/// <summary>
/// Handles changes to the Event property.
/// </summary>
private static void OnEventChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (e.NewValue == null)
{
return;
}
var eventName = (string)e.NewValue;
if (string.IsNullOrEmpty(eventName))
{
return;
}
CommandBehaviorBinding binding = FetchOrCreateBinding(d);
//check if the Event is set. If yes we need to rebind the Command to the new event and unregister the old one
if (binding.Event != null && binding.Owner != null)
{
binding.Dispose();
}
//bind the new event to the command
binding.BindEvent(d, eventName);
}
/// <summary>
/// Handles changes to the Command property.
/// </summary>
private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CommandBehaviorBinding binding = FetchOrCreateBinding(d);
binding.Command = (ICommand)e.NewValue;
}
/// <summary>
/// Sets the Behavior property.
/// </summary>
private static void SetBehavior(DependencyObject d, CommandBehaviorBinding value)
{
d.SetValue(BehaviorProperty, value);
}
/// <summary>
/// Handles changes to the Action property.
/// </summary>
private static void OnActionChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CommandBehaviorBinding binding = FetchOrCreateBinding(d);
binding.Action = (Action <object>)e.NewValue;
}