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