gtk: Run GtkWidgetClass event signals inside a GtkEventController

This will allow further cleanups and optimizations in capture/target/bubble
event delivery. For simplicity, ATM every widget will receive its own
GtkEventControllerLegacy, it could be desirable to add finer control over
this in the future, so widgets that fully use event controllers for input
management can do away without this legacy piece.

1 files changed, 56 insertions, 0 deletions

diff --git a/gtk/gtkeventcontrollerlegacy.c b/gtk/gtkeventcontrollerlegacy.c
new file mode 100644
index 0000000000..737312d874
--- /dev/null
+++ b/gtk/gtkeventcontrollerlegacy.c
@@ -0,0 +1,56 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2017, Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author(s): Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#include "config.h"
+#include "gtkeventcontrollerlegacyprivate.h"
+
+G_DEFINE_TYPE (GtkEventControllerLegacy, _gtk_event_controller_legacy,
+               GTK_TYPE_EVENT_CONTROLLER)
+
+static gboolean
+gtk_event_controller_legacy_handle_event (GtkEventController *controller,
+                                          const GdkEvent     *event)
+{
+  GtkWidget *widget = gtk_event_controller_get_widget (controller);
+
+  return gtk_widget_emit_event_signals (widget, event);
+}
+
+static void
+_gtk_event_controller_legacy_class_init (GtkEventControllerLegacyClass *klass)
+{
+  GtkEventControllerClass *controller_class = GTK_EVENT_CONTROLLER_CLASS (klass);
+
+  controller_class->handle_event = gtk_event_controller_legacy_handle_event;
+}
+
+static void
+_gtk_event_controller_legacy_init (GtkEventControllerLegacy *controller)
+{
+}
+
+GtkEventController *
+_gtk_event_controller_legacy_new (GtkWidget *widget)
+{
+  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
+
+  return g_object_new (GTK_TYPE_EVENT_CONTROLLER_LEGACY,
+                       "widget", widget,
+                       NULL);
+}