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<h1>FXDelegator.h</h1><div class="fragment"><pre>00001 <span class="comment">/********************************************************************************</span>
00002 <span class="comment">* *</span>
00003 <span class="comment">* D e l e g a t o r T a r g e t *</span>
00004 <span class="comment">* *</span>
00005 <span class="comment">*********************************************************************************</span>
00006 <span class="comment">* Copyright (C) 2000,2004 by Jeroen van der Zijp. All Rights Reserved. *</span>
00007 <span class="comment">*********************************************************************************</span>
00008 <span class="comment">* This library is free software; you can redistribute it and/or *</span>
00009 <span class="comment">* modify it under the terms of the GNU Lesser General Public *</span>
00010 <span class="comment">* License as published by the Free Software Foundation; either *</span>
00011 <span class="comment">* version 2.1 of the License, or (at your option) any later version. *</span>
00012 <span class="comment">* *</span>
00013 <span class="comment">* This library is distributed in the hope that it will be useful, *</span>
00014 <span class="comment">* but WITHOUT ANY WARRANTY; without even the implied warranty of *</span>
00015 <span class="comment">* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *</span>
00016 <span class="comment">* Lesser General Public License for more details. *</span>
00017 <span class="comment">* *</span>
00018 <span class="comment">* You should have received a copy of the GNU Lesser General Public *</span>
00019 <span class="comment">* License along with this library; if not, write to the Free Software *</span>
00020 <span class="comment">* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *</span>
00021 <span class="comment">*********************************************************************************</span>
00022 <span class="comment">* $Id: FXDelegator.h,v 1.12 2004/02/08 17:17:33 fox Exp $ *</span>
00023 <span class="comment">********************************************************************************/</span>
00024 <span class="preprocessor">#ifndef FXDELEGATOR_H</span>
00025 <span class="preprocessor"></span><span class="preprocessor">#define FXDELEGATOR_H</span>
00026 <span class="preprocessor"></span>
00027 <span class="preprocessor">#ifndef FXOBJECT_H</span>
00028 <span class="preprocessor"></span><span class="preprocessor">#include "FXObject.h"</span>
00029 <span class="preprocessor">#endif</span>
00030 <span class="preprocessor"></span>
00031 <span class="keyword">namespace </span>FX {
00032
00033 <span class="comment"></span>
00034 <span class="comment">/**</span>
00035 <span class="comment">* A delegator forwards messages to a delegate object.</span>
00036 <span class="comment">* Delegators are used when you need to multiplex messages</span>
00037 <span class="comment">* toward any number of target objects.</span>
00038 <span class="comment">* For example, many controls may be connected to FXDelegator,</span>
00039 <span class="comment">* instead of directly to the document object. Changing the</span>
00040 <span class="comment">* delegate in FXDelegator will then reconnect the controls with their</span>
00041 <span class="comment">* new target.</span>
00042 <span class="comment">*/</span>
<a name="l00043"></a><a class="code" href="classFX_1_1FXDelegator.html">00043</a> <span class="keyword">class </span>FXAPI FXDelegator : <span class="keyword">public</span> <a class="code" href="classFX_1_1FXObject.html">FXObject</a> {
00044 FXDECLARE(FXDelegator)
00045 <span class="keyword">protected</span>:
00046 <a class="code" href="classFX_1_1FXObject.html">FXObject</a> *delegate;
00047 <span class="keyword">private</span>:
00048 FXDelegator(<span class="keyword">const</span> FXDelegator&);
00049 FXDelegator &operator=(<span class="keyword">const</span> FXDelegator&);
<a name="l00050"></a><a class="code" href="classFX_1_1FXDelegator.html#a1">00050</a> <span class="keyword">public</span>:
00051 <span class="keyword">virtual</span> <span class="keywordtype">long</span> onDefault(<a class="code" href="classFX_1_1FXObject.html">FXObject</a>*,FXSelector,<span class="keywordtype">void</span>*);
00052 <span class="keyword">public</span>:
<a name="l00053"></a><a class="code" href="classFX_1_1FXDelegator.html#a2">00053</a> <span class="comment"></span>
00054 <span class="comment"> /// Construct a delegator</span>
00055 <span class="comment"></span> FXDelegator(<a class="code" href="classFX_1_1FXObject.html">FXObject</a>* target=NULL):delegate(target){ }
<a name="l00056"></a><a class="code" href="classFX_1_1FXDelegator.html#a3">00056</a> <span class="comment"></span>
00057 <span class="comment"> /// Return delegate object</span>
00058 <span class="comment"></span> <a class="code" href="classFX_1_1FXObject.html">FXObject</a>* getDelegate()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> delegate; }
<a name="l00059"></a><a class="code" href="classFX_1_1FXDelegator.html#a4">00059</a> <span class="comment"></span>
00060 <span class="comment"> /// Change delegate object</span>
00061 <span class="comment"></span> <span class="keywordtype">void</span> setDelegate(<a class="code" href="classFX_1_1FXObject.html">FXObject</a>* target){ delegate=target; }
00062 <span class="comment"></span>
00063 <span class="comment"> /// Always trash during detroy</span>
00064 <span class="comment"></span> <span class="keyword">virtual</span> ~FXDelegator(){ delegate=(FXObject*)-1; }
00065 };
00066
00067 }
00068
00069 <span class="preprocessor">#endif</span>
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