java - 如何在Eclipse(e4)RCP中实现IWindowCloseHandler？

如何在关闭应用程序之前实现IWindowCloseHandler以显示MessageDialog？

这是我的代码：

编辑

public class LifeCycle {

 @PostContextCreate
 public void postContextCreate()
  {
    // TODO start up code here

     System.out.println("open");

  }

 @ProcessAdditions
  void processAdditions(MApplication app, EModelService modelService)
  {
     WindowCloseHandler closeHandler=new WindowCloseHandler();
    MWindow window = (MWindow)modelService.find("uploadcenter.source.trimmedwindow.0", app);
    window.getContext().set(IWindowCloseHandler.class, closeHandler);
  }
 private static class WindowCloseHandler implements IWindowCloseHandler{

    @Override
    public boolean close(MWindow window) {
        // TODO Auto-generated method stub
        Shell shell = new Shell();

        if (MessageDialog.openConfirm(shell, "Confirmation",
                "Do you want to exit?")) {
            return true;
        }
        return false;
    }
 }

}

伊斯梅尔

最佳答案

IWindowCloseHandler必须在要控制的IEclipseContext的Eclipse上下文（MWindow）中注册。

MWindow window = get the window

window.getContext().set(IWindowCloseHandler.class, handler);

如果要在LifeCycle类中进行设置，则需要做一些工作，因为生命周期方法在应用程序启动时被调用太早，因此无法直接在上下文中设置该值。有必要等待应用启动完成事件：

public class LifeCycle
{
  @ProcessAdditions
  public void processAdditions(IEventBroker eventBroker, MApplication app, EModelService modelService)
  {
     MWindow window =(MWindow)modelService.find("uploadcenter.source.trimmedwindow.0", app);

     eventBroker.subscribe(UIEvents.UILifeCycle.APP_STARTUP_COMPLETE,
                          new AppStartupCompleteEventHandler(window));
  }


  private static class AppStartupCompleteEventHandler implements EventHandler
  {
    private MWindow theWindow;

    AppStartupCompleteEventHandler(MWindow window)
    {
       theWindow = window;
    }


    @Override
    public void handleEvent(final Event event)
    {
      theWindow.getContext().set(IWindowCloseHandler.class, handler);
    }
  }
}