private static void TryReplaceStyleBehaviors(BehaviorBindingCollection behaviors, IList oldBehaviors, IList newBehaviors, bool disposeBehaviors)
{
for (int i = 0; i < oldBehaviors.Count; i++)
{
var oldItem = (Behavior)oldBehaviors[i];
var newItem = (Behavior)newBehaviors[i];
var clonedBehavior = newItem.Clone() as Behavior;
newItem.Owner = clonedBehavior.Owner = behaviors.Owner;
newItem.Id = oldItem.Id;
if (disposeBehaviors)
{
(oldItem as BehaviorBinding)?.Behavior.Dispose();
}
for (int j = 0; j < behaviors.Count; j++)
{
if (behaviors[j].Id == oldItem.Id)
{
behaviors[j] = clonedBehavior;
}
}
}
}
private static void TryRemoveStyleBehaviors(BehaviorBindingCollection behaviors, IList behaviorsToRemove, bool disposeBehaviors)
{
if (disposeBehaviors)
{
foreach (BehaviorBinding behavior in behaviorsToRemove.OfType <BehaviorBinding>())
{
behavior.Behavior.Dispose();
}
}
if (behaviors != null)
{
for (int i = 0; i < behaviorsToRemove.Count; i++)
{
for (int j = 0; j < behaviors.Count; j++)
{
if (((Behavior)behaviorsToRemove[i]).Id == behaviors[j].Id)
{
// We don't need to dispose the behaviors from the 'behaviors' colelction parameter here, because they will be disposed automatically by the CollectionChanged event handler
behaviors.RemoveAt(j);
}
}
}
}
}
private static void AddStyleBehaviors(BehaviorBindingCollection behaviors, IList behaviorsToAdd)
{
foreach (Behavior behavior in behaviorsToAdd)
{
var _behavior = behavior.Clone() as Behavior;
behaviors.Add(_behavior as Behavior);
behavior.Id = _behavior.Id;
}
}
/// <summary>
/// Gets the Behaviors property.
/// Here we initialze the collection and set the Owner property
/// </summary>
public static BehaviorBindingCollection GetBehaviors(DependencyObject d)
{
if (d == null)
{
throw new InvalidOperationException("The dependency object trying to attach to is set to null");
}
var collection = d.GetValue(CommandBehaviorCollection.BehaviorsProperty) as BehaviorBindingCollection;
if (collection == null)
{
collection = new BehaviorBindingCollection();
collection.Owner = d;
SetBehaviors(d, collection);
}
return collection;
}
/// <summary>
/// Gets the Behaviors property.
/// Here we initialze the collection and set the Owner property
/// </summary>
public static BehaviorBindingCollection GetBehaviors(DependencyObject d)
{
if (d == null)
{
throw new InvalidOperationException("The dependency object trying to attach to is set to null");
}
if (!(d.GetValue(BehaviorsProperty) is BehaviorBindingCollection collection))
{
collection = new BehaviorBindingCollection
{
Owner = d
};
SetBehaviors(d, collection);
}
return(collection);
}
// ReSharper restore ReturnTypeCanBeEnumerable.Global
// ReSharper restore StaticFieldInitializersReferesToFieldBelow
/// <summary>
/// Gets behaviors property.
/// </summary>
/// <param name="dependencyObject">Instance of dependency object.</param>
/// <returns>Returns behavior binding collection.</returns>
// ReSharper disable ReturnTypeCanBeEnumerable.Global
public static BehaviorBindingCollection GetBehaviors(DependencyObject dependencyObject)
{
if (null == dependencyObject)
{
throw new InvalidOperationException("Dependency object trying to attach to is set to null");
}
var behaviorBindingCollection = dependencyObject.GetValue(BehaviorsProperty) as BehaviorBindingCollection;
if (null == behaviorBindingCollection)
{
// ReSharper disable UseObjectOrCollectionInitializer
behaviorBindingCollection = new BehaviorBindingCollection();
// ReSharper restore UseObjectOrCollectionInitializer
behaviorBindingCollection.Owner = dependencyObject;
SetBehaviors(dependencyObject, behaviorBindingCollection);
}
return behaviorBindingCollection;
}
static int GetId(BehaviorBindingCollection sourceCollection) => sourceCollection.Count == 1 ? 1 : sourceCollection[sourceCollection.Count - 1].Id + 1;
/// <summary>
/// Provides a secure method for setting the Behaviors property.
/// This dependency property indicates ....
/// </summary>
private static void SetBehaviors(DependencyObject d, BehaviorBindingCollection value)
{
d.SetValue(BehaviorsPropertyKey, value);
((INotifyCollectionChanged)value).CollectionChanged += CollectionChanged;
}
public static void SetStyleBehaviors(DependencyObject obj, BehaviorBindingCollection value) => obj.SetValue(StyleBehaviorsProperty, value);
/// <summary>
/// Provides way to set behavior property.
/// </summary>
/// <param name="dependencyObject">Instance of dependency object.</param>
/// <param name="behaviorBindingCollection">Behavior binding collection.</param>
private static void SetBehaviors(DependencyObject dependencyObject, BehaviorBindingCollection behaviorBindingCollection)
{
if (null == dependencyObject || null == behaviorBindingCollection)
{
return;
}
dependencyObject.SetValue(BehaviorsPropertyKey, behaviorBindingCollection);
INotifyCollectionChanged behaviorBindingCollectionCasted = behaviorBindingCollection;
behaviorBindingCollectionCasted.CollectionChanged += OnCollectionChanged;
}
/// <summary>
/// Provides a secure method for setting the Behaviors property.
/// This dependency property indicates ....
/// </summary>
private static void SetBehaviors(DependencyObject d, BehaviorBindingCollection value)
{
d.SetValue(BehaviorsPropertyKey, value);
var collection = value as INotifyCollectionChanged;
collection.CollectionChanged += new NotifyCollectionChangedEventHandler(CollectionChanged);
}