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+/*
+ This file is part of KOrganizer.
+
+ Copyright (c) 2003 Cornelius Schumacher <schumacher@kde.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ As a special exception, permission is given to link this program
+ with any edition of Qt, and distribute the resulting executable,
+ without including the source code for Qt in the source distribution.
+*/
+#ifndef KORG_HISTORY_H
+#define KORG_HISTORY_H
+
+#include <qobject.h>
+#include <qptrlist.h>
+
+namespace KCal {
+
+class Calendar;
+class Incidence;
+
+}
+
+namespace KOrg {
+
+class History : public QObject
+{
+ Q_OBJECT
+ public:
+ History( KCal::Calendar * );
+
+ void recordDelete( KCal::Incidence * );
+ void recordAdd( KCal::Incidence * );
+ void recordEdit( KCal::Incidence *oldIncidence,
+ KCal::Incidence *newIncidence );
+ void startMultiModify( const QString &description );
+ void endMultiModify();
+
+ public slots:
+ void undo();
+ void redo();
+
+ signals:
+ void undone();
+ void redone();
+
+ void undoAvailable( const QString & );
+ void redoAvailable( const QString & );
+
+ protected:
+ void truncate();
+
+ private:
+
+ class Entry
+ {
+ public:
+ Entry( KCal::Calendar * );
+ virtual ~Entry();
+
+ virtual void undo() = 0;
+ virtual void redo() = 0;
+
+ virtual QString text() = 0;
+
+ protected:
+ KCal::Calendar *mCalendar;
+ };
+
+ class EntryDelete : public Entry
+ {
+ public:
+ EntryDelete( KCal::Calendar *, KCal::Incidence * );
+ ~EntryDelete();
+
+ void undo();
+ void redo();
+
+ QString text();
+
+ private:
+ KCal::Incidence *mIncidence;
+ };
+
+ class EntryAdd : public Entry
+ {
+ public:
+ EntryAdd( KCal::Calendar *, KCal::Incidence * );
+ ~EntryAdd();
+
+ void undo();
+ void redo();
+
+ QString text();
+
+ private:
+ KCal::Incidence *mIncidence;
+ };
+
+ class EntryEdit : public Entry
+ {
+ public:
+ EntryEdit( KCal::Calendar *calendar, KCal::Incidence *oldIncidence,
+ KCal::Incidence *newIncidence );
+ ~EntryEdit();
+
+ void undo();
+ void redo();
+
+ QString text();
+
+ private:
+ KCal::Incidence *mOldIncidence;
+ KCal::Incidence *mNewIncidence;
+ };
+
+ class MultiEntry : public Entry
+ {
+ public:
+ MultiEntry( KCal::Calendar *calendar, const QString &text );
+ ~MultiEntry();
+
+ void appendEntry( Entry* entry );
+ void undo();
+ void redo();
+
+ QString text();
+
+ private:
+ QPtrList<Entry> mEntries;
+ QString mText;
+ };
+
+ KCal::Calendar *mCalendar;
+ MultiEntry *mCurrentMultiEntry;
+
+ QPtrList<Entry> mEntries;
+ QPtrListIterator<Entry> mUndoEntry;
+ QPtrListIterator<Entry> mRedoEntry;
+};
+
+}
+#endif