); if (expand) n_expand_children++; } if (n_expand_children == 0) expand_amount = 0; } else if (shrink_amount > 0) { shrinks = compute_shrinks (ST_BOX_LAYOUT (actor), priv->is_vertical ? avail_width : avail_height, shrink_amount); } if (priv->is_vertical) position = content_box.y1; else if (flip) position = content_box.x2; else position = content_box.x1; if (priv->is_pack_start) { l = g_list_last (priv->children); i = g_list_length (priv->children); } else { l = priv->children; i = 0; } while (l) { ClutterActor *child = (ClutterActor*) l->data; ClutterActorBox child_box; gfloat child_min, child_nat, child_allocated; gboolean xfill, yfill, expand, fixed; StAlign xalign, yalign; if (!CLUTTER_ACTOR_IS_VISIBLE (child)) goto next_child; fixed = clutter_actor_get_fixed_position_set (child); if (fixed) { clutter_actor_allocate_preferred_size (child, flags); goto next_child; } clutter_container_child_get ((ClutterContainer*) actor, child, "x-fill", &xfill, "y-fill", &yfill, "x-align", &xalign, "y-align", &yalign, "expand", &expand, NULL); if (priv->is_vertical) { _st_actor_get_preferred_height (child, avail_width, xfill, &child_min, &child_nat); } else { _st_actor_get_preferred_width (child, avail_height, yfill, &child_min, &child_nat); } child_allocated = child_nat; if (expand_amount > 0 && expand) child_allocated += expand_amount / n_expand_children; else if (shrink_amount > 0) child_allocated -= shrinks[i].shrink_amount; if (flip) next_position = position - child_allocated; else next_position = position + child_allocated; if (priv->is_vertical) { child_box.y1 = (int)(0.5 + position); child_box.y2 = (int)(0.5 + next_position); child_box.x1 = content_box.x1; child_box.x2 = content_box.x2; _st_allocate_fill (ST_WIDGET (actor), child, &child_box, xalign, yalign, xfill, yfill); clutter_actor_allocate (child, &child_box, flags); } else { if (flip) { child_box.x1 = (int)(0.5 + next_position); child_box.x2 = (int)(0.5 + position); } else { child_box.x1 = (int)(0.5 + position); child_box.x2 = (int)(0.5 + next_position); } child_box.y1 = content_box.y1; child_box.y2 = content_box.y2; _st_allocate_fill (ST_WIDGET (actor), child, &child_box, xalign, yalign, xfill, yfill); clutter_actor_allocate (child, &child_box, flags); } if (flip) position = next_position - priv->spacing; else position = next_position + priv->spacing; next_child: if (priv->is_pack_start) { l = l->prev; i--; } else { l = l->next; i++; } } if (shrinks) g_free (shrinks); } static void st_box_layout_apply_transform (ClutterActor *a, CoglMatrix *m) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (a)->priv; gdouble x, y; CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->apply_transform (a, m); if (priv->hadjustment) x = st_adjustment_get_value (priv->hadjustment); else x = 0; if (priv->vadjustment) y = st_adjustment_get_value (priv->vadjustment); else y = 0; cogl_matrix_translate (m, (int) -x, (int) -y, 0); } static void st_box_layout_paint (ClutterActor *actor) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (actor)->priv; StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); GList *l; gdouble x, y; ClutterActorBox child_box; ClutterActorBox allocation_box; ClutterActorBox content_box; if (priv->hadjustment) x = st_adjustment_get_value (priv->hadjustment); else x = 0; if (priv->vadjustment) y = st_adjustment_get_value (priv->vadjustment); else y = 0; /* If we are translated, then we need to translate back before chaining * up or the background and borders will be drawn in the wrong place */ if (x != 0 || y != 0) { cogl_push_matrix (); cogl_translate ((int)x, (int)y, 0); } CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->paint (actor); if (x != 0 || y != 0) { cogl_pop_matrix (); } if (priv->children == NULL) return; clutter_actor_get_allocation_box (actor, &allocation_box); st_theme_node_get_content_box (theme_node, &allocation_box, &content_box); content_box.x1 += x; content_box.y1 += y; content_box.x2 += x; content_box.y2 += y; /* The