Bug 320243 Closing last view of a minimized stack makes the stack in an unstable state
I20100718-2237 1. Minimize the 'Package Explorer'. 2. Show it by clicking its icon in the trim. 3. Close it. 4. Notice that it still shows up in the trim. 5. Click on the icon. 6. An SWTException occurs. org.eclipse.swt.SWTException: Widget is disposed at org.eclipse.swt.SWT.error(SWT.java:4083) at org.eclipse.swt.SWT.error(SWT.java:3998) at org.eclipse.swt.SWT.error(SWT.java:3969) at org.eclipse.swt.widgets.Widget.error(Widget.java:468) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340) at org.eclipse.swt.widgets.Widget.getData(Widget.java:554) at org.eclipse.e4.ui.workbench.addons.minmax.TrimStack$9.widgetSelected(TrimStack.java:308)
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ModelServiceImpl.java
element.getParent().getChildren().remove(element);
		MWindowElement uiRoot = wrapElementForWindow(element);
		newWindow.getChildren().add(uiRoot);
		if (curParent instanceof MPerspective) {
			MPerspective persp = (MPerspective) curParent;
			persp.getWindows().add(newWindow);
			MWindow window = getTopLevelWindowFor(persp);
			IPresentationEngine renderingEngine = persp.getContext().get(IPresentationEngine.class);
			Object foo = renderingEngine.createGui(newWindow, window.getWidget(),
					persp.getContext());
			if (foo != null)
				System.out.println(foo.toString());
		} else if (curParent instanceof MWindow) {
			((MWindow) curParent).getWindows().add(newWindow);
		}
	}
	/**
	 * @param element
	 * @return
	 */
	private MWindowElement wrapElementForWindow(MPartSashContainerElement element) {
		if (element instanceof MWindowElement)
			return (MWindowElement) element;
		if (element instanceof MPlaceholder) {
			MUIElement ref = ((MPlaceholder) element).getRef();
			if (ref instanceof MPart) {
				MPartStack newPS = MBasicFactory.INSTANCE.createPartStack();
				newPS.getChildren().add((MPlaceholder) element);
				return newPS;
			}