KoShape.cpp 33.3 KB
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/* This file is part of the KDE project
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   Copyright (C) 2006 Casper Boemann Rasmussen <cbr@boemann.dk>
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   Copyright (C) 2006-2007 Thomas Zander <zander@kde.org>
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   Copyright (C) 2006-2008 Thorsten Zachmann <zachmann@kde.org>
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   Copyright (C) 2007 Jan Hambrecht <jaham@gmx.net>
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   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 "KoShape.h"
#include "KoShapeContainer.h"
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#include "KoShapeLayer.h"
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#include "KoShapeContainerModel.h"
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#include "KoSelection.h"
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#include "KoPointerEvent.h"
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#include "KoInsets.h"
#include "KoShapeBorderModel.h"
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#include "KoShapeManager.h"
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#include "KoShapeUserData.h"
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#include "KoShapeApplicationData.h"
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#include "KoShapeSavingContext.h"
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#include "KoShapeLoadingContext.h"
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#include "KoViewConverter.h"
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#include "KoLineBorder.h"
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#include "ShapeDeleter_p.h"
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#include "KoShapeStyleWriter.h"
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#include "KoShapeShadow.h"
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#include <KoXmlReader.h>
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#include <KoXmlWriter.h>
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#include <KoXmlNS.h>
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#include <KoGenStyle.h>
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#include <KoUnit.h>
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#include <KoOdfStylesReader.h>
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#include <KoOdfGraphicStyles.h>
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#include <KoOdfLoadingContext.h>
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#include <QPainter>
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#include <QVariant>
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#include <QPainterPath>
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#include <QList>
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#include <QMap>
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#include <kdebug.h>

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class KoShape::Private {
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public:
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    Private(KoShape *shape)
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        : size( 50, 50 ),
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        zIndex( 0 ),
        parent( 0 ),
        visible( true ),
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        printable( true ),
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        locked( false ),
        keepAspect( false ),
        selectable( true ),
        detectCollision( false ),
        userData(0),
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        appData(0),
        backgroundBrush(Qt::NoBrush),
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        border(0),
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        me(shape),
        shadow(0)
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    {
    }

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    ~Private() {
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        if( parent )
            parent->removeChild( me );
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        foreach(KoShapeManager *manager, shapeManagers)
            manager->remove(me);
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        delete userData;
        delete appData;
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        if(border) {
            border->removeUser();
            if(border->useCount() == 0)
                delete border;
        }
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        if( shadow && shadow->removeUser() == 0 )
            delete shadow;
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    }

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    void shapeChanged(ChangeType type) {
        if(parent)
            parent->model()->childChanged(me, type);
        me->shapeChanged(type);
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        foreach( KoShape * shape, dependees )
            shape->notifyShapeChanged( me, type );
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    }

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    QSizeF size; // size in pt
    QString shapeId;
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    QString name; ///< the shapes names
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    QMatrix localMatrix; ///< the shapes local transformation matrix
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    QVector<QPointF> connectors; // in pt

    int zIndex;
    KoShapeContainer *parent;

    bool visible;
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    bool printable;
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    bool locked;
    bool keepAspect;
    bool selectable;
    bool detectCollision;

    QSet<KoShapeManager *> shapeManagers;
    KoShapeUserData *userData;
    KoShapeApplicationData *appData;
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    QBrush backgroundBrush; ///< Stands for the background color / fill etc.
    KoShapeBorderModel *border; ///< points to a border, or 0 if there is no border
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    KoShape *me;
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    QList<KoShape*> dependees; ///< list of shape dependent on this shape
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    KoShapeShadow * shadow; ///< the current shape shadow
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    QMap<QString,QString> additionalAttributes;
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};

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KoShape::KoShape()
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    : d(new Private(this))
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{
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    d->connectors.append( QPointF( 0.5, 0.0 ) );
    d->connectors.append( QPointF( 1.0, 0.5 ) );
    d->connectors.append( QPointF( 0.5, 1.0 ) );
    d->connectors.append( QPointF( 0.0, 0.5 ) );

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    notifyChanged();
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}

KoShape::~KoShape()
{
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    d->shapeChanged( Deleted );
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    delete d;
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}

