Enable pan gesture on all QAbstractScrollArea-based widgets.

Two-finger panning will work on all QAbstractScrollArea based widgets, however
single-finger panning will be enabled only on some special widgets that always
wants it - for example we don't want it on QGraphicsView, and we might want it
on itemviews *sometimes*.

Reviewed-by: trustme

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gui/kernel/qwidget_win.cpp b/src/gui/kernel/qwidget_win.cpp
index 6647f3f..d8bee55 100644
--- a/src/gui/kernel/qwidget_win.cpp
+++ b/src/gui/kernel/qwidget_win.cpp
@@ -2056,6 +2056,8 @@ void QWidgetPrivate::registerTouchWindow()
 void QWidgetPrivate::winSetupGestures()
 {
     Q_Q(QWidget);
+    if (!q)
+        return;
     QApplicationPrivate *qAppPriv = getQApplicationPrivateInternal();
     bool needh = false;
     bool needv = false;
@@ -2097,6 +2099,7 @@ void QWidgetPrivate::winSetupGestures()
             gc[1].dwWant = GC_ZOOM;
             gc[1].dwBlock = 0;
         }
+        Q_ASSERT(winid);
         qAppPriv->SetGestureConfig(winid, 0, sizeof(gc)/sizeof(gc[0]), gc, sizeof(gc[0]));
     }
 }