[gtk+/gtk-3-16] gesturesingle: Ignore motion/updates from unhandled sequences

[Carlos Garnacho <carlosg src gnome org>]

commit 272f43cae7fbf9f19c5063c1989f490538e6a4a6
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;