/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ /* * st-scroll-bar.c: Scroll bar actor * * Copyright 2008 OpenedHand * 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: Chris Lord * Port to St by: Robert Staudinger * */ /** * SECTION:st-scroll-bar * @short_description: a user interface element to control scrollable areas. * * The #StScrollBar allows users to scroll scrollable actors, either by * the step or page amount, or by manually dragging the handle. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "st-scroll-bar.h" #include "st-bin.h" #include "st-marshal.h" #include "st-enum-types.h" #include "st-private.h" #include "st-button.h" G_DEFINE_TYPE (StScrollBar, st_scroll_bar, ST_TYPE_BIN) #define ST_SCROLL_BAR_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), ST_TYPE_SCROLL_BAR, StScrollBarPrivate)) #define PAGING_INITIAL_REPEAT_TIMEOUT 500 #define PAGING_SUBSEQUENT_REPEAT_TIMEOUT 200 struct _StScrollBarPrivate { StAdjustment *adjustment; gulong capture_handler; gfloat x_origin; gfloat y_origin; ClutterActor *bw_stepper; ClutterActor *fw_stepper; ClutterActor *trough; ClutterActor *handle; gfloat move_x; gfloat move_y; /* Trough-click handling. */ enum { NONE, UP, DOWN } paging_direction; guint paging_source_id; guint paging_event_no; gboolean stepper_forward; guint stepper_source_id; ClutterAnimation *paging_animation; gboolean vertical; }; enum { PROP_0, PROP_ADJUSTMENT, PROP_VERTICAL }; enum { SCROLL_START, SCROLL_STOP, LAST_SIGNAL }; static guint signals[LAST_SIGNAL] = { 0, }; static gboolean handle_button_press_event_cb (ClutterActor *actor, ClutterButtonEvent *event, StScrollBar *bar); static void st_scroll_bar_get_property (GObject *gobject, guint prop_id, GValue *value, GParamSpec *pspec) { StScrollBarPrivate *priv = ST_SCROLL_BAR (gobject)->priv; switch (prop_id) { case PROP_ADJUSTMENT: g_value_set_object (value, priv->adjustment); break; case PROP_VERTICAL: g_value_set_boolean (value, priv->vertical); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec); break; } } static void st_scroll_bar_set_property (GObject *gobject, guint prop_id, const GValue *value, GParamSpec *pspec) { StScrollBar *bar = ST_SCROLL_BAR (gobject); switch (prop_id) { case PROP_ADJUSTMENT: st_scroll_bar_set_adjustment (bar, g_value_get_object (value)); break; case PROP_VERTICAL: bar->priv->vertical = g_value_get_boolean (value); if (bar->priv->vertical) { clutter_actor_set_name (CLUTTER_ACTOR (bar->priv->bw_stepper), "up-stepper"); clutter_actor_set_name (CLUTTER_ACTOR (bar->priv->fw_stepper), "down-stepper"); clutter_actor_set_name (CLUTTER_ACTOR (bar->priv->handle), "vhandle"); } else { clutter_actor_set_name (CLUTTER_ACTOR (bar->priv->fw_stepper), "forward-stepper"); clutter_actor_set_name (CLUTTER_ACTOR (bar->priv->bw_stepper), "backward-stepper"); clutter_actor_set_name (CLUTTER_ACTOR (bar->priv->handle), "hhandle"); } clutter_actor_queue_relayout ((ClutterActor*) gobject); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec); break; } } static void st_scroll_bar_dispose (GObject *gobject) { StScrollBar *bar = ST_SCROLL_BAR (gobject); StScrollBarPrivate *priv = bar->priv; if (priv->adjustment) st_scroll_bar_set_adjustment (bar, NULL); if (priv->handle) { g_signal_handlers_disconnect_by_func (priv->handle, G_CALLBACK (handle_button_press_event_cb), bar); clutter_actor_unparent (priv->handle); priv->handle = NULL; } if (priv->bw_stepper) { clutter_actor_unparent (priv->bw_stepper); priv->bw_stepper = NULL; } if (priv->fw_stepper) { clutter_actor_unparent (priv->fw_stepper); priv->fw_stepper = NULL; } if (priv->trough) { clutter_actor_unparent (priv->trough); priv->trough = NULL; } G_OBJECT_CLASS (st_scroll_bar_parent_class)->dispose (gobject); } static void st_scroll_bar_paint (ClutterActor *actor) { StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv; CLUTTER_ACTOR_CLASS (st_scroll_bar_parent_class)->paint (actor); clutter_actor_paint (priv->bw_stepper); clutter_actor_paint (priv->fw_stepper); clutter_actor_paint (priv->trough); if (priv->handle && CLUTTER_ACTOR_IS_VISIBLE (priv->handle)) clutter_actor_paint (priv->handle); } static void st_scroll_bar_pick (ClutterActor *actor, const ClutterColor *pick_color) { StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv; CLUTTER_ACTOR_CLASS (st_scroll_bar_parent_class)->pick (actor, pick_color); clutter_actor_paint (priv->bw_stepper); clutter_actor_paint (priv->fw_stepper); clutter_actor_paint (priv->trough); if (priv->handle && priv->adjustment) clutter_actor_paint (priv->handle); } static void st_scroll_bar_map (ClutterActor *actor) { StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv; CLUTTER_ACTOR_CLASS (st_scroll_bar_parent_class)->map (actor); clutter_actor_map (priv->bw_stepper); clutter_actor_map (priv->fw_stepper); clutter_actor_map (priv->trough); if (priv->handle) clutter_actor_map (priv->handle); } static void st_scroll_bar_unmap (ClutterActor *actor) { StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv; CLUTTER_ACTOR_CLASS (st_scroll_bar_parent_class)->unmap (actor); clutter_actor_unmap (priv->bw_stepper); clutter_actor_unmap (priv->fw_stepper); clutter_actor_unmap (priv->trough); if (priv->handle) clutter_actor_unmap (priv->handle); } static void st_scroll_bar_allocate (ClutterActor *actor, const ClutterActorBox *box, ClutterAllocationFlags flags) { StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv; StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); ClutterActorBox content_box, bw_box, fw_box, trough_box; gfloat bw_stepper_size, fw_stepper_size, min_size, natural_size; /* Chain up */ CLUTTER_ACTOR_CLASS (st_scroll_bar_parent_class)-> allocate (actor, box, flags); st_theme_node_get_content_box (theme_node, box, &content_box); if (priv->vertical) { gfloat width = content_box.x2 - content_box.x1; clutter_actor_get_preferred_height (priv->bw_stepper, width, &min_size, &natural_size); bw_stepper_size = MAX (min_size, natural_size); /* Backward stepper */ bw_box.x1 = content_box.x1; bw_box.y1 = content_box.y1; bw_box.x2 = content_box.x2; bw_box.y2 = bw_box.y1 + bw_stepper_size; clutter_actor_allocate (priv->bw_stepper, &bw_box, flags); clutter_actor_get_preferred_height (priv->fw_stepper, width, &min_size, &natural_size); fw_stepper_size = MAX (min_size, natural_size); /* Forward stepper */ fw_box.x1 = content_box.x1; fw_box.y1 = content_box.y2 - fw_stepper_size; fw_box.x2 = content_box.x2; fw_box.y2 = content_box.y2; clutter_actor_allocate (priv->fw_stepper, &fw_box, flags); /* Trough */ trough_box.x1 = content_box.x1; trough_box.y1 = content_box.y1 + bw_stepper_size; trough_box.x2 = content_box.x2; trough_box.y2 = content_box.y2 - fw_stepper_size; clutter_actor_allocate (priv->trough, &trough_box, flags); } else { gfloat height = content_box.y2 - content_box.y1; clutter_actor_get_preferred_width (priv->bw_stepper, height, &min_size, &natural_size); bw_stepper_size = MAX (min_size, natural_size); /* Backward stepper */ bw_box.x1 = content_box.x1; bw_box.y1 = content_box.y1; bw_box.x2 = bw_box.x1 + bw_stepper_size; bw_box.y2 = content_box.y2; clutter_actor_allocate (priv->bw_stepper, &bw_box, flags); clutter_actor_get_preferred_width (priv->fw_stepper, height, &min_size, &natural_size); fw_stepper_size = MAX (min_size, natural_size); /* Forward stepper */ fw_box.x1 = content_box.x2 - fw_stepper_size; fw_box.y1 = content_box.y1; fw_box.x2 = content_box.x2; fw_box.y2 = content_box.y2; clutter_actor_allocate (priv->fw_stepper, &fw_box, flags); /* Trough */ trough_box.x1 = content_box.x1 + bw_stepper_size; trough_box.y1 = content_box.y1; trough_box.x2 = content_box.x2 - fw_stepper_size; trough_box.y2 = content_box.y2; clutter_actor_allocate (priv->trough, &trough_box, flags); } if (priv->adjustment) { StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor)); float handle_size, position, avail_size, stepper_size; gdouble value, lower, upper, page_size, increment, min_size, max_size; ClutterActorBox handle_box = { 0, }; stepper_size = bw_stepper_size + fw_stepper_size; st_adjustment_get_values (priv->adjustment, &value, &lower, &upper, NULL, NULL, &page_size); if ((upper == lower) || (page_size >= (upper - lower))) increment = 1.0; else increment = page_size / (upper - lower); min_size = 32.; st_theme_node_get_length (theme_node, "min-size", FALSE, &min_size); max_size = G_MAXINT16; st_theme_node_get_length (theme_node, "max-size", FALSE, &max_size); if (upper - lower - page_size <= 0) position = 0; else position = (value - lower) / (upper - lower - page_size); if (priv->vertical) { avail_size = content_box.y2 - content_box.y1 - stepper_size; handle_size = increment * avail_size; handle_size = CLAMP (handle_size, min_size, max_size); handle_box.x1 = content_box.x1; handle_box.y1 = bw_box.y2 + position * (avail_size - handle_size); handle_box.x2 = content_box.x2; handle_box.y2 = handle_box.y1 + handle_size; } else { avail_size = content_box.x2 - content_box.x1 - stepper_size; handle_size = increment * avail_size; handle_size = CLAMP (handle_size, min_size, max_size); handle_box.x1 = bw_box.x2 + position * (avail_size - handle_size); handle_box.y1 = content_box.y1; handle_box.x2 = handle_box.x1 + handle_size; handle_box.y2 = content_box.y2; } /* snap to pixel */ handle_box.x1 = (int) handle_box.x1; handle_box.y1 = (int) handle_box.y1; handle_box.x2 = (int) handle_box.x2; handle_box.y2 = (int) handle_box.y2; clutter_actor_allocate (priv->handle, &handle_box, flags); } } static void st_scroll_bar_style_changed (StWidget *widget) { StScrollBarPrivate *priv = ST_SCROLL_BAR (widget)->priv; st_widget_style_changed (ST_WIDGET (priv->bw_stepper)); st_widget_style_changed (ST_WIDGET (priv->fw_stepper)); st_widget_style_changed (ST_WIDGET (priv->trough)); st_widget_style_changed (ST_WIDGET (priv->handle)); ST_WIDGET_CLASS (st_scroll_bar_parent_class)->style_changed (widget); } static void bar_reactive_notify_cb (GObject *gobject, GParamSpec *arg1, gpointer user_data) { StScrollBar *bar = ST_SCROLL_BAR (gobject); clutter_actor_set_reactive (bar->priv->handle, clutter_actor_get_reactive (CLUTTER_ACTOR (bar))); } static GObject* st_scroll_bar_constructor (GType type, guint n_properties, GObjectConstructParam *properties) { GObjectClass *gobject_class; GObject *obj; StScrollBar *bar; StScrollBarPrivate *priv; gobject_class = G_OBJECT_CLASS (st_scroll_bar_parent_class); obj = gobject_class->constructor (type, n_properties, properties); bar = ST_SCROLL_BAR (obj); priv = ST_SCROLL_BAR_GET_PRIVATE (bar); g_signal_connect (bar, "notify::reactive", G_CALLBACK (bar_reactive_notify_cb), NULL); return obj; } static gboolean