QmlDesigner.NodeInstances: Fix image rendering

Call DesignerSupport::updateDirtyNode() recursively for every item which is
not under our control.

Change-Id: Ie6c784965d1557ece81176fc405864f1328733f7
Reviewed-on: http://codereview.qt.nokia.com/3972Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/sgitemnodeinstance.cpp

@@ -184,14 +184,24 @@ bool SGItemNodeInstance::equalSGItem(QSGItem *item) const
     return item == sgItem();
 }
 
+void SGItemNodeInstance::updateDirtyNodeRecursive(QSGItem *parentItem) const
+{
+    DesignerSupport::updateDirtyNode(parentItem);
+
+    foreach (QSGItem *childItem, parentItem->childItems()) {
+        if (!nodeInstanceServer()->hasInstanceForObject(childItem))
+            updateDirtyNodeRecursive(childItem);
+    }
+}
+
 QImage SGItemNodeInstance::renderImage() const
 {
+    updateDirtyNodeRecursive(sgItem());
+
     QImage image = designerSupport()->renderImageForItem(sgItem());
 
     image = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
 
-    qDebug() << __FUNCTION__ << image.size();
-
     return image;
 }
 

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/sgitemnodeinstance.h

@@ -116,6 +116,7 @@ protected:
     void resetVertical();
     void refresh();
     QRectF boundingRectWithStepChilds(QSGItem *parentItem) const;
+    void updateDirtyNodeRecursive(QSGItem *parentItem) const;
 
 private: //variables
     bool m_hasHeight;