Introducing QQuickItem::sceneGraphInvalidated/sceneGraphInitialized

[ChangeLog][QtQuick][QQuickItem] Added signals sceneGraphInitialized and sceneGraphInvalidated

Change-Id: Idaea88bc743f0637d093cf1ba7ac4f78acd7e6ad
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickitem/tst_qquickitem.cpp b/tests/auto/quick/qquickitem/tst_qquickitem.cpp
index 40327b0666..5993008c4a 100644
--- a/tests/auto/quick/qquickitem/tst_qquickitem.cpp
+++ b/tests/auto/quick/qquickitem/tst_qquickitem.cpp
@@ -52,6 +52,7 @@
 #include <QQmlEngine>
 #include "../../shared/util.h"
 #include "../shared/viewtestutil.h"
+#include <QSignalSpy>
 
 class TestItem : public QQuickItem
 {
@@ -172,6 +173,8 @@ private slots:
     void visualParentOwnership();
     void visualParentOwnershipWindow();
 
+    void testSGInitializeAndInvalidate();
+
 private:
 
     enum PaintOrderOp {
@@ -1883,6 +1886,37 @@ void tst_qquickitem::visualParentOwnershipWindow()
     }
 }
 
+void tst_qquickitem::testSGInitializeAndInvalidate()
+{
+    for (int i=0; i<2; ++i) {
+        QScopedPointer<QQuickView> view(new QQuickView());
+
+        QQuickItem *item = new QQuickItem();
+
+        int expected;
+        if (i == 0) {
+            // First iteration, item has contents and should get signals
+            expected = 1;
+            item->setFlag(QQuickItem::ItemHasContents, true);
+        } else {
+            // Second iteration, item does not have content and will not get signals
+            expected = 0;
+        }
+
+        QSignalSpy initializeSpy(item, SIGNAL(sceneGraphInitialized()));
+        QSignalSpy invalidateSpy(item, SIGNAL(sceneGraphInvalidated()));
+        item->setParentItem(view->contentItem());
+        view->show();
+
+        QVERIFY(QTest::qWaitForWindowExposed(view.data()));
+        QCOMPARE(initializeSpy.size(), expected);
+
+        delete view.take();
+        QCOMPARE(invalidateSpy.size(), expected);
+    }
+
+}
+
 QTEST_MAIN(tst_qquickitem)
 
 #include "tst_qquickitem.moc"