private static async void OnHighlightStylePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// Unpack the parameters and lock the UI
Hilite_meHighlightStylePreviewControl @this = d.To <Hilite_meHighlightStylePreviewControl>();
await @this.AnimationSemaphore.WaitAsync();
SyntaxHighlightStyle style = e.NewValue.To <SyntaxHighlightStyle>();
// Check if there's a background transition
HighlightTransitionType transition = HighlightTransitionType.None;
if (e.OldValue != DependencyProperty.UnsetValue && e.OldValue != null)
{
SyntaxHighlightStyle old = e.OldValue.To <SyntaxHighlightStyle>();
if (LightStyles.Contains(style) && !LightStyles.Contains(old))
{
// Dark to light transition needed
transition = HighlightTransitionType.DarkToLight;
}
else if (!LightStyles.Contains(style) && LightStyles.Contains(old))
{
// Light to dark transition
transition = HighlightTransitionType.LightToDark;
}
}
else
{
bool light = LightStyles.Contains(style);
@this.FadeCanvas.Background = new SolidColorBrush(light ? Colors.White : Colors.Black);
@this.WebControl.DefaultBackgroundColor = light ? Colors.White : Colors.Black;
}
// Function to load the sample HTML
Task <String> htmlTask = @this.LoadHTMLPreviewAsync();
// Await the out animations and the HTML loading
List <Task> outTasks = new List <Task>
{
@this.BlurAsync(20, TimeSpan.FromMilliseconds(AnimationDuration)),
htmlTask
};
if (transition != HighlightTransitionType.None)
{
@this.FadeCanvas.Background = new SolidColorBrush(transition == HighlightTransitionType.LightToDark ? Colors.Black : Colors.White);
outTasks.Add(
@this.WebControl.StartCompositionFadeScaleAnimationAsync(1, 0.4f, 1, 1.05f, AnimationDuration, null, null, EasingFunctionNames.Linear));
}
else
{
outTasks.Add(
@this.WebControl.StartCompositionScaleAnimationAsync(1, 1.05f, AnimationDuration, null, EasingFunctionNames.Linear));
}
await Task.WhenAll(outTasks);
// Show the HTML, animate back in and then release the semaphore
@this.WebControl.SetVisualOpacity(1);
@this.WebControl.NavigateToString(htmlTask.Result);
await Task.WhenAll(
@this.WebControl.StartCompositionScaleAnimationAsync(1.05f, 1, AnimationDuration, null, EasingFunctionNames.Linear),
@this.BlurAsync(0, TimeSpan.FromMilliseconds(AnimationDuration)));
if (@this.LoadingRing.Visibility == Visibility.Visible)
{
@this.LoadingRing.Visibility = Visibility.Collapsed;
}
@this.AnimationSemaphore.Release();
}