File indexing completed on 2024-12-08 08:10:35

 /***************************************************************************
  *   Copyright (C) 1999-2005 Trolltech AS                                  *
  *   Copyright (C) 2006 David Saxton <david@bluehaze.org>                  *
  *                                                                         *
  *   This file may be distributed and/or modified under the terms of the   *
  *   GNU General Public License version 2 as published by the Free         *
  *   Software Foundation                                                   *
  ***************************************************************************/
 
 #ifndef KTL_CANVASITEMS_H_
 #define KTL_CANVASITEMS_H_
 
 #include "canvasitemlist.h"
 
 #include <QBrush>
 #include <QObject>
 #include <QPen>
 #include <QPolygon>
 #include <QRect>
 
 class QPainter;
 
 class KtlQCanvasPolygonalItem;
 class KtlQCanvasRectangle;
 class KtlQCanvasPolygon;
 class KtlQCanvasEllipse;
 class KtlQCanvasLine;
 class KtlQCanvasChunk;
 class KtlQCanvas;
 class KtlQCanvasItem;
 class KtlQCanvasView;
 
 class KtlQCanvasItemExtra;
 
 class KtlQCanvasItem : public QObject
 {
     Q_OBJECT
 public:
     KtlQCanvasItem(KtlQCanvas *canvas);
     ~KtlQCanvasItem() override;
 
     double x() const
     {
         return myx;
     }
     double y() const
     {
         return myy;
     }
     double z() const
     {
         return myz;
     } // (depth)
 
     virtual void moveBy(double const dx, double const dy);
     void move(double const x, double const y);
     void setX(double a)
     {
         move(a, y());
     }
     void setY(double a)
     {
         move(x(), a);
     }
     void setZ(double a);
 
     virtual bool collidesWith(const KtlQCanvasItem *) const = 0;
 
     KtlQCanvasItemList collisions(const bool exact /* NO DEFAULT */) const;
 
     virtual void setCanvas(KtlQCanvas *);
 
     virtual void draw(QPainter &) = 0;
 
     void show();
     void hide();
 
     virtual void setVisible(bool yes);
     bool isVisible() const
     {
         return vis;
     }
     virtual void setSelected(const bool yes);
     bool isSelected() const
     {
         return sel;
     }
 
     virtual QRect boundingRect() const = 0;
 
     KtlQCanvas *canvas() const
     {
         return cnv;
     }
 
     virtual bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const = 0;
 
     bool needRedraw() const
     {
         return m_bNeedRedraw;
     }
     void setNeedRedraw(const bool needRedraw)
     {
         m_bNeedRedraw = needRedraw;
     }
 
 protected:
     void update()
     {
         changeChunks();
     }
 
     virtual QPolygon chunks() const;
     virtual void addToChunks();
     virtual void removeFromChunks();
     virtual void changeChunks();
 
     bool val;
     double myx, myy, myz;
 
 private:
     KtlQCanvas *cnv;
     static KtlQCanvas *current_canvas;
     KtlQCanvasItemExtra *ext;
     KtlQCanvasItemExtra &extra();
     bool m_bNeedRedraw;
     bool vis;
     bool sel;
 };
 
 class KtlQPolygonalProcessor;
 
 class KtlQCanvasPolygonalItem : public KtlQCanvasItem
 {
 public:
     KtlQCanvasPolygonalItem(KtlQCanvas *canvas);
     ~KtlQCanvasPolygonalItem() override;
 
     bool collidesWith(const KtlQCanvasItem *) const override;
 
     virtual void setPen(const QPen &p);
     virtual void setBrush(const QBrush &b);
 
     QPen pen() const
     {
         return pn;
     }
     QBrush brush() const
     {
         return br;
     }
 
     virtual QPolygon areaPoints() const = 0;
     QRect boundingRect() const override;
 
 protected:
     void draw(QPainter &) override;
     virtual void drawShape(QPainter &) = 0;
 
     bool winding() const;
     void setWinding(bool);
 
     void invalidate();
     bool isValid() const
     {
         return val;
     }
 
 private:
     void scanPolygon(const QPolygon &pa, int winding, KtlQPolygonalProcessor &process) const;
 
     QPolygon chunks() const override;
 
     bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const override;
 
     QBrush br;
     QPen pn;
     bool wind;
 };
 
 class KtlQCanvasRectangle : public KtlQCanvasPolygonalItem
 {
 public:
     KtlQCanvasRectangle(KtlQCanvas *canvas);
     KtlQCanvasRectangle(const QRect &, KtlQCanvas *canvas);
     KtlQCanvasRectangle(int x, int y, int width, int height, KtlQCanvas *canvas);
 
     ~KtlQCanvasRectangle() override;
 
     int width() const;
     int height() const;
     void setSize(const int w, const int h);
     QSize size() const
     {
         return QSize(w, h);
     }
     QPolygon areaPoints() const override;
     QRect rect() const
     {
         return QRect(int(x()), int(y()), w, h);
     }
 
     bool collidesWith(const KtlQCanvasItem *) const override;
 
 protected:
     void drawShape(QPainter &) override;
     QPolygon chunks() const override;
 
 private:
     bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const override;
 
     int w, h;
 };
 
 class KtlQCanvasPolygon : public KtlQCanvasPolygonalItem
 {
 public:
     KtlQCanvasPolygon(KtlQCanvas *canvas);
     ~KtlQCanvasPolygon() override;
     void setPoints(QPolygon);
     QPolygon points() const;
     void moveBy(double dx, double dy) override;
 
     QPolygon areaPoints() const override;
 
 protected:
     void drawShape(QPainter &) override;
     // TODO FIXME guarts are added for debugging memory corruption (poly takes non-pointer values)
     int guardBef[10];
     QPolygon *poly;
     int guardAft[10];
 };
 
 class KtlQCanvasLine : public KtlQCanvasPolygonalItem
 {
 public:
     KtlQCanvasLine(KtlQCanvas *canvas);
     ~KtlQCanvasLine() override;
     void setPoints(int x1, int y1, int x2, int y2);
 
     QPoint startPoint() const
     {
         return QPoint(x1, y1);
     }
     QPoint endPoint() const
     {
         return QPoint(x2, y2);
     }
 
     void setPen(const QPen &p) override;
     void moveBy(double dx, double dy) override;
 
 protected:
     void drawShape(QPainter &) override;
     QPolygon areaPoints() const override;
 
 private:
     int x1, y1, x2, y2;
 };
 
 class KtlQCanvasEllipse : public KtlQCanvasPolygonalItem
 {
 public:
     KtlQCanvasEllipse(KtlQCanvas *canvas);
     KtlQCanvasEllipse(int width, int height, KtlQCanvas *canvas);
     KtlQCanvasEllipse(int width, int height, int startangle, int angle, KtlQCanvas *canvas);
 
     ~KtlQCanvasEllipse() override;
 
     int width() const;
     int height() const;
     void setSize(int w, int h);
     void setAngles(int start, int length);
     int angleStart() const
     {
         return a1;
     }
     int angleLength() const
     {
         return a2;
     }
     QPolygon areaPoints() const override;
 
     bool collidesWith(const KtlQCanvasItem *) const override;
 
 protected:
     void drawShape(QPainter &) override;
 
 private:
     bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const override;
     int w, h;
     int a1, a2;
 };
 
 #endif // KTL_CANVASITEMS_H_