/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * 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; version 2 of the License

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#ifndef DRAWMAPSCENE_H

#define DRAWMAPSCENE_H

#include <QGraphicsScene>

#include <QPainterPath>

#include <QGraphicsEllipseItem>

#define DRAWN_MAP_BRUSH_SIZE_STEP (10)

#define DRAWN_MAP_BRUSH_SIZE_MAX (516)

#define DRAWN_MAP_BRUSH_SIZE_MIN (16)

#define DRAWN_MAP_BRUSH_SIZE_START (76)

class QGraphicsPathItem;

struct PathParams

{

    quint8 width;

    bool erasing;

    QPoint initialPoint;

    QList<QPoint> points;

};

typedef QList<PathParams> Paths;

class DrawMapScene : public QGraphicsScene

{

        Q_OBJECT

    public:

        enum PathType {

            Polyline  = 0,

            Rectangle = 1,

            Ellipse   = 2

        };

        explicit DrawMapScene(QObject *parent = 0);

        QByteArray encode();

        void decode(QByteArray data);

        int pointsCount();

        int brushSize();

    signals:

        void pathChanged();

        void brushSizeChanged(int brushSize);

    public slots:

        void undo();

        void clearMap();

        void simplifyLast();

        void optimize();

        void setErasing(bool erasing);

        void showCursor();

        void hideCursor();

        void setPathType(PathType pathType);

        void setBrushSize(int brushSize);

    private:

        QPen m_pen;

        QBrush m_eraser;

        QBrush m_brush;

        QGraphicsPathItem  * m_currPath;

        Paths paths;

        Paths oldPaths;

        bool m_isErasing;

        QList<QGraphicsItem *> oldItems;

        QGraphicsEllipseItem * m_cursor;

        bool m_isCursorShown;

        QByteArray m_specialPoints;

        PathType m_pathType;

        virtual void mouseMoveEvent(QGraphicsSceneMouseEvent * mouseEvent);

        virtual void mousePressEvent(QGraphicsSceneMouseEvent * mouseEvent);

        virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent * mouseEvent);

        virtual void wheelEvent(QGraphicsSceneWheelEvent *);

        QPainterPath pointsToPath(const QList<QPoint> points);

        quint8 serializePenWidth(int width);

        int deserializePenWidth(quint8 width);

        QList<QPointF> makeEllipse(const QPointF & center, const QPointF & corner);

        QPointF putSomeConstraints(const QPointF & initialPoint, const QPointF & point);

};

#endif // DRAWMAPSCENE_H