vqpainter.cpp

/* This file is part of the KDE project
   Copyright (C) 2001, The Karbon Developers
   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.
*/
 
// qpainter wrapper
 
#include "vqpainter.h"
#include "vstroke.h"
#include "vcolor.h"
#include "vfill.h"
 
#include <tqpainter.h>
#include <tqpaintdevice.h>
#include <tqpen.h>
 
#include <KoPoint.h>
#include <kdebug.h>
 
VTQPainter::VTQPainter( TQPaintDevice *target, unsigned int w, unsigned int h ) : VPainter( target, w, h ), m_painter( 0L ), m_target( target ), m_width( w ), m_height( h )
{
    m_zoomFactor = 1;
    m_index = 0;
    m_painter = new TQPainter( target );
}
 
VTQPainter::~VTQPainter()
{
    delete m_painter;
}
 
void
VTQPainter::resize( unsigned int w, unsigned int h )
{
    m_width = w;
    m_height = h;
}
 
void
VTQPainter::blit( const KoRect & )
{
    end();
}
 
void
VTQPainter::clear( const TQColor &c )
{
    m_painter->setBackgroundColor( c );
    m_painter->eraseRect( 0, 0, m_width, m_height );
}
 
void
VTQPainter::begin()
{
    if( !m_painter->isActive() )
    {
        m_painter->begin( m_target );
        m_painter->eraseRect( 0, 0, m_width, m_height );
    }
}
 
void
VTQPainter::end()
{
    m_painter->end();
}
 
const TQWMatrix
VTQPainter::worldMatrix()
{
    return m_painter->worldMatrix();
}
 
void
VTQPainter::setWorldMatrix( const TQWMatrix& mat )
{
    m_painter->setWorldMatrix( mat );
}
 
void
VTQPainter::setZoomFactor( double zoomFactor )
{
    m_zoomFactor = zoomFactor;
    /*TQWMatrix mat;
    mat.scale( zoomFactor, zoomFactor );
    m_painter->setWorldMatrix( mat );*/
}
 
void 
VTQPainter::moveTo( const KoPoint &p )
{
    //m_index = 0;
    if( m_pa.size() <= m_index )
        m_pa.resize( m_index + 10 );
 
    m_pa.setPoint( m_index, static_cast<int>(p.x() * m_zoomFactor), static_cast<int>(p.y() * m_zoomFactor) );
 
    m_index++;
}
 
void 
VTQPainter::lineTo( const KoPoint &p )
{
    if( m_pa.size() <= m_index )
        m_pa.resize( m_index + 10 );
 
    m_pa.setPoint( m_index, static_cast<int>(p.x() * m_zoomFactor), static_cast<int>(p.y() * m_zoomFactor) );
 
    m_index++;
}
 
void
VTQPainter::curveTo( const KoPoint &p1, const KoPoint &p2, const KoPoint &p3 )
{
    // calculate cubic bezier using a temp TQPointArray
    TQPointArray pa( 4 );
    pa.setPoint( 0, m_pa.point( m_index - 1 ).x(), m_pa.point( m_index - 1 ).y() );
    pa.setPoint( 1, static_cast<int>(p1.x() * m_zoomFactor), static_cast<int>(p1.y() * m_zoomFactor) );
    pa.setPoint( 2, static_cast<int>(p2.x() * m_zoomFactor), static_cast<int>(p2.y() * m_zoomFactor) );
    pa.setPoint( 3, static_cast<int>(p3.x() * m_zoomFactor), static_cast<int>(p3.y() * m_zoomFactor) );
 
