// Helper method to retrieve and fire Clr Event handlers for DependencyPropertyChanged event
private void RaiseDependencyPropertyChanged(EventPrivateKey key, DependencyPropertyChangedEventArgs args)
{
EventHandlersStore store = EventHandlersStore;
if (store != null)
{
Delegate handler = store.Get(key);
if (handler != null)
{
((DependencyPropertyChangedEventHandler)handler)(this, args);
}
}
}
private void RaiseMouseButtonEvent(EventPrivateKey key, MouseButtonEventArgs e)
{
EventHandlersStore store = EventHandlersStore;
if (store != null)
{
Delegate handler = store.Get(key);
if (handler != null)
{
((MouseButtonEventHandler)handler)(this, e);
}
}
}
// Helper method to retrieve and fire the InheritedPropertyChanged event
internal void RaiseInheritedPropertyChangedEvent(ref InheritablePropertyChangeInfo info)
{
EventHandlersStore store = EventHandlersStore;
if (store != null)
{
Delegate handler = store.Get(FrameworkElement.InheritedPropertyChangedKey);
if (handler != null)
{
InheritedPropertyChangedEventArgs args = new InheritedPropertyChangedEventArgs(ref info);
((InheritedPropertyChangedEventHandler)handler)(this, args);
}
}
}
// 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);
}
/// <summary>
/// Copy constructor for EventHandlersStore
/// </summary>
public EventHandlersStore(EventHandlersStore source)
{
_entries = source._entries;
}
// 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);
}
/// <summary>
/// Add an event handler for the given routed event. This action applies to the instances created by this factory
/// </summary>
public void AddHandler(RoutedEvent routedEvent, Delegate handler, bool handledEventsToo)
{
if (_sealed)
{
throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "FrameworkElementFactory"));
}
if (routedEvent == null)
{
throw new ArgumentNullException("routedEvent");
}
if (handler == null)
{
throw new ArgumentNullException("handler");
}
if (handler.GetType() != routedEvent.HandlerType)
{
throw new ArgumentException(SR.Get(SRID.HandlerTypeIllegal));
}
if (_eventHandlersStore == null)
{
_eventHandlersStore = new EventHandlersStore();
}
_eventHandlersStore.AddRoutedEventHandler(routedEvent, handler, handledEventsToo);
// Keep track of whether we're listening to the loaded or unloaded events;
// if so, we have to trigger a listener in the FE/FCE (as a performance
// optimization).
if ( (routedEvent == FrameworkElement.LoadedEvent)
||(routedEvent == FrameworkElement.UnloadedEvent))
{
HasLoadedChangeHandler = true;
}
}
/// <summary>
/// Copy constructor for EventHandlersStore
/// </summary>
public EventHandlersStore(EventHandlersStore source)
{
_entries = source._entries;
}
//
// All table datastructures read-lock-free/write-lock
// AddEventDependent writes the datastructures, locks set by callers
//
// This method
// 1. Adds an EventDependent to the EventDependents list. This is used
// to lookup events in styles during event routing.
