control.addListener(SWT.Selection, selectionListener);
attachListeners(control, false);
viewForm = new ViewForm(control, SWT.FLAT);
attachListeners(viewForm, false);
systemToolbar = new StandardSystemToolbar(viewForm, true, false, true, true, true);
systemToolbar.addListener(systemToolbarListener);
viewForm.setTopRight(systemToolbar.getControl());
topCenter = new ProxyControl(viewForm);
topCenterCache = new SizeCache();