/// <summary>
/// Update the caption content
/// </summary>
private async void UpdateCaptionContent()
{
var updateRequired = await _controller.CaptionUpdateRequiredAsync(MediaPlayer.Position);
if (updateRequired)
{
var captionData = _controller.GetXamlCaptions(
(ushort)MediaPlayer.ActualHeight);
if (captionData.RequiresUpdate)
{
_captionsContainer.Children.Clear();
// If an OnCaptionAdded event handler has been added, call
// it to modify the caption Xaml before adding it to the
// scene.
if (this.OnCaptionAdded != null)
{
this.OnCaptionAdded(this, new UIElementEventArgs(captionData.CaptionsRoot));
}
_captionsContainer.Children.Add(captionData.CaptionsRoot);
}
}
}
