public AfterViewModelEventRaisedArgs(
IViewModelEvent @event,
ViewModelEventRoutingStrategy routingStrategy)
{
this.Event = @event;
this.RoutingStrategy = routingStrategy;
}
public ViewModelEventArgs(
IViewModel sender,
IViewModelEvent @event,
ViewModelEventRoutingStrategy routingStrategy)
{
this.Sender = sender;
this.Event = @event;
this.RoutingStrategy = routingStrategy;
}
void OnAfterViewModelEventRaised(
IViewModel viewModel,
IViewModelEvent ev,
ViewModelEventRoutingStrategy routingStrategy)
{
RaiseViewModelEvent(viewModel, ev, routingStrategy);
}
void RaiseViewModelEvent(IViewModel vm, IViewModelEvent ev, ViewModelEventRoutingStrategy routingStrategy)
{
if (routingStrategy.HasFlag(ViewModelEventRoutingStrategy.Bubble))
{
var preview_args = new ViewModelEventArgs(vm, ev, ViewModelEventRoutingStrategy.Bubble);
// Raise Bubbling WPF Routed Event
var wpf_preview_args = new ViewModelEventRoutedEventArgs(preview_args, PreviewViewModelEventProperty, this);
RaiseEvent(wpf_preview_args);
if (wpf_preview_args.Handled || preview_args.IsHandled)
return;
}
if (routingStrategy.HasFlag(ViewModelEventRoutingStrategy.Tunnel))
{
var args = new ViewModelEventArgs(vm, ev, ViewModelEventRoutingStrategy.Tunnel);
// Raise Tunneling WPF Routed Event
var wpf_args = new ViewModelEventRoutedEventArgs(args, ViewModelEventProperty, this);
RaiseEvent(wpf_args);
if (wpf_args.Handled || args.IsHandled)
return;
}
if(routingStrategy.HasFlag(ViewModelEventRoutingStrategy.BroadcastToChildren))
{
// search visual tree for children deriving from View
var children =
this.VisualTreeTraversal(
includeChildItemsControls: true,
traversalMode: TreeTraversalMode.BreadthFirst)
.OfType<View>();
var args = new ViewModelEventArgs(vm, ev, ViewModelEventRoutingStrategy.BroadcastToChildren);
foreach (var v in children)
{
v.OnViewModelEventInternal(args);
if (args.IsHandled)
return;
}
}
}
