1 files changed, 144 insertions, 0 deletions
diff --git a/tests/auto/qwidget/tst_qwidget.cpp b/tests/auto/qwidget/tst_qwidget.cpp
index c000a12..758821b 100644
--- a/tests/auto/qwidget/tst_qwidget.cpp
+++ b/tests/auto/qwidget/tst_qwidget.cpp
@@ -239,7 +239,12 @@ private slots:
     void setFixedSize();
 
     void ensureCreated();
+    void winIdChangeEvent();
+#ifdef Q_OS_SYMBIAN
+    void reparentCausesChildWinIdChange();
+#else
     void persistentWinId();
+#endif
     void qobject_castInDestroyedSlot();
 
     void showHideEvent_data();
@@ -4348,6 +4353,144 @@ void tst_QWidget::ensureCreated()
     }
 }
 
+class WinIdChangeWidget : public QWidget {
+public:
+    WinIdChangeWidget(QWidget *p = 0)
+        : QWidget(p)
+        , m_winIdChangeEventCount(0)
+    {
+
+    }
+protected:
+    bool event(QEvent *e){
+        if(e->type() == QEvent::WinIdChange)
+            ++m_winIdChangeEventCount;
+        else
+            return QWidget::event(e);
+    }
+public:
+    int m_winIdChangeEventCount;
+};
+
+void tst_QWidget::winIdChangeEvent()
+{
+    {
+        // Transforming an alien widget into a native widget
+        WinIdChangeWidget widget;
+        const WId winIdBefore = widget.internalWinId();
+        const WId winIdAfter = widget.winId();
+        QVERIFY(winIdBefore != winIdAfter);
+        QCOMPARE(widget.m_winIdChangeEventCount, 1);
+    }
+
+    {
+        // Changing parent of a native widget
+        QWidget parent1, parent2;
+        WinIdChangeWidget child(&parent1);
+        const WId winIdBefore = child.winId();
+        QCOMPARE(child.m_winIdChangeEventCount, 1);
+        child.setParent(&parent2);
+        const WId winIdAfter = child.internalWinId();
+#ifdef Q_OS_SYMBIAN
+        QVERIFY(winIdBefore != winIdAfter);
+        QCOMPARE(child.m_winIdChangeEventCount, 2);
+#else
+        QCOMPARE(winIdBefore, winIdAfter);
+        QCOMPARE(child.m_winIdChangeEventCount, 1);
+#endif
+    }
+
+    {
+        // Changing parent of an alien widget
+        QWidget parent1, parent2;
+        WinIdChangeWidget child(&parent1);
+        const WId winIdBefore = child.internalWinId();
+        child.setParent(&parent2);
+        const WId winIdAfter = child.internalWinId();
+        QCOMPARE(winIdBefore, winIdAfter);
+        QCOMPARE(child.m_winIdChangeEventCount, 0);
+    }
+
+    {
+        // Making native child widget into a top-level window
+        QWidget parent;
+        WinIdChangeWidget child(&parent);
+        child.winId();
+        const WId winIdBefore = child.internalWinId();
+        QCOMPARE(child.m_winIdChangeEventCount, 1);
+        const Qt::WindowFlags flags = child.windowFlags();
+        child.setWindowFlags(flags | Qt::Window);
+        const WId winIdAfter = child.internalWinId();
+        QVERIFY(winIdBefore != winIdAfter);
+        QCOMPARE(child.m_winIdChangeEventCount, 2);
+    }
+}
+
+#ifdef Q_OS_SYMBIAN
+void tst_QWidget::reparentCausesChildWinIdChange()
+{
+    QWidget *parent = new QWidget;
+    QWidget *w1 = new QWidget;
+    QWidget *w2 = new QWidget;
+    QWidget *w3 = new QWidget;
+    w1->setParent(parent);
+    w2->setParent(w1);
+    w3->setParent(w2);
+
+    WId winId1 = w1->winId();
+    WId winId2 = w2->winId();
+    WId winId3 = w3->winId();
+
+    // reparenting causes winIds of the widget being reparented, and all of its children, to change
+    w1->setParent(0);
+    QVERIFY(w1->winId() != winId1);
+    winId1 = w1->winId();
+    QVERIFY(w2->winId() != winId2);
+    winId2 = w2->winId();
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w1->setParent(parent);
+    QVERIFY(w1->winId() != winId1);
+    winId1 = w1->winId();
+    QVERIFY(w2->winId() != winId2);
+    winId2 = w2->winId();
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w2->setParent(0);
+    QVERIFY(w2->winId() != winId2);
+    winId2 = w2->winId();
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w2->setParent(parent);
+    QVERIFY(w2->winId() != winId2);
+    winId2 = w2->winId();
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w2->setParent(w1);
+    QVERIFY(w2->winId() != winId2);
+    winId2 = w2->winId();
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w3->setParent(0);
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w3->setParent(w1);
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    w3->setParent(w2);
+    QVERIFY(w3->winId() != winId3);
+    winId3 = w3->winId();
+
+    delete parent;
+}
+#else
 void tst_QWidget::persistentWinId()
 {
     QWidget *parent = new QWidget;
@@ -4404,6 +4547,7 @@ void tst_QWidget::persistentWinId()
 
     delete parent;
 }
+#endif // Q_OS_SYMBIAN
 
 class ShowHideEventWidget : public QWidget
 {