Fix incorrect initial size and position of the graphs

Now we default to frameless windows.

Change-Id: I87fbcc11b45568eb64d4694db86aa5b4f4d647d4
Task-id: QTRD-2668
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/examples/customproxy/main.cpp b/examples/customproxy/main.cpp
index 54ea63e9..58b43873 100644
--- a/examples/customproxy/main.cpp
+++ b/examples/customproxy/main.cpp
@@ -26,6 +26,7 @@ int main(int argc, char **argv)
     QGuiApplication app(argc, argv);
 
     Q3DBars *rainfall = new Q3DBars;
+    rainfall->setFlags(rainfall->flags() ^ Qt::FramelessWindowHint);
     rainfall->resize(1280, 800);
     rainfall->setPosition(QPoint(10, 30));
     rainfall->show();
diff --git a/src/datavisualization/engine/q3dwindow.cpp b/src/datavisualization/engine/q3dwindow.cpp
index accac95e..32267a8d 100644
--- a/src/datavisualization/engine/q3dwindow.cpp
+++ b/src/datavisualization/engine/q3dwindow.cpp
@@ -39,6 +39,15 @@ QT_DATAVISUALIZATION_BEGIN_NAMESPACE
  * This class creates a QWindow and provides render loop for visualization types inheriting it.
  * \warning This class is not intended to be used directly by developers.
  *
+ * \note Q3DWindow sets window flag \c{Qt::FramelessWindowHint} on by default. If you want to display
+ * graph windows as standalone windows with regular window frame, clear this flag after constructing
+ * the graph. For example:
+ *
+ * \code
+ *  Q3DBars *graphWindow = new Q3DBars;
+ *  graphWindow->setFlags(graphWindow->flags() ^ Qt::FramelessWindowHint);
+ * \endcode
+ *
  * \sa Q3DBars, Q3DScatter, Q3DSurface, {Qt Data Visualization C++ Classes}
  */
 
@@ -50,6 +59,7 @@ Q3DWindow::Q3DWindow(QWindow *parent)
     : QWindow(parent),
       d_ptr(new Q3DWindowPrivate(this))
 {
+    setFlags(flags() | Qt::FramelessWindowHint);
     setSurfaceType(QWindow::OpenGLSurface);
     QSurfaceFormat surfaceFormat;
     surfaceFormat.setDepthBufferSize(24);