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void KoShape::paintDecorations(QPainter &painter, const KoViewConverter &converter, const KoCanvasBase *canvas) {
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    Q_UNUSED(painter);
    Q_UNUSED(converter);
    Q_UNUSED(canvas);
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/* Since this code is not actually used (kivio is going to be the main user) lets disable instead of fix.
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    if ( selected )
    {
        // draw connectors
        QPen pen( Qt::blue );
        pen.setWidth( 0 );
        painter.setPen( pen );
        painter.setBrush( Qt::NoBrush );
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        for ( int i = 0; i < d->connectors.size(); ++i )
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        {
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            QPointF p = converter.documentToView(d->connectors[ i ]);
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            painter.drawLine( QPointF( p.x() - 2, p.y() + 2 ), QPointF( p.x() + 2, p.y() - 2 ) );
            painter.drawLine( QPointF( p.x() + 2, p.y() + 2 ), QPointF( p.x() - 2, p.y() - 2 ) );
        }
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    }*/
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}

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void KoShape::setScale( double sx, double sy )
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{
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    QPointF pos = position();
    QMatrix scaleMatrix;
    scaleMatrix.translate( pos.x(), pos.y() );
    scaleMatrix.scale( sx, sy );
    scaleMatrix.translate( -pos.x(), -pos.y() );
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    d->localMatrix = d->localMatrix * scaleMatrix;
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    notifyChanged();
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    d->shapeChanged(ScaleChanged);
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}

void KoShape::rotate( double angle )
{
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    QPointF center = d->localMatrix.map( QPointF( 0.5*size().width(), 0.5*size().height() ) );
    QMatrix rotateMatrix;
    rotateMatrix.translate( center.x(), center.y() );
    rotateMatrix.rotate( angle );
    rotateMatrix.translate( -center.x(), -center.y() );
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    d->localMatrix = d->localMatrix * rotateMatrix;
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    notifyChanged();
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    d->shapeChanged(RotationChanged);
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}

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void KoShape::setShear( double sx, double sy )
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{
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    QPointF pos = position();
    QMatrix shearMatrix;
    shearMatrix.translate( pos.x(), pos.y() );
    shearMatrix.shear( sx, sy );
    shearMatrix.translate( -pos.x(), -pos.y() );
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    d->localMatrix = d->localMatrix * shearMatrix;
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    notifyChanged();
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    d->shapeChanged(ShearChanged);
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}

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void KoShape::setSize( const QSizeF &newSize )
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{
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    QSizeF oldSize( size() );
    if(oldSize == newSize )
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        return;
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    d->size = newSize;
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    notifyChanged();
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    d->shapeChanged(SizeChanged);
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}

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void KoShape::setPosition( const QPointF &newPosition )
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{
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    QPointF currentPos = position();
    if( newPosition == currentPos )
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        return;
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    QMatrix translateMatrix;
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    translateMatrix.translate( newPosition.x()-currentPos.x(), newPosition.y()-currentPos.y() );
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    d->localMatrix = d->localMatrix * translateMatrix;

    notifyChanged();
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    d->shapeChanged(PositionChanged);
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}

bool KoShape::hitTest( const QPointF &position ) const
{
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    if(d->parent && d->parent->childClipped(this) && !d->parent->hitTest(position))
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        return false;

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    QPointF point = absoluteTransformation(0).inverted().map( position );
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    QRectF bb( QPointF(), size() );
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    if(d->border)
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    {
        KoInsets insets;
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        d->border->borderInsets(this, insets);
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        bb.adjust(-insets.left, -insets.top, insets.right, insets.bottom);
    }
    if( bb.contains( point ) )
        return true;

    // if there is no shadow we can as well just leave
    if( ! d->shadow )
        return false;
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    // the shadow has an offset to the shape, so we simply
    // check if the position minus the shadow offset hits the shape
    point = absoluteTransformation(0).inverted().map( position-d->shadow->offset() );

    return bb.contains( point );
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}

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QRectF KoShape::boundingRect() const
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{
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    QRectF bb( QPointF(0, 0), size() );
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    if(d->border) {
        KoInsets insets;
        d->border->borderInsets(this, insets);
        bb.adjust(-insets.left, -insets.top, insets.right, insets.bottom);
    }
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    bb = absoluteTransformation(0).mapRect( bb );
    if( d->shadow )
    {
        KoInsets insets;
        d->shadow->insets( this, insets );
        bb.adjust(-insets.left, -insets.top, insets.right, insets.bottom);
    }
    return bb;
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}

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QMatrix KoShape::absoluteTransformation(const KoViewConverter *converter) const {
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    QMatrix matrix;
    // apply parents matrix to inherit any transformations done there.
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    KoShapeContainer * container = d->parent;
    if( container ) {
        if( container->childClipped(this) )
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            matrix = container->absoluteTransformation(0);
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        else {
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            QSizeF containerSize = container->size();
            QPointF containerPos = container->absolutePosition() - QPointF( 0.5*containerSize.width(), 0.5*containerSize.height() );
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            if(converter)
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                containerPos = converter->documentToView(containerPos);
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            matrix.translate( containerPos.x(), containerPos.y() );
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        }
    }

