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/*
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*
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* This file is part of QMapControl,
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* an open-source cross-platform map widget
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*
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* Copyright (C) 2007 - 2008 Kai Winter
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with QMapControl. If not, see <http://www.gnu.org/licenses/>.
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*
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* Contact e-mail: kaiwinter@gmx.de
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* Program URL   : http://qmapcontrol.sourceforge.net/
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*
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*/
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#ifndef LINESTRING_H
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#define LINESTRING_H
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#include "curve.h"
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namespace qmapcontrol
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{
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    //! A collection of Point objects to describe a line
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    /*!
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     * A LineString is a Curve with linear interpolation between Points. Each consecutive pair of Points defines a Line segment.
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     *  @author Kai Winter <kaiwinter@gmx.de>
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     */
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    class LineString : public Curve
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    {
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        Q_OBJECT
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    public:
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        LineString();
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        //! constructor
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        /*!
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         * The constructor of a LineString takes a list of Points to form a line.
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         * @param points a list of points
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         * @param name the name of the LineString
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         * @param pen a QPen can be used to modify the look of the line.
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         * @see http://doc.trolltech.com/4.3/qpen.html
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         */
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        LineString ( QList<Point*> const points, QString name = QString(), QPen* pen = 0 );
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        virtual ~LineString();
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        //! returns the points of the LineString
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        /*!
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         * @return  a list with the points of the LineString
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         */
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        QList<Point*>   points();
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        //! adds a point at the end of the LineString
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        /*!
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         * @param point the point which should be added to the LineString
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         */
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        void addPoint ( Point* point );
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        //! sets the given list as points of the LineString
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        /*!
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         * @param points the points which should be set for the LineString
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         */
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        void setPoints ( QList<Point*> points );
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        //! returns the number of Points the LineString consists of
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        /*!
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         * @return the number of the LineString´s Points
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         */
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        int numberOfPoints() const;
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        // virtual Geometry     Clone();
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        virtual QRectF boundingBox();
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        // virtual Point EndPoint();
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        // virtual Point StartPoint();
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        // virtual Point Value();
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        //! returns true if the LineString has Childs
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        /*!
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         * This is equal to: numberOfPoints() > 0
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         * @return true it the LineString has Childs (=Points)
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         * @see clickedPoints()
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         */
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        virtual bool hasPoints() const;
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        //! returns true if the LineString has clicked Points
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        /*!
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         * @return true if childs of a LineString were clicked
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         * @see clickedPoints()
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         */
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        virtual bool hasClickedPoints() const;
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        //! returns the clicked Points
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        /*!
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         * If a LineString was clicked it could be neccessary to figure out which of its points where clicked.
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         * Do do so the methods hasPoints() and clickedPoints() can be used.
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         * When a point is added to a LineString the Point becomes its child.
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         * It is possible (depending on the zoomfactor) to click more than one Point of a LineString, so this method returns a list.
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         * @return the clicked Points of the LineString
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         */
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        virtual QList<Geometry*> clickedPoints();
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    protected:
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        virtual bool Touches ( Geometry* geom, const MapAdapter* mapadapter );
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        virtual bool Touches ( Point* geom, const MapAdapter* mapadapter );
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        virtual void draw ( QPainter* painter, const MapAdapter* mapadapter, const QRect &screensize, const QPoint offset );
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    private:
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        QList<Point*>   vertices;
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        QList<Geometry*>        touchedPoints;
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    };
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}
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#endif