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00001 /******************************************************************************** 00002 * * 00003 * D e l e g a t o r T a r g e t * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 2000,2009 by Jeroen van der Zijp. All Rights Reserved. * 00007 ********************************************************************************* 00008 * This library is free software; you can redistribute it and/or modify * 00009 * it under the terms of the GNU Lesser General Public License as published by * 00010 * the Free Software Foundation; either version 3 of the License, or * 00011 * (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00016 * GNU Lesser General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Lesser General Public License * 00019 * along with this program. If not, see <http://www.gnu.org/licenses/> * 00020 ********************************************************************************* 00021 * $Id: FXDelegator.h,v 1.19 2009/01/06 13:07:22 fox Exp $ * 00022 ********************************************************************************/ 00023 #ifndef FXDELEGATOR_H 00024 #define FXDELEGATOR_H 00025 00026 #ifndef FXOBJECT_H 00027 #include "FXObject.h" 00028 #endif 00029 00030 namespace FX { 00031 00032 00033 /** 00034 * A delegator forwards messages to a delegate object. 00035 * Delegators are used when you need to multiplex messages 00036 * toward any number of target objects. 00037 * For example, many controls may be connected to FXDelegator, 00038 * instead of directly to the document object. Changing the 00039 * delegate in FXDelegator will then reconnect the controls with their 00040 * new target. 00041 */ 00042 class FXAPI FXDelegator : public FXObject { 00043 FXDECLARE(FXDelegator) 00044 protected: 00045 FXObject *delegate; 00046 private: 00047 FXDelegator(const FXDelegator&); 00048 FXDelegator &operator=(const FXDelegator&); 00049 public: 00050 virtual long onDefault(FXObject*,FXSelector,void*); 00051 public: 00052 00053 /// Construct a delegator 00054 FXDelegator(FXObject* target=NULL):delegate(target){ } 00055 00056 /// Return delegate object 00057 FXObject* getDelegate() const { return delegate; } 00058 00059 /// Change delegate object 00060 void setDelegate(FXObject* target){ delegate=target; } 00061 00062 /// Always trash during detroy 00063 virtual ~FXDelegator(){ delegate=(FXObject*)-1L; } 00064 }; 00065 00066 } 00067 00068 #endif
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