qgscomposerpicture.h

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/***************************************************************************
                         qgscomposerpicture.h
                             -------------------
    begin                : September 2005
    copyright            : (C) 2005 by Radim Blazek
    email                : [email protected]
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSCOMPOSERPICTURE_H
#define QGSCOMPOSERPICTURE_H

#include "qgscomposeritem.h"
#include <QFile>
#include <QImage>
#include <QSvgRenderer>

class QgsComposerMap;

class CORE_EXPORT QgsComposerPicture: public QgsComposerItem
{
    Q_OBJECT
  public:
    QgsComposerPicture( QgsComposition *composition );
    ~QgsComposerPicture();

    virtual int type() const { return ComposerPicture; }

    void paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget );

    void setPictureFile( const QString& path );
    QString pictureFile() const;

    void setSceneRect( const QRectF& rectangle );

    bool writeXML( QDomElement& elem, QDomDocument & doc ) const;

    bool readXML( const QDomElement& itemElem, const QDomDocument& doc );

    double rotation() const { return mPictureRotation;};

    double pictureRotation() const { return mPictureRotation;};

    void setRotationMap( int composerMapId );
    int rotationMap() const;
    bool useRotationMap() const {return mRotationMap;}

    bool imageSizeConsideringRotation( double& width, double& height ) const;
    bool cornerPointOnRotatedAndScaledRect( double& x, double& y, double width, double height ) const;
    void sizeChangedByRotation( double& width, double& height );

  public slots:
    virtual void setRotation( double r );

    virtual void setPictureRotation( double r );

  signals:
    void pictureRotationChanged( double newRotation );

  private:

    enum Mode //SVG or raster graphic format
    {
      SVG,
      RASTER,
      Unknown
    };

    //default constructor is forbidden
    QgsComposerPicture();
    QRectF boundedSVGRect( double deviceWidth, double deviceHeight );
    QRectF boundedImageRect( double deviceWidth, double deviceHeight );

    QSizeF pictureSize();

    QImage mImage;
    QSvgRenderer mSVG;
    QFile mSourceFile;
    Mode mMode;

    QSize mDefaultSvgSize;

    double mPictureRotation;
    const QgsComposerMap* mRotationMap;
    double mPictureWidth;
    double mPictureHeight;
};

#endif