//
internal static void AddEventDependent(
int childIndex,
EventHandlersStore eventHandlersStore,
ref ItemStructList<ChildEventDependent> eventDependents)
{
if (eventHandlersStore != null)
{
Debug.Assert(childIndex >= 0);
ChildEventDependent dependent = new ChildEventDependent();
dependent.ChildIndex = childIndex;
dependent.EventHandlersStore = eventHandlersStore;
eventDependents.Add(ref dependent);
}
}
//
// This method
// 1. Adds shared table entries for property values set via Triggers
//
private static void ProcessTemplateTriggers(
TriggerCollection triggers,
FrameworkTemplate frameworkTemplate,
ref FrugalStructList<ChildRecord> childRecordFromChildIndex,
ref FrugalStructList<ItemStructMap<TriggerSourceRecord>> triggerSourceRecordFromChildIndex,
ref FrugalStructList<ContainerDependent> containerDependents,
ref FrugalStructList<ChildPropertyDependent> resourceDependents,
ref ItemStructList<ChildEventDependent> eventDependents,
ref HybridDictionary dataTriggerRecordFromBinding,
HybridDictionary childIndexFromChildID,
ref bool hasInstanceValues,
ref HybridDictionary triggerActions,
FrameworkElementFactory templateRoot,
ref EventHandlersStore eventHandlersStore,
ref FrugalMap propertyTriggersWithActions,
ref HybridDictionary dataTriggersWithActions,
ref bool hasLoadedChangeHandler)
{
if (triggers != null)
{
int triggerCount = triggers.Count;
for (int i = 0; i < triggerCount; i++)
{
TriggerBase triggerBase = triggers[i];
Trigger trigger;
MultiTrigger multiTrigger;
DataTrigger dataTrigger;
MultiDataTrigger multiDataTrigger;
EventTrigger eventTrigger;
DetermineTriggerType( triggerBase, out trigger, out multiTrigger, out dataTrigger, out multiDataTrigger, out eventTrigger );
if ( trigger != null || multiTrigger != null||
dataTrigger != null || multiDataTrigger != null )
{
// Update the SourceChildIndex for each of the conditions for this trigger
TriggerCondition[] conditions = triggerBase.TriggerConditions;
for (int k=0; k<conditions.Length; k++)
{
conditions[k].SourceChildIndex = StyleHelper.QueryChildIndexFromChildName(conditions[k].SourceName, childIndexFromChildID);
}
// Set things up to handle Setter values
for (int j = 0; j < triggerBase.PropertyValues.Count; j++)
{
PropertyValue propertyValue = triggerBase.PropertyValues[j];
// Check for trigger rules that act on template children
if (propertyValue.ChildName == StyleHelper.SelfName)
{
// "Self" (container) trigger
// Track properties on the container that are being driven by
// the Template so that they can be invalidated during Template changes
StyleHelper.AddContainerDependent(propertyValue.Property, true /*fromVisualTrigger*/, ref containerDependents);
}
StyleHelper.UpdateTables(ref propertyValue, ref childRecordFromChildIndex,
ref triggerSourceRecordFromChildIndex, ref resourceDependents, ref dataTriggerRecordFromBinding,
childIndexFromChildID, ref hasInstanceValues);
}
// Set things up to handle TriggerActions
if( triggerBase.HasEnterActions || triggerBase.HasExitActions )
{
if( trigger != null )
{
StyleHelper.AddPropertyTriggerWithAction( triggerBase, trigger.Property, ref propertyTriggersWithActions );
}
else if( multiTrigger != null )
{
for( int k = 0; k < multiTrigger.Conditions.Count; k++ )
{
Condition triggerCondition = multiTrigger.Conditions[k];
StyleHelper.AddPropertyTriggerWithAction( triggerBase, triggerCondition.Property, ref propertyTriggersWithActions );
}
}
else if( dataTrigger != null )
{
StyleHelper.AddDataTriggerWithAction( triggerBase, dataTrigger.Binding, ref dataTriggersWithActions );
}
else if( multiDataTrigger != null )
{
for( int k = 0; k < multiDataTrigger.Conditions.Count; k++ )
{
Condition dataCondition = multiDataTrigger.Conditions[k];
StyleHelper.AddDataTriggerWithAction( triggerBase, dataCondition.Binding, ref dataTriggersWithActions );
}
}
else
{
throw new InvalidOperationException(SR.Get(SRID.UnsupportedTriggerInTemplate, triggerBase.GetType().Name));
}
}
}
else if( eventTrigger != null )
{
StyleHelper.ProcessEventTrigger(eventTrigger,
childIndexFromChildID,
ref triggerActions,
ref eventDependents,
templateRoot,
frameworkTemplate,
ref eventHandlersStore,
ref hasLoadedChangeHandler);
}
else
{
throw new InvalidOperationException(SR.Get(SRID.UnsupportedTriggerInTemplate, triggerBase.GetType().Name));
}
}
}
}
// ===========================================================================
// These methods are invoked when a Style/Template is Sealed
// ===========================================================================
#region WriteMethods
//
// This method
// 1. Seals a template
//
internal static void SealTemplate(
FrameworkTemplate frameworkTemplate,
ref bool isSealed,
FrameworkElementFactory templateRoot,
TriggerCollection triggers,
ResourceDictionary resources,
HybridDictionary childIndexFromChildID,
ref FrugalStructList<ChildRecord> childRecordFromChildIndex,
ref FrugalStructList<ItemStructMap<TriggerSourceRecord>> triggerSourceRecordFromChildIndex,
ref FrugalStructList<ContainerDependent> containerDependents,
ref FrugalStructList<ChildPropertyDependent> resourceDependents,
ref ItemStructList<ChildEventDependent> eventDependents,
ref HybridDictionary triggerActions,
ref HybridDictionary dataTriggerRecordFromBinding,
ref bool hasInstanceValues,
ref EventHandlersStore eventHandlersStore)
{
Debug.Assert(frameworkTemplate != null );
// This template has already been sealed.
