More Questions about MVP, Custom Events and the Eventbus

I have an application where a set of custom composite widgets in the view have to know when each is clicked so the clicked widget can offer the user a red border to indicate the selection and also so that any previously selected widget can go back to being the normal color. These widgets can be added to the view dynamically by the user. This suggests to me that I should use an eventbus and custom events to represent this behavior. Every time I start trying to construct this however, I find myself wanting to reference the eventbus in the view (to fire a custom event with some identifier for the widget on click), but doing this feels like it could lead to problems.

I guess my questions are the following:

1. Can/should the view hold a reference to the eventbus, or can the application controller offer a static getter for the eventbus that the view can use to fire events on it?

2. Is there another way of handling this behavior that doesn't use the eventbus, such as a scheme for adding all the previously added widgets as handlers for the new widgets? This question makes me think that the eventbus really is the way to handle this.

3. One of my ideas included holding a reference to the eventbus in the custom event class as a static field, This way, a register static method could set the event bus and a fire static method could fire the event on the eventbus without any other classes needing to know about it. This seems like it's complicating the event too much, though.

Any thoughts?

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