kaddressbook Library API Documentation

undo.h

00001 /* 00002 This file is part of KAddressBook. 00003 Copyright (C) 1999 Don Sanders <sanders@kde.org> 00004 00005 This program is free software; you can redistribute it and/or modify 00006 it under the terms of the GNU General Public License as published by 00007 the Free Software Foundation; either version 2 of the License, or 00008 (at your option) any later version. 00009 00010 This program is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 GNU General Public License for more details. 00014 00015 You should have received a copy of the GNU General Public License 00016 along with this program; if not, write to the Free Software 00017 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00018 00019 As a special exception, permission is given to link this program 00020 with any edition of Qt, and distribute the resulting executable, 00021 without including the source code for Qt in the source distribution. 00022 */ 00023 00024 #ifndef UNDO_H 00025 #define UNDO_H 00026 00027 #include <qobject.h> 00028 #include <qptrstack.h> 00029 #include <qstring.h> 00030 00031 #include <kabc/addressbook.h> 00032 00033 #include "kablock.h" 00034 00035 class Command 00036 { 00037 public: 00038 Command( KABC::AddressBook *addressBook ) { mAddressBook = addressBook; } 00039 virtual ~Command() {}; 00040 00041 virtual QString name() = 0; 00042 virtual bool redo() = 0; 00043 virtual bool undo() = 0; 00044 00045 protected: 00046 KABC::AddressBook *addressBook() const { return mAddressBook; } 00047 KABLock *lock() const { return KABLock::self( mAddressBook ); } 00048 00049 private: 00050 KABC::AddressBook *mAddressBook; 00051 }; 00052 00061 class StackBase : public QObject 00062 { 00063 Q_OBJECT 00064 00065 public: 00066 StackBase() : QObject() {} 00067 00068 void push( Command *c ); 00069 bool isEmpty(); 00070 Command *top(); 00071 void clear(); 00072 00073 signals: 00074 void changed(); 00075 00076 protected: 00081 Command *pop(); 00082 00083 QPtrStack<Command> mCommandStack; 00084 }; 00085 00086 class UndoStack : public StackBase 00087 { 00088 public: 00089 static UndoStack *instance(); 00090 void undo(); 00091 00092 protected: 00093 UndoStack(); 00094 static UndoStack* instance_; 00095 }; 00096 00097 class RedoStack : public StackBase 00098 { 00099 public: 00100 static RedoStack *instance(); 00101 void redo(); 00102 00103 protected: 00104 RedoStack(); 00105 static RedoStack* instance_; 00106 }; 00107 00108 #endif
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This file is part of the documentation for kaddressbook Library Version 3.3.0.
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