Handle scene graph invalidation

Change-Id: Icff592a4ae48444a36406a65c1c04a3a6da77616
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/quick/items/context2d/qquickcanvasitem.cpp b/src/quick/items/context2d/qquickcanvasitem.cpp
index 7d3be0865b..d184003b82 100644
--- a/src/quick/items/context2d/qquickcanvasitem.cpp
+++ b/src/quick/items/context2d/qquickcanvasitem.cpp
@@ -284,6 +284,7 @@ QQuickCanvasItem::QQuickCanvasItem(QQuickItem *parent)
     : QQuickItem(*(new QQuickCanvasItemPrivate), parent)
 {
     setFlag(ItemHasContents);
+    connect(this, SIGNAL(sceneGraphInvalidated()), this, SLOT(invalidateSG()));
 }
 
 QQuickCanvasItem::~QQuickCanvasItem()
@@ -606,6 +607,13 @@ void QQuickCanvasItem::releaseResources()
     }
 }
 
+void QQuickCanvasItem::invalidateSG()
+{
+    Q_D(QQuickCanvasItem);
+    d->context->deleteLater();
+    d->context = 0;
+}
+
 void QQuickCanvasItem::componentComplete()
 {
     QQuickItem::componentComplete();