vtransformcmd.cpp

/* This file is doc of the KDE project
   Copyright (C) 2001, 2002, 2003 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 <tdelocale.h>
 
#include "vcomposite.h"
#include "vpath.h"
#include "vsegment.h"
#include "vselection.h"
#include "vtext.h"
#include "vimage.h"
#include "vtransformcmd.h"
#include "vstroke.h"
#include "vfill.h"
#include "vdocument.h"
 
#include <kdebug.h>
 
VTransformCmd::VTransformCmd( VDocument *doc, const TQWMatrix& mat, bool duplicate )
    : VCommand( doc, i18n( "Transform Objects" ) ), m_mat( mat ), m_duplicate( duplicate )
{
    m_selection = ( document() && document()->selection() )
        ? document()->selection()->clone()
        : new VSelection();
 
    if( m_duplicate )
    {
        if( !m_selection || m_selection->objects().count() == 1 )
            setName( i18n( "Duplicate Object" ) );
        else
            setName( i18n( "Duplicate Objects" ) );
    }
    else if( !m_selection || m_selection->objects().count() == 1 )
        setName( i18n( "Transform Object" ) );
}
 
VTransformCmd::VTransformCmd( VDocument *doc, const TQString& name, const TQString& icon, bool duplicate )
        : VCommand( doc, name, icon ), m_duplicate( duplicate )
{
    m_selection = ( document() && document()->selection() )
        ? document()->selection()->clone()
        : new VSelection();
 
    if( m_duplicate )
    {
        if( !m_selection || m_selection->objects().count() == 1 )
            setName( i18n( "Duplicate Object" ) );
        else
            setName( i18n( "Duplicate Objects" ) );
    }
}
 
VTransformCmd::~VTransformCmd()
{
    delete( m_selection );
    m_selection = 0L;
}
 
void
VTransformCmd::execute()
{
    VObjectListIterator itr( m_selection->objects() );
 
    if( m_duplicate )
    {
        // clone original objects, add duplicates to document, transform and select them
        VObject *copy = 0L;
        for( ; itr.current() ; ++itr )
        {
            copy = itr.current()->clone();
            visit( *copy );
            document()->append( copy );
            document()->selection()->take( *itr.current() );
            document()->selection()->append( copy );
            m_duplicates.append( copy );
        }
    }
    else
    {
        // clear selection ...
        document()->selection()->clear();
        // transform objects
        for( ; itr.current() ; ++itr )
        {
            visit( *itr.current() );
        }
        // ... and re-add all objects incase we are re-executing the command
        document()->selection()->append( m_selection->objects() );
    }
 
    setSuccess( true );
}
 
void
VTransformCmd::unexecute()
{
    // inverting the matrix should undo the affine transformation
    m_mat = m_mat.invert();
 
    if( m_duplicate )
    {
        // remove duplicated objects
        VObjectListIterator itr( m_duplicates );
        for( ; itr.current() ; ++itr )
        {
            document()->selection()->take( *itr.current() );
            itr.current()->setState( VObject::deleted );
        }
        VObjectListIterator jtr( m_selection->objects() );
 
        // add original selection objects to new selection
        for( ; jtr.current() ; ++jtr )
        {
            document()->selection()->append( jtr.current() );
        }
    }
    else
    {
        document()->selection()->clear();
        // move objects back to original position
        visit( *m_selection );
        document()->selection()->append( m_selection->objects() );
    }
    // reset
    m_mat = m_mat.invert();
    setSuccess( false );
}
 
void
VTransformCmd::visitVObject( VObject& object )
{
    // Apply transformation to gradients.
    VStroke* stroke = object.stroke();
    if( stroke && stroke->type() == VStroke::grad )
        stroke->gradient().transform( m_mat );
    else if( stroke && stroke->type() == VStroke::patt )
        stroke->pattern().transform( m_mat );
 
    VFill* fill = object.fill();
    if( fill && fill->type() == VFill::grad )
        fill->gradient().transform( m_mat );
    else if( fill && fill->type() == VFill::patt )
        fill->pattern().transform( m_mat );
}
 
void
VTransformCmd::visitVPath( VPath& composite )
{
    if( composite.state() == VObject::hidden ||
        composite.state() == VObject::normal_locked ||
        composite.state() == VObject::hidden_locked )
        return;
 
    visitVObject( composite );
 
    composite.transform( m_mat );
 
    VVisitor::visitVPath( composite );
}
 
void
VTransformCmd::visitVSubpath( VSubpath& path )
{
    if( path.state() == VObject::hidden ||
        path.state() == VObject::normal_locked ||
        path.state() == VObject::hidden_locked )
        return;
 
