src/gui/qgsrubberband.h

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/***************************************************************************
    qgsrubberband.h - Rubberband widget for drawing multilines and polygons
     --------------------------------------
    Date                 : 07-Jan-2006
    Copyright            : (C) 2006 by Tom Elwertowski
    Email                : telwertowski at users dot sourceforge dot net
 ***************************************************************************
 *                                                                         *
 *   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 QGSRUBBERBAND_H
#define QGSRUBBERBAND_H

#include "qgsmapcanvasitem.h"
#include "qgsgeometry.h"
#include <QBrush>
#include <QList>
#include <QPen>
#include <QPolygon>

class QgsVectorLayer;
class QPaintEvent;

class GUI_EXPORT QgsRubberBand: public QgsMapCanvasItem
{
  public:
    QgsRubberBand( QgsMapCanvas* mapCanvas, bool isPolygon = false );
    ~QgsRubberBand();

    void setColor( const QColor & color );
    void setWidth( int width );

    void reset( bool isPolygon = false );

    void addPoint( const QgsPoint & p, bool update = true, int geometryIndex = 0 );

    void removeLastPoint( int geometryIndex = 0 );

    void movePoint( const QgsPoint & p, int geometryIndex = 0 );
    void movePoint( int index, const QgsPoint& p, int geometryIndex = 0 );

    void setToGeometry( QgsGeometry* geom, QgsVectorLayer* layer );

    void setToCanvasRectangle( const QRect& rect );

    void addGeometry( QgsGeometry* geom, QgsVectorLayer* layer );

    void setTranslationOffset( double dx, double dy );

    int size() const;

    int numberOfVertices() const;

    const QgsPoint *getPoint( int i, int j = 0 ) const;

    QgsGeometry* asGeometry();

  protected:
    virtual void paint( QPainter* p );

    void updateRect();

  private:
    QBrush mBrush;
    QPen mPen;

    QList< QList <QgsPoint> > mPoints;
    bool mIsPolygon;
    double mTranslationOffsetX;
    double mTranslationOffsetY;

    QgsRubberBand();

    static QgsPolyline getPolyline( const QList<QgsPoint> & points );

};

#endif