[gtk+] scrolledwindow: Don't hover the scrollbars while a button is being pressed

[Carlos Garnacho <carlosg src gnome org>]

commit 6b82ad48f65add2ae10392c65c431975dc969a69
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Feb 5 17:16:21 2015 +0100

    scrolledwindow: Don't hover the scrollbars while a button is being pressed
    
    This avoids showing the scrollbars if we are positive the child widget
    is being manipulated, regardless of the pointer being close to any of these.
    On the next motion event after finishing the operation, the scrollbar will
    be shown if necessary.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=743894

 gtk/gtkscrolledwindow.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
index d469668..84fa957 100644
--- a/gtk/gtkscrolledwindow.c
+++ b/gtk/gtkscrolledwindow.c
@@ -1090,7 +1090,13 @@ captured_event_cb (GtkWidget *widget,
       indicator_start_fade (&priv->hindicator, 1.0);
       indicator_start_fade (&priv->vindicator, 1.0);
 
-      if (strstr (gdk_device_get_name (source_device), "TrackPoint"))
+      if ((event->motion.state &
+           (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)) != 0)
+        {
+          indicator_set_over (&priv->hindicator, FALSE);
+          indicator_set_over (&priv->vindicator, FALSE);
+        }
+      else if (strstr (gdk_device_get_name (source_device), "TrackPoint"))
         {
           indicator_set_over (&priv->hindicator, TRUE);
           indicator_set_over (&priv->vindicator, TRUE);