[gtk+/multitouch: 25/123] scrolledwindow: Only do kinetic scrolling on touch devices

[Carlos Garnacho <carlosg src gnome org>]

commit 4bfbcf476a15645702c72420898d523ff65171f1
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Nov 1 12:52:50 2011 +0100

    scrolledwindow: Only do kinetic scrolling on touch devices
    
    This is sort of meaningless on pointer devices, besides it implies
    a different input event handling on child widgets that's unnecessary
    there.

 gtk/gtkscrolledwindow.c |   14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index 95d1126..3a8de64 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -495,9 +495,10 @@ gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
   /**
    * GtkScrolledWindow:kinetic-scrolling:
    *
-   * Whether kinetic scrolling mode is enabled.
+   * Whether kinetic scrolling mode is enabled,
+   * only applies to devices with source %GDK_SOURCE_TOUCH
    *
-   * Since: 3.2
+   * Since: 3.4
    */
   g_object_class_install_property (gobject_class,
                                    PROP_KINETIC_SCROLLING,
@@ -3041,11 +3042,18 @@ gtk_scrolled_window_button_press_event (GtkWidget *widget,
   gint threshold;
   GtkWidget *event_widget;
   GdkEventButton *event;
-  GdkDevice *device;
+  GdkDevice *device, *source_device;
+  GdkInputSource source;
 
   if (_event->type != GDK_BUTTON_PRESS)
     return FALSE;
 
+  source_device = gdk_event_get_source_device (_event);
+  source = gdk_device_get_source (source_device);
+
+  if (source != GDK_SOURCE_TOUCH)
+    return FALSE;
+
   event = (GdkEventButton *)_event;
 
   if (event->button != 1)