package views
{
	import core.IModel;
	
	import events.ViewInitializedEvent;
	
	import mx.binding.utils.ChangeWatcher;
	import mx.core.UIComponent;
	import mx.events.FlexEvent;
	
	public class SimpleViewUtil
	{
		public static function addEventListeners(oldModel:IModel, model:IModel, members:Array, changeHandler:Function) : void {
			if(oldModel) {
				for each(var member:String in members) {
					var events:Object = ChangeWatcher.getEvents(oldModel, member);
					for(var eventName:String in events) {					
						oldModel.removeEventListener(eventName, changeHandler);
					}
				}
			}
			for each(member in members) {
				events = ChangeWatcher.getEvents(model, member);
				for(eventName in events) {
					model.addEventListener(eventName, changeHandler);
				}
			}
		}	
		
		public static function addValidationListeners(component:UIComponent) : void {
			component.dispatchEvent(new ViewInitializedEvent());
			
			component.addEventListener(FlexEvent.INVALID, function() : void {
				//component.setStyle("oldBackgroundColor", component.getStyle("backgroundColor"));
				//component.setStyle("backgroundColor", component.getStyle("errorColor"));
				component.parent.dispatchEvent(new FlexEvent(FlexEvent.INVALID, true));
			});
			
			component.addEventListener(FlexEvent.VALID, function() : void {				
				//component.setStyle("backgroundColor", component.getStyle("oldBackgroundColor"));
				component.parent.dispatchEvent(new FlexEvent(FlexEvent.VALID, true));
			});
		}
	}
}