1 /* 2 * Copyright 2006-2007, Haiku. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Stephan Aßmus <superstippi@gmx.de> 7 */ 8 #ifndef VECTOR_PATH_H 9 #define VECTOR_PATH_H 10 11 12 #include "IconBuild.h" 13 #include "Transformable.h" 14 15 #include <agg_path_storage.h> 16 17 #include <Rect.h> 18 #include <String.h> 19 20 #ifdef ICON_O_MATIC 21 # include "IconObject.h" 22 23 # include <Archivable.h> 24 # include <List.h> 25 #endif // ICON_O_MATIC 26 27 class BBitmap; 28 class BMessage; 29 class BView; 30 31 32 _BEGIN_ICON_NAMESPACE 33 34 35 struct control_point { 36 BPoint point; // actual point on path 37 BPoint point_in; // control point for incomming curve 38 BPoint point_out; // control point for outgoing curve 39 bool connected; // if all 3 points should be on one line 40 }; 41 42 #ifdef ICON_O_MATIC 43 class PathListener { 44 public: 45 PathListener(); 46 virtual ~PathListener(); 47 48 virtual void PointAdded(int32 index) = 0; 49 virtual void PointRemoved(int32 index) = 0; 50 virtual void PointChanged(int32 index) = 0; 51 virtual void PathChanged() = 0; 52 virtual void PathClosedChanged() = 0; 53 virtual void PathReversed() = 0; 54 }; 55 56 class VectorPath : public BArchivable, 57 public IconObject { 58 #else 59 class VectorPath { 60 #endif // ICON_O_MATIC 61 public: 62 63 class Iterator { 64 public: 65 Iterator() {} 66 virtual ~Iterator() {} 67 68 virtual void MoveTo(BPoint point) = 0; 69 virtual void LineTo(BPoint point) = 0; 70 }; 71 72 VectorPath(); 73 VectorPath(const VectorPath& from); 74 VectorPath(BMessage* archive); 75 76 virtual ~VectorPath(); 77 78 #ifdef ICON_O_MATIC 79 // IconObject 80 virtual status_t Archive(BMessage* into, 81 bool deep = true) const; 82 83 virtual PropertyObject* MakePropertyObject() const; 84 virtual bool SetToPropertyObject( 85 const PropertyObject* object); 86 #else 87 inline void Notify() {} 88 #endif // ICON_O_MATIC 89 90 // VectorPath 91 VectorPath& operator=(const VectorPath& from); 92 // bool operator==(const VectorPath& from) const; 93 94 void MakeEmpty(); 95 96 bool AddPoint(BPoint point); 97 bool AddPoint(const BPoint& point, 98 const BPoint& pointIn, 99 const BPoint& pointOut, 100 bool connected); 101 bool AddPoint(BPoint point, int32 index); 102 103 bool RemovePoint(int32 index); 104 105 // modify existing points position 106 bool SetPoint(int32 index, BPoint point); 107 bool SetPoint(int32 index, BPoint point, 108 BPoint pointIn, 109 BPoint pointOut, 110 bool connected); 111 bool SetPointIn(int32 index, BPoint point); 112 bool SetPointOut(int32 index, BPoint point, 113 bool mirrorDist = false); 114 115 bool SetInOutConnected(int32 index, bool connected); 116 117 // query existing points position 118 bool GetPointAt(int32 index, BPoint& point) const; 119 bool GetPointInAt(int32 index, BPoint& point) const; 120 bool GetPointOutAt(int32 index, BPoint& point) const; 121 bool GetPointsAt(int32 index, 122 BPoint& point, 123 BPoint& pointIn, 124 BPoint& pointOut, 125 bool* connected = NULL) const; 126 127 int32 CountPoints() const; 128 129 #ifdef ICON_O_MATIC 130 // iterates over curve segments and returns 131 // the distance and index of the point that 132 // started the segment that is closest 133 bool GetDistance(BPoint point, 134 float* distance, int32* index) const; 135 136 // at curve segment indicated by "index", this 137 // function looks for the closest point 138 // directly on the curve and returns a "scale" 139 // that indicates the distance on the curve 140 // between [0..1] 141 bool FindBezierScale(int32 index, BPoint point, 142 double* scale) const; 143 // this function can be used to get a point 144 // directly on the segment indicated by "index" 145 // "scale" is on [0..1] indicating the distance 146 // from the start of the segment to the end 147 bool GetPoint(int32 index, double scale, 148 BPoint& point) const; 149 #endif // ICON_O_MATIC 150 151 void SetClosed(bool closed); 152 bool IsClosed() const 153 { return fClosed; } 154 155 BRect Bounds() const; 156 BRect ControlPointBounds() const; 157 158 void Iterate(Iterator* iterator, 159 float smoothScale = 1.0) const; 160 161 void CleanUp(); 162 void Reverse(); 163 void ApplyTransform(const Transformable& transform); 164 165 void PrintToStream() const; 166 167 bool GetAGGPathStorage(agg::path_storage& path) const; 168 169 #ifdef ICON_O_MATIC 170 bool AddListener(PathListener* listener); 171 bool RemoveListener(PathListener* listener); 172 int32 CountListeners() const; 173 PathListener* ListenerAtFast(int32 index) const; 174 #endif // ICON_O_MATIC 175 176 177 private: 178 BRect _Bounds() const; 179 void _SetPoint(int32 index, BPoint point); 180 void _SetPoint(int32 index, 181 const BPoint& point, 182 const BPoint& pointIn, 183 const BPoint& pointOut, 184 bool connected); 185 bool _SetPointCount(int32 count); 186 187 #ifndef ICON_O_MATIC 188 inline void _NotifyPointAdded(int32 index) const {} 189 inline void _NotifyPointChanged(int32 index) const {} 190 inline void _NotifyPointRemoved(int32 index) const {} 191 inline void _NotifyPathChanged() const {} 192 inline void _NotifyClosedChanged() const {} 193 inline void _NotifyPathReversed() const {} 194 #else 195 void _NotifyPointAdded(int32 index) const; 196 void _NotifyPointChanged(int32 index) const; 197 void _NotifyPointRemoved(int32 index) const; 198 void _NotifyPathChanged() const; 199 void _NotifyClosedChanged() const; 200 void _NotifyPathReversed() const; 201 202 BList fListeners; 203 #endif // ICON_O_MATIC 204 205 control_point* fPath; 206 bool fClosed; 207 208 int32 fPointCount; 209 int32 fAllocCount; 210 211 mutable BRect fCachedBounds; 212 }; 213 214 215 _END_ICON_NAMESPACE 216 217 218 #endif // VECTOR_PATH_H 219