Prevent docking on doubleclick

[yartov]

Hello,
Could somebody tell me how I can prevent docking action on mouse doubleclick on title bar. I create my dockable widget as follow:

QDockWidget* d = new QDockWidget(tr("myDockWidget"), this); 
d->setAllowedAreas(Qt::NoDockWidgetArea);
d->setFeatures ( QDockWidget::DockWidgetFloatable|QDockWidget::DockWidgetMovable|QDockWidget::DockWidgetClosable );
myView = new SplitCombineFiles( d );
d->setWidget(myView );
d->setFloating ( true );

QDockWidget* d = new QDockWidget(tr("myDockWidget"), this); 
d->setAllowedAreas(Qt::NoDockWidgetArea);
d->setFeatures ( QDockWidget::DockWidgetFloatable|QDockWidget::DockWidgetMovable|QDockWidget::DockWidgetClosable );
myView = new SplitCombineFiles( d );
d->setWidget(myView );
d->setFloating ( true );

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i would think that i set all flags possible to prevent docking, but no, it still docks on double click.
Thanks in advance.