Update Demo to show tap

Author: sitefinitysteve

demo/app/main-page.ts

@@ -33,7 +33,8 @@ export function onToggleTest(args){
 
 export function onTapTest(args){
     console.log("tap event test");
-    model.updateMessage();
+    let box = <CheckBox>args.object;
+    model.updateMessage(box.checked);
 }
 
 export function onDumpModel(args: any){

demo/app/main-view-model.ts

@@ -40,9 +40,9 @@ export class HelloWorldModel extends Observable {
         this.notifyPropertyChange("state", value);
     }
 
-    public updateMessage(){
+    public updateMessage(state){
         this._eventCount++;
-        this.eventLabel = "Triggered " + this._eventCount + " times";
+        this.eventLabel = "Triggered " + this._eventCount + " times, current state:" + state;
     }
 
 }