現在、4.0 にはバグはありません。以下のコードは正常に動作します。
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="WpfAnimation.Win1805787"
xmlns:Local="clr-namespace:WpfAnimation"
x:Name="MyWindow"
Title="Win1805787"
Width="640" Height="480">
<Grid x:Name="LayoutRoot">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBox HorizontalAlignment="Right" VerticalAlignment="Top" Width="75" Text="{Binding CurrentFrame, ElementName=MyWindow}" Height="20" Margin="5,0,5,5"/>
<Button x:Name="Play1" Content="Play" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75" Click="Play_Click" Margin="5,0,5,5"/>
<Button x:Name="Pause1" Content="Pause" HorizontalAlignment="Right" VerticalAlignment="Top" Width="75" Click="Pause_Click" Margin="5,0,5,5"/>
<Button x:Name="Resume1" Content="Resume" HorizontalAlignment="Right" VerticalAlignment="Top" Width="75" Click="Resume_Click" Margin="5,0,5,5"/>
</StackPanel>
</Grid>
</Window>
/////////////////////////
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
namespace WpfAnimation
{
/// <summary>
/// Interaction logic for Win1805787.xaml
/// </summary>
public partial class Win1805787 : Window
{
public Win1805787()
{
this.InitializeComponent();
_createStoryBoard();
// Insert code required on object creation below this point.
}
public int CurrentFrame
{
get { return (int)GetValue(CurrentFrameProperty); }
set { SetValue(CurrentFrameProperty, value); }
}
// Using a DependencyProperty as the backing store for CurrentFrame. This enables animation, styling, binding, etc...
public static readonly DependencyProperty CurrentFrameProperty =
DependencyProperty.Register("CurrentFrame", typeof(int), typeof(Win1805787),
new PropertyMetadata(0, new PropertyChangedCallback(OnValueChanged)));
private static void OnValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
}
Storyboard _filmstripStoryboard;
void _createStoryBoard()
{
Int32Animation element = new Int32Animation();
element.From = 0;
element.To = 100;
element.Duration = Duration.Plus(new Duration(new TimeSpan(1000000000)));
Storyboard.SetTargetProperty(element, new PropertyPath(CurrentFrameProperty));
_filmstripStoryboard = new Storyboard { SpeedRatio = 0.5 };
_filmstripStoryboard.Children.Add(element);
}
private void Play_Click(object sender, System.Windows.RoutedEventArgs e)
{
_filmstripStoryboard.Begin(this, true);
}
private void Pause_Click(object sender, System.Windows.RoutedEventArgs e)
{
_filmstripStoryboard.Pause(this);
}
private void Resume_Click(object sender, System.Windows.RoutedEventArgs e)
{
_filmstripStoryboard.Resume(this);
}
}
}