private static int GetIndexOf(System.Windows.Interactivity.BehaviorCollection itemBehaviors, Behavior behavior)
{
int index = -1;
Behavior orignalBehavior = GetOriginalBehavior(behavior);
for (int i = 0; i < itemBehaviors.Count; i++)
{
Behavior currentBehavior = itemBehaviors[i];
if (currentBehavior == behavior ||
currentBehavior == orignalBehavior)
{
index = i;
break;
}
Behavior currentOrignalBehavior = GetOriginalBehavior(currentBehavior);
if (currentOrignalBehavior == behavior ||
currentOrignalBehavior == orignalBehavior)
{
index = i;
break;
}
}
return(index);
}
private static void OnTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DependencyObject target = d;
if (e.OldValue != null)
{
InteractivityTemplate interactivityTemplate = (InteractivityTemplate)e.OldValue;
InteractivityItems interactivityItems = (InteractivityItems)interactivityTemplate.LoadContent();
BehaviorCollection behaviorCollection = Interaction.GetBehaviors(target);
TriggerCollection triggerCollection = Interaction.GetTriggers(target);
interactivityItems.Behaviors.ForEach(x => behaviorCollection.Remove(x));
interactivityItems.Triggers.ForEach(x => triggerCollection.Remove(x));
}
if (e.NewValue != null)
{
InteractivityTemplate interactivityTemplate = (InteractivityTemplate)e.NewValue;
interactivityTemplate.Seal();
InteractivityItems interactivityItems = (InteractivityItems)interactivityTemplate.LoadContent();
BehaviorCollection behaviorCollection = Interaction.GetBehaviors(target);
TriggerCollection triggerCollection = Interaction.GetTriggers(target);
interactivityItems.Behaviors.ForEach(behaviorCollection.Add);
interactivityItems.Triggers.ForEach(triggerCollection.Add);
}
}
private static void OnBehaviorsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
System.Windows.Interactivity.BehaviorCollection behaviors = System.Windows.Interactivity.Interaction.GetBehaviors(d);
foreach (System.Windows.Interactivity.Behavior behavior in e.NewValue as StyleBehaviorCollection)
{
behaviors.Add((System.Windows.Interactivity.Behavior)behavior.Clone());
}
}
/// <summary>
/// Gets the System.Windows.Interactivity.BehaviorCollection associated with
/// a specified object.
/// </summary>
/// <param name="obj">The object from which to retrieve the System.Windows.Interactivity.BehaviorCollection.</param>
/// <returns>
/// A System.Windows.Interactivity.BehaviorCollection containing the behaviors
/// associated with the specified object.
/// </returns>
public static BehaviorCollection GetBehaviors(DependencyObject obj)
{
if (obj.GetValue(BehaviorsProperty) == null)
{
BehaviorCollection col = new BehaviorCollection();
col.Attach(obj);
obj.SetValue(BehaviorsProperty, col);
}
return((BehaviorCollection)obj.GetValue(BehaviorsProperty));
}
/// <summary>
/// Get the behavior list
/// </summary>
/// <param name="obj">Object to retrieve behavior collection from</param>
/// <returns>Behavior collection (empty if none)</returns>
public static BehaviorCollection GetBehaviors(DependencyObject obj)
{
var coll = (BehaviorCollection)obj.GetValue(BehaviorsProperty);
if (coll == null)
{
coll = new BehaviorCollection();
SetBehaviors(obj, coll);
}
return(coll);
}
public static BehaviorCollection GetBehaviors(DependencyObject obj)
{
BehaviorCollection value = (BehaviorCollection)obj.GetValue(Interaction.BehaviorsProperty);
if (value == null)
{
value = new BehaviorCollection();
obj.SetValue(Interaction.BehaviorsProperty, value);
}
return(value);
}
private static void OnBehaviorCollectionChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var uie = d as UIElement;
if (uie == null)
{
return;
}
System.Windows.Interactivity.BehaviorCollection itemBehaviors = Interaction.GetBehaviors(uie);
var newBehaviors = e.NewValue as BehaviorCollection;
var oldBehaviors = e.OldValue as BehaviorCollection;
if (newBehaviors == oldBehaviors)
{
return;
}
if (oldBehaviors != null)
{
foreach (var behavior in oldBehaviors)
{
int index = GetIndexOf(itemBehaviors, behavior);
if (index >= 0)
{
itemBehaviors.RemoveAt(index);
}
}
}
if (newBehaviors != null)
{
foreach (var behavior in newBehaviors)
{
int index = GetIndexOf(itemBehaviors, behavior);
if (index < 0)
{
var clone = (Behavior)behavior.Clone();
SetOriginalBehavior(clone, behavior);
itemBehaviors.Add(clone);
}
}
}
}
/// <summary>
/// This is called when the behavior collection is changed on an object.
/// </summary>
/// <param name="dpo">FrameworkElement owner</param>
/// <param name="e"></param>
private static void OnBehaviorListChanged(DependencyObject dpo, DependencyPropertyChangedEventArgs e)
{
BehaviorCollection list = e.OldValue as BehaviorCollection;
if (list != null)
{
list.Detach();
}
list = e.NewValue as BehaviorCollection;
FrameworkElement fe = dpo as FrameworkElement;
if (list != null && fe != null)
{
list.Attach(fe);
}
}
private static void OnBehaviorsChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
BehaviorCollection oldValue = (BehaviorCollection)args.OldValue;
BehaviorCollection newValue = (BehaviorCollection)args.NewValue;
if (oldValue != newValue)
{
if (oldValue != null && ((IAttachedObject)oldValue).AssociatedObject != null)
{
oldValue.Detach();
}
if (newValue != null && obj != null)
{
if (((IAttachedObject)newValue).AssociatedObject != null)
{
throw new InvalidOperationException(ExceptionStringTable.CannotHostBehaviorCollectionMultipleTimesExceptionMessage);
}
newValue.Attach(obj);
}
}
}
private static void OnTemplateChanged(
DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
InteractivityTemplate dt = (InteractivityTemplate)e.NewValue;
#if (!SILVERLIGHT)
dt.Seal();
#endif
InteractivityItems ih = (InteractivityItems)dt.LoadContent();
BehaviorCollection bc = Interaction.GetBehaviors(d);
TriggerCollection tc = Interaction.GetTriggers(d);
foreach (Behavior behavior in ih.Behaviors)
{
bc.Add(behavior);
}
foreach (TriggerBase trigger in ih.Triggers)
{
tc.Add(trigger);
}
}
/// <summary>
/// Sets the behavior list.
/// </summary>
/// <param name="obj">Object to set behavior collection on</param>
/// <param name="value">Collection to assign</param>
public static void SetBehaviors(DependencyObject obj, BehaviorCollection value)
{
obj.SetValue(BehaviorsProperty, value);
}
