/// <summary>
/// Updates the overlay UI.
/// </summary>
private void UpdateOverlayUI()
{
var chrome = WindowChrome.GetChrome(this);
// When the overlay mode changes, ensure we clear the overlay content to ensure a switch between the Backstage modes executes the template selector again
var viewModel = this.ViewModel;
if (currentOverlayMode != viewModel.OverlayMode)
{
WindowChrome.SetOverlayContent(this, null);
currentOverlayMode = viewModel.OverlayMode;
}
switch (viewModel.OverlayMode)
{
case ApplicationOverlayMode.ExternalSample:
WindowChrome.SetOverlayAnimationKinds(this, OverlayAnimationKinds.Fade);
WindowChrome.SetOverlayContent(this, "Loading external sample...");
this.SetBinding(WindowChrome.IsOverlayVisibleProperty, new Binding()
{
Source = ViewModel, Path = new PropertyPath(nameof(ApplicationViewModel.IsLoadingExternalSample)), Mode = BindingMode.TwoWay
});
BindingOperations.ClearBinding(this, WindowChrome.UseAlternateTitleBarStyleProperty);
break;
default: // Backstage (all kinds)
WindowChrome.SetOverlayAnimationKinds(this, OverlayAnimationKinds.FadeSlide);
WindowChrome.SetOverlayContent(this, viewModel);
this.SetBinding(WindowChrome.IsOverlayVisibleProperty, new Binding()
{
Source = ViewModel, Path = new PropertyPath(nameof(ApplicationViewModel.IsBackstageOpen)), Mode = BindingMode.TwoWay
});
this.SetBinding(WindowChrome.UseAlternateTitleBarStyleProperty, new Binding()
{
Source = ViewModel, Path = new PropertyPath(nameof(ApplicationViewModel.IsBackstageOpen)), Mode = BindingMode.TwoWay
});
break;
}
}
