qgscomposerarrow.h

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/***************************************************************************
                         qgscomposerarrow.h
                         ----------------------
    begin                : November 2009
    copyright            : (C) 2009 by Marco Hugentobler
    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 QGSCOMPOSERARROW_H
#define QGSCOMPOSERARROW_H

#include "qgscomposeritem.h"
#include <QBrush>
#include <QPen>

class CORE_EXPORT QgsComposerArrow: public QgsComposerItem
{
  public:

    enum MarkerMode
    {
      DefaultMarker,
      NoMarker,
      SVGMarker
    };

    QgsComposerArrow( QgsComposition* c );
    QgsComposerArrow( const QPointF& startPoint, const QPointF& stopPoint, QgsComposition* c );
    ~QgsComposerArrow();

    virtual int type() const { return ComposerArrow; }

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

    void setSceneRect( const QRectF& rectangle );

    void setArrowHeadWidth( double width );
    double arrowHeadWidth() const {return mArrowHeadWidth;}

    void setOutlineWidth( double width );
    double outlineWidth() const {return mPen.widthF();}

    void setStartMarker( const QString& svgPath );
    QString startMarker() const {return mStartMarkerFile;}
    void setEndMarker( const QString& svgPath );
    QString endMarker() const {return mEndMarkerFile;}

    QColor arrowColor() const { return mArrowColor; }
    void setArrowColor( const QColor& c ) { mArrowColor = c; }

    MarkerMode markerMode() const { return mMarkerMode;}
    void setMarkerMode( MarkerMode mode );

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

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

  private:

    enum MarkerType
    {
      StartMarker,
      EndMarker
    };

    QPointF mStartPoint;
    QPointF mStopPoint;

    int mStartXIdx;
    int mStartYIdx;

    QPen mPen;
    QBrush mBrush;

    double mArrowHeadWidth;
    double mStartArrowHeadHeight;
    double mStopArrowHeadHeight;

    QString mStartMarkerFile;
    QString mEndMarkerFile;
    MarkerMode mMarkerMode;
    QColor mArrowColor;
    int mBoundsBehaviour;

    void adaptItemSceneRect();
    double computeMarkerMargin() const;
    void drawHardcodedMarker( QPainter* p, MarkerType type );
    void drawSVGMarker( QPainter* p, MarkerType type, const QString& markerPath );
    void initGraphicsSettings();
};

#endif // QGSCOMPOSERARROW_H