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)));
}
private void StartDialog(IProgressItemViewModel <T> itemViewModel)
{
DispatcherViewFactory.InvokeAsync("Secondary GUI", () =>
{
var window = _window;
if (window == null)
{
window = _window = PrepareProgressView();
AddProgressItem(window, itemViewModel);
window.Closing += HandleWindowClosing;
window.Show();
}
else
{
AddProgressItem(window, itemViewModel);
}
}).ConfigureAwait(false);
}
private bool CanResume(IProgressItemViewModel item)
{
return(item != null && item.ResumeCommand.CanExecute(null));
}
private void HandleResume(IProgressItemViewModel item)
{
item.ResumeCommand.TryExecute(null);
}
private void HandlePause(IProgressItemViewModel item)
{
item.PauseCommand.TryExecute(null);
}
private void HandleCompletedOrCanceled(DisposeManager cleanup, Window window, ProgressViewModel viewModel, IProgressItemViewModel <T> itemViewModel, bool isCompleted)
{
cleanup.Dispose();
window.Dispatcher.CheckedInvoke(() =>
{
viewModel.ProgressItems.Remove(itemViewModel);
if (viewModel.ProgressItems.Count == 0)
{
Task.Delay(1000);
if (_window != null && _window.IsVisible)
{
viewModel.OkCommand.TryExecute(null);
}
_window = null;
var result = new AsyncActivityResult <IProgressItemViewModel <T> >(isCompleted, itemViewModel);
Completion.TrySetResult(result);
}
});
}
