static const GFlagsValue values[] = {
{ G_BINDING_DEFAULT, "G_BINDING_DEFAULT", "default" },
{ G_BINDING_BIDIRECTIONAL, "G_BINDING_BIDIRECTIONAL", "bidirectional" },
+ { G_BINDING_SYNC_CREATE, "G_BINDING_SYNC_CREATE", "sync-create" },
{ 0, NULL, NULL }
};
GType g_define_type_id =
binding->transform_data = user_data;
binding->notify = notify;
+ /* synchronize the target with the source by faking an emission of
+ * the ::notify signal for the source property; this will also take
+ * care of the bidirectional binding case because the eventual change
+ * will emit a notification on the target
+ */
+ if (flags & G_BINDING_SYNC_CREATE)
+ on_source_notify (binding->source, binding->source_pspec, binding);
+
return binding;
}
* @G_BINDING_BIDIRECTIONAL: Bidirectional binding; if either the
* property of the source or the property of the target changes,
* the other is updated
+ * @G_BINDING_SYNC_CREATE: Synchronize the values of the source and
+ * target properties when creating the binding; the direction of
+ * the synchronization is always from the source to the target
*
* Flags to be passed to g_object_bind_property() or
* g_object_bind_property_full().
typedef enum { /*< prefix=G_BINDING >*/
G_BINDING_DEFAULT = 0,
- G_BINDING_BIDIRECTIONAL = 1 << 0
+ G_BINDING_BIDIRECTIONAL = 1 << 0,
+ G_BINDING_SYNC_CREATE = 1 << 1
} GBindingFlags;
GType g_binding_flags_get_type (void) G_GNUC_CONST;
g_object_unref (c);
}
+static void
+binding_sync_create (void)
+{
+ BindingSource *source = g_object_new (binding_source_get_type (),
+ "foo", 42,
+ NULL);
+ BindingTarget *target = g_object_new (binding_target_get_type (),
+ "bar", 47,
+ NULL);
+ GBinding *binding;
+
+ binding = g_object_bind_property (source, "foo",
+ target, "bar",
+ G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE);
+
+ g_assert_cmpint (source->foo, ==, 42);
+ g_assert_cmpint (target->bar, ==, 42);
+
+ g_object_set (source, "foo", 47, NULL);
+ g_assert_cmpint (source->foo, ==, target->bar);
+
+ g_object_unref (binding);
+
+ g_object_set (target, "bar", 49, NULL);
+
+ binding = g_object_bind_property (source, "foo",
+ target, "bar",
+ G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+ g_assert_cmpint (source->foo, ==, 47);
+ g_assert_cmpint (target->bar, ==, 47);
+
+ g_object_unref (source);
+ g_object_unref (target);
+}
+
int
main (int argc, char *argv[])
{
g_test_add_func ("/binding/bidirectional", binding_bidirectional);
g_test_add_func ("/binding/transform", binding_transform);
g_test_add_func ("/binding/chain", binding_chain);
+ g_test_add_func ("/binding/sync-create", binding_sync_create);
return g_test_run ();
}