protected override void OnClosing(Window window, ICloseableViewModel viewModel)
{
CancelEventHandler handler = null;
handler = (s, e) =>
{
if (!viewModel.OnClosing())
{
e.Cancel = true;
return;
}
window.Closing -= handler;
};
window.Closing += handler;
}
protected override void OnClosing(RadWindow window, ICloseableViewModel viewModel)
{
EventHandler <WindowPreviewClosedEventArgs> handler = null;
handler = (s, e) =>
{
if (!viewModel.OnClosing())
{
e.Cancel = true;
return;
}
window.PreviewClosed -= handler;
};
window.PreviewClosed += handler;
}
public void Post(string header, ICloseableViewModel viewModel)
{
var newMessage = new Message(header, viewModel);
newMessage.ViewModel.Closed
.Take(1)
.Subscribe(x =>
{
Message nextMessage = null;
lock (_sync)
{
_waitingMessages.Dequeue();
if (_waitingMessages.Any())
{
nextMessage = _waitingMessages.Peek();
}
}
if (nextMessage != null)
{
_show.OnNext(nextMessage);
}
viewModel.Dispose();
});
bool show;
lock (_sync)
{
_waitingMessages.Enqueue(newMessage);
show = _waitingMessages.Count == 1;
}
if (show)
{
_show.OnNext(newMessage);
}
}
private void CloseableViewModelOnClosed(ICloseableViewModel sender, ViewModelClosedEventArgs e)
{
_threadManager.Invoke(ExecutionMode.AsynchronousOnUiThread, this, NavigationService, e,
(provider, service, args) =>
{
if (ReferenceEquals(provider._closingViewModel, args.ViewModel))
{
return;
}
try
{
provider._closedFromViewModel = true;
if (service.TryClose(args.ViewModel, args.Parameter as IDataContext))
{
OnViewModelClosed(args.ViewModel, args.Parameter, provider, true);
}
}
finally
{
provider._closedFromViewModel = false;
}
});
}
public Message(string header, ICloseableViewModel viewModel)
{
Header = header;
ViewModel = viewModel;
}
private void ViewModelOnClosed(ICloseableViewModel sender, ViewModelClosedEventArgs args)
{
RaiseClosed(args.Parameter);
}
private void ViewModelOnClosing(ICloseableViewModel sender, ViewModelClosingEventArgs args)
{
args.Cancel = !RaiseClosing(args.Parameter);
}
private void CloseableViewModelOnClosed(ICloseableViewModel sender, ViewModelClosedEventArgs e)
{
_threadManager.Invoke(ExecutionMode.AsynchronousOnUiThread, this, NavigationService, e,
(provider, service, args) =>
{
if (ReferenceEquals(provider._closingViewModel, args.ViewModel))
return;
try
{
provider._closedFromViewModel = true;
if (service.TryClose(args.ViewModel, args.Parameter as IDataContext))
OnViewModelClosed(args.ViewModel, args.Parameter, provider, true);
}
finally
{
provider._closedFromViewModel = false;
}
});
}
private void CloseableViewModelOnClosed(ICloseableViewModel sender, ViewModelClosedEventArgs e)
{
TryCloseViewModel(e.ViewModel, e.Parameter);
}
protected abstract void OnClosing(T window, ICloseableViewModel viewModel);
private void CloseableViewModelOnClosed(ICloseableViewModel sender, ViewModelClosedEventArgs e)
{
TryCloseViewModel(e.ViewModel, e.Parameter);
}