/// <summary>
/// Cancels the editing of the data.
/// </summary>
Task <bool> MVVM.IViewModel.CancelViewModel()
{
return(Task.Factory.StartNew(() =>
{
if (IsClosed)
{
return false;
}
var cancelingEventArgs = new CancelingEventArgs();
_catelCanceling.SafeInvoke(this, cancelingEventArgs);
if (cancelingEventArgs.Cancel)
{
return false;
}
if (base.CanCancel)
{
base.DoCancel();
}
_catelCanceled.SafeInvoke(this);
return true;
}));
}
/// <summary>
/// Handles the Canceling event of the parent ViewModel.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="CancelingEventArgs"/> instance containing the event data.</param>
private async Task OnParentViewModelCancelingAsync(object sender, CancelingEventArgs e)
{
// The parent view model is canceled, cancel our view model as well
if (ViewModel != null)
{
if (ReferenceEquals(sender, ViewModel))
{
Log.Warning("Parent view model '{0}' is exactly the same instance as the current view model, ignore Canceling event", sender.GetType().FullName);
return;
}
if (e.Cancel)
{
Log.Info("Parent view model '{0}' is canceling, but canceling is canceled by another view model, canceling of view model '{1}' will not continue", _parentViewModel.GetType(), ViewModel.GetType());
return;
}
Log.Info("Parent view model '{0}' is canceled, cancelling view model '{1}' as well", _parentViewModel.GetType(), ViewModel.GetType());
if (!ViewModel.IsClosed)
{
e.Cancel = !await ViewModel.CancelViewModelAsync();
}
}
}
/// <summary>
/// Cancels the editing of the data.
/// </summary>
bool MVVM.IViewModel.CancelViewModel()
{
if (IsClosed)
{
return(false);
}
var cancelingEventArgs = new CancelingEventArgs();
_catelCanceling.SafeInvoke(this, cancelingEventArgs);
if (cancelingEventArgs.Cancel)
{
return(false);
}
if (base.CanCancel)
{
base.DoCancel();
}
_catelCanceled.SafeInvoke(this);
return(true);
}
private async Task ViewModelOnCancelingAsync(object sender, CancelingEventArgs e)
{
_closingViewModel = new ProgressWindowViewModel();
_closingViewModel.Title = "Cancelling...";
_closingViewModel.SetOwnerWindow(this);
_visualizerService.ShowDialogAsync(_closingViewModel);
}
private static Task OnViewModelCancelingAsync(object sender, CancelingEventArgs e)
{
if (!AuditingManager.IsAuditingEnabled)
{
return(TaskHelper.Completed);
}
AuditingManager.OnViewModelCanceling((IViewModel)sender);
return(TaskHelper.Completed);
}
private static Task OnViewModelCancelingAsync(object sender, CancelingEventArgs e)
{
if (!AuditingManager.IsAuditingEnabled)
{
return TaskHelper.Completed;
}
AuditingManager.OnViewModelCanceling((IViewModel)sender);
return TaskHelper.Completed;
}
/// <summary>
/// Handles the Canceling event of the parent ViewModel.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="CancelingEventArgs"/> instance containing the event data.</param>
private async Task OnParentViewModelCancelingAsync(object sender, CancelingEventArgs e)
{
// The parent view model is canceled, cancel our view model as well
if (ViewModel != null)
{
if (ReferenceEquals(sender, ViewModel))
{
Log.Warning("Parent view model '{0}' is exactly the same instance as the current view model, ignore Canceling event", sender.GetType().FullName);
return;
}
if (e.Cancel)
{
Log.Info("Parent view model '{0}' is canceling, but canceling is canceled by another view model, canceling of view model '{1}' will not continue", _parentViewModel.GetType(), ViewModel.GetType());
return;
}
Log.Info("Parent view model '{0}' is canceled, cancelling view model '{1}' as well", _parentViewModel.GetType(), ViewModel.GetType());
if (!ViewModel.IsClosed)
{
e.Cancel = !await ViewModel.CancelViewModelAsync();
}
}
}
private static void OnViewModelCanceling(object sender, CancelingEventArgs e)
{
AuditingManager.OnViewModelCanceling((IViewModel)sender);
}
private static void OnViewModelCanceling(object sender, CancelingEventArgs e)
{
AuditingManager.OnViewModelCanceling((IViewModel)sender);
}