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    if(converter) {
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        QPointF pos = d->localMatrix.map( QPointF() );
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        QPointF trans = converter->documentToView( pos ) - pos;
        matrix.translate( trans.x(), trans.y() );
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    }
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    return d->localMatrix * matrix;
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}

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void KoShape::applyAbsoluteTransformation( const QMatrix &matrix )
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{
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    QMatrix globalMatrix = absoluteTransformation(0);
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    // the transformation is relative to the global coordinate system
    // but we want to change the local matrix, so convert the matrix
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    // to be relative to the local coordinate system
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    QMatrix transformMatrix = globalMatrix * matrix * globalMatrix.inverted();
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    applyTransformation( transformMatrix );
}

void KoShape::applyTransformation( const QMatrix &matrix )
{
    d->localMatrix = matrix * d->localMatrix;
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    notifyChanged();
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    d->shapeChanged(GenericMatrixChange);
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}

void KoShape::setTransformation( const QMatrix &matrix )
{
    d->localMatrix = matrix;
    notifyChanged();
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    d->shapeChanged(GenericMatrixChange);
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}
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QMatrix KoShape::transformation() const
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{
    return d->localMatrix;
}

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bool KoShape::compareShapeZIndex(KoShape *s1, KoShape *s2) {
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    int diff = s1->zIndex() - s2->zIndex();
    if(diff == 0) {
        KoShape *s = s1->parent();
        while(s) {
            if(s == s2) // s1 is a child of s2
                return false; // children are always on top of their parents.
            s = s->parent();
        }
        s = s2->parent();
        while(s) {
            if(s == s1) // s2 is a child of s1
                return true;
            s = s->parent();
        }
    }
    return diff < 0;
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}

void KoShape::setParent(KoShapeContainer *parent) {
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    if(d->parent == parent)
        return;
    if(parent && dynamic_cast<KoShape*>(parent) != this) {
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        if (d->parent)
            d->parent->removeChild(this);
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        d->parent = parent;
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        parent->addChild(this);
    }
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    else
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        d->parent = 0;
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    notifyChanged();
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    d->shapeChanged(ParentChanged);
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}

int KoShape::zIndex() const {
    if(parent()) // we can't be under our parent...
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        return qMax(d->zIndex, parent()->zIndex());
    return d->zIndex;
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}

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void KoShape::update() const {
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    if ( !d->shapeManagers.empty() )
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    {
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        QRectF rect( boundingRect() );
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        foreach( KoShapeManager * manager, d->shapeManagers )
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            manager->update( rect, this, true );
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    }
}

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void KoShape::update(const QRectF &shape) const {
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    if ( !d->shapeManagers.empty() && isVisible() )
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    {
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        QRectF rect(absoluteTransformation(0).mapRect(shape));
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        foreach( KoShapeManager * manager, d->shapeManagers )
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        {
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            manager->update(rect);
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        }
    }
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}

const QPainterPath KoShape::outline() const {
    QPainterPath path;
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    path.addRect(QRectF( QPointF(0, 0), QSizeF( qMax(d->size.width(), 0.0001), qMax(d->size.height(), 0.0001) ) ));
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    return path;
}

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QPointF KoShape::absolutePosition(KoFlake::Position anchor) const {
    QPointF point;
    switch(anchor) {
        case KoFlake::TopLeftCorner: break;
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        case KoFlake::TopRightCorner: point = QPointF(size().width(), 0.0); break;
        case KoFlake::BottomLeftCorner: point = QPointF(0.0, size().height()); break;
        case KoFlake::BottomRightCorner: point = QPointF(size().width(), size().height()); break;
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        case KoFlake::CenteredPosition: point = QPointF(size().width() / 2.0, size().height() / 2.0); break;
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    }
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    return absoluteTransformation(0).map(point);
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}

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void KoShape::setAbsolutePosition(QPointF newPosition, KoFlake::Position anchor) {
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    QPointF currentAbsPosition = absolutePosition( anchor );
    QPointF translate = newPosition - currentAbsPosition;
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    QMatrix translateMatrix;
    translateMatrix.translate( translate.x(), translate.y() );
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    applyAbsoluteTransformation( translateMatrix );
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    notifyChanged();
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    d->shapeChanged(PositionChanged);
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}

