[gtk+] gesturesingle: Ignore motion/updates from unhandled sequences

[Carlos Garnacho <carlosg src gnome org>]

commit 8bf5b175b1ed63d296b58cbe6e1c39ab2b9cff52
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Apr 13 16:15:11 2015 +0200

    gesturesingle: Ignore motion/updates from unhandled sequences
    
    This used to do the right thing, practically ignoring those event
    if they went all through the event handler, unless this motion event
    triggered the cancellation of this gesture from the event handler
    of another controllers.
    
    In this case, the controller would be reset, but the motion event
    would still go through its handler, setting again
    current_button/sequence as the motion event has buttons in its
    modifiers. This leaves GtkGestureSingle with inconsistent data
    that may interfere with future runs.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747469

 gtk/gtkgesturesingle.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkgesturesingle.c b/gtk/gtkgesturesingle.c
index 458bffe..5b595c5 100644
--- a/gtk/gtkgesturesingle.c
+++ b/gtk/gtkgesturesingle.c
@@ -169,6 +169,8 @@ gtk_gesture_single_handle_event (GtkEventController *controller,
       button = event->button.button;
       break;
     case GDK_MOTION_NOTIFY:
+      if (!gtk_gesture_handles_sequence (GTK_GESTURE (controller), sequence))
+        return FALSE;
       if (priv->touch_only && !test_touchscreen && source != GDK_SOURCE_TOUCHSCREEN)
         return FALSE;