112 lines
3.4 KiB
C#
112 lines
3.4 KiB
C#
//
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// System.ComponentModel.EventDescriptor.cs
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//
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// Authors:
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// Lluis Sanchez Gual (lluis@ximian.com)
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//
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// (C) Novell, Inc. 2004, 2005
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Runtime.InteropServices;
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using System.Collections;
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using System.Reflection;
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namespace System.ComponentModel
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{
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internal class ReflectionEventDescriptor: EventDescriptor
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{
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Type _eventType;
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Type _componentType;
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EventInfo _eventInfo;
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MethodInfo add_method;
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MethodInfo remove_method;
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public ReflectionEventDescriptor (EventInfo eventInfo) : base (eventInfo.Name, (Attribute[]) eventInfo.GetCustomAttributes (true))
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{
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_eventInfo = eventInfo;
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_componentType = eventInfo.DeclaringType;
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_eventType = eventInfo.EventHandlerType;
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add_method = eventInfo.GetAddMethod ();
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remove_method = eventInfo.GetRemoveMethod ();
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}
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public ReflectionEventDescriptor (Type componentType, EventDescriptor oldEventDescriptor, Attribute[] attrs) : base (oldEventDescriptor, attrs)
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{
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_componentType = componentType;
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_eventType = oldEventDescriptor.EventType;
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EventInfo event_info = componentType.GetEvent (oldEventDescriptor.Name);
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add_method = event_info.GetAddMethod ();
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remove_method = event_info.GetRemoveMethod ();
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}
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public ReflectionEventDescriptor (Type componentType, string name, Type type, Attribute[] attrs) : base (name, attrs)
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{
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_componentType = componentType;
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_eventType = type;
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EventInfo event_info = componentType.GetEvent (name);
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add_method = event_info.GetAddMethod ();
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remove_method = event_info.GetRemoveMethod ();
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}
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EventInfo GetEventInfo ()
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{
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if (_eventInfo == null) {
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_eventInfo = _componentType.GetEvent (Name);
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if (_eventInfo == null)
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throw new ArgumentException ("Accessor methods for the " + Name + " event are missing");
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}
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return _eventInfo;
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}
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public override void AddEventHandler (object component, System.Delegate value)
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{
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add_method.Invoke (component, new object [] { value });
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}
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public override void RemoveEventHandler (object component, System.Delegate value)
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{
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remove_method.Invoke (component, new object [] { value });
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}
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public override System.Type ComponentType
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{
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get { return _componentType; }
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}
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public override System.Type EventType
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{
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get { return _eventType; }
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}
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public override bool IsMulticast
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{
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get { return GetEventInfo().IsMulticast; }
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}
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}
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}
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