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void KoShape::copySettings(const KoShape *shape) {
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    d->size = shape->size();
    d->connectors.clear();
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    foreach(QPointF point, shape->connectionPoints())
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        addConnectionPoint(point);
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    d->zIndex = shape->zIndex();
    d->visible = shape->isVisible();
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    // Ensure printable is true by default
    if (!d->visible)
        d->printable = true;
    else
        d->printable = shape->isPrintable();
        
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    d->locked = shape->isLocked();
    d->keepAspect = shape->keepAspectRatio();
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    d->localMatrix = shape->d->localMatrix;
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}

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void KoShape::notifyChanged()
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{
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    foreach( KoShapeManager * manager, d->shapeManagers )
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    {
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        manager->notifyShapeChanged( this );
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    }
}

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void KoShape::setUserData(KoShapeUserData *userData) {
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    delete d->userData;
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    d->userData = userData;
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}

KoShapeUserData *KoShape::userData() const {
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    return d->userData;
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}

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void KoShape::setApplicationData(KoShapeApplicationData *appData) {
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    // appdata is deleted by the application.
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    d->appData = appData;
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}

KoShapeApplicationData *KoShape::applicationData() const {
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    return d->appData;
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}

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bool KoShape::hasTransparency() {
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    if(d->backgroundBrush.style() == Qt::NoBrush)
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        return true;
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    return !d->backgroundBrush.isOpaque();
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}

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KoInsets KoShape::borderInsets() const {
    KoInsets answer;
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    if(d->border)
        d->border->borderInsets(this, answer);
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    return answer;
}

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double KoShape::rotation() const {
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    // try to extract the rotation angle out of the local matrix
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    // if it is a pure rotation matrix

    // check if the matrix has shearing mixed in
    if( fabs( fabs(d->localMatrix.m12()) - fabs(d->localMatrix.m21()) ) > 1e-10 )
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        return NAN;
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    // check if the matrix has scaling mixed in
    if( fabs( d->localMatrix.m11() - d->localMatrix.m22() ) > 1e-10 )
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        return NAN;
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    // calculate the angle from the matrix elements
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    double angle = atan2( -d->localMatrix.m21(), d->localMatrix.m11() ) * 180.0 / M_PI;
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    if( angle < 0.0 )
        angle += 360.0;

    return angle;
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}

QSizeF KoShape::size () const {
    return d->size;
}

QPointF KoShape::position() const {
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    QPointF center( 0.5*size().width(), 0.5*size().height() );
    return d->localMatrix.map( center ) - center;
    //return d->localMatrix.map( QPointF(0,0) );
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}

void KoShape::addConnectionPoint( const QPointF &point ) {
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    QSizeF s = size();
    // convert glue point from shape coordinates to factors of size
    d->connectors.append( QPointF( point.x() / s.width(), point.y() / s.height() ) );
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}

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QList<QPointF> KoShape::connectionPoints() const {
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    QList<QPointF> points;
    QSizeF s = size();
    // convert glue points to shape coordinates
    foreach( QPointF cp, d->connectors )
        points.append( QPointF( s.width() * cp.x(), s.height() * cp.y() ) );

    return points;
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}

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void KoShape::setBackground ( const QBrush & brush ) {
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    d->backgroundBrush = brush;
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    d->shapeChanged(BackgroundChanged);
    notifyChanged();
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}

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QBrush KoShape::background() const {
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    return d->backgroundBrush;
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}

void KoShape::setZIndex(int zIndex) {
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    notifyChanged();
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    d->zIndex = zIndex;
}

void KoShape::setVisible(bool on) {
    d->visible = on;
}

bool KoShape::isVisible() const {
    return d->visible;
}

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void KoShape::setPrintable(bool on)
{
    d->printable = on;
}
    
bool KoShape::isPrintable() const
{
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    if (d->visible)
        return d->printable;
    else
        return false;
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}

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void KoShape::setSelectable(bool selectable) {
    d->selectable = selectable;
}

bool KoShape::isSelectable() const {
    return d->selectable;
}

void KoShape::setLocked(bool locked) {
    d->locked = locked;
}

bool KoShape::isLocked() const {
    return d->locked;
}

KoShapeContainer *KoShape::parent() const {
    return d->parent;
}

void KoShape::setKeepAspectRatio(bool keepAspect) {
    d->keepAspect = keepAspect;
}

bool KoShape::keepAspectRatio() const {
    return d->keepAspect;
}

const QString &KoShape::shapeId() const {
    return d->shapeId;
}

void KoShape::setShapeId(const QString &id) {
    d->shapeId = id;
}

void KoShape::setCollisionDetection(bool detect) {
    d->detectCollision = detect;
}

bool KoShape::collisionDetection() {
    return d->detectCollision;
}

void KoShape::addShapeManager( KoShapeManager * manager ) {
    d->shapeManagers.insert( manager );
}

void KoShape::removeShapeManager( KoShapeManager * manager ) {
    d->shapeManagers.remove( manager );
}

