protected virtual void OnCanExecuteChanged(IModel model)
{
foreach (EventCommandRef commandRef in EventCommands.GetCommandRefs(model, this))
{
WeakEvents.Call(_canExecuteChanged, h => h(commandRef, EventArgs.Empty));
}
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null || value == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var model = value as IModel;
if (model == null)
{
throw new ArgumentException("value must be IModel", "value");
}
EventCommand command = Command ?? Display.Command;
var commandRef = new EventCommandRef {
Command = command,
Display = Display,
Model = model,
};
EventCommands.AddCommandRef(model, command, commandRef);
return(commandRef);
}
protected void Subscribe(EventCommand command, Action execute, Func <bool> canExecute = null)
{
EventCommands.Subscribe(this, command, execute, canExecute);
}
protected void Unsubscribe()
{
EventCommands.Unsubscribe(this);
}
protected void Unsubscribe(EventCommand command)
{
EventCommands.Unsubscribe(this, command);
}