// There is no more to do.
if (isSealed)
{
return;
}
// Seal template nodes (if exists)
if (frameworkTemplate != null)
{
frameworkTemplate.ProcessTemplateBeforeSeal();
}
if (templateRoot != null)
{
Debug.Assert( !frameworkTemplate.HasXamlNodeContent );
// Seal the template
Debug.Assert(frameworkTemplate != null);
//frameworkTemplate.ProcessTemplateBeforeSeal();
templateRoot.Seal(frameworkTemplate);
}
// Seal triggers
if (triggers != null)
{
triggers.Seal();
}
// Seal Resource Dictionary
if (resources != null)
{
resources.IsReadOnly = true;
}
// Build shared tables
if (templateRoot != null)
{
// This is a FEF-style template. Process the root node, and it will
// recurse through the rest of the FEF tree.
StyleHelper.ProcessTemplateContentFromFEF(
templateRoot,
ref childRecordFromChildIndex,
ref triggerSourceRecordFromChildIndex,
ref resourceDependents,
ref eventDependents,
ref dataTriggerRecordFromBinding,
childIndexFromChildID,
ref hasInstanceValues);
}
// Process Triggers. (Trigger PropertyValues are inserted
// last into the Style/Template GetValue chain because they
// are the highest priority)
bool hasHandler = false;
Debug.Assert( frameworkTemplate != null );
StyleHelper.ProcessTemplateTriggers(
triggers,
frameworkTemplate,
ref childRecordFromChildIndex,
ref triggerSourceRecordFromChildIndex, ref containerDependents, ref resourceDependents, ref eventDependents,
ref dataTriggerRecordFromBinding, childIndexFromChildID, ref hasInstanceValues,
ref triggerActions, templateRoot, ref eventHandlersStore,
ref frameworkTemplate.PropertyTriggersWithActions,
ref frameworkTemplate.DataTriggersWithActions,
ref hasHandler );
frameworkTemplate.HasLoadedChangeHandler = hasHandler;
frameworkTemplate.SetResourceReferenceState();
// All done, seal self and call it a day.
isSealed = true;
// Remove thread affinity so it can be accessed across threads
frameworkTemplate.DetachFromDispatcher();
// Check if the template has the Template property set on the container via its visual triggers.
// It is an error to specify the TemplateProperty in your own Template.
if (StyleHelper.IsSetOnContainer(Control.TemplateProperty, ref containerDependents, true) ||
StyleHelper.IsSetOnContainer(ContentPresenter.TemplateProperty, ref containerDependents, true))
{
throw new InvalidOperationException(SR.Get(SRID.CannotHavePropertyInTemplate, Control.TemplateProperty.Name));
}
// Check if the template has the Style property set on the container via its visual triggers.
// It is an error to specify the StyleProperty in your own Template.
if (StyleHelper.IsSetOnContainer(FrameworkElement.StyleProperty, ref containerDependents, true))
{
throw new InvalidOperationException(SR.Get(SRID.CannotHavePropertyInTemplate, FrameworkElement.StyleProperty.Name));
}
// Check if the template has the DefaultStyleKey property set on the container via its visual triggers.
// It is an error to specify the DefaultStyleKeyProperty in your own Template.
if (StyleHelper.IsSetOnContainer(FrameworkElement.DefaultStyleKeyProperty, ref containerDependents, true))
{
throw new InvalidOperationException(SR.Get(SRID.CannotHavePropertyInTemplate, FrameworkElement.DefaultStyleKeyProperty.Name));
}
// Check if the template has the OverridesDefaultStyle property set on the container via its visual triggers.
// It is an error to specify the OverridesDefaultStyleProperty in your own Template.
if (StyleHelper.IsSetOnContainer(FrameworkElement.OverridesDefaultStyleProperty, ref containerDependents, true))
{
throw new InvalidOperationException(SR.Get(SRID.CannotHavePropertyInTemplate, FrameworkElement.OverridesDefaultStyleProperty.Name));
}
// Check if the template has the Name property set on the container via its visual triggers.
