wpf - WPFのストーリーボードを開始後、事前に定義された時間に一時停止/停止するにはどうすればよいですか？

Question

WPFのストーリーボードを、開始後の事前定義された時間に停止/一時停止するにはどうすればよいですか？たとえば、開始から20秒後？

Answer 1

私があなたの質問を正しく理解していれば、私のプロジェクトから、定義された秒数で UI 要素をある要素から別の要素にスムーズに変更します。

void ScreenSelector(FrameworkElement CurrentElement, FrameworkElement ToNextElement, bool Side)
  {
   if (_Storyboard != null) _Storyboard.Stop(this);

   Thickness _TicknessLeft = new Thickness(Width, 0, -Width, 0);
   Thickness _TicknessRight = new Thickness(-Width, 0, Width, 0);
   Thickness _TicknessClient = new Thickness(0, 0, 0, 0);

   TimeSpan _TimeSpanStarting = TimeSpan.FromSeconds(0);
   TimeSpan _TimeSpanStopping = TimeSpan.FromSeconds(0.5);

   KeyTime _KeyTimeStarting = KeyTime.FromTimeSpan(_TimeSpanStarting);
   KeyTime _KeyTimeStopping = KeyTime.FromTimeSpan(_TimeSpanStopping);

   ToNextElement.Margin = Side ? _TicknessRight : _TicknessLeft;
   ToNextElement.Visibility = Visibility.Visible;

   Storyboard _StoryboardTemp = new Storyboard();

   ThicknessAnimationUsingKeyFrames _CurrentThicknessAnimationUsingKeyFrames = new ThicknessAnimationUsingKeyFrames();

   _CurrentThicknessAnimationUsingKeyFrames.BeginTime = _TimeSpanStarting;
   Storyboard.SetTargetName(_CurrentThicknessAnimationUsingKeyFrames, CurrentElement.Name);
   Storyboard.SetTargetProperty(_CurrentThicknessAnimationUsingKeyFrames, new PropertyPath("(FrameworkElement.Margin)"));
   _CurrentThicknessAnimationUsingKeyFrames.KeyFrames.Add(new SplineThicknessKeyFrame(_TicknessClient, _KeyTimeStarting));
   _CurrentThicknessAnimationUsingKeyFrames.KeyFrames.Add(new SplineThicknessKeyFrame(Side ? _TicknessLeft : _TicknessRight, _KeyTimeStopping));

   _StoryboardTemp.Children.Add(_CurrentThicknessAnimationUsingKeyFrames);

   ThicknessAnimationUsingKeyFrames _NextThicknessAnimationUsingKeyFrames = new ThicknessAnimationUsingKeyFrames();

   _NextThicknessAnimationUsingKeyFrames.BeginTime = _TimeSpanStarting;
   Storyboard.SetTargetName(_NextThicknessAnimationUsingKeyFrames, ToNextElement.Name);
   Storyboard.SetTargetProperty(_NextThicknessAnimationUsingKeyFrames, new PropertyPath("(FrameworkElement.Margin)"));
   _NextThicknessAnimationUsingKeyFrames.KeyFrames.Add(new SplineThicknessKeyFrame(Side ? _TicknessRight : _TicknessLeft, _KeyTimeStarting));
   _NextThicknessAnimationUsingKeyFrames.KeyFrames.Add(new SplineThicknessKeyFrame(_TicknessClient, _KeyTimeStopping));

   _StoryboardTemp.Children.Add(_NextThicknessAnimationUsingKeyFrames);

   _StoryboardTemp.Completed += (EventHandler)delegate(object sender, EventArgs e)
   {
    CurrentElement.Visibility = Visibility.Hidden;
    _Storyboard = null;
   };

   _Storyboard = _StoryboardTemp;
   BeginStoryboard(_StoryboardTemp);
  }