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, 19 insertions, 0 deletions

diff --git a/src/quick/items/qquickrendercontrol.cpp b/src/quick/items/qquickrendercontrol.cpp
index 87a60b5cce..2842d7e933 100644
--- a/src/quick/items/qquickrendercontrol.cpp
+++ b/src/quick/items/qquickrendercontrol.cpp
@@ -239,6 +239,10 @@ void QQuickRenderControl::setWindow(QQuickWindow *window)
     d->window = window;
 }
 
+/*!
+  Returns the offscreen window.
+ */
+
 QQuickWindow *QQuickRenderControl::window() const
 {
     Q_D(const QQuickRenderControl);
@@ -246,6 +250,21 @@ QQuickWindow *QQuickRenderControl::window() const
 }
 
 /*!
+  Create an offscreen QQuickWindow for this render control,
+  unless the render control already has a window().
+
+  Returns the offscreen window if one is created, otherwise returns null.
+  The caller takes ownership of the window, and is responsible for deleting it.
+ */
+QQuickWindow *QQuickRenderControl::createOffscreenWindow()
+{
+    Q_D(QQuickRenderControl);
+    if (!d->window)
+        return new QQuickWindow(this);
+    return 0;
+}
+
+/*!
   \fn QWindow *QQuickRenderControl::renderWindow(QPoint *offset)
 
   Reimplemented in subclasses to return the real window this render control