<!-- TimelineCompletedExample.xaml 
     This example creates an animated transition between
     two images. When the user clicks the Start Transition button,
     a storyboard shrinks an image until it disappears. 
     The Completed event is used to notify the class when this
     storyboard has completed. The code behind file handles
     this event by swapping the image and making it visible again.
-->
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="SDKSample.TimelineCompletedExample"
  WindowTitle="Timeline Completed Example"
  Loaded="exampleLoaded">
  <Page.Resources>

    <!-- A simple picture of a rectangle. -->
    <DrawingImage x:Key="RectangleDrawingImage">
      <DrawingImage.Drawing>
        <DrawingGroup>
          <GeometryDrawing Brush="White">
            <GeometryDrawing.Geometry>
              <RectangleGeometry Rect="0,0,100,100"  />
            </GeometryDrawing.Geometry>
          </GeometryDrawing>
          <GeometryDrawing Brush="Orange">
            <GeometryDrawing.Geometry>
              <RectangleGeometry Rect="25,25,50,50"  />
            </GeometryDrawing.Geometry>
          </GeometryDrawing>
        </DrawingGroup>
      </DrawingImage.Drawing>
    </DrawingImage>

    <!-- A simple picture of a cirlce. -->
    <DrawingImage x:Key="CircleDrawingImage">
      <DrawingImage.Drawing>
        <DrawingGroup>
          <GeometryDrawing Brush="White">
            <GeometryDrawing.Geometry>
              <RectangleGeometry Rect="0,0,100,100"  />
            </GeometryDrawing.Geometry>
          </GeometryDrawing>
          <GeometryDrawing>
            <GeometryDrawing.Geometry>
              <EllipseGeometry Center="50,50" RadiusX="25" RadiusY="25"  />
            </GeometryDrawing.Geometry>
            <GeometryDrawing.Brush>
              <RadialGradientBrush GradientOrigin="0.75,0.25" Center="0.75,0.25">
                <GradientStop Offset="0.0" Color="White" />
                <GradientStop Offset="1.0" Color="LimeGreen" />
              </RadialGradientBrush>
            </GeometryDrawing.Brush>
          </GeometryDrawing>
        </DrawingGroup>
      </DrawingImage.Drawing>
    </DrawingImage>

    <!-- Define the storyboard that enlarges the image.
         This storyboard is applied using code when
         ZoomOutStoryboard completes. -->
    <Storyboard x:Key="ZoomInStoryboardResource">
      <DoubleAnimation 
        Storyboard.TargetName="AnimatedImageScaleTranform" 
        Storyboard.TargetProperty="ScaleX" 
        Duration="0:0:5" To="1" />
      <DoubleAnimation 
       Storyboard.TargetName="AnimatedImageScaleTranform" 
       Storyboard.TargetProperty="ScaleY" 
       Duration="0:0:5" To="1" />
    </Storyboard>
  </Page.Resources>

  <StackPanel Margin="20" >
    <Border 
      BorderBrush="Gray" BorderThickness="2" 
      HorizontalAlignment="Center" VerticalAlignment="Center">

      <!-- Displays the current ImageSource. -->
      <Image
        Name="AnimatedImage" 
        Width="200" Height="200"
        RenderTransformOrigin="0.5,0.5">
        <Image.RenderTransform>
          <ScaleTransform x:Name="AnimatedImageScaleTranform" 
            ScaleX="1" ScaleY="1" />
        </Image.RenderTransform>
      </Image>
    </Border>


    <!-- This StackPanel contains buttons that control the storyboard. -->
    <StackPanel Orientation="Horizontal" Margin="0,30,0,0">

      <Button Name="BeginButton">Start Transition</Button>
      <Button Name="SkipToFillButton">Skip To Fill</Button>
      <Button Name="StopButton">Stop</Button>

