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.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/TrimBarRenderer.java
}
		boolean done = toContribute.size() == 0;
		while (!done) {
			ArrayList<MTrimContribution> curList = new ArrayList<MTrimContribution>(
					toContribute);
			int retryCount = toContribute.size();
			toContribute.clear();
			for (final MTrimContribution contribution : curList) {
				final ArrayList<MTrimElement> toRemove = new ArrayList<MTrimElement>();
				if (!ContributionsAnalyzer.processAddition(trimModel,
						contribution, toRemove, existingToolbarIds)) {
					toContribute.add(contribution);
				} else {
					if (contribution.getVisibleWhen() != null) {
						ctx.runAndTrack(new RunAndTrack() {
							@Override
							public boolean changed(IEclipseContext context) {
								if (!trimModel.isToBeRendered()
										|| !trimModel.isVisible()
										|| trimModel.getWidget() == null) {
									return false;
								}
								boolean rc = ContributionsAnalyzer.isVisible(
										contribution, eContext);
								for (MTrimElement child : toRemove) {
									child.setToBeRendered(rc);
								}
								return true;
							}
						});