QQuickWindow/View: set a QObject-parent on the root item

People are often confused why eg. the objects from:

    window->contentItem()->findChildren()

are not included in window->findChildren(). This change connects
the item tree to the window's object tree to make findChild() and
findChildren() produce expected results. The same technique is
already used for QQuickFlickable's contentItem.

[ChangeLog][QtQuick][QQuickWindow] Set the window as the QObject-parent
of the contentItem to ensure consistent behavior for calling
findChildren() on QQuickWindow and QQuickWindow::contentItem.

[ChangeLog][QtQuick][QQuickView] Set the window's contentItem as the
QObject-parent of the rootObject to ensure consistent behavior for
calling findChildren() on QQuickWindow::contentItem and
QQuickView::rootObject.

Change-Id: Idb7834eb5e560088ca849e6ce90e6fa3b3ae3e91
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickview/data/findChild.qml b/tests/auto/quick/qquickview/data/findChild.qml
new file mode 100644
index 0000000000..8cbc46abe2
--- /dev/null
+++ b/tests/auto/quick/qquickview/data/findChild.qml
@@ -0,0 +1,9 @@
+import QtQuick 2.0
+Item {
+    width: 200
+    height: 200
+    objectName: "rootObject"
+    Item {
+        objectName: "rootObjectChild"
+    }
+}