[gtk+] button: Fix ::clicked emission on touchscreens sending pointer events

[Carlos Garnacho <carlosg src gnome org>]

commit d17fd81d9b631acf76273b9dca2700250cbbe096
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Sep 25 15:24:46 2014 +0200

    button: Fix ::clicked emission on touchscreens sending pointer events
    
    When GtkGestureMultiPress::released happens, in_button should be unset
    after emitting GtkButton::released, whose default implementation uses it.
    Moreover, in_button should only be unset there for real touch events, not
    guaranteed to trigger crossing events, as opposed to every pointer/touch
    events from touchscreens.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=737297

 gtk/gtkbutton.c |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)
---
diff --git a/gtk/gtkbutton.c b/gtk/gtkbutton.c
index 4f0fdc1..207bcbc 100644
--- a/gtk/gtkbutton.c
+++ b/gtk/gtkbutton.c
@@ -607,18 +607,16 @@ multipress_released_cb (GtkGestureMultiPress *gesture,
   GtkButton *button = GTK_BUTTON (widget);
   GtkButtonPrivate *priv = button->priv;
   GdkEventSequence *sequence;
-  const GdkEvent *event;
-  GdkDevice *source;
+
+  g_signal_emit (button, button_signals[RELEASED], 0);
 
   sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
-  event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
-  if (event)
+
+  if (sequence)
     {
-      source = gdk_event_get_source_device (event);
-      if (source && gdk_device_get_source (source) == GDK_SOURCE_TOUCHSCREEN)
-        priv->in_button = FALSE;
+      priv->in_button = FALSE;
+      gtk_button_update_state (button);
     }
-  g_signal_emit (button, button_signals[RELEASED], 0);
 }
 
 static void