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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1073 0778d3d1-df1d-0410-868b-ea421aaaa00d
109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
/*
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* project_journal.h - declaration of class projectJournal
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*
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* Copyright (c) 2006-2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program 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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _PROJECT_JOURNAL_H
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#define _PROJECT_JOURNAL_H
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#include <QtCore/QHash>
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#include <QtCore/QVariant>
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#include <QtCore/QVector>
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#include "types.h"
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class journallingObject;
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class projectJournal
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{
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public:
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projectJournal( void );
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virtual ~projectJournal();
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void undo( void );
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void redo( void );
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// tell history that a new journal entry was added to object with ID _id
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void journalEntryAdded( const jo_id_t _id );
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bool isJournalling( void ) const
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{
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return( m_journalling );
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}
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void setJournalling( const bool _on )
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{
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m_journalling = _on;
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}
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// alloc new ID and register object _obj to it
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jo_id_t allocID( journallingObject * _obj );
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// if there's already something known about ID _id, but it is currently
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// unused (e.g. after jouralling object was deleted), register object
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// _obj to this id
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void reallocID( const jo_id_t _id, journallingObject * _obj );
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// make ID _id unused, but keep all global journalling information
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// (order of journalling entries etc.) referring to _id - needed for
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// restoring a journalling object later
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void freeID( const jo_id_t _id )
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{
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reallocID( _id, NULL );
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}
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// completely remove everything linked with ID _id - all global
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// journalling information about the ID get's lost
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void forgetAboutID( const jo_id_t _id );
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void clearJournal( void );
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journallingObject * getJournallingObject( const jo_id_t _id )
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{
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if( m_joIDs.contains( _id ) )
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{
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return( m_joIDs[_id] );
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}
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return( NULL );
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}
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private:
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typedef QHash<jo_id_t, journallingObject *> joIDMap;
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typedef QVector<jo_id_t> journalEntryVector;
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joIDMap m_joIDs;
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journalEntryVector m_journalEntries;
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journalEntryVector::iterator m_currentJournalEntry;
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bool m_journalling;
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} ;
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#endif
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