QTfrontend/drawmapscene.h
author alfadur
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
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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 General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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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 General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#ifndef DRAWMAPSCENE_H
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#define DRAWMAPSCENE_H
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#include <QGraphicsScene>
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#include <QPainterPath>
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#include <QGraphicsEllipseItem>
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#define DRAWN_MAP_BRUSH_SIZE_STEP (10)
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#define DRAWN_MAP_BRUSH_SIZE_MAX (516)
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#define DRAWN_MAP_BRUSH_SIZE_MIN (16)
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#define DRAWN_MAP_BRUSH_SIZE_START (76)
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class QGraphicsPathItem;
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struct PathParams
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{
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    quint8 width;
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    bool erasing;
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    QPoint initialPoint;
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    QList<QPoint> points;
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};
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typedef QList<PathParams> Paths;
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class DrawMapScene : public QGraphicsScene
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{
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        Q_OBJECT
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    public:
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        enum PathType {
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            Polyline  = 0,
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            Rectangle = 1,
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            Ellipse   = 2
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        };
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        explicit DrawMapScene(QObject *parent = 0);
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        QByteArray encode();
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        void decode(QByteArray data);
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        int pointsCount();
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        int brushSize();
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    signals:
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        void pathChanged();
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        void brushSizeChanged(int brushSize);
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    public slots:
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        void undo();
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        void clearMap();
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        void simplifyLast();
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        void optimize();
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        void setErasing(bool erasing);
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        void showCursor();
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        void hideCursor();
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        void setPathType(PathType pathType);
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        void setBrushSize(int brushSize);
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    private:
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        QPen m_pen;
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        QBrush m_eraser;
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        QBrush m_brush;
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        QGraphicsPathItem  * m_currPath;
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        Paths paths;
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        Paths oldPaths;
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        bool m_isErasing;
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        QList<QGraphicsItem *> oldItems;
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        QGraphicsEllipseItem * m_cursor;
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        bool m_isCursorShown;
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        QByteArray m_specialPoints;
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        PathType m_pathType;
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        virtual void mouseMoveEvent(QGraphicsSceneMouseEvent * mouseEvent);
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        virtual void mousePressEvent(QGraphicsSceneMouseEvent * mouseEvent);
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        virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent * mouseEvent);
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        virtual void wheelEvent(QGraphicsSceneWheelEvent *);
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        QPainterPath pointsToPath(const QList<QPoint> points);
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        quint8 serializePenWidth(int width);
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        int deserializePenWidth(quint8 width);
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        QList<QPointF> makeEllipse(const QPointF & center, const QPointF & corner);
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        QPointF putSomeConstraints(const QPointF & initialPoint, const QPointF & point);
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};
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#endif // DRAWMAPSCENE_H