    VSegment* segment = path.first();
 
    while( segment )
    {
        for( unsigned short i = 0; i < segment->degree(); ++i )
        {
            segment->setPoint( i, segment->point( i ).transform( m_mat ) );
        }
 
        segment = segment->next();
    }
 
    path.invalidateBoundingBox();
}
 
void
VTransformCmd::visitVText( VText& text )
{
    if( text.state() == VObject::hidden ||
        text.state() == VObject::normal_locked ||
        text.state() == VObject::hidden_locked )
        return;
 
    visitVObject( text );
 
    visit( text.basePath() );
 
    VPathListIterator itr( text.glyphs() );
 
    for( ; itr.current() ; ++itr )
    {
        visit( *itr.current() );
    }
 
    text.invalidateBoundingBox();
}
 
void
VTransformCmd::visitVImage( VImage &img )
{
    if( img.state() == VObject::hidden ||
        img.state() == VObject::normal_locked ||
        img.state() == VObject::hidden_locked )
        return;
 
    img.transform( m_mat );
}
 
VTranslateCmd::VTranslateCmd( VDocument *doc, double d1, double d2, bool duplicate )
        : VTransformCmd( doc, i18n( "Translate Objects" ), "translate", duplicate )
{
    if( !duplicate && ( !m_selection || m_selection->objects().count() == 1 ) )
        setName( i18n( "Translate Object" ) );
 
    m_mat.translate( d1, d2 );
}
 
 
VScaleCmd::VScaleCmd( VDocument *doc, const KoPoint& p, double s1, double s2, bool duplicate )
        : VTransformCmd( doc, i18n( "Scale Objects" ), "14_select", duplicate )
{
    if( !duplicate && ( !m_selection || m_selection->objects().count() == 1 ) )
        setName( i18n( "Scale Object" ) );
 
    m_mat.translate( p.x(), p.y() );
    m_mat.scale( s1, s2 );
    m_mat.translate( -p.x(), -p.y() );
}
 
 
VShearCmd::VShearCmd( VDocument *doc, const KoPoint& p, double s1, double s2, bool duplicate )
        : VTransformCmd( doc, i18n( "Shear Objects" ), "14_shear", duplicate )
{
    if( !duplicate && ( !m_selection || m_selection->objects().count() == 1 ) )
        setName( i18n( "Shear Object" ) );
 
    m_mat.translate( p.x(), p.y() );
    m_mat.shear( s1, s2 );
    m_mat.translate( -p.x(), -p.y() );
}
 
VRotateCmd::VRotateCmd( VDocument *doc, const KoPoint& p, double angle, bool duplicate )
        : VTransformCmd( doc, i18n( "Rotate Objects" ), "14_rotate", duplicate )
{
    if( !duplicate && ( !m_selection || m_selection->objects().count() == 1 ) )
        setName( i18n( "Rotate Object" ) );
 
    m_mat.translate( p.x(), p.y() );
    m_mat.rotate( angle );
    m_mat.translate( -p.x(), -p.y() );
}
 
VTranslateBezierCmd::VTranslateBezierCmd( VDocument *doc, VSegment *segment, double d1, double d2, bool firstControl )
    : VCommand( doc, i18n( "Translate Bezier" ) ), m_segment( segment ), m_firstControl( firstControl )
    , m_subpath(0L)
{
    m_mat.translate( d1, d2 );
    m_segmenttwo = 0L;
 
    if( document() && document()->selection() )
    {
        VObjectListIterator itr( document()->selection()->objects() );
 
        // find subpath containing the segment
        for( ; itr.current() ; ++itr )
            visit( *itr.current() );
    }
}
 
VTranslateBezierCmd::~VTranslateBezierCmd()
{
}
 
void
VTranslateBezierCmd::execute()
{
    if( m_segment->degree() == 3 )
    {
        TQWMatrix m2( m_mat.m11(), m_mat.m12(), m_mat.m21(), m_mat.m22(), -m_mat.dx(), -m_mat.dy() );
        if( m_firstControl )
        {
            if( m_segment->prev() &&
                m_segment->prev()->degree() == 3 &&
                m_segment->prev()->isSmooth() )
            {
                m_segmenttwo = m_segment->prev();
                for( uint i = 0;i < m_segmenttwo->degree();i++ )
                {
                    m_segmenttwo->selectPoint( i, i == 1 );
 
                    if( i == 1 )
                        m_segmenttwo->setPoint( i, m_segmenttwo->point( i ).transform( m2 ) );
                }
            }
        }
        else
        {
            m_segmenttwo = ( m_segment->isSmooth() && m_segment->next()->degree() == 3 ) ? m_segment->next() : 0L;
            if( m_segmenttwo )
            {
                for( uint i = 0;i < m_segmenttwo->degree();i++ )
                {
                    m_segmenttwo->selectPoint( i, i == 0 );
 