      <StackPanel.Triggers>

        <!-- Begin the storyboard that shrinks the image. After the storyboard
             completes, -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="BeginButton">
          <BeginStoryboard Name="ZoomOutBeginStoryboard">
            <Storyboard x:Name="ZoomOutStoryboard" 
              Completed="zoomOutStoryboardCompleted" FillBehavior="Stop">
              <DoubleAnimation 
                Storyboard.TargetName="AnimatedImageScaleTranform" 
                Storyboard.TargetProperty="ScaleX" 
                Duration="0:0:5" To="0" FillBehavior="Stop" />
              <DoubleAnimation 
               Storyboard.TargetName="AnimatedImageScaleTranform" 
               Storyboard.TargetProperty="ScaleY" 
               Duration="0:0:5" To="0" FillBehavior="Stop" />
            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>

        <!-- Advances ZoomOutStoryboard to its fill period.
             This action triggers the Completed event. -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="SkipToFillButton">
          <SkipStoryboardToFill BeginStoryboardName="ZoomOutBeginStoryboard" />
        </EventTrigger>

        <!-- Stops the storyboard. This action does not
             trigger the completed event. -->
        <EventTrigger RoutedEvent="Button.Click" SourceName="StopButton">
          <StopStoryboard BeginStoryboardName="ZoomOutBeginStoryboard" />
        </EventTrigger>
      </StackPanel.Triggers>
    </StackPanel>
  </StackPanel>
</Page>

' TimelineCompletedExample.xaml.vb
' Handles the ZoomOutStoryboard's Completed event.
' See the TimelienCompletedExample.xaml file
' for the markup that creates the images and storyboards.


Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Navigation


Namespace SDKSample

    Partial Public Class TimelineCompletedExample
        Inherits Page

        Private zoomInStoryboard As Storyboard
        Private currentImageSource As ImageSource
        Private nextImageSource As ImageSource

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub exampleLoaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
            ' Cache the zoom-out storyboard resource.
            zoomInStoryboard = CType(Me.Resources("ZoomInStoryboardResource"), Storyboard)

            ' Cache the ImageSource resources.
            currentImageSource = CType(Me.Resources("RectangleDrawingImage"), ImageSource)
            nextImageSource = CType(Me.Resources("CircleDrawingImage"), ImageSource)

            ' Display the current image source.
            AnimatedImage.Source = currentImageSource
        End Sub

        ' Handles the zoom-out storyboard's completed event. 
        Private Sub zoomOutStoryboardCompleted(ByVal sender As Object, ByVal e As EventArgs)
            AnimatedImage.Source = nextImageSource
            nextImageSource = currentImageSource
            currentImageSource = AnimatedImage.Source
            zoomInStoryboard.Begin(AnimatedImage, HandoffBehavior.SnapshotAndReplace)
        End Sub

    End Class
End Namespace

// TimelineCompletedExample.xaml.cs
// Handles the ZoomOutStoryboard's Completed event.
// See the TimelienCompletedExample.xaml file
// for the markup that creates the images and storyboards.

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;


namespace SDKSample
{

    public partial class TimelineCompletedExample : Page
    {

        private Storyboard zoomInStoryboard;
        private ImageSource currentImageSource;
        private ImageSource nextImageSource;

        public TimelineCompletedExample()
        {
            InitializeComponent();
        }

        private void exampleLoaded(object sender, RoutedEventArgs e)
        {
            // Cache the zoom-out storyboard resource.
            zoomInStoryboard = 
                (Storyboard) this.Resources["ZoomInStoryboardResource"];

            // Cache the ImageSource resources.
            currentImageSource = 
                (ImageSource) this.Resources["RectangleDrawingImage"];
            nextImageSource = 
                (ImageSource) this.Resources["CircleDrawingImage"];

            // Display the current image source.
            AnimatedImage.Source = currentImageSource;
        }

        // Handles the zoom-out storyboard's completed event. 
        private void zoomOutStoryboardCompleted(object sender, EventArgs e)
        {
            AnimatedImage.Source = nextImageSource;
            nextImageSource = currentImageSource;
            currentImageSource = AnimatedImage.Source;
            zoomInStoryboard.Begin(AnimatedImage, HandoffBehavior.SnapshotAndReplace);
        }

    }
}