From 460c52653ab0dcca6f19a4f492ed2c5e4e963ab0 Mon Sep 17 00:00:00 2001 From: toma Date: Wed, 25 Nov 2009 17:56:58 +0000 Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features. BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da --- kalarm/undo.h | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 kalarm/undo.h (limited to 'kalarm/undo.h') diff --git a/kalarm/undo.h b/kalarm/undo.h new file mode 100644 index 000000000..99e06f979 --- /dev/null +++ b/kalarm/undo.h @@ -0,0 +1,93 @@ +/* + * undo.h - undo/redo facility + * Program: kalarm + * Copyright (C) 2005 by David Jarvie + * + * 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. + */ + +#ifndef UNDO_H +#define UNDO_H + +/** @file undo.h - undo/redo facility */ + +#include +#include + +class KAEvent; +class UndoItem; + + +class Undo : public QObject +{ + Q_OBJECT + public: + enum Type { NONE, UNDO, REDO }; + + static Undo* instance(); + static void saveAdd(const KAEvent&); + static void saveEdit(const KAEvent& oldEvent, const KAEvent& newEvent); + static void saveDelete(const KAEvent&); + static void saveDeletes(const QValueList&); + static void saveReactivate(const KAEvent&); + static void saveReactivates(const QValueList&); + static bool undo(QWidget* parent, const QString& action) + { return undo(mUndoList.begin(), UNDO, parent, action); } + static bool undo(int id, QWidget* parent, const QString& action) + { return undo(findItem(id, UNDO), UNDO, parent, action); } + static bool redo(QWidget* parent, const QString& action) + { return undo(mRedoList.begin(), REDO, parent, action); } + static bool redo(int id, QWidget* parent, const QString& action) + { return undo(findItem(id, REDO), REDO, parent, action); } + static void clear(); + static bool haveUndo() { return !mUndoList.isEmpty(); } + static bool haveRedo() { return !mRedoList.isEmpty(); } + static QString actionText(Type); + static QString actionText(Type, int id); + static QString description(Type, int id); + static QValueList ids(Type); + static void emitChanged(); + + // Types for use by UndoItem class and its descendants + typedef QValueList List; + + signals: + void changed(const QString& undo, const QString& redo); + + protected: + // Methods for use by UndoItem class + static void add(UndoItem*, bool undo); + static void remove(UndoItem*, bool undo); + static void replace(UndoItem* old, UndoItem* New); + + private: + typedef QValueList::Iterator Iterator; + + Undo(QObject* parent) : QObject(parent) { } + static void removeRedos(const QString& eventID); + static bool undo(Iterator, Type, QWidget* parent, const QString& action); + static UndoItem* getItem(int id, Type); + static Iterator findItem(int id, Type); + void emitChanged(const QString& undo, const QString& redo) + { emit changed(undo, redo); } + + static Undo* mInstance; // the one and only Undo instance + static List mUndoList; // edit history for undo, latest undo first + static List mRedoList; // edit history for redo, latest redo first + + friend class UndoItem; +}; + +#endif // UNDO_H -- cgit v1.2.1