public async Task ShowOverlayAsync(IMediaViewModel mediaModel, bool allowClosing, CancellationToken ct)
{
if (mediaModel == null)
{
throw new ArgumentNullException(nameof(mediaModel));
}
var WINDOW_HANDLE = new WindowInteropHelper(this).Handle;
var PRIMARY_SCREEN = System.Windows.Forms.Screen.PrimaryScreen;
IntPtr PREVIOUS_WINDOW_HANDLE = IntPtr.Zero;
try
{
var CANCELATION_TOKEN_SOURCE = CreateOverlayLinkedTokenSource(ct);
var CANCELATION_TOKEN = CANCELATION_TOKEN_SOURCE.Token;
var CONTENT = await Dispatcher.InvokeAsync(() =>
{
var CC = new ContentControl()
{
Content = mediaModel,
ContentTemplate = FindResource("VIDEO_PLAYER_TEMPLATE") as DataTemplate,
};
return(CC);
});
PREVIOUS_WINDOW_HANDLE = GetForegroundWindow();
if (PREVIOUS_WINDOW_HANDLE == WINDOW_HANDLE)
{
PREVIOUS_WINDOW_HANDLE = IntPtr.Zero;
}
SWP SHOW_FLAGS = SWP.SWP_NOREDRAW | SWP.SWP_ASYNCWINDOWPOS;
HWND SHOW_HWND = PREVIOUS_WINDOW_HANDLE != IntPtr.Zero ? (HWND)PREVIOUS_WINDOW_HANDLE : HWND.HWND_NOTOPMOST;
SetWindowPos(WINDOW_HANDLE,
SHOW_HWND,
0,
0,
PRIMARY_SCREEN.Bounds.Width,
PRIMARY_SCREEN.Bounds.Height,
SHOW_FLAGS);
if (await OVERLAY_LOCK.WaitAsync(TimeSpan.Zero) == true)
{
try
{
await ShowOverlayWithLockAsync(CONTENT, allowClosing, Timeout.InfiniteTimeSpan, CANCELATION_TOKEN);
}
catch
{
throw;
}
finally
{
OVERLAY_LOCK.Release();
}
}
else
{
var WAIT_HANDLE = new SemaphoreSlim(0, 1);
var CONTENT_LOCK = new ContentLock()
{
Content = CONTENT, WaitHandle = WAIT_HANDLE
};
OVERLAY_CONTENT_STACK.Push(CONTENT_LOCK);
ct.Register(async() =>
{
var NEW_STACK = OVERLAY_CONTENT_STACK.Where(o => o != CONTENT_LOCK);
OVERLAY_CONTENT_STACK = new ConcurrentStack <ContentLock>(NEW_STACK);
if (OVERLAY_CONTENT_STACK.TryPeek(out var CURRENT_LOCK))
{
await Dispatcher.InvokeAsync(() => _OVERLAY_CONTENT_HOST.Content = CURRENT_LOCK.Content);
}
});
await Dispatcher.InvokeAsync(() => _OVERLAY_CONTENT_HOST.Content = CONTENT);
await WAIT_HANDLE.WaitAsync(Timeout.InfiniteTimeSpan, CANCELATION_TOKEN);
}
}
catch
{
throw;
}
finally
{
var INSERT_AFTER = PREVIOUS_WINDOW_HANDLE != IntPtr.Zero ? (HWND)PREVIOUS_WINDOW_HANDLE : HWND.HWND_NOTOPMOST;
SetWindowPos(WINDOW_HANDLE,
INSERT_AFTER,
0,
0,
PRIMARY_SCREEN.WorkingArea.Width,
PRIMARY_SCREEN.WorkingArea.Height,
SWP.SWP_NOREDRAW | SWP.SWP_ASYNCWINDOWPOS);
}
}
public Task ShowOverlayAsync(IMediaViewModel mediaModel, bool allowClosing)
{
return(ShowOverlayAsync(mediaModel, allowClosing, CancellationToken.None));
}
public Task ShowOverlayAsync(IMediaViewModel mediaModel, CancellationToken ct)
{
return(ShowOverlayAsync(mediaModel, true, ct));
}
public MainViewModel(IMediaViewModel mediaViewModel, IDrawingViewModel drawingViewModel)
{
MediaViewModel = mediaViewModel;
DrawingViewModel = drawingViewModel;
}
