public async Task TransitionForward(DependencyObject previousPage, DependencyObject newPage)
{
if (previousPage == null && newPage == null)
{
throw new InvalidOperationException();
}
if (previousPage == null)
{
await ForwardInAnimation.Animate(newPage);
}
else if (newPage == null)
{
await ForwardOutAnimation.Animate(previousPage);
}
else if (this.Mode == PageTransitionMode.Parallel)
{
var sb = new Storyboard();
var outSb = ForwardOutAnimation.GetAnimation(previousPage);
var inSb = ForwardInAnimation.GetAnimation(newPage);
sb.Children.Add(outSb);
sb.Children.Add(inSb);
await sb.BeginAsync();
sb.Stop();
sb.Children.Clear();
//await Task.WhenAll(
// ForwardOutAnimation.Animate(previousPage),
// ForwardInAnimation.Animate(newPage));
}
else
{
await ForwardOutAnimation.Animate(previousPage);
await ForwardInAnimation.Animate(newPage);
}
}
/// <summary>
/// Runs forward transition.
/// </summary>
/// <param name="previousPage">The previous page.</param>
/// <param name="newPage">The new page.</param>
/// <returns>The task that completes when the transition is complete.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public async Task TransitionForward(DependencyObject previousPage, DependencyObject newPage)
{
if (previousPage == null && newPage == null)
{
throw new ArgumentNullException("newPage");
}
PrepareForwardAnimations(previousPage, newPage);
UpdateTimelineAttributes();
if (previousPage == null)
{
if (ForwardInAnimation != null)
{
await ForwardInAnimation.Animate(newPage);
}
}
else if (newPage == null)
{
if (ForwardOutAnimation != null)
{
await ForwardOutAnimation.Animate(previousPage);
}
}
else if (this.Mode == PageTransitionMode.Parallel)
{
var sb = new Storyboard();
Storyboard outSb = null;
Storyboard inSb = null;
if (this.ForwardOutAnimation != null)
{
outSb = this.ForwardOutAnimation.GetAnimation(previousPage);
sb.Children.Add(outSb);
}
if (this.ForwardInAnimation != null)
{
inSb = this.ForwardInAnimation.GetAnimation(newPage);
sb.Children.Add(inSb);
}
await sb.BeginAsync();
sb.Stop();
sb.Children.Clear();
if (this.ForwardOutAnimation != null)
{
this.ForwardOutAnimation.CleanupAnimation(previousPage, outSb);
}
if (this.ForwardInAnimation != null)
{
this.ForwardInAnimation.CleanupAnimation(newPage, inSb);
}
//await Task.WhenAll(
// ForwardOutAnimation.Animate(previousPage),
// ForwardInAnimation.Animate(newPage));
}
else
{
if (this.ForwardOutAnimation != null)
{
await this.ForwardOutAnimation.Animate(previousPage);
}
if (this.ForwardInAnimation != null)
{
await this.ForwardInAnimation.Animate(newPage);
}
}
CleanupForwardAnimations(previousPage, newPage);
}
