GraphicalViewer viewer = (GraphicalViewer)getWorkbenchPart().getAdapter(GraphicalViewer.class);
        Control control = viewer.getControl();
        Composite oldParent = control.getParent();
                
        Shell shell = new Shell(SWT.APPLICATION_MODAL);
        shell.setFullScreen(true);
        shell.setMaximized(true);
        
        // Some code here to listen to Esc key to dispose Shell and return...
        
        shell.setLayout(new FillLayout());
        control.setParent(shell);
        shell.open();