00001 /* 00002 * Copyright (c) 2003-2005, Bram Stein 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 00009 * 1. Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * 2. Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * 3. The name of the author may not be used to endorse or promote products 00015 * derived from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED 00018 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00019 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 00020 * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 00021 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00022 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00023 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 00024 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00025 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 00026 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 */ 00028 #pragma once 00029 #ifndef OBSERVABLE_H 00030 #define OBSERVABLE_H 00031 00032 #include "..\Pointers.h" 00033 00034 namespace ui 00035 { 00036 namespace util 00037 { 00046 class Observable 00047 { 00048 public: 00054 void addObserver(Observer* observer); 00055 00061 void removeObserver(Observer* observer); 00062 00066 void removeObservers(); 00067 00075 void notifyObserver(); 00076 00080 virtual ~Observable(); 00081 protected: 00087 void setChanged(); 00088 00092 bool hasChanged() const; 00093 00097 void clearChanged(); 00098 00102 Observable(); 00103 private: 00104 bool isChanged; 00105 ObserverList observerList; 00106 }; 00107 } 00108 } 00109 00110 #endif