                    if( i == 0 )
                        m_segmenttwo->setPoint( i, m_segmenttwo->point( i ).transform( m2 ) );
                }
            }
        }
 
        for( uint i = 0;i < m_segment->degree();i++ )
        {
            m_segment->selectPoint( i, i == uint( m_firstControl ? 0 : 1 ) );
 
            if( i == uint( m_firstControl ? 0 : 1 ) )
                m_segment->setPoint( i, m_segment->point( i ).transform( m_mat ) );
        }
    }
 
    if( m_subpath )
        m_subpath->invalidateBoundingBox();
 
    setSuccess( true );
}
 
void
VTranslateBezierCmd::unexecute()
{
    TQWMatrix m2( m_mat.m11(), m_mat.m12(), m_mat.m21(), m_mat.m22(), -m_mat.dx(), -m_mat.dy() );
    if( m_segment )
    {
        for( uint i = 0;i < m_segment->degree();i++ )
        {
            m_segment->selectPoint( i, i == uint( m_firstControl ? 0 : 1 ) );
    
            if( i == uint( m_firstControl ? 0 : 1 ) )
                m_segment->setPoint( i, m_segment->point( i ).transform( m_mat.invert() ) );
        }
 
        if( m_segmenttwo )
        {
            uint index = m_firstControl ? 1 : 0;
            for( uint i = 0;i < m_segmenttwo->degree();i++ )
            {
                m_segmenttwo->selectPoint( i, i == index );
 
            if( i == index )
                m_segmenttwo->setPoint( i, m_segmenttwo->point( i ).transform( m2.invert() ) );
            }
        }
    }
    setSuccess( false );
}
 
void
VTranslateBezierCmd::visitVSubpath( VSubpath& path )
{
    if( m_subpath ) 
        return;
 
    VSegment* segment = path.first();
 
    // check all segments of the path
    while( segment )
    {
        if( segment == m_segment )
        {
            m_subpath = &path;
            break;
        }
        segment = segment->next();
    }
}
 
VTranslatePointCmd::VTranslatePointCmd( VDocument *doc, double d1, double d2 )
        : VCommand( doc, i18n( "Translate Points" ), "translate" )
{
    m_mat.translate( d1, d2 );
 
    if( document() && document()->selection() )
    {
        VObjectListIterator itr( document()->selection()->objects() );
 
        // collect all points to translate
        for( ; itr.current() ; ++itr )
            visit( *itr.current() );
    
        if( m_segPnts.size() > 1 || ( m_segPnts.size() == 0 && m_segPnts.begin().data().size() > 1 ) )
            setName( i18n( "Translate Point" ) );
    }
}
 
VTranslatePointCmd::~VTranslatePointCmd()
{
}
 
void
VTranslatePointCmd::execute()
{
    translatePoints();
    setSuccess( true );
}
 
void
VTranslatePointCmd::unexecute()
{
    m_mat = m_mat.invert();
    translatePoints();
    m_mat = m_mat.invert();
    setSuccess( false );
}
 
void
VTranslatePointCmd::visitVSubpath( VSubpath& path )
{
    if( path.state() == VObject::hidden ||
        path.state() == VObject::normal_locked ||
        path.state() == VObject::hidden_locked )
        return;
 
    VSegment* segment = path.first();
 
    uint segCnt = m_segPnts.size();
 
    // save indices of selected points for all segments
    while( segment )
    {
        TQValueVector<int> pnts;
 
        for( unsigned short i = 0; i < segment->degree(); ++i )
        {
            if( segment->pointIsSelected( i ) )
                pnts.push_back( i );
        }
        if( pnts.size() )
            m_segPnts[segment] = pnts;
 
        segment = segment->next();
    }
 
    // save subpaths which have selected points
    if( segCnt != m_segPnts.size() )
        m_subpaths.append( &path );
}
 
void
VTranslatePointCmd::translatePoints()
{
    TQMap<VSegment*, TQValueVector<int> >::iterator it, et = m_segPnts.end();
 
    // iterate over the segments and transform all selected points
    for( it = m_segPnts.begin(); it != et; ++it )
    {
        VSegment *segment = it.key();
        TQValueVector<int> &pnts = it.data();
 
        int pntCnt = pnts.size();
        for( int i = 0; i < pntCnt; ++i )
            segment->setPoint( pnts[i], segment->point( pnts[i] ).transform( m_mat ) );
    }
 
    // invalidate all changed subpaths
    VObjectListIterator itr( m_subpaths );
    for( ; itr.current(); ++itr )
        itr.current()->invalidateBoundingBox();
}