实现在GEF中被选中图形上的右键菜单

要实现在GEF中被选中图形上的右键菜单，每个action完成如下三项工作：

1、
action类定义，一般情况的action都会在选中图形后操作，所以，一般都会继承自org.eclipse.gef.ui.actions.SelectionAction

import org.eclipse.gef.ui.actions.SelectionAction;
import org.eclipse.gmf.runtime.diagram.ui.editparts.ShapeEditPart;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import dbdesigner.diagram.edit.parts.TableEditPart;

public class TableProAction extends SelectionAction{
private IWorkbenchPart part;
public TableProAction(IWorkbenchPart part) {
super(part);
setId("tablePro");
setText("属性");
this.part=part;
}
@Override
public void run() {
super.run();
IWorkbenchWindow workbenchWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
TableEditPart tableEditPart = (TableEditPart) getSelectedObjects().get(0);
TableProDialog tp = new TableProDialog(workbenchWindow.getShell(),tableEditPart);
tp.open();
}
@Override
protected boolean calculateEnabled() {
if (getSelectedObjects().size() == 1 && (getSelectedObjects().get(0) instanceof ShapeEditPart)) {
ShapeEditPart part = (ShapeEditPart) getSelectedObjects().get(0);
if(part instanceof TableEditPart)
return true;
}
return false;
}
}
[code]

2、
在DbdesignerDiagramEditor的createActions中将上述action注册到ActionRegistry，并设定和selectionaction的关系,这个类的是GEF生成的代码，只需要修改以下两个地方

prot       protected void configureGraphicalViewer() {
super.configureGraphicalViewer();
IDiagramGraphicalViewer viewer = getDiagramGraphicalViewer();
// configure the context menu provider
ContextMenuProvider cmProvider = new MyDiagramContextMenuProvider(viewer, getActionRegistry());
viewer.setContextMenu(cmProvider);
getSite().registerContextMenu(cmProvider, viewer);
}

/**
* Create the actions
*/
protected void createActions() {
// Create the actions
super.createActions();
ActionRegistry ar = getActionRegistry();
//一组继承自selectionaction的action
IAction[] actions = new IAction[] { new TableProAction(this) // 编辑属性
};
for (IAction a : actions) {
ar.registerAction(a);
getSelectionActions().add(a.getId());
}
}

3、
在新增一个MyDiagramContextMenuProvider类，注册到右键菜单

public class MyDiagramContextMenuProvider extends ContextMenuProvider{

/** The editor's action registry. */
private ActionRegistry actionRegistry;

public MyDiagramContextMenuProvider(EditPartViewer viewer, ActionRegistry registry) {
super(viewer);
if (registry == null) {
throw new IllegalArgumentException();
}
actionRegistry = registry;
}

public void buildContextMenu(IMenuManager menu) {

//添加用户自定义菜单项
menu.add(getAction("tablePro"));
}
// 过滤不需要的上下文菜单
public IContributionItem[] getItems() {
IContributionItem[] ic = super.getItems();
filterSystemPopMenu(ic);
return ic;
}

private void filterSystemPopMenu(IContributionItem[] ic)
{
for (int i=0;i[code]