How to add a double-click listener to my GEF editor?

旧街凉风 提交于 2019-12-01 00:47:33

问题


I'm using GEF. I have a graphical editor with some "boxes" implemented. Now, I want to add a double-click listener to each box (Rectangle). I tried to add a listener to the GraphicalViewer but it did not work.


回答1:


In the GraphicalEditPart of the "box" for which you want to add the listener, you have to override the performRequest(Request req) method. When the framework identifies a double-click on the part's figure, it calls this method with a request that has req.getType()==RequestConstants.REQ_OPEN. You can take over from here. Complete code to test that his works:

@Override
public void performRequest(Request req) {
    if(req.getType() == RequestConstants.REQ_OPEN) {
        System.out.println("requested double-click."); 
    }
}

Hope this does the trick.




回答2:


I am not familiar with GEF myself, however I found this in documentation:

  1. GraphicalEditor abstraction sets the EditDomain - handler for editing events
  2. EditDomain interface with methods for handling events - e.g. double click
  3. Tutorial on how to implement editing of models through GUI in GEF (using EditDomain)



回答3:


viewer.getControl().addListener(SWT.MouseDoubleClick, new Listener() {

        @Override
        public void handleEvent(Event event) {
        //write the double click action
    });


来源:https://stackoverflow.com/questions/7132321/how-to-add-a-double-click-listener-to-my-gef-editor

易学教程内所有资源均来自网络或用户发布的内容,如有违反法律规定的内容欢迎反馈
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!