Allow grabbing windows rendered without showing for testing.

To make QQuickWindowPrivate::setRenderWithoutShowing more useful
for autotesting we can allow grabbing such windows. This is safe
if the platform window have been created and the window has a valid
size.

Change-Id: I8b9a2aaeb93935f662b75ef29651730b890441d5
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index b0e3db2c87..b657094e29 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -259,9 +259,8 @@ void QQuickWindowPrivate::polishItems()
  * This parameter enables that this window can be rendered without
  * being shown on screen. This feature is very limited in what it supports.
  *
- * There needs to be another window actually showing that we can make current
- * to get a surface to make current AND for this feature to be useful
- * one needs to hook into beforeRender() and set the render tareget.
+ * For this feature to be useful one needs to hook into beforeRender()
+ * and set the render tareget.
  *
  */
 void QQuickWindowPrivate::setRenderWithoutShowing(bool render)
@@ -1996,6 +1995,13 @@ bool QQuickWindowPrivate::dragOverThreshold(qreal d, Qt::Axis axis, QMouseEvent
     return overThreshold;
 }
 
+bool QQuickWindowPrivate::isRenderable() const
+{
+    if (geometry.width() <= 0 || geometry.height() <= 0)
+        return false;
+    return visible || (renderWithoutShowing && platformWindow);
+}
+
 /*!
     Propagates an event \a e to a QQuickItem \a item on the window.