Description Artem Tikhomirov 2005-09-22 11:00:08 EDT

Few classes listed below perform complex initialization of graphical viewer 
with sole purpose to obtain DiagramEditPart:

PrintHelper.createDiagramEditPart(Diagram,PreferencesHint)
CopyToImageUtil.createDiagramEditPart(Diagram,Shell,PreferencesHint)
OffscreenEditPartFactory.createDiagramEditPart(Diagram)

Besides, similar initialization takes place in 
DiagramEditor.configureGraphicalViewer() which we opt for being generated.

It seems reasonable to allow "toolsmith" to have control over that process and 
to keep that functionality in a single place with explicit API.

Using IAdaptable mechanism to get DiagramEditPart (or some new dedicated 
interface that might respect possible uses/extra features) from Diagram would 
be (an Eclipse-style :) solution, e.g. existing code will change to:

DiagramEditPart createDiagramEditPart(Diagram diagram) {
    return (DiagramEditPart) Platform.getAdapterManager().getAdapter(diagram, 
DiagramEditPart.class);
}