AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity

gesture: Add grouping API

Browse Source 
This API eliminates the need for overriding
GtkWidget::sequence-state-changed virtually everywhere. Grouped
gestures share common states for a same GdkEventSequence, so the
state of sequences stay in sync across those.
This commit is contained in:
Carlos Garnacho 2014-04-08 20:47:38 +02:00
parent 6433a5452e
commit b0a23dbfbd
2 changed files with 104 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

91
gtk/gtkgesture.c
View File

@ -58,6 +58,7 @@ struct _GtkGesturePrivate
GdkWindow *user_window;
GdkWindow *window;
GdkDevice *device;
GList *group_link;
guint n_points;
guint recognized : 1;
};
@ -554,6 +555,8 @@ gtk_gesture_init (GtkGesture *gesture)
(GDestroyNotify) g_free);
gtk_event_controller_set_event_mask (GTK_EVENT_CONTROLLER (gesture),
GDK_TOUCH_MASK);
priv->group_link = g_list_prepend (NULL, gesture);
}
/**
@ -1169,6 +1172,94 @@ gtk_gesture_set_window (GtkGesture *gesture,
g_object_notify (G_OBJECT (gesture), "window");
}
GList *
_gtk_gesture_get_group_link (GtkGesture *gesture)
{
GtkGesturePrivate *priv;
priv = gtk_gesture_get_instance_private (gesture);
return priv->group_link;
}
void
gtk_gesture_group (GtkGesture *gesture,
GtkGesture *group_gesture)
{
GList *link, *group_link, *next;
g_return_if_fail (GTK_IS_GESTURE (gesture));
g_return_if_fail (GTK_IS_GESTURE (group_gesture));
g_return_if_fail (gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (group_gesture)) ==
gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)));
link = _gtk_gesture_get_group_link (gesture);
if (link->prev || link->next)
{
if (gtk_gesture_is_grouped_with (gesture, group_gesture))
return;
gtk_gesture_ungroup (gesture);
}
group_link = _gtk_gesture_get_group_link (group_gesture);
next = group_link->next;
/* Rewire link so it's inserted after the group_gesture elem */
link->prev = group_link;
link->next = next;
group_link->next = link;
if (next)
next->prev = link;
}
void
gtk_gesture_ungroup (GtkGesture *gesture)
{
GList *link, *prev, *next;
g_return_if_fail (GTK_IS_GESTURE (gesture));
link = _gtk_gesture_get_group_link (gesture);
prev = link->prev;
next = link->next;
/* Detach link from the group chain */
if (prev)
prev->next = next;
if (next)
next->prev = prev;
link->next = link->prev = NULL;
}
GList *
gtk_gesture_get_group (GtkGesture *gesture)
{
GList *link;
g_return_val_if_fail (GTK_IS_GESTURE (gesture), NULL);
link = _gtk_gesture_get_group_link (gesture);
return g_list_copy (g_list_first (link));
}
gboolean
gtk_gesture_is_grouped_with (GtkGesture *gesture,
GtkGesture *other)
{
GList *link;
g_return_val_if_fail (GTK_IS_GESTURE (gesture), FALSE);
g_return_val_if_fail (GTK_IS_GESTURE (other), FALSE);
link = _gtk_gesture_get_group_link (gesture);
link = g_list_first (link);
return g_list_find (link, other) != NULL;
}
gboolean
_gtk_gesture_handled_sequence_press (GtkGesture *gesture,
GdkEventSequence *sequence)

13
gtk/gtkgesture.h
View File

@ -136,6 +136,19 @@ GDK_AVAILABLE_IN_3_14
void gtk_gesture_set_window (GtkGesture *gesture,
GdkWindow *window);
GDK_AVAILABLE_IN_3_14
void gtk_gesture_group (GtkGesture *group_gesture,
GtkGesture *gesture);
GDK_AVAILABLE_IN_3_14
void gtk_gesture_ungroup (GtkGesture *gesture);
GDK_AVAILABLE_IN_3_14
GList * gtk_gesture_get_group (GtkGesture *gesture);
GDK_AVAILABLE_IN_3_14
gboolean gtk_gesture_is_grouped_with (GtkGesture *gesture,
GtkGesture *other);
G_END_DECLS
#endif /* __GTK_GESTURE_H__ */