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Viewing changes to external/xwt/Xwt/Xwt/XwtComponent.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/xwt/Xwt/Xwt/XwtComponent.cs
 
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// 
 
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// XwtComponent.cs
 
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//  
 
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// Author:
 
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//       Lluis Sanchez <lluis@xamarin.com>
 
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// 
 
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// Copyright (c) 2011 Xamarin Inc
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in
 
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// 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, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System;
 
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using System.ComponentModel;
 
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using Xwt.Engine;
 
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using System.Collections.Generic;
 
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using System.Reflection;
 
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using Xwt.Backends;
 
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namespace Xwt
 
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{
 
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        public abstract class XwtComponent: Component, IFrontend
 
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        {
 
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                BackendHost backendHost;
 
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                public XwtComponent ()
 
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                {
 
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                        backendHost = CreateBackendHost ();
 
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                        backendHost.Parent = this;
 
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                }
 
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                protected virtual BackendHost CreateBackendHost ()
 
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                {
 
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                        return new BackendHost ();
 
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                }
 
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                protected BackendHost BackendHost {
 
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                        get { return backendHost; }
 
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                }
 
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                object IFrontend.Backend {
 
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                        get { return backendHost.Backend; }
 
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                }
 
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                protected static void MapEvent (object eventId, Type type, string methodName)
 
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                {
 
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                        EventUtil.MapEvent (eventId, type, methodName);
 
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                }
 
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        }
 
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        class EventUtil
 
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        {
 
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                static Dictionary<Type, List<EventMap>> overridenEventMap = new Dictionary<Type, List<EventMap>> ();
 
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                static Dictionary<Type, HashSet<object>> overridenEvents = new Dictionary<Type, HashSet<object>> ();
 
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                public static void MapEvent (object eventId, Type type, string methodName)
 
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                {
 
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                        List<EventMap> events;
 
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                        if (!overridenEventMap.TryGetValue (type, out events)) {
 
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                                events = new List<EventMap> ();
 
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                                overridenEventMap [type] = events;
 
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                        }
 
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                        EventMap emap = new EventMap () {
 
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                                MethodName = methodName,
 
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                                EventId = eventId
 
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                        };
 
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                        events.Add (emap);
 
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                }
 
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                public static HashSet<object> GetDefaultEnabledEvents (Type type)
 
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                {
 
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                        HashSet<object> defaultEnabledEvents;
 
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                        if (!overridenEvents.TryGetValue (type, out defaultEnabledEvents)) {
 
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                                defaultEnabledEvents = new HashSet<object> ();
 
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                                Type t = type;
 
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                                while (t != typeof(Component)) {
 
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                                        List<EventMap> emaps;
 
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                                        if (overridenEventMap.TryGetValue (t, out emaps)) {
 
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                                                foreach (var emap in emaps) {
 
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                                                        if (IsOverriden (emap, type, t))
 
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                                                                defaultEnabledEvents.Add (emap.EventId);
 
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                                                }
 
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                                        }
 
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                                        t = t.BaseType;
 
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                                }
 
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                                overridenEvents [type] = defaultEnabledEvents;
 
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                        }
 
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                        return defaultEnabledEvents;
 
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                }
 
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                static bool IsOverriden (EventMap emap, Type thisType, Type t)
 
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                {
 
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                        var method = thisType.GetMethod (emap.MethodName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
 
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                        return method.DeclaringType != t;
 
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                }
 
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        }
 
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}
 
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