Add a test case for task QTBUG-4439.

Commit fc3dfc20d487cb4fd2f93bd9fa36eef85a7467a3 fixes the problem.
The unpolished items list was modified in between the iteration
which means that invokeMethod was never recall if you add an item
inside the polishEvent handler. The invokeMethod is called in addItem
only when the list is empty right before we add the item in the list.

Task-number:QTBUG-4439
Reviewed-by:TrustMe

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp b/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
index 26021e0..6b5ad09 100644
--- a/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
+++ b/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
@@ -159,6 +159,7 @@ private slots:
     void ensureClipping();
     void widgetSendsGeometryChanges();
     void respectHFW();
+    void addChildInpolishEvent();
 
     // Task fixes
     void task236127_bspTreeIndexFails();
@@ -2716,6 +2717,58 @@ void tst_QGraphicsWidget::respectHFW()
 #endif
 }
 
+class PolishWidget : public QGraphicsWidget
+{
+public:
+
+    PolishWidget(Qt::GlobalColor color, QGraphicsItem *parent=0) :
+    QGraphicsWidget(parent), mColor(color)
+    {
+    }
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
+    {
+        painter->setBrush(QBrush(mColor));
+        painter->drawRect(boundingRect());
+    }
+
+    void polishEvent()
+    {
+        if (!parentWidget()) {
+            //We add a child in the polish event for the parent
+            PolishWidget *childWidget = new PolishWidget(Qt::black, this);
+            childWidget->setGeometry(QRectF(10,10,30,30));
+        }
+
+        QGraphicsWidget::polishEvent();
+        mColor = Qt::red;
+        update();
+        numberOfPolish++;
+    }
+
+    static int numberOfPolish;
+
+private:
+    Qt::GlobalColor mColor;
+};
+
+int PolishWidget::numberOfPolish = 0;
+
+void tst_QGraphicsWidget::addChildInpolishEvent()
+{
+    QGraphicsScene scene;
+
+    PolishWidget *parentWidget = new PolishWidget(Qt::white);
+    scene.addItem(parentWidget);
+
+    QGraphicsView view(&scene);
+    view.resize(200, 200);
+    view.show();
+    QTest::qWaitForWindowShown(&view);
+    QCOMPARE(PolishWidget::numberOfPolish, 2);
+}
+
+
 QTEST_MAIN(tst_QGraphicsWidget)
 #include "tst_qgraphicswidget.moc"