[gtk+/gtk-3-16] scrolledwindow: Show scrollbars on tablet devices

[Carlos Garnacho <carlosg src gnome org>]

commit 527d64e68bbd919e90705034637dff3100b20627
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Apr 13 15:29:57 2015 +0200

    scrolledwindow: Show scrollbars on tablet devices
    
    The code managing scrollbars visibility was too pervasively checking for
    mouse devices, leaving pen/eraser/cursor devices with no scrollbars at
    all. Relax these checks a bit, and actually toggle full-width scrollbars
    on pen/eraser devices, so it is an easier target.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747608

 gtk/gtkscrolledwindow.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index b3e66b1..031d198 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -1125,8 +1125,8 @@ captured_event_cb (GtkWidget *widget,
   source_device = gdk_event_get_source_device (event);
   input_source = gdk_device_get_source (source_device);
 
-  if (input_source != GDK_SOURCE_MOUSE &&
-      input_source != GDK_SOURCE_TOUCHPAD)
+  if (input_source == GDK_SOURCE_KEYBOARD ||
+      input_source == GDK_SOURCE_TOUCHSCREEN)
     return GDK_EVENT_PROPAGATE;
 
   event_widget = gtk_get_event_widget (event);
@@ -1147,7 +1147,9 @@ captured_event_cb (GtkWidget *widget,
           indicator_set_over (&priv->hindicator, FALSE);
           indicator_set_over (&priv->vindicator, FALSE);
         }
-      else if (strstr (gdk_device_get_name (source_device), "TrackPoint") ||
+      else if (input_source == GDK_SOURCE_PEN ||
+               input_source == GDK_SOURCE_ERASER ||
+               strstr (gdk_device_get_name (source_device), "TrackPoint") ||
                strstr (gdk_device_get_name (source_device), "DualPoint Stick"))
         {
           indicator_set_over (&priv->hindicator, TRUE);