|
public static FromId ( System.Guid desktopId ) : |
||
| desktopId | System.Guid | |
| Результат | ||
static IDisposable RegisterMinimalListener()
{
var window = new TransparentWindow();
window.Show();
Guid? desktopId = null;
var timeLimit = TimeSpan.FromSeconds(30);
var limitTimer = Stopwatch.StartNew();
COMException exception = null;
int attempts = 10;
while (limitTimer.Elapsed < timeLimit || attempts > 0)
{
attempts = Math.Max(0, attempts - 1);
try {
desktopId = VirtualDesktop.IdFromHwnd(window.Handle);
exception = null;
} catch (COMException ex) when(ex.Match(HResult.INVALID_STATE))
{
Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Background, new Action(() => {}));
if (limitTimer.Elapsed >= timeLimit && attempts <= 0)
{
throw;
}
exception = ex;
}
}
if (desktopId == null && exception != null && limitTimer.Elapsed >= timeLimit)
{
throw exception;
}
var timer = new DispatcherTimer(DispatcherPriority.Normal)
{
Interval = TimeSpan.FromMilliseconds(250),
IsEnabled = true,
};
timer.Tick += delegate {
var newId = VirtualDesktop.IdFromHwnd(window.Handle);
if (newId == null || newId == desktopId)
{
return;
}
var newDesktop = VirtualDesktop.FromId(newId.Value);
var oldDesktop = desktopId == null ? null : VirtualDesktop.FromId(desktopId.Value);
var changedArgs = new VirtualDesktopChangedEventArgs(oldDesktop, newDesktop);
CurrentChanged?.Invoke(typeof(VirtualDesktop), changedArgs);
desktopId = newId;
};
return(Disposable.Create(() => {
timer.Stop();
window.Close();
}));
}
static VirtualDesktop FromComObject(IVirtualDesktop virtualDesktop) =>
IsSupported
? VirtualDesktop.FromComObject(virtualDesktop)
: VirtualDesktop.FromId(virtualDesktop.GetID());
