ZK Developer's Reference/MVVM/Advanced/Wire Event Listeners

To wire event listeners in a ViewModel like ZK Developer's Reference/MVC/Controller/Wire Event Listeners, we have to call Selectors.wireEventListeners() in the initial method. We then can use @Listen to declare a method as an event listener. We do not recommend this usage because it loses ViewModel an important advantage i.e. loose coupling with View. Please evaluate the trade-offs before using it.

Wire event listener in a ViewModel

public class SearchAutowireVM{

	@Init
	public void init(@ContextParam(ContextType.VIEW) Component view){
		Selectors.wireEventListeners(view, this);
	}

	@Listen("onClick=#mybutton")
	public void submit(MouseEvent event){
		//handle events
	}
}

• Selectors.wireEventListeners() 's first parameters is Root View Component which can be retrieved by @ContextParam.

Usage Changed in 6.0.2

The timing of BindComposer calling @Init method becomes earlier to handle more common situation. Hence, to wire components in a ViewModel, you should use @AfterCompose as follows:

Wire event listener in a ViewModel

public class SearchAutowireVM{

	@AfterCompose
	public void afterCompose(@ContextParam(ContextType.VIEW) Component view){
		Selectors.wireEventListeners(view, this);
	}

	@Listen("onClick=#mybutton")
	public void submit(MouseEvent event){
		//handle events
	}
}

• Selectors.wireEventListeners() 's first parameters is Root View Component which can be retrieved by @ContextParam.

Version History

Version	Date	Content
6.0.0	May 2012	Supplement
6.0.2	July 2012	The @AfterCompose was introduced.