[Silverlight] Storyboard in custom control

Question

Hi all,

I have an usercontrol in silverlight that I'm trying to convert to custom control. The usercontrol is working. The customcontrol is working BUT has its storyboard not working.

the control is :

public class MyControl : Control
{
    public MyControl()
    {
        DefaultStyleKey = typeof(MyControl);
    }

    public static readonly DependencyProperty IsStartingProperty = DependencyProperty.Register("IsStarting", typeof(bool), typeof(MyControl), new PropertyMetadata(new PropertyChangedCallback(OnIsStartingChanged)));

    private static void OnIsStartingChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
    {
        MyControl control = obj as MyControl;
        if (control != null && control._layoutRoot != null && control._storyboard != null)
        {
            if ((bool)e.NewValue)
            {
                control._layoutRoot.Visibility = Visibility.Visible;
                control._storyboard.Begin();
            }
            else
            {
                control._layoutRoot.Visibility = Visibility.Collapsed;
                control._storyboard.Stop();
            }
        }
    }

    private Canvas _layoutRoot;
    private Storyboard _storyboard;

    public override void OnApplyTemplate()
    {
        _layoutRoot = GetTemplateChild("LayoutRoot") as Canvas;
        _storyboard = GetTemplateChild("IndicatorStoryboard") as Storyboard;
        base.OnApplyTemplate();
    }

    public bool IsStarting
    {
        get { return (bool)GetValue(IsStartingProperty); }
        set { SetValue(IsStartingProperty, value); }
    }
}

On debug, no error on control._storyboard.Begin();, but I can't see the animation ...

Does someone has an idea ? How to work with storyboard ?

Thanks in advance for any help

EDIT : Full source sample is available : http://vpclip.virtua-peanuts.net/WindowsPhoneApplication1.zip

Answer 1

This is off the top of my head, but what happens if you move the "base.OnApplyTemplate(); " as the first line in the OnApplyTemplate() function?

   public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();
        _layoutRoot = GetTemplateChild("LayoutRoot") as Canvas;
        _storyboard = GetTemplateChild("IndicatorStoryboard") as Storyboard;
    }

Does that help?