File indexing completed on 2024-12-08 05:08:32
0001 /*************************************************************************** 0002 * Copyright (C) 1999-2005 Trolltech AS * 0003 * Copyright (C) 2006 David Saxton <david@bluehaze.org> * 0004 * * 0005 * This file may be distributed and/or modified under the terms of the * 0006 * GNU General Public License version 2 as published by the Free * 0007 * Software Foundation * 0008 ***************************************************************************/ 0009 0010 #ifndef KTL_CANVASITEMS_H_ 0011 #define KTL_CANVASITEMS_H_ 0012 0013 #include "canvasitemlist.h" 0014 0015 #include <QBrush> 0016 #include <QObject> 0017 #include <QPen> 0018 #include <QPolygon> 0019 #include <QRect> 0020 0021 class QPainter; 0022 0023 class KtlQCanvasPolygonalItem; 0024 class KtlQCanvasRectangle; 0025 class KtlQCanvasPolygon; 0026 class KtlQCanvasEllipse; 0027 class KtlQCanvasLine; 0028 class KtlQCanvasChunk; 0029 class KtlQCanvas; 0030 class KtlQCanvasItem; 0031 class KtlQCanvasView; 0032 0033 class KtlQCanvasItemExtra; 0034 0035 class KtlQCanvasItem : public QObject 0036 { 0037 Q_OBJECT 0038 public: 0039 KtlQCanvasItem(KtlQCanvas *canvas); 0040 ~KtlQCanvasItem() override; 0041 0042 double x() const 0043 { 0044 return myx; 0045 } 0046 double y() const 0047 { 0048 return myy; 0049 } 0050 double z() const 0051 { 0052 return myz; 0053 } // (depth) 0054 0055 virtual void moveBy(double const dx, double const dy); 0056 void move(double const x, double const y); 0057 void setX(double a) 0058 { 0059 move(a, y()); 0060 } 0061 void setY(double a) 0062 { 0063 move(x(), a); 0064 } 0065 void setZ(double a); 0066 0067 virtual bool collidesWith(const KtlQCanvasItem *) const = 0; 0068 0069 KtlQCanvasItemList collisions(const bool exact /* NO DEFAULT */) const; 0070 0071 virtual void setCanvas(KtlQCanvas *); 0072 0073 virtual void draw(QPainter &) = 0; 0074 0075 void show(); 0076 void hide(); 0077 0078 virtual void setVisible(bool yes); 0079 bool isVisible() const 0080 { 0081 return vis; 0082 } 0083 virtual void setSelected(const bool yes); 0084 bool isSelected() const 0085 { 0086 return sel; 0087 } 0088 0089 virtual QRect boundingRect() const = 0; 0090 0091 KtlQCanvas *canvas() const 0092 { 0093 return cnv; 0094 } 0095 0096 virtual bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const = 0; 0097 0098 bool needRedraw() const 0099 { 0100 return m_bNeedRedraw; 0101 } 0102 void setNeedRedraw(const bool needRedraw) 0103 { 0104 m_bNeedRedraw = needRedraw; 0105 } 0106 0107 protected: 0108 void update() 0109 { 0110 changeChunks(); 0111 } 0112 0113 virtual QPolygon chunks() const; 0114 virtual void addToChunks(); 0115 virtual void removeFromChunks(); 0116 virtual void changeChunks(); 0117 0118 bool val; 0119 double myx, myy, myz; 0120 0121 private: 0122 KtlQCanvas *cnv; 0123 static KtlQCanvas *current_canvas; 0124 KtlQCanvasItemExtra *ext; 0125 KtlQCanvasItemExtra &extra(); 0126 bool m_bNeedRedraw; 0127 bool vis; 0128 bool sel; 0129 }; 0130 0131 class KtlQPolygonalProcessor; 0132 0133 class KtlQCanvasPolygonalItem : public KtlQCanvasItem 0134 { 0135 public: 0136 KtlQCanvasPolygonalItem(KtlQCanvas *canvas); 0137 ~KtlQCanvasPolygonalItem() override; 0138 0139 bool collidesWith(const KtlQCanvasItem *) const override; 0140 0141 virtual void setPen(const QPen &p); 0142 virtual void setBrush(const QBrush &b); 0143 0144 QPen pen() const 0145 { 0146 return pn; 0147 } 0148 QBrush brush() const 0149 { 0150 return br; 0151 } 0152 0153 virtual QPolygon areaPoints() const = 0; 0154 QRect boundingRect() const override; 0155 0156 