// It is an error to specify the Name in your own Template.
if (StyleHelper.IsSetOnContainer(FrameworkElement.NameProperty, ref containerDependents, true))
{
throw new InvalidOperationException(SR.Get(SRID.CannotHavePropertyInTemplate, FrameworkElement.NameProperty.Name));
}
}
//+---------------------------------------------------------------------------------------
//
// AddDelegateToFireTrigger
//
// Add the EventTriggerHandlerOnChild to listen for an event, like the above overload
// except this is for baml-style templates, rather than FEF-style.
//
//+---------------------------------------------------------------------------------------
private static void AddDelegateToFireTrigger(
RoutedEvent routedEvent,
int childIndex,
ref ItemStructList<ChildEventDependent> eventDependents,
ref EventHandlersStore eventHandlersStore)
{
Debug.Assert( childIndex != 0 ); // This should go to the other AddDelegateToFireTrigger overload
if (eventHandlersStore == null)
{
eventHandlersStore = new EventHandlersStore();
}
StyleHelper.AddEventDependent( childIndex,
eventHandlersStore,
ref eventDependents );
eventHandlersStore.AddRoutedEventHandler(routedEvent, StyleHelper.EventTriggerHandlerOnChild, false/* HandledEventsToo */);
}
//
// This method
// 1. Adds a delegate that will get called during event routing and
// will allow us to invoke the TriggerActions
//
private static void AddDelegateToFireTrigger(
RoutedEvent routedEvent,
int childIndex,
FrameworkElementFactory templateRoot,
FrameworkElementFactory childFef,
ref ItemStructList<ChildEventDependent> eventDependents,
ref EventHandlersStore eventHandlersStore)
{
if (childIndex == 0)
{
if (eventHandlersStore == null)
{
eventHandlersStore = new EventHandlersStore();
// Add an entry in the EventDependents list for
// the TargetType's EventHandlersStore. Notice
// that the childIndex is 0.
StyleHelper.AddEventDependent(0, eventHandlersStore, ref eventDependents);
}
eventHandlersStore.AddRoutedEventHandler(routedEvent, StyleHelper.EventTriggerHandlerOnContainer, false/* HandledEventsToo */);
}
else
{
//FrameworkElementFactory fef = StyleHelper.FindFEF(templateRoot, childIndex);
if (childFef.EventHandlersStore == null)
{
childFef.EventHandlersStore = new EventHandlersStore();
// Add an entry in the EventDependents list for
// the current FEF's EventHandlersStore.
StyleHelper.AddEventDependent(childIndex, childFef.EventHandlersStore, ref eventDependents);
}
childFef.EventHandlersStore.AddRoutedEventHandler(routedEvent, StyleHelper.EventTriggerHandlerOnChild, false/* HandledEventsToo */);
}
}
//
// This method
// 1. Adds the trigger information to the data structure that will be
// used when it's time to add the delegate to the event route.
//
internal static void ProcessEventTrigger (
EventTrigger eventTrigger,
HybridDictionary childIndexFromChildName,
ref HybridDictionary triggerActions,
ref ItemStructList<ChildEventDependent> eventDependents,
FrameworkElementFactory templateRoot,
FrameworkTemplate frameworkTemplate,
ref EventHandlersStore eventHandlersStore,
ref bool hasLoadedChangeHandler)
{
if( eventTrigger == null )
{
return;
}
// The list of actions associated with the event of this EventTrigger.
List<TriggerAction> actionsList = null;
bool actionsListExisted = true;
bool actionsListChanged = false;
TriggerAction action = null;
FrameworkElementFactory childFef = null;
// Find a ChildID for the EventTrigger.
