Bug 6238 jar packager: ide freezes on page flip, no progress shown
i selected org.eclipse.jdt.ui org.eclipse.jdt.ui.tests.refactoring (couple thousands of files) and opened the jar packager or flipping the page the whole ide froze. and there was no progress report shown. it took more or less 2 minutes - of total freeze - to flip to the other wizard page. i suggest performing it in another thread and showing progress
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/CheckboxTreeAndListGroup.java
checked && !fWhiteCheckedTreeItems.contains(currentElement));
		}
	}
	/**
	*	An item was checked in one of self's two views.  Determine which
	*	view this occurred in and delegate appropriately
	*
	*	@param event CheckStateChangedEvent
	*/
	public void checkStateChanged(final CheckStateChangedEvent event) {
		
		BusyIndicator.showWhile(fTreeViewer.getControl().getDisplay(), new Runnable() {
			public void run() {
				if (event.getCheckable().equals(fTreeViewer))
					treeItemChecked(event.getElement(), event.getChecked());
				else
					listItemChecked(event.getElement(), event.getChecked(), true);
				notifyCheckStateChangeListeners(event);
			}
		});
	}
	/**
	 *	Lay out and initialize self's visual components.
	 *
	 *	@param parent org.eclipse.swt.widgets.Composite
	 *	@param width int
	 *	@param height int
	 */
	protected void createContents(
		Composite parent,