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/src/org/eclipse/e4/workbench/ui/internal/Workbench.java
command.define(name, null, cat);
		}
		
		for (MWindow window : (EList<? extends MWindow>) workbench.getWindows()) {
			initializeContext(workbenchContext, window);
		}
		workbench.eAdapters().add(new AdapterImpl() {
			@Override
			public void notifyChanged(Notification msg) {
				if (ApplicationPackage.Literals.MAPPLICATION__WINDOWS.equals(msg.getFeature())
						&& msg.getEventType() == Notification.ADD) {
					MPart<?> added = (MPart<?>) msg.getNewValue();
					initializeContext(workbenchContext, added);
				}
			}
		});
	}
	/**
	 * Create the context chain. It both creates the chain for the current model, and adds eAdapters
	 * so it can add new contexts when new model items are added.
	 * 
	 * @param parentContext
	 *            The parent context
	 * @param part
	 *            needs a context created
	 */
	public static void initializeContext(IEclipseContext parentContext, MPart<?> part) {
		final IEclipseContext context;
		if (part.getContext() != null) {
			context = part.getContext();