GList*
_gdk_event_queue_find_first (GdkDisplay *display)
{
- GList *tmp_list = display->queued_events;
+ GList *tmp_list;
+ GList *pending_motion = NULL;
+
+ if (display->event_pause_count > 0)
+ return NULL;
+ tmp_list = display->queued_events;
while (tmp_list)
{
GdkEventPrivate *event = tmp_list->data;
- if (!(event->flags & GDK_EVENT_PENDING))
- return tmp_list;
+
+ if (event->flags & GDK_EVENT_PENDING)
+ continue;
+
+ if (pending_motion)
+ return pending_motion;
+
+ if (event->event.type == GDK_MOTION_NOTIFY && !display->flushing_events)
+ pending_motion = tmp_list;
+ else
+ return tmp_list;
tmp_list = g_list_next (tmp_list);
}
}
/**
- * _gdk_event_queue_insert_after:
+ * _gdk_event_queue_insert_before:
* @display: a #GdkDisplay
- * @sibling: Append after this event.
- * @event: Event to append.
+ * @sibling: Append before this event
+ * @event: Event to prepend
*
- * Appends an event before the specified event, or if it isn't in
- * the queue, onto the tail of the event queue.
+ * Prepends an event before the specified event, or if it isn't in
+ * the queue, onto the head of the event queue.
*
- * Returns: the newly appended list node.
+ * Returns: the newly prepended list node.
*
* Since: 2.16
*/
return event;
}
+void
+_gdk_event_queue_handle_motion_compression (GdkDisplay *display)
+{
+ GList *tmp_list;
+ GList *pending_motions = NULL;
+ GdkWindow *pending_motion_window = NULL;
+ GdkDevice *pending_motion_device = NULL;
+
+ /* If the last N events in the event queue are motion notify
+ * events for the same window, drop all but the last */
+
+ tmp_list = display->queued_tail;
+
+ while (tmp_list)
+ {
+ GdkEventPrivate *event = tmp_list->data;
+
+ if (event->flags & GDK_EVENT_PENDING)
+ break;
+
+ if (event->event.type != GDK_MOTION_NOTIFY)
+ break;
+
+ if (pending_motion_window != NULL &&
+ pending_motion_window != event->event.motion.window)
+ break;
+
+ if (pending_motion_device != NULL &&
+ pending_motion_device != event->event.motion.device)
+ break;
+
+ pending_motion_window = event->event.motion.window;
+ pending_motion_device = event->event.motion.device;
+ pending_motions = tmp_list;
+
+ tmp_list = tmp_list->prev;
+ }
+
+ while (pending_motions && pending_motions->next != NULL)
+ {
+ GList *next = pending_motions->next;
+ display->queued_events = g_list_delete_link (display->queued_events,
+ pending_motions);
+ pending_motions = next;
+ }
+
+ if (pending_motions &&
+ pending_motions == display->queued_events &&
+ pending_motions == display->queued_tail)
+ {
+ GdkFrameClock *clock = gdk_window_get_frame_clock (pending_motion_window);
+ gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_FLUSH_EVENTS);
+ }
+}
+
/**
* gdk_event_handler_set:
* @func: the function to call to handle events from GDK.
new_event->scroll.y = 0.;
new_event->scroll.x_root = 0.;
new_event->scroll.y_root = 0.;
+ new_event->scroll.delta_x = 0.;
+ new_event->scroll.delta_y = 0.;
break;
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
switch (event->type)
{
case GDK_SCROLL:
- dir = event->scroll.direction;
+ if (event->scroll.direction == GDK_SCROLL_SMOOTH)
+ fetched = FALSE;
+ else
+ dir = event->scroll.direction;
break;
default:
fetched = FALSE;
return fetched;
}
+/**
+ * gdk_event_get_scroll_deltas:
+ * @event: a #GdkEvent
+ * @delta_x: (out): return location for X delta
+ * @delta_y: (out): return location for Y delta
+ *
+ * Retrieves the scroll deltas from a #GdkEvent
+ *
+ * Returns: %TRUE if the event contains smooth scroll information
+ *
+ * Since: 3.4
+ **/
+gboolean
+gdk_event_get_scroll_deltas (const GdkEvent *event,
+ gdouble *delta_x,
+ gdouble *delta_y)
+{
+ gboolean fetched = TRUE;
+ gdouble dx = 0.0;
+ gdouble dy = 0.0;
+
+ switch (event->type)
+ {
+ case GDK_SCROLL:
+ if (event->scroll.direction == GDK_SCROLL_SMOOTH)
+ {
+ dx = event->scroll.delta_x;
+ dy = event->scroll.delta_y;
+ }
+ else
+ fetched = FALSE;
+ break;
+ default:
+ fetched = FALSE;
+ break;
+ }
+
+ if (delta_x)
+ *delta_x = dx;
+
+ if (delta_y)
+ *delta_y = dy;
+
+ return fetched;
+}
+
/**
* gdk_event_get_axis:
* @event: a #GdkEvent