DisplayGroupGraphicsScene::DisplayGroupGraphicsScene()
{
    setSceneRect(0., 0., 1., 1.);

    // for the tiled display
    addRect(0., 0., 1., 1.);

    // add rectangles for the tiles
    refreshTileRects();
}
DisplayGroupGraphicsScene::DisplayGroupGraphicsScene()
{
    setSceneRect(0., 0., 1., 1.);

    // for the tiled display
    addRect(0., 0., 1., 1.);

    // add rectangles for the tiles
    refreshTileRects();

    // get marker for this scene
    marker_ = g_displayGroupManager->getNewMarker();
}
DisplayGroupGraphicsScene::DisplayGroupGraphicsScene(DisplayGroupManagerPtr displayGroup)
    : displayGroup_(displayGroup)
{
    setSceneRect(0., 0., 1., 1.);

    // for the tiled display
    addRect(0., 0., 1., 1.);

    // add rectangles for the tiles
    refreshTileRects();

    // get marker for this scene
    markers_.push_back( displayGroup_->getNewMarker( ));
}