content area forms the viewport into the scrolled contents, while * the borders and background stay in place; after drawing the borders and * background, we clip to the content area */ if (priv->hadjustment || priv->vadjustment) cogl_clip_push_rectangle ((int)content_box.x1, (int)content_box.y1, (int)content_box.x2, (int)content_box.y2); for (l = priv->children; l; l = g_list_next (l)) { ClutterActor *child = (ClutterActor*) l->data; if (!CLUTTER_ACTOR_IS_VISIBLE (child)) continue; clutter_actor_get_allocation_box (child, &child_box); if ((child_box.x1 < content_box.x2) && (child_box.x2 > content_box.x1) && (child_box.y1 < content_box.y2) && (child_box.y2 > content_box.y1)) { clutter_actor_paint (child); } } if (priv->hadjustment || priv->vadjustment) cogl_clip_pop (); } static void st_box_layout_pick (ClutterActor *actor, const ClutterColor *color) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (actor)->priv; StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); GList *l; gdouble x, y; ClutterActorBox child_box; ClutterActorBox allocation_box; ClutterActorBox content_box; if (priv->hadjustment) x = st_adjustment_get_value (priv->hadjustment); else x = 0; if (priv->vadjustment) y = st_adjustment_get_value (priv->vadjustment); else y = 0; if (x != 0 || y != 0) { cogl_push_matrix (); cogl_translate ((int)x, (int)y, 0); } CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->pick (actor, color); if (x != 0 || y != 0) { cogl_pop_matrix (); } if (priv->children == NULL) return; clutter_actor_get_allocation_box (actor, &allocation_box); st_theme_node_get_content_box (theme_node, &allocation_box, &content_box); content_box.x1 += x; content_box.y1 += y; content_box.x2 += x; content_box.y2 += y; if (priv->hadjustment || priv->vadjustment) cogl_clip_push_rectangle ((int)content_box.x1, (int)content_box.y1, (int)content_box.x2, (int)content_box.y2); for (l = priv->children; l; l = g_list_next (l)) { ClutterActor *child = (ClutterActor*) l->data; if (!CLUTTER_ACTOR_IS_VISIBLE (child)) continue; clutter_actor_get_allocation_box (child, &child_box); if ((child_box.x1 < content_box.x2) && (child_box.x2 > content_box.x1) && (child_box.y1 < content_box.y2) && (child_box.y2 > content_box.y1)) { clutter_actor_paint (child); } } if (priv->hadjustment || priv->vadjustment) cogl_clip_pop (); } static void st_box_layout_style_changed (StWidget *self) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (self)->priv; StThemeNode *theme_node = st_widget_get_theme_node (self); int old_spacing = priv->spacing; double spacing = 0; st_theme_node_get_length (theme_node, "spacing", FALSE, &spacing); priv->spacing = (int)(spacing + 0.5); if (priv->spacing != old_spacing) clutter_actor_queue_relayout (CLUTTER_ACTOR (self)); ST_WIDGET_CLASS (st_box_layout_parent_class)->style_changed (self); } static void st_box_layout_class_init (StBoxLayoutClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass); StWidgetClass *widget_class = ST_WIDGET_CLASS (klass); GParamSpec *pspec; g_type_class_add_private (klass, sizeof (StBoxLayoutPrivate)); object_class->get_property = st_box_layout_get_property; object_class->set_property = st_box_layout_set_property; object_class->dispose = st_box_layout_dispose; actor_class->allocate = st_box_layout_allocate; actor_class->get_preferred_width = st_box_layout_get_preferred_width; actor_class->get_preferred_height = st_box_layout_get_preferred_height; actor_class->apply_transform = st_box_layout_apply_transform; actor_class->paint = st_box_layout_paint; actor_class->pick = st_box_layout_pick; widget_class->style_changed = st_box_layout_style_changed; pspec = g_param_spec_boolean ("vertical", "Vertical", "Whether the layout should be vertical, rather" "than horizontal", FALSE, ST_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_VERTICAL, pspec); pspec = g_param_spec_boolean ("pack-start", "Pack Start", "Whether to pack items at the start of the box", FALSE, ST_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_PACK_START, pspec); /* StScrollable