demo(angular): demo app fixes

Author: farfromrefug

demo-snippets/ng/basic/basic.component.html

@@ -3,7 +3,8 @@
     <Label text="Basic Drawer"></Label>
 </ActionBar>
 
-<BottomSheet [(stepIndex)]="stepIndex" [steps]="[56, 156, 456]" backdropColor="#88000000">
+<BottomSheet [stepIndex]="stepIndex"
+(stepIndexChange)="onIndexChanged($event)" [steps]="[56, 156, 456]" backdropColor="#88000000">
     <StackLayout backgroundColor="red">
         <Label text="This is the main content"></Label>
     </StackLayout>

demo-snippets/ng/basic/basic.component.ts

@@ -36,6 +36,10 @@ export class BasicComponent {
         this.stepIndex = index;
     }
 
+    onIndexChanged(event) {
+        this.setIndex(event.value);
+    }
+
     goBack(): void {
         this.router.back();
     }