using Microsoft.Graphics.Canvas;
using System;
using Windows.UI;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Navigation;

namespace Win2DTest
{
    public sealed partial class MainPage : Page
    {
        private CanvasBitmap bitmap;

        public MainPage()
        {
            this.InitializeComponent();

            this.NavigationCacheMode = NavigationCacheMode.Required;
        }

        protected override void OnTapped(TappedRoutedEventArgs e)
        {
            if (this.canvas != null)
            {
                this.canvas.Invalidate();
            }

            base.OnTapped(e);
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            base.OnNavigatedFrom(e);
        }

        void CanvasControl_Draw(CanvasControl sender, CanvasDrawEventArgs args)
        {
            args.DrawingSession.Clear(Colors.CornflowerBlue);

            if (this.bitmap != null)
            {
                args.DrawingSession.DrawImage(bitmap);
            }
        }

        private async void CanvasControl_CreateResources(CanvasControl sender, object args)
        {
            this.bitmap = await CanvasBitmap.LoadAsync(sender, "Assets/SplashScreen.scale-240.png");
        }
    }
}