protected: 0157 void draw(QPainter &) override; 0158 virtual void drawShape(QPainter &) = 0; 0159 0160 bool winding() const; 0161 void setWinding(bool); 0162 0163 void invalidate(); 0164 bool isValid() const 0165 { 0166 return val; 0167 } 0168 0169 private: 0170 void scanPolygon(const QPolygon &pa, int winding, KtlQPolygonalProcessor &process) const; 0171 0172 QPolygon chunks() const override; 0173 0174 bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const override; 0175 0176 QBrush br; 0177 QPen pn; 0178 bool wind; 0179 }; 0180 0181 class KtlQCanvasRectangle : public KtlQCanvasPolygonalItem 0182 { 0183 public: 0184 KtlQCanvasRectangle(KtlQCanvas *canvas); 0185 KtlQCanvasRectangle(const QRect &, KtlQCanvas *canvas); 0186 KtlQCanvasRectangle(int x, int y, int width, int height, KtlQCanvas *canvas); 0187 0188 ~KtlQCanvasRectangle() override; 0189 0190 int width() const; 0191 int height() const; 0192 void setSize(const int w, const int h); 0193 QSize size() const 0194 { 0195 return QSize(w, h); 0196 } 0197 QPolygon areaPoints() const override; 0198 QRect rect() const 0199 { 0200 return QRect(int(x()), int(y()), w, h); 0201 } 0202 0203 bool collidesWith(const KtlQCanvasItem *) const override; 0204 0205 protected: 0206 void drawShape(QPainter &) override; 0207 QPolygon chunks() const override; 0208 0209 private: 0210 bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const override; 0211 0212 int w, h; 0213 }; 0214 0215 class KtlQCanvasPolygon : public KtlQCanvasPolygonalItem 0216 { 0217 public: 0218 KtlQCanvasPolygon(KtlQCanvas *canvas); 0219 ~KtlQCanvasPolygon() override; 0220 void setPoints(QPolygon); 0221 QPolygon points() const; 0222 void moveBy(double dx, double dy) override; 0223 0224 QPolygon areaPoints() const override; 0225 0226 protected: 0227 void drawShape(QPainter &) override; 0228 // TODO FIXME guarts are added for debugging memory corruption (poly takes non-pointer values) 0229 int guardBef[10]; 0230 QPolygon *poly; 0231 int guardAft[10]; 0232 }; 0233 0234 class KtlQCanvasLine : public KtlQCanvasPolygonalItem 0235 { 0236 public: 0237 KtlQCanvasLine(KtlQCanvas *canvas); 0238 ~KtlQCanvasLine() override; 0239 void setPoints(int x1, int y1, int x2, int y2); 0240 0241 QPoint startPoint() const 0242 { 0243 return QPoint(x1, y1); 0244 } 0245 QPoint endPoint() const 0246 { 0247 return QPoint(x2, y2); 0248 } 0249 0250 void setPen(const QPen &p) override; 0251 void moveBy(double dx, double dy) override; 0252 0253 protected: 0254 void drawShape(QPainter &) override; 0255 QPolygon areaPoints() const override; 0256 0257 private: 0258 int x1, y1, x2, y2; 0259 }; 0260 0261 class KtlQCanvasEllipse : public KtlQCanvasPolygonalItem 0262 { 0263 public: 0264 KtlQCanvasEllipse(KtlQCanvas *canvas); 0265 KtlQCanvasEllipse(int width, int height, KtlQCanvas *canvas); 0266 KtlQCanvasEllipse(int width, int height, int startangle, int angle, KtlQCanvas *canvas); 0267 0268 ~KtlQCanvasEllipse() override; 0269 0270 int width() const; 0271 int height() const; 0272 void setSize(int w, int h); 0273 void setAngles(int start, int length); 0274 int angleStart() const 0275 { 0276 return a1; 0277 } 0278 int angleLength() const 0279 { 0280 return a2; 0281 } 0282 QPolygon areaPoints() const override; 0283 0284 bool collidesWith(const KtlQCanvasItem *) const override; 0285 0286 protected: 0287 void drawShape(QPainter &) override; 0288 0289 private: 0290 bool collidesWith(const KtlQCanvasPolygonalItem *, const KtlQCanvasRectangle *, const KtlQCanvasEllipse *) const override; 0291 int w, h; 0292 int a1, a2; 0293 }; 0294 0295 #endif // KTL_CANVASITEMS_H_