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KoShapeBorderModel *KoShape::border() const {
    return d->border;
}

void KoShape::setBorder(KoShapeBorderModel *border) {
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    if(d->border)
        d->border->removeUser();
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    d->border = border;
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    if(d->border)
        d->border->addUser();
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    d->shapeChanged(BorderChanged);
    notifyChanged();
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}

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void KoShape::setShadow( KoShapeShadow * shadow )
{
    if( d->shadow )
        d->shadow->removeUser();
    d->shadow = shadow;
    if( d->shadow )
        d->shadow->addUser();
    d->shapeChanged(ShadowChanged);
    notifyChanged();
}

KoShapeShadow * KoShape::shadow() const
{
    return d->shadow;
}

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const QMatrix& KoShape::matrix() const {
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    return d->localMatrix;
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}

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void KoShape::removeConnectionPoint( int index )
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{
    if( index < d->connectors.count() )
        d->connectors.remove( index );
}

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QString KoShape::name() const {
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    return d->name;
}

void KoShape::setName( const QString & name ) {
    d->name = name;
}
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void KoShape::deleteLater() {
    foreach(KoShapeManager *manager, d->shapeManagers)
        manager->remove(this);
    d->shapeManagers.clear();
    new ShapeDeleter(this);
}

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bool KoShape::isEditable() const {
    if( !d->visible || d->locked )
        return false;

    KoShapeContainer * p = parent();
    if(p && p->isChildLocked(this))
        return false;
    while( p )
    {
        if( ! p->isVisible() )
            return false;
        p = p->parent();
    }

    return true;
}
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// loading & saving methods
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void KoShape::saveOdfConnections(KoShapeSavingContext &context) const {
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    // TODO  save "draw-glue-point" elements (9.2.19)
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    Q_UNUSED( context );
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}
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QString KoShape::saveStyle( KoGenStyle &style, KoShapeSavingContext &context ) const
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{
    // and fill the style
    KoShapeBorderModel * b = border();
    if ( b )
    {
        b->fillStyle( style, context );
    }
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    KoShapeShadow * s = shadow();
    if( s )
        s->fillStyle( style, context );
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    KoShapeStyleWriter styleWriter( context );
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    return styleWriter.addFillStyle( style, background() );
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}

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void KoShape::loadStyle( const KoXmlElement & element, KoShapeLoadingContext &context )
{
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    KoStyleStack &styleStack = context.odfLoadingContext().styleStack();
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    styleStack.save();

    // fill the style stack with the shapes style
    if( element.hasAttributeNS( KoXmlNS::draw, "style-name" ) )
    {
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        context.odfLoadingContext().fillStyleStack( element, KoXmlNS::draw, "style-name", "graphic" );
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        styleStack.setTypeProperties( "graphic" );
    }
    else if( element.hasAttributeNS( KoXmlNS::presentation, "style-name" ) )
    {
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        context.odfLoadingContext().fillStyleStack( element, KoXmlNS::presentation, "style-name", "presentation" );
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        styleStack.setTypeProperties( "graphic" );
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    }

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    setBackground( loadOdfFill( element, context ) );
    setBorder( loadOdfStroke( element, context ) );
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    setShadow( loadOdfShadow( element, context ) );
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    styleStack.restore();
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}

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bool KoShape::loadOdfAttributes( const KoXmlElement & element, KoShapeLoadingContext &context, int attributes )
{
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    if ( attributes & OdfSize ) {
        QPointF pos;
        pos.setX( KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "x", QString() ) ) );
        pos.setY( KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "y", QString() ) ) );
        setPosition( pos );

        QSizeF size;
        size.setWidth( KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "width", QString() ) ) );
        size.setHeight( KoUnit::parseValue( element.attributeNS( KoXmlNS::svg, "height", QString() ) ) );
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        setSize( size );
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    }

