/// <summary>
/// Check end opacity and redraw control with new parameters.
/// </summary>
/// <param name="obj"></param>
/// <param name="args"></param>
private static void EndOpacityChangedCallback(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
LoadingIndicator ctl = (LoadingIndicator)obj;
ctl.EndOpacity = LoadingIndicator.CorrectOpacityValue((double)args.NewValue);
ctl.CreateAnimation();
}
/// <summary>
/// Stop animation when control becomes collapsed and create it anew - when visible.
/// </summary>
/// <param name="obj"></param>
/// <param name="args"></param>
private static void ControlVisibilityCallback(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
LoadingIndicator ctl = (LoadingIndicator)obj;
Visibility visibility = (Visibility)args.NewValue;
if (ctl.GridRoot != null)
{
if (visibility == Visibility.Collapsed)
{
ctl.GridRoot.Children.Clear();
}
else
{
ctl.CreateAnimation();
}
}
}
/// <summary>
/// Redraw control with new parameters.
/// </summary>
/// <param name="obj"></param>
/// <param name="args"></param>
private static void ValueChangedCallback(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
LoadingIndicator ctl = (LoadingIndicator)obj;
ctl.CreateAnimation();
}