how to wait until animation finise

Question

3.00/5 (1 vote)

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i want to execute animation function and wait until it finish than do something else

how can i do that?

C#

// here is the event function
    private void image2_MouseEnter(object sender, MouseEventArgs e)
        {
  MoveTo(image2, 0, 200);
// wait until the previous  function  finse and start new one
  MoveTo(image2, 0, -200);
            
        }

// this is the animation function

 static   void MoveTo(  Image target, double newX, double newY)
        {
            var top = Canvas.GetTop(target);
            var left = Canvas.GetLeft(target);
            TranslateTransform trans = new TranslateTransform();
            target.RenderTransform = trans;
            DoubleAnimation anim1 = new DoubleAnimation(top, newY - top, TimeSpan.FromSeconds(2));
            DoubleAnimation anim2 = new DoubleAnimation(left, newX - left, TimeSpan.FromSeconds(2));
            trans.BeginAnimation(TranslateTransform.XProperty, anim1);
            trans.BeginAnimation(TranslateTransform.YProperty, anim2);
           
        }

Posted 21-Dec-13 12:52pm

Member 10388286

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-12-21T16:43:00

Solution 1

The concept of "waiting" contradicts the concept of even-oriented UI. The UI should remain responsive even when it is showing something in progress. "Do something else" when animation finishes simply means handling appropriate event. This one: http://msdn.microsoft.com/en-us/library/system.windows.media.animation.timeline.completed.aspx[^].

—SA

Posted 21-Dec-13 16:43pm

Sergey Alexandrovich Kryukov

Updated 21-Dec-13 16:44pm

v2

Comments

Ron Beyer 21-Dec-13 22:46pm

+5, waiting shouldn't be a word in UI's, think notifications :)

Sergey Alexandrovich Kryukov 21-Dec-13 22:53pm

Exactly. Thank you, Ron.
—SA

Leung Yat Chun · Answer 2 · 2013-12-22T08:09:00

You may use Storyboard to chain animations:

C#

static IEnumerable<DoubleAnimation> MoveTo(Control target, double origX, double origY, double newX, double newY)
{
         
    TranslateTransform trans = new TranslateTransform();
    target.RenderTransform = trans;
    var a = new DoubleAnimation(origX, newY, TimeSpan.FromSeconds(2));
    Storyboard.SetTargetProperty(a, new PropertyPath("(Canvas.Top)"));
    var b = new DoubleAnimation(origY, newX, TimeSpan.FromSeconds(2));
    Storyboard.SetTargetProperty(b, new PropertyPath("(Canvas.Left)"));

    yield return a;
    yield return b;
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
    Control c = sender as Control;
    var top = Canvas.GetTop(c);
    var left = Canvas.GetLeft(c);          

    Storyboard sb = new Storyboard();
    foreach (var ab in MoveTo(c, left, top, 250, 250))
        sb.Children.Add(ab);

    foreach (var ab in MoveTo(c, 250, 250, 50, 50))
    {
        ab.BeginTime = TimeSpan.FromSeconds(5);
        sb.Children.Add(ab);
    }
                        
    (sender as Control).BeginStoryboard(sb);
}

Regards
Joseph Leung