if( eventTrigger.SourceName == null )
{
eventTrigger.TriggerChildIndex = 0;
}
else
{
int childIndex = StyleHelper.QueryChildIndexFromChildName(eventTrigger.SourceName, childIndexFromChildName);
if( childIndex == -1 )
{
throw new InvalidOperationException(SR.Get(SRID.EventTriggerTargetNameUnresolvable, eventTrigger.SourceName));
}
eventTrigger.TriggerChildIndex = childIndex;
}
// We have at least one EventTrigger - will need triggerActions
// if it doesn't already exist
if (triggerActions == null)
{
triggerActions = new HybridDictionary();
}
else
{
actionsList = triggerActions[eventTrigger.RoutedEvent] as List<TriggerAction>;
}
// Set up TriggerAction list if one doesn't already exist
if (actionsList == null)
{
actionsListExisted = false;
actionsList = new List<TriggerAction>();
}
for (int i = 0; i < eventTrigger.Actions.Count; i++)
{
action = eventTrigger.Actions[i];
// Any reason we shouldn't use this TriggerAction? Check here.
if( false /* No reason not to use it right now */ )
{
// continue;
}
// Looks good, add to list.
Debug.Assert(action.IsSealed, "TriggerAction should have already been sealed by this point.");
actionsList.Add(action);
actionsListChanged = true;
}
if (actionsListChanged && !actionsListExisted)
{
triggerActions[eventTrigger.RoutedEvent] = actionsList;
}
// Add a special delegate to listen for this event and
// fire the trigger.
if( templateRoot != null || eventTrigger.TriggerChildIndex == 0 )
{
// This is a FEF-style template, or the trigger is keying off of
// the templated parent.
// Get the FEF that is referenced by this trigger.
if (eventTrigger.TriggerChildIndex != 0)
{
childFef = StyleHelper.FindFEF(templateRoot, eventTrigger.TriggerChildIndex);
}
// If this trigger needs the loaded/unloaded events, set the optimization
// flag.
if ( (eventTrigger.RoutedEvent == FrameworkElement.LoadedEvent)
||(eventTrigger.RoutedEvent == FrameworkElement.UnloadedEvent))
{
if (eventTrigger.TriggerChildIndex == 0)
{
// Mark the template to show it has a loaded or unloaded handler
hasLoadedChangeHandler = true;
}
else
{
// Mark the FEF to show it has a loaded or unloaded handler
childFef.HasLoadedChangeHandler = true;
}
}
// Add a delegate that'll come back and fire these actions.
// This information will be used by FrameworkElement.AddStyleHandlersToEventRoute
StyleHelper.AddDelegateToFireTrigger(eventTrigger.RoutedEvent,
eventTrigger.TriggerChildIndex,
templateRoot,
childFef,
ref eventDependents,
ref eventHandlersStore);
}
else
{
// This is a baml-style template.
// If this trigger needs the loaded/unloaded events, set the optimization
// flag.
if (eventTrigger.RoutedEvent == FrameworkElement.LoadedEvent
||
eventTrigger.RoutedEvent == FrameworkElement.UnloadedEvent )
{
FrameworkTemplate.TemplateChildLoadedFlags templateChildLoadedFlags
= frameworkTemplate._TemplateChildLoadedDictionary[ eventTrigger.TriggerChildIndex ] as FrameworkTemplate.TemplateChildLoadedFlags;
if( templateChildLoadedFlags == null )
{
templateChildLoadedFlags = new FrameworkTemplate.TemplateChildLoadedFlags();
frameworkTemplate._TemplateChildLoadedDictionary[ eventTrigger.TriggerChildIndex ] = templateChildLoadedFlags;
}
if( eventTrigger.RoutedEvent == FrameworkElement.LoadedEvent )
{
templateChildLoadedFlags.HasLoadedChangedHandler = true;
}
else
{
templateChildLoadedFlags.HasUnloadedChangedHandler = true;
}
}
// Add a delegate that'll come back and fire these actions.
StyleHelper.AddDelegateToFireTrigger(eventTrigger.RoutedEvent,
eventTrigger.TriggerChildIndex,
ref eventDependents,
ref eventHandlersStore);
}
}
/// <summary>
/// Adds a delegate to the list of event handlers on this object.
/// </summary>
/// <param name="key">
/// A unique identifier for the event handler.
/// </param>
/// <param name="handler">The delegate to add.</param>
private void AddEventHandler(EventPrivateKey key, Delegate handler)
{
WritePreamble();
EventHandlersStore store = EventHandlersStoreField.GetValue(this);
if (store == null)
{
store = new EventHandlersStore();
EventHandlersStoreField.SetValue(this, store);
}
store.Add(key, handler);
WritePostscript();
}
