Make QQuickRenderControl usable (still private)

QQuickRenderControl needs a QQuickWindow in order to function. This
required the use of a private QQuickWindow constructor, meaning that
only friend classes of QQuickWindow could use QQuickRenderControl.

This change adds a factory function, QQuickRenderControl::createOffscreenWindow().

Task-number: QTBUG-38996
Change-Id: I92f6f1f60045934f3dd33c300352247852463c73
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/quickwidgets/qquickwidget.cpp b/src/quickwidgets/qquickwidget.cpp
index ec5d0bf8df..e63b0cc3c7 100644
--- a/src/quickwidgets/qquickwidget.cpp
+++ b/src/quickwidgets/qquickwidget.cpp
@@ -86,7 +86,7 @@ void QQuickWidgetPrivate::init(QQmlEngine* e)
     Q_Q(QQuickWidget);
 
     renderControl = new QQuickWidgetRenderControl(q);
-    offscreenWindow = new QQuickWindow(renderControl);
+    offscreenWindow = renderControl->createOffscreenWindow();
     offscreenWindow->setTitle(QString::fromLatin1("Offscreen"));
     // Do not call create() on offscreenWindow.
     createOffscreenSurface();