Bug 282875 [UI] Allow parts of models to be rendered
We need to change the rendering protocol to allow a 'createGui' to specify the container it should be created under (in SWT-land this would be a Composite). This is necessary to facilitate unit tests and to allow the ad-hoc rendering of chunks of a model within an arbitrary container (i.e. a Dialog or Wizard). In order to do this we'll have to make an API change to the PartFactory's 'createWidget' so that it will get the parent container as a parameter. In order to 'upgrade' an existing PartFactory you would simply replace the code you're currently using to find the correct container with the new parameter's value.
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/StackModelFactory.java
(EObject) childElement,
				ApplicationPackage.Literals.MITEM__TOOLTIP);
		ISWTObservableValue uiTTipObs = SWTObservables.observeTooltipText(cti);
		dbc.bindValue(uiTTipObs, emfTTipObs, null, null);
		
		((EObject) childElement).eAdapters().add(new AdapterImpl() {
			@Override
			public void notifyChanged(Notification msg) {
				MPart<?> sm = (MPart<?>) msg.getNotifier();
				if (ApplicationPackage.Literals.MITEM__ICON_URI.equals(msg
						.getFeature())
						&& !cti.isDisposed()) {
					Image image = getImage(sm);
					cti.setImage(image);
				}
			}
		});
	}
	@Override
	public void childRemoved(MPart<?> parentElement, MPart<?> child) {
		super.childRemoved(parentElement, child);
		CTabItem oldItem = findItemForPart(parentElement, child);
		if (oldItem != null) {
			oldItem.setControl(null); 
			oldItem.dispose();
		}
		
		CTabFolder ctf = (CTabFolder) parentElement.getWidget();
		String policy = parentElement.getPolicy();
		boolean isEditorStack = policy != null