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100 lines
2.8 KiB
100 lines
2.8 KiB
15 years ago
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/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2000-2001 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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* This program 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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* *
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**************************************************************************/
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#include "pmcommandmanager.h"
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#include "pmpart.h"
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PMCommandManager::PMCommandManager( PMPart* thePart )
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{
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m_commands.setAutoDelete( true );
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m_redoCommands.setAutoDelete( true );
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m_maxUndoRedo = 50;
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m_pPart = thePart;
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}
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PMCommandManager::~PMCommandManager( )
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{
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m_commands.clear( );
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m_redoCommands.clear( );
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}
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void PMCommandManager::execute( PMCommand* cmd )
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{
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// some commands (like control point commands) can be executed
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// multiple times.
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cmd->execute( this );
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if( m_commands.last( ) != cmd )
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m_commands.append( cmd );
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while( m_commands.count( ) > m_maxUndoRedo )
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m_commands.removeFirst( );
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m_redoCommands.clear( );
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emit updateUndoRedo( cmd->text( ), QString::null );
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}
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void PMCommandManager::undo( )
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{
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if( !m_commands.isEmpty( ) )
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{
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PMCommand* last = m_commands.last( );
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last->undo( this );
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m_redoCommands.append( m_commands.take( ) );
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if( m_commands.isEmpty( ) )
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emit updateUndoRedo( QString::null, last->text( ) );
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else
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emit updateUndoRedo( m_commands.last( )->text( ), last->text( ) );
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}
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}
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void PMCommandManager::redo( )
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{
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if( !m_redoCommands.isEmpty( ) )
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{
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PMCommand* last = m_redoCommands.last( );
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last->execute( this );
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m_commands.append( m_redoCommands.take( ) );
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if( m_redoCommands.isEmpty( ) )
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emit updateUndoRedo( last->text( ), QString::null );
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else
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emit updateUndoRedo( last->text( ), m_redoCommands.last( )->text( ) );
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}
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}
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void PMCommandManager::clear( )
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{
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m_redoCommands.clear( );
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m_commands.clear( );
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emit updateUndoRedo( QString::null, QString::null );
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}
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void PMCommandManager::cmdObjectChanged( PMObject* obj, const int mode )
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{
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emit objectChanged( obj, mode, this );
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}
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void PMCommandManager::cmdIDChanged( PMObject* obj, const QString& oldID )
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{
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emit idChanged( obj, oldID );
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}
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#include "pmcommandmanager.moc"
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