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    if ( attributes & OdfMandatories ) {
        if ( element.hasAttributeNS( KoXmlNS::draw, "layer" ) ) {
            KoShapeLayer * layer = context.layer( element.attributeNS( KoXmlNS::draw, "layer" ) );
            if ( layer ) {
                setParent( layer );
            }
        }
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        if ( element.hasAttributeNS( KoXmlNS::draw, "id" ) ) {
            QString id = element.attributeNS( KoXmlNS::draw, "id" );
            if ( !id.isNull() ) {
                context.addShapeId( this, id );
            }
        }
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        if ( element.hasAttributeNS( KoXmlNS::draw, "z-index" ) ) {
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            context.addShapeZIndex( this, element.attributeNS( KoXmlNS::draw, "z-index" ).toInt() );
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        }
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        setZIndex( context.zIndex() );
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        if( element.hasAttributeNS( KoXmlNS::draw, "name" ) ) {
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            setName( element.attributeNS( KoXmlNS::draw, "name" ) );
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        }
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        loadStyle( element, context );
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    }
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    if( attributes & OdfTransformation )
    {
        QString transform = element.attributeNS( KoXmlNS::draw, "transform", QString() );
        if( ! transform.isEmpty() )
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            applyAbsoluteTransformation( parseOdfTransform( transform ) );
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    }

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    return true;
}

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QString KoShape::getStyleProperty( const char *property, const KoXmlElement & element, KoShapeLoadingContext & context )
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{
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    KoStyleStack &styleStack = context.odfLoadingContext().styleStack();
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    QString value;
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    if ( styleStack.hasProperty( KoXmlNS::draw, property ) ) {
        value = styleStack.property( KoXmlNS::draw, property );
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    }

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    return value;
}

QBrush KoShape::loadOdfFill( const KoXmlElement & element, KoShapeLoadingContext & context )
{
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    KoStyleStack &styleStack = context.odfLoadingContext().styleStack();
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    QString fill = getStyleProperty( "fill", element, context );
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    if ( fill == "solid" || fill == "hatch" )
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        return KoOdfGraphicStyles::loadOasisFillStyle( styleStack, fill, context.odfLoadingContext().stylesReader() );
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    else if( fill == "gradient" )
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        return KoOdfGraphicStyles::loadOasisGradientStyle( styleStack, context.odfLoadingContext().stylesReader(), size() );
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    else if( fill == "bitmap" )
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        return KoOdfGraphicStyles::loadOasisPatternStyle( styleStack, context.odfLoadingContext(), size() );
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    return QBrush();
}

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KoShapeBorderModel * KoShape::loadOdfStroke( const KoXmlElement & element, KoShapeLoadingContext & context )
{
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    KoStyleStack &styleStack = context.odfLoadingContext().styleStack();
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    QString stroke = getStyleProperty( "stroke", element, context );
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    if( stroke == "solid" || stroke == "dash" )
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    {
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        QPen pen = KoOdfGraphicStyles::loadOasisStrokeStyle( styleStack, stroke, context.odfLoadingContext().stylesReader() );
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        KoLineBorder * border = new KoLineBorder();
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        border->setLineWidth( pen.widthF() );
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        border->setColor( pen.color() );
        border->setJoinStyle( pen.joinStyle() );
        border->setLineStyle( pen.style(), pen.dashPattern() );
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        return border;
    }
    else
        return 0;
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}

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KoShapeShadow * KoShape::loadOdfShadow( const KoXmlElement & element, KoShapeLoadingContext & context )
{
    KoStyleStack &styleStack = context.odfLoadingContext().styleStack();
    QString stroke = getStyleProperty( "shadow", element, context );
    if( stroke == "visible" || stroke == "hidden" )
    {
        KoShapeShadow * shadow = new KoShapeShadow();
        QColor shadowColor( styleStack.property( KoXmlNS::draw, "shadow-color" ) );
        qreal offsetX = KoUnit::parseValue( styleStack.property( KoXmlNS::draw, "shadow-offset-x" ) );
        qreal offsetY = KoUnit::parseValue( styleStack.property( KoXmlNS::draw, "shadow-offset-y" ) );
        shadow->setOffset( QPointF( offsetX, offsetY ) );

        QString opacity = styleStack.property( KoXmlNS::draw, "shadow-opacity" );
        if( ! opacity.isEmpty() && opacity.right( 1 ) == "%" )
            shadowColor.setAlphaF( opacity.left( opacity.length()-1 ).toFloat() / 100.0 );
        shadow->setColor( shadowColor );

        return shadow;
    }
    return 0;
}

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QMatrix KoShape::parseOdfTransform( const QString &transform )
{
    QMatrix matrix;

    // Split string for handling 1 transform statement at a time
    QStringList subtransforms = transform.split(')', QString::SkipEmptyParts);
    QStringList::ConstIterator it = subtransforms.begin();
    QStringList::ConstIterator end = subtransforms.end();
    for(; it != end; ++it)
    {
        QStringList subtransform = (*it).split('(', QString::SkipEmptyParts);

        subtransform[0] = subtransform[0].trimmed().toLower();
        subtransform[1] = subtransform[1].simplified();
        QRegExp reg("[,( ]");
        QStringList params = subtransform[1].split(reg, QString::SkipEmptyParts);

