142 lines
3 KiB
C++
142 lines
3 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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void release(){
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delete this;
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}
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const Copyable& get() const {
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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 Callback<void (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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MapFile* map(){
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return m_map;
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}
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void instanceAttach( MapFile* map ){
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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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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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if ( m_map != 0 ) {
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m_map->changed();
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}
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if ( m_undoQueue != 0 ) {
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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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return new BasicUndoMemento<Copyable>( m_object );
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}
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void importState( const UndoMemento* state ){
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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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}
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~UndoableObject(){
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}
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void instanceAttach( MapFile* map ){
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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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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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if ( m_map != 0 ) {
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m_map->changed();
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}
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if ( m_undoQueue != 0 ) {
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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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return new BasicUndoMemento<Copyable>( m_object );
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}
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void importState( const UndoMemento* state ){
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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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