给DiagramEditPart平添Request

给DiagramEditPart添加Request
实现ScalableFreeformRootEditPart中的performRequest方法即可：

@Overridepublic void performRequest(Request req) { if (req.getType().equals(REQ_OPEN)) { MessageDialog.openConfirm(null, null, "HELLO"); }super.performRequest(req);}