Small Talks/2012/January/MVVM Extension: Access UI Components Inside ViewModel

MVVM Extension: Access UI Components Inside View Model

Developing an application in MVVM pattern separates View and its backend clearly. Sometime developers want more control of components...

Extend Case Scenario: Popup Detail

In search example mentioned in previous article, users see an item's description in detail only when users click a item (as the below image shows). It's more convenient to show the description when the mouse hover an item. We'll implement this feature through MVVM with autowiring components.

public class SearchAutowireVM{

	//the search condition
	private String filter = "*";
	
	//the search result
	private ListModelList<Item> items;
	
	private Converter totalPriceConverter;
	//the selected item
	private Item selected;
	//UI component
	@Wire("#msgPopup")
	Popup popup;
	@Wire("#msg")
	Label msg;

	@Init
	public void init(BindContext ctx){
		//Returns associated root component of the binder
		Component component = ctx.getBinder().getView();
		Selectors.wireVariables(component, this);
//		Selectors.wireEventListeners(component, this);
	}
        //...
}