mirror of https://github.com/TTimo/GtkRadiant.git
162 lines
3.2 KiB
C++
162 lines
3.2 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined (INCLUDED_UNDOLIB_H)
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#define INCLUDED_UNDOLIB_H
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#include "iundo.h"
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#include "mapfile.h"
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#include "warnings.h"
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#include "generic/callback.h"
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template<typename Copyable>
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class BasicUndoMemento : public UndoMemento
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{
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Copyable m_data;
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public:
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BasicUndoMemento(const Copyable& data)
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: m_data(data)
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{
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}
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void release()
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{
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delete this;
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}
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const Copyable& get() const
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{
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return m_data;
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}
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};
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template<typename Copyable>
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class ObservedUndoableObject : public Undoable
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{
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typedef Callback1<const Copyable&> ImportCallback;
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Copyable& m_object;
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ImportCallback m_importCallback;
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UndoObserver* m_undoQueue;
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MapFile* m_map;
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public:
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ObservedUndoableObject<Copyable>(Copyable& object, const ImportCallback& importCallback)
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: m_object(object), m_importCallback(importCallback), m_undoQueue(0), m_map(0)
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{
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}
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~ObservedUndoableObject()
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{
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}
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MapFile* map()
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{
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return m_map;
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}
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void instanceAttach(MapFile* map)
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{
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m_map = map;
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m_undoQueue = GlobalUndoSystem().observer(this);
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}
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void instanceDetach(MapFile* map)
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{
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m_map = 0;
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m_undoQueue = 0;
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GlobalUndoSystem().release(this);
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}
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void save()
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{
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if(m_map != 0)
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{
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m_map->changed();
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}
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if(m_undoQueue != 0)
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{
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m_undoQueue->save(this);
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}
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}
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UndoMemento* exportState() const
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{
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return new BasicUndoMemento<Copyable>(m_object);
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}
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void importState(const UndoMemento* state)
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{
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save();
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m_importCallback((static_cast<const BasicUndoMemento<Copyable>*>(state))->get());
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}
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};
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template<typename Copyable>
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class UndoableObject : public Undoable
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{
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Copyable& m_object;
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UndoObserver* m_undoQueue;
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MapFile* m_map;
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public:
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UndoableObject(Copyable& object)
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: m_object(object), m_undoQueue(0), m_map(0)
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{}
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~UndoableObject()
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{
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}
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void instanceAttach(MapFile* map)
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{
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m_map = map;
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m_undoQueue = GlobalUndoSystem().observer(this);
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}
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void instanceDetach(MapFile* map)
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{
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m_map = 0;
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m_undoQueue = 0;
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GlobalUndoSystem().release(this);
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}
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void save()
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{
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if(m_map != 0)
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{
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m_map->changed();
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}
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if(m_undoQueue != 0)
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{
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m_undoQueue->save(this);
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}
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}
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UndoMemento* exportState() const
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{
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return new BasicUndoMemento<Copyable>(m_object);
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}
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void importState(const UndoMemento* state)
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{
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save();
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m_object = (static_cast<const BasicUndoMemento<Copyable>*>(state))->get();
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}
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};
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#endif
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