[gtk+/gestures: 69/202] gesture: Add grouping API
- From: Carlos Garnacho <carlosg src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/gestures: 69/202] gesture: Add grouping API
- Date: Fri, 23 May 2014 18:02:10 +0000 (UTC)
commit b0a23dbfbdafe83daee16517875a8c2b532af121
Author: Carlos Garnacho <carlosg gnome org>
Date: Tue Apr 8 20:47:38 2014 +0200
gesture: Add grouping API
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.
gtk/gtkgesture.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
gtk/gtkgesture.h | 13 ++++++++
2 files changed, 104 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkgesture.c b/gtk/gtkgesture.c
index 49a1de0..f287ce1 100644
--- a/gtk/gtkgesture.c
+++ b/gtk/gtkgesture.c
@@ -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)
diff --git a/gtk/gtkgesture.h b/gtk/gtkgesture.h
index e5976d1..762dde7 100644
--- a/gtk/gtkgesture.h
+++ b/gtk/gtkgesture.h
@@ -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__ */
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