private void AddProgressItem(Window window, IProgressItemViewModel <T> itemViewModel)
{
var viewModel = (ProgressViewModel)window.DataContext;
viewModel.ProgressItems.Add(itemViewModel);
var cleanup = new DisposeManager();
cleanup.AddEvent(h => itemViewModel.Completed += h, h => itemViewModel.Completed -= h,
(EventHandler)((s, e) => HandleCompletedOrCanceled(cleanup, window, viewModel, itemViewModel, true)));
cleanup.AddEvent(h => itemViewModel.Canceled += h, h => itemViewModel.Canceled -= h,
(EventHandler)((s, e) => HandleCompletedOrCanceled(cleanup, window, viewModel, itemViewModel, false)));
}
public static void SetupDataContextChanged <T>(this FrameworkElement element, Action <T> action) where T : class
{
var context = element.DataContext;
if (context != null)
{
if (action != null)
{
action.Invoke(context as T);
}
return;
}
var cleanup = new DisposeManager();
DependencyPropertyChangedEventHandler handler = (s, e) =>
{
cleanup.Dispose();
if (action != null)
{
action.Invoke(e.NewValue as T);
}
};
cleanup.AddEvent(h => element.DataContextChanged += h, h => element.DataContextChanged -= h, handler);
}
public static Task ShutdownAsync(this Dispatcher d)
{
var tcs = new TaskCompletionSource <int>();
var cleanup = new DisposeManager();
EventHandler handler = (s, e) =>
{
cleanup.Dispose();
tcs.TrySetResult(0);
};
cleanup.AddEvent(h => d.ShutdownFinished += h, h => d.ShutdownFinished -= h, handler);
d.BeginInvokeShutdown(DispatcherPriority.Normal);
return(tcs.Task);
}
public static void SetupLoaded(this FrameworkElement element, Action action)
{
if (element.IsLoaded)
{
action();
return;
}
var cleanup = new DisposeManager();
RoutedEventHandler handler = (s, e) =>
{
cleanup.Dispose();
action();
};
cleanup.AddEvent(h => element.Loaded += h, h => element.Loaded -= h, handler);
}
