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StScrollbar: clean up properly when unmapped during scroll

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If we're unmapped (or destroyed) during a scroll, we want to clean
up the changes we've made to Clutter's event handling, remove our
signal handler, and emit ::scroll-stop.

https://bugzilla.gnome.org/show_bug.cgi?id=646825
This commit is contained in:
Owen W. Taylor 2011-04-05 10:54:28 -04:00
parent d6c3868a7c
commit b9828bf5de
1 changed files with 22 additions and 12 deletions
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34
src/st/st-scroll-bar.c
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@ -110,6 +110,8 @@ handle_button_press_event_cb (ClutterActor *actor,
ClutterButtonEvent *event,
StScrollBar *bar);
static void stop_scrolling (StScrollBar *bar);
static void
st_scroll_bar_get_property (GObject *gobject,
guint prop_id,
@ -271,6 +273,8 @@ st_scroll_bar_unmap (ClutterActor *actor)
CLUTTER_ACTOR_CLASS (st_scroll_bar_parent_class)->unmap (actor);
stop_scrolling (ST_SCROLL_BAR (actor));
clutter_actor_unmap (priv->bw_stepper);
clutter_actor_unmap (priv->fw_stepper);
clutter_actor_unmap (priv->trough);
@ -806,6 +810,22 @@ move_slider (StScrollBar *bar,
st_adjustment_set_value (priv->adjustment, position);
}
static void
stop_scrolling (StScrollBar *bar)
{
ClutterActor *stage;
if (!bar->priv->capture_handler)
return;
stage = clutter_actor_get_stage (bar->priv->trough);
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);
}
static gboolean
handle_capture_event_cb (ClutterActor *trough,
ClutterEvent *event,
@ -822,19 +842,11 @@ handle_capture_event_cb (ClutterActor *trough,
{
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);
stop_scrolling (bar);
/* check if the mouse pointer has left the handle during the drag and
* remove the hover state if it has */
stage = clutter_actor_get_stage (bar->priv->trough);
target = clutter_stage_get_actor_at_pos ((ClutterStage*) stage,
CLUTTER_PICK_REACTIVE,
((ClutterButtonEvent*) event)->x,
@ -843,8 +855,6 @@ handle_capture_event_cb (ClutterActor *trough,
{
st_widget_remove_style_pseudo_class ((StWidget*) bar->priv->handle, "hover");
}
}
return TRUE;