/// <summary>
/// Change handler for the event name
/// </summary>
/// <param name="dpo">VMTrigger object</param>
/// <param name="e">EventArgs</param>
private static void OnEventNameChanged(DependencyObject dpo, DependencyPropertyChangedEventArgs e)
{
ViewModelTriggerBehavior vmt = (ViewModelTriggerBehavior)dpo;
if (vmt.Target == null)
{
return;
}
string oldEventName = e.OldValue as string;
if (!string.IsNullOrEmpty(oldEventName))
{
vmt.UnregisterEvent(vmt.Target, oldEventName);
}
vmt.RegisterEvent(vmt.Target, vmt.EventName);
}
/// <summary>
/// Change handler for the event name
/// </summary>
/// <param name="dpo">VMTrigger object</param>
/// <param name="e">EventArgs</param>
private static void OnTargetChanged(DependencyObject dpo, DependencyPropertyChangedEventArgs e)
{
ViewModelTriggerBehavior vmt = (ViewModelTriggerBehavior)dpo;
if (string.IsNullOrEmpty(vmt.EventName))
{
return;
}
object oldTarget = e.OldValue;
if (oldTarget != null)
{
vmt.UnregisterEvent(oldTarget, vmt.EventName);
}
vmt.RegisterEvent(vmt.Target, vmt.EventName);
}