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        if(subtransform[0].startsWith(';') || subtransform[0].startsWith(','))
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            subtransform[0] = subtransform[0].right(subtransform[0].length() - 1);

        if(subtransform[0] == "rotate")
        {
            // TODO find out what oo2 really does when rotating, it seems severly broken
            if(params.count() == 3)
            {
                double x = KoUnit::parseValue( params[1] );
                double y = KoUnit::parseValue( params[2] );

                matrix.translate(x, y);
                // oo2 rotates by radians
                matrix.rotate( params[0].toDouble()*180.0/M_PI );
                matrix.translate(-x, -y);
            }
            else
            {
                // oo2 rotates by radians
                matrix.rotate( params[0].toDouble()*180.0/M_PI );
            }
        }
        else if(subtransform[0] == "translate")
        {
            if(params.count() == 2)
            {
                double x = KoUnit::parseValue( params[0] );
                double y = KoUnit::parseValue( params[1] );
                matrix.translate(x, y);
            }
            else    // Spec : if only one param given, assume 2nd param to be 0
                matrix.translate( KoUnit::parseValue( params[0] ) , 0);
        }
        else if(subtransform[0] == "scale")
        {
            if(params.count() == 2)
                matrix.scale(params[0].toDouble(), params[1].toDouble());
            else    // Spec : if only one param given, assume uniform scaling
                matrix.scale(params[0].toDouble(), params[0].toDouble());
        }
        else if(subtransform[0] == "skewx")
            matrix.shear(tan(params[0].toDouble()), 0.0F);
        else if(subtransform[0] == "skewy")
            matrix.shear(tan(params[0].toDouble()), 0.0F);
        else if(subtransform[0] == "skewy")
            matrix.shear(0.0F, tan(params[0].toDouble()));
        else if(subtransform[0] == "matrix")
        {
            if(params.count() >= 6)
                matrix.setMatrix(params[0].toDouble(), params[1].toDouble(), params[2].toDouble(), params[3].toDouble(), KoUnit::parseValue( params[4] ), KoUnit::parseValue( params[5] ) );
        }
    }

    return matrix;
}

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void KoShape::saveOdfFrameAttributes(KoShapeSavingContext &context) const {
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    saveOdfAttributes(context, FrameAttributes);
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    context.addOption(KoShapeSavingContext::FrameOpened);
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}

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void KoShape::saveOdfAttributes(KoShapeSavingContext &context, int attributes) const {
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    if(attributes & OdfMandatories) {
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        KoGenStyle style;
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        // all items that should be written to 'draw:frame' and any other 'draw:' object that inherits this shape
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        if ( context.isSet( KoShapeSavingContext::PresentationShape ) ) {
            style = KoGenStyle( KoGenStyle::StylePresentationAuto, "presentation" );
            context.xmlWriter().addAttribute( "presentation:style-name", saveStyle( style, context ) );
        }
        else {
            style = KoGenStyle( KoGenStyle::StyleGraphicAuto, "graphic" );
            context.xmlWriter().addAttribute( "draw:style-name", saveStyle( style, context ) );
        }
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        if ( context.isSet( KoShapeSavingContext::DrawId ) )
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        {
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            context.xmlWriter().addAttribute( "draw:id", context.drawId( this ) );
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        }

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        if( ! name().isEmpty() )
            context.xmlWriter().addAttribute( "draw:name", name() );

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        if(d->parent && dynamic_cast<KoShapeLayer*> (d->parent))
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            context.xmlWriter().addAttribute("draw:layer", d->parent->name());
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    }

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    // all items after this should not be written out when they have already be written in
    // a 'draw:frame' attribute.
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    if(context.isSet(KoShapeSavingContext::FrameOpened)) {
        context.removeOption(KoShapeSavingContext::FrameOpened);
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        return;
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    }

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    if(attributes & OdfSize) {
        QSizeF s( size() );
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        context.xmlWriter().addAttributePt( "svg:width", s.width() );
        context.xmlWriter().addAttributePt( "svg:height", s.height() );
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        // the position is hidden in the transformation
        context.xmlWriter().addAttributePt( "svg:x", 0.0 );
        context.xmlWriter().addAttributePt( "svg:y", 0.0 );
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    }