properties */ g_object_class_override_property (object_class, PROP_HADJUST, "hadjustment"); g_object_class_override_property (object_class, PROP_VADJUST, "vadjustment"); } static void st_box_layout_init (StBoxLayout *self) { self->priv = BOX_LAYOUT_PRIVATE (self); } /** * st_box_layout_new: * * Create a new #StBoxLayout. * * Returns: a newly allocated #StBoxLayout */ StWidget * st_box_layout_new (void) { return g_object_new (ST_TYPE_BOX_LAYOUT, NULL); } /** * st_box_layout_set_vertical: * @box: A #StBoxLayout * @vertical: %TRUE if the layout should be vertical * * Set the value of the #StBoxLayout::vertical property * */ void st_box_layout_set_vertical (StBoxLayout *box, gboolean vertical) { g_return_if_fail (ST_IS_BOX_LAYOUT (box)); if (box->priv->is_vertical != vertical) { box->priv->is_vertical = vertical; clutter_actor_queue_relayout ((ClutterActor*) box); g_object_notify (G_OBJECT (box), "vertical"); } } /** * st_box_layout_get_vertical: * @box: A #StBoxLayout * * Get the value of the #StBoxLayout::vertical property. * * Returns: %TRUE if the layout is vertical */ gboolean st_box_layout_get_vertical (StBoxLayout *box) { g_return_val_if_fail (ST_IS_BOX_LAYOUT (box), FALSE); return box->priv->is_vertical; } /** * st_box_layout_set_pack_start: * @box: A #StBoxLayout * @pack_start: %TRUE if the layout should use pack-start * * Set the value of the #StBoxLayout::pack-start property. * */ void st_box_layout_set_pack_start (StBoxLayout *box, gboolean pack_start) { g_return_if_fail (ST_IS_BOX_LAYOUT (box)); if (box->priv->is_pack_start != pack_start) { box->priv->is_pack_start = pack_start; clutter_actor_queue_relayout ((ClutterActor*) box); g_object_notify (G_OBJECT (box), "pack-start"); } } /** * st_box_layout_get_pack_start: * @box: A #StBoxLayout * * Get the value of the #StBoxLayout::pack-start property. * * Returns: %TRUE if pack-start is enabled */ gboolean st_box_layout_get_pack_start (StBoxLayout *box) { g_return_val_if_fail (ST_IS_BOX_LAYOUT (box), FALSE); return box->priv->is_pack_start; } static void st_box_layout_internal_remove_all (StBoxLayout *self, gboolean destroy) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (self)->priv; ClutterActor *child; while (priv->children) { child = priv->children->data; g_object_ref (child); priv->children = g_list_delete_link (priv->children, priv->children); clutter_actor_unparent (child); g_signal_emit_by_name (self, "actor-removed", child); if (destroy) clutter_actor_destroy (child); g_object_unref (child); } clutter_actor_queue_relayout ((ClutterActor*) self); } /** * st_box_layout_remove_all: * @self: * * Efficiently unparent all children currently in this box. */ void st_box_layout_remove_all (StBoxLayout *self) { st_box_layout_internal_remove_all (self, FALSE); } /** * st_box_layout_destroy_children: * @self: * * Efficiently unparent and destroy all children currently in this box. */ void st_box_layout_destroy_children (StBoxLayout *self) { st_box_layout_internal_remove_all (self, TRUE); } /** * st_box_layout_get_n_children: * @self: a #StBoxLayout * * Returns the number of children in this box. */ guint st_box_layout_get_n_children (StBoxLayout *self) { return g_list_length (self->priv->children); } void st_box_layout_move_child (StBoxLayout *self, ClutterActor *actor, int pos) { StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (self)->priv; GList *item = NULL; item = g_list_find (priv->children, actor); if (item == NULL) { g_warning ("Actor of type '%s' is not a child of the StBoxLayout container", g_type_name (G_OBJECT_TYPE (actor))); return; } priv->children = g_list_delete_link (priv->children, item); priv->children = g_list_insert (priv->children, actor, pos); clutter_actor_queue_relayout ((ClutterActor*) self); } void st_box_layout_insert_actor (StBoxLayout *self, ClutterActor *actor, int pos) { clutter_container_add_actor((ClutterContainer*) self, actor); st_box_layout_move_child(self, actor, pos); }