bool TrySetMicaBackdrop()
{
if (Microsoft.UI.Composition.SystemBackdrops.MicaController.IsSupported())
{
m_wsdqHelper = new WindowsSystemDispatcherQueueHelper();
m_wsdqHelper.EnsureWindowsSystemDispatcherQueueController();
// Hooking up the policy object
m_configurationSource = new Microsoft.UI.Composition.SystemBackdrops.SystemBackdropConfiguration();
this.Activated += Window_Activated;
this.Closed += Window_Closed;
// Initial configuration state.
m_configurationSource.IsInputActive = true;
switch (((FrameworkElement)this.Content).ActualTheme)
{
case ElementTheme.Dark: m_configurationSource.Theme = Microsoft.UI.Composition.SystemBackdrops.SystemBackdropTheme.Dark; break;
case ElementTheme.Light: m_configurationSource.Theme = Microsoft.UI.Composition.SystemBackdrops.SystemBackdropTheme.Light; break;
case ElementTheme.Default: m_configurationSource.Theme = Microsoft.UI.Composition.SystemBackdrops.SystemBackdropTheme.Default; break;
}
m_micaController = new Microsoft.UI.Composition.SystemBackdrops.MicaController();
// Enable the system backdrop.
// Note: Be sure to have "using WinRT;" to support the Window.As<...>() call.
m_micaController.AddSystemBackdropTarget(this.As <Microsoft.UI.Composition.ICompositionSupportsSystemBackdrop>());
m_micaController.SetSystemBackdropConfiguration(m_configurationSource);
return(true); // succeeded
}
return(false); // Mica is not supported on this system
}
private void Window_Closed(object sender, WindowEventArgs args)
{
// Make sure any Mica/Acrylic controller is disposed so it doesn't try to
// use this closed window.
if (m_micaController != null)
{
m_micaController.Dispose();
m_micaController = null;
}
this.Activated -= Window_Activated;
m_configurationSource = null;
}