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eclipsee4

How to get notification about window opened or created in e4

In AddOn we can get notification about application start completed by following method: 

    @Optional
    @Inject
    public void appStartupComplete(@UIEventTopic(UIEvents.UILifeCycle.APP_STARTUP_COMPLETE)
                           org.osgi.service.event.Event event)

Can we get notification about aplication window was opened? I try to listen UIEvents.TrimmedWindow.TOPIC_ALL and UIEvents.Window.TOPIC_ALL but nothing happens...

Solution

  • When an addon is created the main application window has already been created so you can just find that using EModelService.

    The UIEvents.UIElement.TOPIC_TOBERENDERED event will tell you about all UI objects when they are rendered by calling MUIElement.setToBeRendered (made visible or hidden):

    @Inject
@Optional
void event(@UIEventTopic(UIEvents.UIElement.TOPIC_TOBERENDERED) Event event)
{
  if (event == null)
    return;

  // The UI element
  Object element = event.getProperty(UIEvents.EventTags.ELEMENT);

  // Rendered or hidden value
  Boolean toBeRendered = (Boolean)event.getProperty(UIEvents.EventTags.NEW_VALUE);

    However this event isn't generated for objects generated dynamically which don't call setToBeRendered

    The UIEvents.Context.TOPIC_CONTEXT event is fired for creation of all objects in which a context is set - biut it may be fired at other times as well.