/// <summary>
/// Return the default event. The default event is determined by the
/// presence of a DefaultEventAttribute on the class.
/// </summary>
internal EventDescriptor GetDefaultEvent(object instance)
{
AttributeCollection attributes;
if (instance != null)
{
attributes = TypeDescriptor.GetAttributes(instance);
}
else
{
attributes = TypeDescriptor.GetAttributes(_type);
}
DefaultEventAttribute attr = (DefaultEventAttribute)attributes[typeof(DefaultEventAttribute)];
if (attr != null && attr.Name != null)
{
if (instance != null)
{
return(TypeDescriptor.GetEvents(instance)[attr.Name]);
}
else
{
return(TypeDescriptor.GetEvents(_type)[attr.Name]);
}
}
return(null);
}
public bool FilterAttributes (IComponent component,IDictionary attributes)
{
Attribute ea = new DefaultEventAttribute ("AnEvent");
attributes [ea.TypeId] = ea;
ea = new DefaultPropertyAttribute ("TestProperty");
attributes [ea.TypeId] = ea;
ea = new EditorAttribute ();
attributes [ea.TypeId] = ea;
return true;
}
public EventDescriptor GetDefaultEvent()
{
if (this._gotDefaultEvent)
{
return(this._defaultEvent);
}
DefaultEventAttribute defaultEventAttribute = (DefaultEventAttribute)this.GetAttributes()[typeof(DefaultEventAttribute)];
if (defaultEventAttribute == null || defaultEventAttribute.Name == null)
{
this._defaultEvent = null;
}
else
{
EventDescriptorCollection events = this.GetEvents();
this._defaultEvent = events[defaultEventAttribute.Name];
}
this._gotDefaultEvent = true;
return(this._defaultEvent);
}
// Get the default event for a specified component type.
public static EventDescriptor GetDefaultEvent(Type componentType)
{
lock (typeof(TypeDescriptor))
{
TypeElement element = GetOrCreateElement(componentType);
if (element.defaultEvent != null)
{
return(element.defaultEvent);
}
DefaultEventAttribute attr = (DefaultEventAttribute)
GetAttributeForType(componentType,
typeof(DefaultEventAttribute));
if (attr != null && attr.Name != null)
{
element.defaultEvent =
CreateEvent(componentType, attr.Name, null, null);
return(element.defaultEvent);
}
else
{
return(null);
}
}
}
public EventDescriptor GetDefaultEvent()
{
if (_gotDefaultEvent)
{
return(_defaultEvent);
}
DefaultEventAttribute attr = (DefaultEventAttribute)GetAttributes()[typeof(DefaultEventAttribute)];
if (attr == null || attr.Name == null)
{
_defaultEvent = null;
}
else
{
EventDescriptorCollection events = GetEvents();
_defaultEvent = events [attr.Name];
#if !NET_2_0
// In our test case (TypeDescriptorTest.TestGetDefaultEvent), we have
// a scenario where a custom filter adds the DefaultEventAttribute,
// but its FilterEvents method removes the event the
// DefaultEventAttribute applied to. .NET 1.x accepts this and returns
// the *other* event defined in the class.
//
// Consequently, we know we have a DefaultEvent, but we need to check
// and ensure that the requested event is unfiltered. If it is, just
// grab the first element in the collection.
if (_defaultEvent == null && events.Count > 0)
{
_defaultEvent = events [0];
}
#endif
}
_gotDefaultEvent = true;
return(_defaultEvent);
}
public override bool Equals(object obj)
{
DefaultEventAttribute attribute = obj as DefaultEventAttribute;
return((attribute != null) && (attribute.Name == this.name));
}
public override bool Equals(object obj)
{
DefaultEventAttribute other = obj as DefaultEventAttribute;
return((other != null) && other.Name == name);
}
