korganizer

history.h

00001 /*
00002     This file is part of KOrganizer.
00003 
00004     Copyright (c) 2003 Cornelius Schumacher <schumacher@kde.org>
00005 
00006     This program is free software; you can redistribute it and/or modify
00007     it under the terms of the GNU General Public License as published by
00008     the Free Software Foundation; either version 2 of the License, or
00009     (at your option) any later version.
00010 
00011     This program is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00014     GNU General Public License for more details.
00015 
00016     You should have received a copy of the GNU General Public License
00017     along with this program; if not, write to the Free Software
00018     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00019 
00020     As a special exception, permission is given to link this program
00021     with any edition of Qt, and distribute the resulting executable,
00022     without including the source code for Qt in the source distribution.
00023 */
00024 #ifndef KORG_HISTORY_H
00025 #define KORG_HISTORY_H
00026 
00027 #include <qobject.h>
00028 #include <qptrlist.h>
00029 
00030 namespace KCal {
00031 
00032 class Calendar;
00033 class Incidence;
00034 
00035 }
00036 
00037 namespace KOrg {
00038 
00039 class History : public QObject
00040 {
00041     Q_OBJECT
00042   public:
00043     History( KCal::Calendar * );
00044 
00045     void recordDelete( KCal::Incidence * );
00046     void recordAdd( KCal::Incidence * );
00047     void recordEdit( KCal::Incidence *oldIncidence,
00048                      KCal::Incidence *newIncidence );
00049     void startMultiModify( const QString &description );
00050     void endMultiModify();
00051 
00052   public slots:
00053     void undo();
00054     void redo();
00055 
00056   signals:
00057     void undone();
00058     void redone();
00059 
00060     void undoAvailable( const QString & );
00061     void redoAvailable( const QString & );
00062 
00063   protected:
00064     void truncate();
00065 
00066   private:
00067   
00068     class Entry
00069     {
00070       public:
00071         Entry( KCal::Calendar * );
00072         virtual ~Entry();
00073     
00074         virtual void undo() = 0;
00075         virtual void redo() = 0;
00076 
00077         virtual QString text() = 0;
00078 
00079       protected:
00080         KCal::Calendar *mCalendar;
00081     };
00082 
00083     class EntryDelete : public Entry
00084     {
00085       public:
00086         EntryDelete( KCal::Calendar *, KCal::Incidence * );
00087         ~EntryDelete();
00088         
00089         void undo();
00090         void redo();
00091     
00092         QString text();
00093     
00094       private:
00095         KCal::Incidence *mIncidence;
00096     };
00097 
00098     class EntryAdd : public Entry
00099     {
00100       public:
00101         EntryAdd( KCal::Calendar *, KCal::Incidence * );
00102         ~EntryAdd();
00103         
00104         void undo();
00105         void redo();
00106 
00107         QString text();
00108 
00109       private:
00110         KCal::Incidence *mIncidence;
00111     };
00112     
00113     class EntryEdit : public Entry
00114     {
00115       public:
00116         EntryEdit( KCal::Calendar *calendar, KCal::Incidence *oldIncidence,
00117                    KCal::Incidence *newIncidence );
00118         ~EntryEdit();
00119         
00120         void undo();
00121         void redo();
00122       
00123         QString text();
00124       
00125       private:
00126         KCal::Incidence *mOldIncidence;
00127         KCal::Incidence *mNewIncidence;
00128     };
00129 
00130     class MultiEntry : public Entry
00131     {
00132       public:
00133         MultiEntry( KCal::Calendar *calendar, const QString &text );
00134         ~MultiEntry();
00135         
00136         void appendEntry( Entry* entry );
00137         void undo();
00138         void redo();
00139       
00140         QString text();
00141       
00142       private:
00143         QPtrList<Entry> mEntries;
00144         QString mText;
00145     };
00146 
00147     KCal::Calendar *mCalendar;
00148     MultiEntry *mCurrentMultiEntry;
00149 
00150     QPtrList<Entry> mEntries;
00151     QPtrListIterator<Entry> mUndoEntry;
00152     QPtrListIterator<Entry> mRedoEntry;
00153 };
00154 
00155 }
00156 #endif
KDE Home | KDE Accessibility Home | Description of Access Keys