/// <summary>
/// Sets the <see cref="BehaviourCollection"/> associated with a specified object.
/// </summary>
/// <param name="dependencyObject">The <see cref="DependencyObject"/> on which to set the <see cref="BehaviourCollection"/>.</param>
/// <param name="value">The <see cref="BehaviourCollection"/> associated with the object.</param>
/// <exception cref="ArgumentNullException">Parameter <paramref name="dependencyObject"/> is null</exception>
public static void SetBehaviours(DependencyObject dependencyObject, BehaviourCollection value)
{
if (dependencyObject == null)
{
throw new ArgumentNullException(nameof(dependencyObject));
}
dependencyObject.SetValue(Interaction.BehavioursProperty, value);
}
/// <summary>
/// Gets the <see cref="BehaviourCollection"/> associated with a specified object.
/// </summary>
/// <param name="dependencyObject">The <see cref="DependencyObject"/> from which to retrieve the <see cref="BehaviourCollection"/>.</param>
/// <returns>A <see cref="BehaviourCollection"/> containing the behaviors associated with the specified object.</returns>
public static BehaviourCollection GetBehaviours(DependencyObject dependencyObject)
{
var list = dependencyObject.GetValue(Interaction.BehavioursProperty) as BehaviourCollection;
if (list == null)
{
list = new BehaviourCollection(dependencyObject);
dependencyObject.SetValue(Interaction.BehavioursProperty, list);
}
return(list);
}
private static void OnTemplateChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args)
{
var dt = args.NewValue as InteractionTemplate;
if (dt == null)
{
return;
}
BehaviourCollection bc = Interaction.GetBehaviours(dependencyObject);
// Remove all behaviours first that were assigned by this class
bc.RemoveAllTemplateAssignedBehaviours();
// Then let us create a shallow copy of all behaviours
foreach (IBehaviour behavior in dt)
{
bc.Add(behavior.Copy());
}
}