public bool Contains(SetterBase setter)
{
if (setter == null)
{
throw new ArgumentNullException("setter");
}
return List.Contains(setter);
}
public void Add(SetterBase setter)
{
if (setter == null)
{
throw new ArgumentNullException("setter");
}
List.Add(setter);
}
/// <summary>
/// Initializes a new instance of the <see cref="SetterItem"/> class.
/// </summary>
public SetterItem(SetterBase setterBase, FrameworkElement source)
{
var setter = setterBase as Setter;
if (setter != null)
{
Property = setter.Property.Name;
if (setter.Value is DynamicResourceExtension)
{
var resourceKey = ((DynamicResourceExtension) setter.Value).ResourceKey;
Value = ResourceItemFactory.CreateResourceItem(resourceKey, source.Resources, source, ResourceScope.Style);
}
else if (setter.Value != null)
{
Value = setter.Value;
}
else
{
Value = "null";
}
}
}
public void Insert(int index, SetterBase setter)
{
if (setter == null)
{
throw new ArgumentNullException("setter");
}
List.Insert(index, setter);
}
public int IndexOf(SetterBase setter)
{
if (setter == null)
{
throw new ArgumentNullException("setter");
}
return List.IndexOf(setter);
}
public bool Remove(SetterBase setter)
{
if (setter == null)
{
throw new ArgumentNullException("setter");
}
if (List.Contains(setter) == false)
{
return false;
}
List.Remove(setter);
return true;
}
// Iterates through the setters collection and adds the EventSetter information into
// an EventHandlersStore for easy and fast retrieval during event routing. Also adds
// an entry in the EventDependents list for EventhandlersStore holding the TargetType's
// events.
private void ProcessSetters(Style style)
{
// Walk down to bottom of based-on chain
if (style == null)
{
return;
}
style.Setters.Seal(); // Does not mark individual setters as sealed, that's up to the loop below.
// On-demand create the PropertyValues list, so that we can specify the right size.
if (PropertyValues.Count == 0)
{
PropertyValues = new FrugalStructList <System.Windows.PropertyValue>(style.Setters.Count);
}
// Add EventSetters to local EventHandlersStore
for (int i = 0; i < style.Setters.Count; i++)
{
SetterBase setterBase = style.Setters[i];
Debug.Assert(setterBase != null, "Setter collection must contain non-null instances of SetterBase");
// Setters are folded into the PropertyValues table only for the current style. The
// processing of BasedOn Style properties will occur in subsequent call to ProcessSelfStyle
Setter setter = setterBase as Setter;
if (setter != null)
{
// Style Setters are not allowed to have a child target name - since there are no child nodes in a Style.
if (setter.TargetName != null)
{
throw new InvalidOperationException(SR.Get(SRID.SetterOnStyleNotAllowedToHaveTarget, setter.TargetName));
}
if (style == this)
{
DynamicResourceExtension dynamicResource = setter.ValueInternal as DynamicResourceExtension;
if (dynamicResource == null)
{
UpdatePropertyValueList(setter.Property, PropertyValueType.Set, setter.ValueInternal);
}
else
{
UpdatePropertyValueList(setter.Property, PropertyValueType.Resource, dynamicResource.ResourceKey);
}
}
}
else
{
Debug.Assert(setterBase is EventSetter,
"Unsupported SetterBase subclass in style triggers ({0})", setterBase.GetType().ToString());
// Add this to the _eventHandlersStore
EventSetter eventSetter = (EventSetter)setterBase;
if (_eventHandlersStore == null)
{
_eventHandlersStore = new EventHandlersStore();
}
_eventHandlersStore.AddRoutedEventHandler(eventSetter.Event, eventSetter.Handler, eventSetter.HandledEventsToo);
SetModified(HasEventSetter);
// If this event setter watches the loaded/unloaded events, set the optimization
// flag.
if (eventSetter.Event == FrameworkElement.LoadedEvent || eventSetter.Event == FrameworkElement.UnloadedEvent)
{
_hasLoadedChangeHandler = true;
}
}
}
// Process EventSetters on based on style so they get merged
// into the EventHandlersStore for the current style.
ProcessSetters(style._basedOn);
}
