{ registry = ctx; EventBus bus = registry.getEventBus(); bus.register(this, LoadImage.class); bus.register(this, ImageLoaded.class); bus.register(this, ImageRendered.class); control = new ViewerCtrl(this); }
{ registry = ctx; EventBus bus = registry.getEventBus(); bus.register(this, LoadImage.class); bus.register(this, ImageLoaded.class); bus.register(this, ImageRendered.class); bus.register(this, AddROICanvas.class);  control = new ViewerCtrl(this); }
	public void setContext(Registry ctx) 	{		registry = ctx;		EventBus bus = registry.getEventBus();		bus.register(this, LoadImage.class);		bus.register(this, ImageLoaded.class);		bus.register(this, ImageRendered.class);		control = new ViewerCtrl(this);	}