private void pauseAnimation()
{
if (scrollingStory != null)
{
scrollingStory.Pause();
scrollingStory = null;
}
}
private async Task <bool> scrollTo(double verticalOffset, bool useAnimation = false, double durationInMs = 300)
{
verticalOffset = Math.Max(0, verticalOffset);
verticalOffset = Math.Min((dataSource.Count - 1) * itemHeight, verticalOffset);
pauseAnimation();
if (!useAnimation)
{
Canvas.SetTop(ContentPanel, -verticalOffset);
return(true);
}
else
{
var story = this.scrollingStory = animateTo(verticalOffset, durationInMs);
var ret = await scrollingStory.AsTask();
if (story == this.scrollingStory)
{
this.scrollingStory = null;
}
return(ret);
}
}