public static void StartHideMenuAnimation(UIElement animatableElement, DependencyProperty dependencyProperty, Thickness toValue, Thickness fromValue, double animationDurationSeconds, EventHandler completedEvent)
{
ThicknessAnimation animation = new ThicknessAnimation();
animation.From = (fromValue);
animation.To = (toValue);
animation.Duration = TimeSpan.FromSeconds(animationDurationSeconds);
animation.DecelerationRatio = 0.9;
animation.FillBehavior = FillBehavior.HoldEnd;
animation.Completed += delegate(object sender, EventArgs e)
{
//
// When the animation has completed bake final value of the animation
// into the property.
//
// animatableElement.SetValue(dependencyProperty, animatableElement.GetValue(dependencyProperty));
if (completedEvent != null)
{
completedEvent(sender, e);
}
};
animation.Freeze();
animatableElement.BeginAnimation(dependencyProperty, animation);
}
/// <summary>Gridを表示する</summary>
private void VisibleGrid()
{
// アニメーションの初期設定
var animation = new ThicknessAnimation();
Storyboard.SetTarget(animation, AssociatedObject);
Storyboard.SetTargetProperty(animation, new PropertyPath(Grid.MarginProperty));
// マウスが移動してきた時に0.5秒ほどで表示するようにMarginを調整する
animation.From = AssociatedObject.Margin;
animation.To = new Thickness(0, 0, 0, 0);
animation.Duration = TimeSpan.FromMilliseconds(500);
animation.Freeze();
// アニメーションをストーリーボードに登録し、処理開始
var story = new Storyboard();
story.Children.Add(animation);
story.Begin();
}