st_scroll_bar_scroll_event (ClutterActor *actor, ClutterScrollEvent *event) { StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv; gdouble lower, step, upper, value; if (priv->adjustment) { g_object_get (priv->adjustment, "lower", &lower, "step-increment", &step, "upper", &upper, "value", &value, NULL); } else { return FALSE; } switch (event->direction) { case CLUTTER_SCROLL_UP: case CLUTTER_SCROLL_LEFT: if (value == lower) return FALSE; else st_adjustment_set_value (priv->adjustment, value - step); break; case CLUTTER_SCROLL_DOWN: case CLUTTER_SCROLL_RIGHT: if (value == upper) return FALSE; else st_adjustment_set_value (priv->adjustment, value + step); break; } return TRUE; } static void st_scroll_bar_class_init (StScrollBarClass *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 (StScrollBarPrivate)); object_class->get_property = st_scroll_bar_get_property; object_class->set_property = st_scroll_bar_set_property; object_class->dispose = st_scroll_bar_dispose; object_class->constructor = st_scroll_bar_constructor; actor_class->allocate = st_scroll_bar_allocate; actor_class->paint = st_scroll_bar_paint; actor_class->pick = st_scroll_bar_pick; actor_class->scroll_event = st_scroll_bar_scroll_event; actor_class->map = st_scroll_bar_map; actor_class->unmap = st_scroll_bar_unmap; widget_class->style_changed = st_scroll_bar_style_changed; g_object_class_install_property (object_class, PROP_ADJUSTMENT, g_param_spec_object ("adjustment", "Adjustment", "The adjustment", ST_TYPE_ADJUSTMENT, ST_PARAM_READWRITE)); pspec = g_param_spec_boolean ("vertical", "Vertical Orientation", "Vertical Orientation", FALSE, ST_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_VERTICAL, pspec); signals[SCROLL_START] = g_signal_new ("scroll-start", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (StScrollBarClass, scroll_start), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); signals[SCROLL_STOP] = g_signal_new ("scroll-stop", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (StScrollBarClass, scroll_stop), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); } static void move_slider (StScrollBar *bar, gfloat x, gfloat y) { StScrollBarPrivate *priv = bar->priv; gdouble position, lower, upper, page_size; gfloat ux, uy, pos, size; if (!priv->adjustment) return; if (!clutter_actor_transform_stage_point (priv->trough, x, y, &ux, &uy)) return; if (priv->vertical) size = clutter_actor_get_height (priv->trough) - clutter_actor_get_height (priv->handle); else size = clutter_actor_get_width (priv->trough) - clutter_actor_get_width (priv->handle); if (size == 0) return; if (priv->vertical) pos = uy - priv->y_origin; else pos = ux - priv->x_origin; pos = CLAMP (pos, 0, size); st_adjustment_get_values (priv->adjustment, NULL, &lower, &upper, NULL, NULL, &page_size); position = ((pos / size) * (upper - lower - page_size)) + lower; st_adjustment_set_value (priv->adjustment, position); } static gboolean handle_capture_event_cb (ClutterActor *trough, ClutterEvent *event, StScrollBar *bar) { if (clutter_event_type (event) == CLUTTER_MOTION) { move_slider (bar, ((ClutterMotionEvent*) event)->x, ((ClutterMotionEvent*) event)->y); } else if (clutter_event_type (event) == CLUTTER_BUTTON_RELEASE && ((ClutterButtonEvent*) event)->button == 1) { ClutterActor *stage, *target; stage = clutter_actor_get_stage(bar->priv->trough); if (bar->priv->capture_handler) { g_signal_handler_disconnect (stage, bar->priv->capture_handler); bar->priv->capture_handler = 0; } clutter_set_motion_events_enabled (TRUE); g_signal_emit (bar, signals[SCROLL_STOP], 0); /* check if the mouse pointer has left the handle during the drag and * remove the hover state if it has */ target = clutter_stage_get_actor_at_pos ((ClutterStage*) stage, CLUTTER_PICK_REACTIVE, ((ClutterButtonEvent*) event)->x, ((ClutterButtonEvent*) event)->y); if (target != bar->priv->handle) { st_widget_set_style_pseudo_class ((StWidget*) bar->priv->handle, NULL); } } return TRUE; } static gboolean handle_button_press_event_cb (ClutterActor *actor, ClutterButtonEvent *event, StScrollBar *bar) { StScrollBarPrivate *priv = bar->priv; if (event->button != 1) return FALSE; if (!clutter_actor_transform_stage_point (priv->handle, event->x, event->y, &priv->x_origin, &priv->y_origin)) return FALSE; /* Account for the scrollbar-trough-handle nesting. */ priv->x_origin += clutter_actor_get_x (priv->trough); priv->y_origin += clutter_actor_get_y (priv->trough); /* Turn off picking for motion events */ clutter_set_motion_events_enabled (FALSE); priv->capture_handler = g_signal_connect_after ( clutter_actor_get_stage (priv->trough), "captured-event", G_CALLBACK (handle_capture_event_cb), bar); g_signal_emit (bar, signals[SCROLL_START], 0); return TRUE; } static void animation_completed_cb (ClutterAnimation *animation, StScrollBarPrivate *priv) { g_object_unref (priv->paging_animation); priv->paging_animation = NULL; } static gboolean trough_paging_cb (StScrollBar *self) { gfloat handle_pos, event_pos, tx, ty; gdouble value; gdouble page_increment; gboolean ret; gulong mode; ClutterAnimation *a; GValue v = { 0, }; ClutterTimeline *t; if (self->priv->paging_event_no == 0) { /* Scroll on after initial timeout. */ mode = CLUTTER_EASE_OUT_CUBIC; ret = FALSE; self->priv->paging_event_no = 1; self->priv->paging_source_id = g_timeout_add ( PAGING_INITIAL_REPEAT_TIMEOUT, (GSourceFunc) trough_paging_cb, self); } else if (self->priv->paging_event_no == 1) { /* Scroll on after subsequent timeout. */ ret = FALSE; mode = CLUTTER_EASE_IN_CUBIC; self->priv->paging_event_no = 2; self->priv->paging_source_id = g_timeout_add ( PAGING_SUBSEQUENT_REPEAT_TIMEOUT, (GSourceFunc) trough_paging_cb, self); } else { /* Keep scrolling. */ ret = TRUE; mode = CLUTTER_LINEAR; self->priv->paging_event_no++; } /* Do the scrolling */ st_adjustment_get_values (self->priv->adjustment, &value, NULL, NULL, NULL, &page_increment, NULL); if (self->priv->vertical) handle_pos = clutter_actor_get_y (self->priv->handle); else handle_pos = clutter_actor_get_x (self->priv->handle); clutter_actor_transform_stage_point (CLUTTER_ACTOR (self->priv->trough), self->priv->move_x, self->priv->move_y, &tx, &ty); if (self->priv->vertical) event_pos = ty; else event_pos = tx; if (event_pos > handle_pos) { if (self->priv->paging_direction == NONE) { /* Remember direction. */ self->priv->paging_direction = DOWN; } if (self->priv->paging_direction == UP) { /* Scrolled far enough. */ return FALSE; } value += page_increment; } else { if (self->priv->paging_direction == NONE) { /* Remember direction. */ self->priv->paging_direction = UP; } if (self->priv->paging_direction == DOWN) { /* Scrolled far enough. */ return FALSE; } value -= page_increment; } if (self->priv->paging_animation) { clutter_animation_completed (self->priv->paging_animation); } /* FIXME: Creating a new animation for each scroll is probably not the best * idea, but it's a lot less involved than extenind the current animation */ a = self->priv->paging_animation = g_object_new (CLUTTER_TYPE_ANIMATION, "object", self->priv->adjustment, "duration", PAGING_SUBSEQUENT_REPEAT_TIMEOUT, "mode", mode, NULL); g_value_init (&v, G_TYPE_DOUBLE); g_value_set_double (&v, value); clutter_animation_bind (self->priv->paging_animation, "value", &v); t = clutter_animation_get_timeline (self->priv->paging_animation); g_signal_connect (a, "completed", G_CALLBACK (animation_completed_cb), self->priv); clutter_timeline_start (t); return ret; } static gboolean trough_button_press_event_cb (ClutterActor *actor, ClutterButtonEvent *event, StScrollBar *self) { g_return_val_if_fail (self, FALSE); if (event->button != 1) return FALSE; if (self->priv->adjustment == NULL) return FALSE; self->priv->move_x = event->x; self->priv->move_y = event->y; self->priv->paging_direction = NONE; self->priv->paging_event_no = 0; trough_paging_cb (self); return TRUE; } static gboolean trough_button_release_event_cb (ClutterActor *actor, ClutterButtonEvent *event, StScrollBar *self) { if (event->button != 1) return FALSE; if (self->priv->paging_source_id) { g_source_remove (self->priv->paging_source_id); self->priv->paging_source_id = 0; } return TRUE; } static gboolean trough_leave_event_cb (ClutterActor *actor, ClutterEvent *event, StScrollBar *self) { if (self->priv->paging_source_id) { g_source_remove (self->priv->paging_source_id); self->priv->paging_source_id = 0; return TRUE; } return FALSE; } static void stepper_animation_completed_cb (ClutterAnimation *a, gpointer data) { g_object_unref (a); } static void stepper_move_on (StScrollBarPrivate *priv, gint mode) { ClutterAnimation *a; ClutterTimeline *t; GValue v = { 0, }; double value, inc; a = g_object_new (CLUTTER_TYPE_ANIMATION, "object", priv->adjustment, "duration", PAGING_SUBSEQUENT_REPEAT_TIMEOUT, "mode", mode, NULL); g_signal_connect (a, "completed", G_CALLBACK (stepper_animation_completed_cb), NULL); g_object_get (priv->adjustment, "step-increment", &inc, "value", &value, NULL); if (priv->stepper_forward) value = value + inc; else value = value - inc; g_value_init (&v, G_TYPE_DOUBLE); g_value_set_double (&v, value); clutter_animation_bind (a, "value", &v); t = clutter_animation_get_timeline (a); clutter_timeline_start (t); } static gboolean stepper_button_subsequent_timeout (StScrollBarPrivate *priv) { stepper_move_on (priv, CLUTTER_LINEAR); return TRUE; } static gboolean stepper_button_repeat_timeout (StScrollBarPrivate *priv) { priv->stepper_source_id = 0; stepper_move_on (priv, CLUTTER_EASE_IN_CUBIC); priv->stepper_source_id = g_timeout_add (PAGING_SUBSEQUENT_REPEAT_TIMEOUT, (GSourceFunc) stepper_button_subsequent_timeout, priv); return FALSE; } static gboolean stepper_button_press_event_cb (ClutterActor *actor, ClutterButtonEvent *event, StScrollBar *bar) { StScrollBarPrivate *priv = bar->priv; if (event->button != 1) return FALSE; if (bar->priv->adjustment == NULL) return FALSE; bar->priv->stepper_forward = (actor == priv->fw_stepper); stepper_move_on (priv, CLUTTER_EASE_OUT_CUBIC); priv->stepper_source_id = g_timeout_add (PAGING_INITIAL_REPEAT_TIMEOUT, (GSourceFunc) stepper_button_repeat_timeout, priv); return TRUE; } static gboolean stepper_button_release_cb (ClutterActor *actor, ClutterButtonEvent *event, StScrollBar *self) { if (event->button != 1) return FALSE; g_source_remove (self->priv->stepper_source_id); return FALSE; } static void st_scroll_bar_notify_reactive (StScrollBar *self) { StScrollBarPrivate *priv = self->priv; gboolean reactive = CLUTTER_ACTOR_IS_REACTIVE (self); clutter_actor_set_reactive (CLUTTER_ACTOR (priv->bw_stepper), reactive); clutter_actor_set_reactive (CLUTTER_ACTOR (priv->fw_stepper), reactive); clutter_actor_set_reactive (CLUTTER_ACTOR (priv->trough), reactive); clutter_actor_set_reactive (CLUTTER_ACTOR (priv->handle), reactive); } static void st_scroll_bar_init (StScrollBar *self) { self->priv = ST_SCROLL_BAR_GET_PRIVATE (self); self->priv->bw_stepper = (ClutterActor *) st_button_new (); clutter_actor_set_name (CLUTTER_ACTOR (self->priv->bw_stepper), "backward-stepper"); clutter_actor_set_parent (CLUTTER_ACTOR (self->priv->bw_stepper), CLUTTER_ACTOR (self)); g_signal_connect (self->priv->bw_stepper, "button-press-event", G_CALLBACK (stepper_button_press_event_cb), self); g_signal_connect (self->priv->bw_stepper, "button-release-event", G_CALLBACK (stepper_button_release_cb), self); self->priv->fw_stepper = (ClutterActor *) st_button_new (); clutter_actor_set_name (CLUTTER_ACTOR (self->priv->fw_stepper), "forward-stepper"); clutter_actor_set_parent (CLUTTER_ACTOR (self->priv->fw_stepper), CLUTTER_ACTOR (self)); g_signal_connect (self->priv->fw_stepper, "button-press-event", G_CALLBACK (stepper_button_press_event_cb), self); g_signal_connect (self->priv->fw_stepper, "button-release-event", G_CALLBACK (stepper_button_release_cb), self); self->priv->trough = (ClutterActor *) st_bin_new (); clutter_actor_set_reactive ((ClutterActor *) self->priv->trough, TRUE); clutter_actor_set_name (CLUTTER_ACTOR (self->priv->trough), "trough"); clutter_actor_set_parent (CLUTTER_ACTOR (self->priv->trough), CLUTTER_ACTOR (self)); g_signal_connect (self->priv->trough, "button-press-event", G_CALLBACK (trough_button_press_event_cb), self); g_signal_connect (self->priv->trough, "button-release-event", G_CALLBACK (trough_button_release_event_cb), self); g_signal_connect (self->priv->trough, "leave-event", G_CALLBACK (trough_leave_event_cb), self); self->priv->handle = (ClutterActor *) st_button_new (); clutter_actor_set_name (CLUTTER_ACTOR (self->priv->handle), "hhandle"); clutter_actor_set_parent (CLUTTER_ACTOR (self->priv->handle), self->priv->trough); g_signal_connect (self->priv->handle, "button-press-event", G_CALLBACK (handle_button_press_event_cb), self); clutter_actor_set_reactive (CLUTTER_ACTOR (self), TRUE); g_signal_connect (self, "notify::reactive", G_CALLBACK (st_scroll_bar_notify_reactive), NULL); } StWidget * st_scroll_bar_new (StAdjustment *adjustment) { return g_object_new (ST_TYPE_SCROLL_BAR, "adjustment", adjustment, NULL); } void st_scroll_bar_set_adjustment (StScrollBar *bar, StAdjustment *adjustment) { StScrollBarPrivate *priv; g_return_if_fail (ST_IS_SCROLL_BAR (bar)); priv = bar->priv; if (priv->adjustment) { g_signal_handlers_disconnect_by_func (priv->adjustment, clutter_actor_queue_relayout, bar); g_signal_handlers_disconnect_by_func (priv->adjustment, clutter_actor_queue_relayout, bar); g_object_unref (priv->adjustment); priv->adjustment = NULL; } if (adjustment) { priv->adjustment = g_object_ref (adjustment); g_signal_connect_swapped (priv->adjustment, "notify::value", G_CALLBACK (clutter_actor_queue_relayout), bar); g_signal_connect_swapped (priv->adjustment, "changed", G_CALLBACK (clutter_actor_queue_relayout), bar); clutter_actor_queue_relayout (CLUTTER_ACTOR (bar)); } } /** * st_scroll_bar_get_adjustment: * @bar: a #StScrollbar * * Gets the adjustment object that stores the current position * of the scrollbar. * * Return value: (transfer none): the adjustment */ StAdjustment * st_scroll_bar_get_adjustment (StScrollBar *bar) { g_return_val_if_fail (ST_IS_SCROLL_BAR (bar), NULL); return bar->priv->adjustment; }