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    if(attributes & OdfTransformation) {
        // just like in shapes; ODF allows you to manipulate the 'matrix' after setting an
        // ofset on the shape (using the x and y positions).   Lets save them here.
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        /*
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        bool rotate = qAbs(d->angle) > 1E-6;
        bool skew = qAbs(d->shearX) > 1E-6 || qAbs(d->shearY) > 1E-6;
        bool scale = qAbs(d->scaleX - 1) > 1E-6 || qAbs(d->scaleY -1) > 1E-6;

        if(rotate && (skew || scale)) {
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            QMatrix matrix; // can't use absoluteTransformation() as that includes transformation of the container as well.
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            QSizeF size(this->size());
            if ( d->angle != 0 )
            {
                matrix.translate( size.width() / 2.0 * d->scaleX, size.height() / 2.0 * d->scaleY );
                matrix.translate( size.height() / 2.0 * d->shearX, size.width() / 2.0 * d->shearY );
                matrix.rotate( d->angle );
                matrix.translate( -size.width() / 2.0 * d->scaleX, -size.height() / 2.0 * d->scaleY );
                matrix.translate( -size.height() / 2.0 * d->shearX, -size.width() / 2.0 * d->shearY );
            }
            matrix.shear( d->shearX, d->shearY );
            matrix.scale( d->scaleX, d->scaleY );

            QString m = QString( "matrix(0 0 %3 %4 %5pt %6pt)" ).arg( matrix.m11() ).arg( matrix.m12() )
                .arg( matrix.m21() ).arg( matrix.m22() )
                .arg( matrix.dx() ) .arg( matrix.dy() );
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            context.xmlWriter().addAttribute( "draw:transform", m );
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        }
        else if(rotate || skew || scale) {
            QString transform;
            if(rotate)
                transform = "rotate("+ QString::number(d->angle) +')';
            if(skew)
                transform = "skewX("+ QString::number(d->shearX) +") skewY("+ QString::number(d->shearY) +')';
            if(scale) {
                transform += "scale("+ QString::number(d->scaleX);
                if(d->scaleX != d->scaleY)
                    transform += ','+ QString::number(d->scaleY);
                transform += ')';
            }

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            context.xmlWriter().addAttribute( "draw:transform", transform );
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        }
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        */
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        QMatrix matrix = absoluteTransformation(0);
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        if( ! matrix.isIdentity() )
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        {
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            QString m = QString( "matrix(%1 %2 %3 %4 %5pt %6pt)" )
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                    .arg( matrix.m11() ).arg( matrix.m12() )
                    .arg( matrix.m21() ).arg( matrix.m22() )
                    .arg( matrix.dx() ) .arg( matrix.dy() );
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            context.xmlWriter().addAttribute( "draw:transform", m );
        }
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    }
}

// end loading & saving methods


// static
void KoShape::applyConversion(QPainter &painter, const KoViewConverter &converter) {
    double zoomX, zoomY;
    converter.zoom(&zoomX, &zoomY);
    painter.scale(zoomX, zoomY);
}

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QPointF KoShape::shapeToDocument( const QPointF &point ) const
{
    return absoluteTransformation(0).map( point );
}

QRectF KoShape::shapeToDocument( const QRectF &rect ) const 
{
    return absoluteTransformation(0).mapRect( rect );
}

QPointF KoShape::documentToShape( const QPointF &point ) const
{
    return absoluteTransformation(0).inverted().map( point );
}

QRectF KoShape::documentToShape( const QRectF &rect ) const
{
    return absoluteTransformation(0).inverted().mapRect( rect );
}


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void KoShape::addDependee( KoShape * shape )
{
    if( ! d->dependees.contains( shape ) )
        d->dependees.append( shape );
}

void KoShape::removeDependee( KoShape * shape )
{
    int index = d->dependees.indexOf( shape );
    if( index >= 0 )
        d->dependees.removeAt( index );
}

void KoShape::notifyShapeChanged( KoShape * shape, ChangeType type )
{
    Q_UNUSED( shape );
    Q_UNUSED( type );
}
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KoSnapData KoShape::snapData() const
{
    return KoSnapData();
}
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void KoShape::setAddtionalAttribute( const QString & name, const QString & value )
{
    d->additionalAttributes.insert( name, value );
}

void KoShape::removeAddtionalAttribute( const QString & name )
{
    d->additionalAttributes.remove( name );
}

bool KoShape::hasAdditionalAttribute( const QString & name )
{
    return d->additionalAttributes.contains( name );
}

QString KoShape::addtionalAttribute( const QString & name )
{
    return d->additionalAttributes.value( name );
}