Java SWT: widgetSelected vs widgetDefaultSelected

问题:

For example I want to execute something when user clicks on a button. Which do I use? The documentation didn't appear to make it very clear

UPDATE

A quick test shows that Widget Selected is triggered but not Default Selected.

In TasksView.main()

TasksView view = new TasksView(shell, SWT.None); TasksController controller = new TasksController(view); 

In TasksController

public class TasksController extends ControllerAbstract {     protected TasksView view;      public TasksController(TasksView view) {         this.view = view;         view.addTaskListener(new AddTaskListener());     }      protected class AddTaskListener implements SelectionListener {          @Override         public void widgetDefaultSelected(SelectionEvent arg0) {             System.out.println("Default Selected");          }          @Override         public void widgetSelected(SelectionEvent arg0) {             System.out.println("Widget Selected");          }      } } 

btw, Did I do MVC correctly?

回答1:

Use widgetSelected. In fact, all the better is to simply extend SelectionAdapter and only override the widgetSelected method and completely ignore widgetDefaultSelected.

回答2:

SelectionListener.widgetDefaultSelected(e) has a toolkit dependent behavior. I usually just invoke SelectionListener.widgetSelected(...). (Note that this is not the default in SelectionAdapter.widgetDefaultSelected(e) - you will have to do this yourself.

文章来源: Java SWT: widgetSelected vs widgetDefaultSelected