    TQPointArray pa2( pa.cubicBezier() );
 
    m_pa.resize( m_index + pa2.size() );
    m_pa.putPoints( m_index, pa2.size(), pa2 );
 
    m_index += pa2.size();
}
 
void
VTQPainter::newPath()
{
    m_index = 0;
}
 
void
VTQPainter::fillPath()
{
    // we probably dont need filling for qpainter
    //m_index = 0;
    m_painter->drawPolygon( m_pa, false, 0, m_index );
}
 
void
VTQPainter::strokePath()
{
    m_painter->drawPolyline( m_pa, 0, m_index );
    m_index = 0;
}
 
void
VTQPainter::setPen( const VStroke &stroke )
{
    TQPen pen;
 
    // color + linewidth
    pen.setColor( stroke.color() );
    pen.setWidth( static_cast<int>(stroke.lineWidth()) );
 
    // caps
    if( stroke.lineCap() == VStroke::capButt )
        pen.setCapStyle( TQt::FlatCap );
    else if( stroke.lineCap() == VStroke::capRound )
        pen.setCapStyle( TQt::RoundCap );
    else if( stroke.lineCap() == VStroke::capSquare )
        pen.setCapStyle( TQt::SquareCap );
 
    m_painter->setPen( pen );
}
 
void
VTQPainter::setBrush( const VFill &fill )
{
    switch( fill.type() )
    {
        case VFill::none:
            m_painter->setBrush( TQt::NoBrush );
        break;
        case VFill::solid:
            m_painter->setBrush( TQBrush( fill.color(), TQt::SolidPattern ) );
        break;
        case VFill::grad:
            // gradients are nor supported by qpainter
            m_painter->setBrush( TQt::NoBrush );
        break;
        case VFill::patt:
            // pixmap brushes not supported for printing
            m_painter->setBrush( TQBrush( fill.color(), fill.pattern().pixmap() ) );
        break;
        default:
        break;
    }
}
 
void
VTQPainter::setPen( const TQColor &c )
{
    m_painter->setPen( c );
}
 
void
VTQPainter::setPen( TQt::PenStyle style )
{
    m_painter->setPen( style );
}
 
void
VTQPainter::setBrush( const TQColor &c )
{
    m_painter->setBrush( c );
}
 
void
VTQPainter::setBrush( TQt::BrushStyle style )
{
    m_painter->setBrush( style );
}
 
void
VTQPainter::save()
{
    m_painter->save();
}
 
void
VTQPainter::restore()
{
    m_painter->restore();
}
 
void
VTQPainter::setRasterOp( TQt::RasterOp r )
{
    m_painter->setRasterOp( r );
}
 
void
VTQPainter::drawNode( const KoPoint &p, int width )
{
    m_painter->drawRect( TQRect( int( p.x() * m_zoomFactor ) - width, int( p.y() * m_zoomFactor ) - width,
                                2 * width + 1,  2 * width + 1 ) );
}
 
void
VTQPainter::drawRect( const KoRect &rect )
{
    m_painter->drawRect( TQRect( int( rect.x() ), int( rect.y() ), int( rect.width() ),  int( rect.height() ) ) );
}
 
void
VTQPainter::drawImage( const TQImage &image, const TQWMatrix &affine )
{
    TQWMatrix matrix = m_painter->worldMatrix();
    
    double m11 = affine.m11() * matrix.m11() * m_zoomFactor + affine.m12() * matrix.m21();
    double m12 = (affine.m11() * matrix.m12() + affine.m12() * matrix.m22() ) * m_zoomFactor;
    double m21 = (affine.m21() * matrix.m11() + affine.m22() * matrix.m21() ) * m_zoomFactor;
    double m22 = affine.m22() * matrix.m22() * m_zoomFactor + affine.m21() * matrix.m12();
    double dx = matrix.dx() + affine.dx() * m_zoomFactor;
    double dy = matrix.dy() - affine.dy() * m_zoomFactor;
    
    TQWMatrix world( m11, m12, m21, m22, dx, dy );
    
    m_painter->setWorldMatrix( world );
    
    m_painter->drawImage( TQPoint( 0, 0 ), image );
    // restore old world matrix
    m_painter->setWorldMatrix( matrix );
}