vtransformnodes.cpp

/* 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 "vpath.h"
#include "vsegment.h"
#include "vtransformnodes.h"
 
 
VTransformNodes::VTransformNodes( const TQWMatrix& m )
    : m_matrix( m )
{
}
 
void
VTransformNodes::visitVSubpath( VSubpath& path )
{
    path.first();
    while( path.current() )
    {
        if( path.current()->isCurve() )
        {
            if( !path.current()->knotIsSelected() &&
                path.current()->pointIsSelected( 1 ) &&
                path.current()->next() &&
                path.current()->next()->isCurve() &&
                !path.current()->next()->pointIsSelected( 0 ) &&
                path.current()->isSmooth() )
            {
                // Do extra reverse trafo for smooth beziers
                TQWMatrix m2( m_matrix.m11(), m_matrix.m12(), m_matrix.m21(), m_matrix.m22(),
                            -m_matrix.dx(), -m_matrix.dy() );
                path.current()->next()->setPoint( 0, path.current()->next()->point( 0 ).transform( m2 ) );
            }
            if( path.current()->pointIsSelected( 0 ) &&
                path.current()->prev() &&
                path.current()->prev()->isCurve() &&
                !path.current()->prev()->knotIsSelected() &&
                !path.current()->prev()->pointIsSelected( 1 ) &&
                path.current()->prev()->isSmooth() )
            {
                // Do extra reverse trafo for smooth beziers
                TQWMatrix m2( m_matrix.m11(), m_matrix.m12(), m_matrix.m21(), m_matrix.m22(),
                            -m_matrix.dx(), -m_matrix.dy() );
                path.current()->prev()->setPoint( 1, path.current()->prev()->point( 1 ).transform( m2 ) );
            }
        }
 
        for( uint i = 0; i < path.current()->degree(); ++i )
        {
            if( path.current()->pointIsSelected( i ) )
                path.current()->setPoint( i, path.current()->point( i ).transform( m_matrix ) );
        }
 
        if( !success() )
            setSuccess();
        path.next();
    }
}