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/* This file is part of the KDE project
Copyright (C) 2002, The Karbon Developers
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "vreplacingcmd.h"
#include "vselection.h"
#include "vdocument.h"
VReplacingCmd::VReplacingCmd( VDocument* doc, const QString& name )
: VCommand( doc, name )
{
// Set members.
m_oldObjects = doc ? document()->selection()->clone() : 0L;
m_newObjects = 0L;
}
VReplacingCmd::~VReplacingCmd()
{
delete( m_oldObjects );
delete( m_newObjects );
}
void
VReplacingCmd::execute()
{
// Did we have at least once a success? Otherwise we don't get inserted
// into the command history.
bool successful = false;
// Create new shapes if they don't exist yet.
if( !m_newObjects )
{
m_newObjects = new VSelection();
// Pointer to temporary object.
VObject* newObject;
VObjectListIterator itr( m_oldObjects->objects() );
VObjectList rejects;
for( ; itr.current(); ++itr )
{
// Clone object and visit the clone.
newObject = itr.current()->clone();
// Success.
if( visit( *newObject ) )
{
successful = true;
// Insert new shape right before old shape.
itr.current()->parent()->insertInfrontOf(
newObject, itr.current() );
// Add new shape to list of new objects.
m_newObjects->append( newObject );
}
// No success.
else
{
rejects.append( itr.current() );
// Delete temporary object.
delete( newObject );
}
}
VObjectListIterator jtr( rejects );
for( ; jtr.current(); ++jtr )
{
// Don't consider this object in the future anymore.
m_oldObjects->take( *jtr.current() );
}
}
// Nothing to do.
if( m_newObjects->objects().count() == 0 )
return;
VObjectListIterator itr( m_oldObjects->objects() );
// Hide old objects.
for( ; itr.current(); ++itr )
{
document()->selection()->take( *itr.current() );
itr.current()->setState( VObject::deleted );
}
// Show new objects.
for( itr = m_newObjects->objects(); itr.current(); ++itr )
{
itr.current()->setState( VObject::normal );
document()->selection()->append( itr.current() );
}
// Tell command history wether we had success at least once.
setSuccess( successful );
}
void
VReplacingCmd::unexecute()
{
// Nothing to do.
if( m_newObjects->objects().count() == 0 )
return;
VObjectListIterator itr( m_oldObjects->objects() );
// Show old objects.
for( ; itr.current(); ++itr )
{
itr.current()->setState( VObject::normal );
document()->selection()->append( itr.current() );
}
// Hide new objects.
for( itr = m_newObjects->objects(); itr.current(); ++itr )
{
document()->selection()->take( *itr.current() );
itr.current()->setState( VObject::deleted );
}
// Reset success for command history.
setSuccess( false );
}
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