How to undock tab with osgViewer from QTabWidget?

Question

I want to undock a QWidget from a QTabWiget (is set as centralWidget). The tab contains some Open Scene Graph content (OpenGL Window). When removing the Tab from the list and putting it into a new Dialog Window (=> undocking from tab) the scene data seems to be corrupt. It works with "standard widgets" but the osg seems to forget the scene.

Surprisingly, undocking works when using a QDockWidget (scene is visible after undocking the window).

Anyone knows how to undock a tab without corrupting the osgViewer?

Code called for to undock from tab and show in new dialog window:

QWidget* gv = // points to an osgViewer in a qt widget 
QDialog* dlg = new QDialog(this); 
dlg->setWindowTitle("hello earth"); 
QHBoxLayout* pMainLay = new QHBoxLayout; 
gv->setMinimumSize(100,100); 
gv->setGeometry(100,100,300,300); 
pMainLay->addWidget(gv); 
dlg->setLayout(pMainLay); 
ui->tabWidget->removeTab(0); // removes the tab at position 0 (docked window)
dlg->show(); // should show the undocked dialog

There is nothing to see in the new dialog. Did I missed something? How to "copy" the osg view properly into a new widget/dialog? Should I use a composite viewer for this kind of task? It seems there is not even the empty osg view visible (no blue canvas)...

Have you tried explicitly reparenting the OSG QWidget to the new QDialog before adding to the layout? — RobbieE, Aug 05 '13 at 06:51
What happens when you remove the resizing code? I'd imagine that that would mess with the OpenGL view. — Phlucious, Aug 05 '13 at 21:14
Just an idea - try to change parent of dlg, before (or/and after) removing it from tab widget. — Dmitry Sazonov, Aug 06 '13 at 09:14
@Phlucious What do you mean by "remove" and for which control? — Beachwalker, Aug 07 '13 at 20:23

score -1 · Answer 1 · answered Aug 05 '13 at 21:26

It could be that something's going screwy when you add the osgViewer to another widget before removing it from the QTabWidget. Changing the order might help.

QWidget* gv = // points to an osgViewer in a qt widget 
ui->tabWidget->removeTab(0); // removes the tab at position 0 (docked window)
QDialog* dlg = new QDialog(this); 
dlg->setWindowTitle("hello earth"); 
QHBoxLayout* pMainLay = new QHBoxLayout; 
pMainLay->addWidget(gv); 
dlg->setLayout(pMainLay); 
dlg->show(); // should show the undocked dialog

How to undock tab with osgViewer from QTabWidget?

1 Answers1