utils/ogl/src/lines.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        lines.h
   3 // Purpose:     wxLineShape
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     12/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _OGL_LINES_H_
  13 #define _OGL_LINES_H_
  14
  15 #ifdef __GNUG__
  16 #pragma interface "lines.h"
  17 #endif
  18
  19 class wxLabelShape;
  20 class wxPseudoMetaFile;
  21 class wxLineControlPoint;
  22 /*
  23  * Arcs with multiple arrowheads
  24  *
  25  */
  26
  27 // Types of arrowhead
  28 // (i) Built-in
  29 #define ARROW_HOLLOW_CIRCLE   1
  30 #define ARROW_FILLED_CIRCLE   2
  31 #define ARROW_ARROW           3
  32 #define ARROW_SINGLE_OBLIQUE  4
  33 #define ARROW_DOUBLE_OBLIQUE  5
  34 // (ii) Custom
  35 #define ARROW_METAFILE        20
  36
  37 // Position of arrow on line
  38 #define ARROW_POSITION_START  0
  39 #define ARROW_POSITION_END    1
  40 #define ARROW_POSITION_MIDDLE 2
  41
  42 // Line alignment flags
  43 // Vertical by default
  44 #define LINE_ALIGNMENT_HORIZ              1
  45 #define LINE_ALIGNMENT_VERT               0
  46 #define LINE_ALIGNMENT_TO_NEXT_HANDLE     2
  47 #define LINE_ALIGNMENT_NONE               0
  48
  49 class wxArrowHead: public wxObject
  50 {
  51  DECLARE_DYNAMIC_CLASS(wxArrowHead)
  52
  53  public:
  54   wxArrowHead(WXTYPE type = 0, int end = 0, double size = 0.0, double dist = 0.0, const wxString& name = "", wxPseudoMetaFile *mf = NULL,
  55             long arrowId = -1);
  56   ~wxArrowHead();
  57   wxArrowHead(wxArrowHead& toCopy);
  58
  59   inline WXTYPE _GetType() const { return m_arrowType; }
  60   inline int GetPosition() const { return m_arrowEnd; }
  61   inline void SetPosition(int pos) { m_arrowEnd = pos; }
  62   inline double GetXOffset() const { return m_xOffset; }
  63   inline double GetYOffset() const { return m_yOffset; }
  64   inline double GetSpacing() const { return m_spacing; }
  65   inline double GetSize() const { return m_arrowSize; }
  66   inline wxString GetName() const { return m_arrowName; }
  67   inline void SetXOffset(double x) { m_xOffset = x; }
  68   inline void SetYOffset(double y) { m_yOffset = y; }
  69   inline wxPseudoMetaFile *GetMetaFile() const { return m_metaFile; }
  70   inline long GetId() const { return m_id; }
  71   inline int GetArrowEnd() const { return m_arrowEnd; }
  72   inline double GetArrowSize() const { return m_arrowSize; }
  73   void SetSize(double size);
  74   inline void SetSpacing(double sp) { m_spacing = sp; }
  75
  76  protected:
  77   WXTYPE            m_arrowType;
  78   int               m_arrowEnd;         // Position on line
  79   double             m_xOffset;          // Distance from arc start or end, w.r.t. point on arrowhead
  80                                         // nearest start or end. If zero, use default spacing.
  81   double             m_yOffset;          // vertical offset (w.r.t. a horizontal line). Normally zero.
  82   double             m_spacing;          // Spacing from the last arrowhead
  83   double             m_arrowSize;        // Length of arrowhead
  84   wxString          m_arrowName;        // Name of arrow
  85   bool              m_saveToFile;       // TRUE if we want to save custom arrowheads to file.
  86   wxPseudoMetaFile* m_metaFile;         // Pseudo metafile if this is a custom arrowhead
  87   long              m_id;               // identifier
  88 };
  89
  90 // Line object
  91 class wxLabelShape;
  92 class wxLineShape: public wxShape
  93 {
  94  DECLARE_DYNAMIC_CLASS(wxLineShape)
  95
  96  public:
  97   wxLineShape();
  98   ~wxLineShape();
  99
 100   // Called when a connected object has moved, to move the link to
 101   // correct position
 102   // moveControlPoints must be disabled when a control point is being
 103   // dragged.
 104   void OnMoveLink(wxDC& dc, bool moveControlPoints = TRUE);
 105   bool OnMovePre(wxDC& dc, double x, double y, double old_x, double old_y, bool display = TRUE);
 106   void OnDraw(wxDC& dc);
 107   void OnDrawContents(wxDC& dc);
 108   void OnDrawControlPoints(wxDC& dc);
 109   void OnEraseControlPoints(wxDC& dc);
 110   void OnErase(wxDC& dc);
 111   virtual bool OnMoveControlPoint(int WXUNUSED(which), double WXUNUSED(x), double WXUNUSED(y)) { return FALSE; }
 112   virtual bool OnMoveMiddleControlPoint(wxDC& dc, wxLineControlPoint* lpt, const wxRealPoint& pt);
 113   virtual bool OnLabelMovePre(wxDC& dc, wxLabelShape* labelShape, double x, double y, double old_x, double old_y, bool display);
 114   void OnDrawOutline(wxDC& dc, double x, double y, double w, double h);
 115   void GetBoundingBoxMin(double *w, double *h);
 116   void FormatText(wxDC& dc, const wxString& s, int regionId = 0);
 117   virtual void SetEnds(double x1, double y1, double x2, double y2);
 118   virtual void GetEnds(double *x1, double *y1, double *x2, double *y2);
 119   inline virtual wxShape *GetFrom() { return m_from; }
 120   inline virtual wxShape *GetTo() { return m_to; }
 121   inline virtual int GetAttachmentFrom() { return m_attachmentFrom; }
 122   inline virtual int GetAttachmentTo() { return m_attachmentTo; }
 123
 124   virtual void SetFrom(wxShape *object);
 125   virtual void SetTo(wxShape *object);
 126   virtual void DrawArrows(wxDC& dc);
 127
 128   // Finds the x, y points at the two ends of the line.
 129   // This function can be used by e.g. line-routing routines to
 130   // get the actual points on the two node images where the lines will be drawn
 131   // to/from.
 132   void FindLineEndPoints(double *fromX, double *fromY, double *toX, double *toY);
 133
 134   // Format one region at this position
 135   void DrawRegion(wxDC& dc, wxShapeRegion *region, double x, double y);
 136
 137   // Erase one region at this position
 138   void EraseRegion(wxDC& dc, wxShapeRegion *region, double x, double y);
 139
 140   // Get the reference point for a label. Region x and y
 141   // are offsets from this.
 142   // position is 0 (middle), 1 (start), 2 (end)
 143   void GetLabelPosition(int position, double *x, double *y);
 144
 145   // Can override this to create a different class of label shape
 146   virtual wxLabelShape* OnCreateLabelShape(wxLineShape *parent = NULL, wxShapeRegion *region = NULL, double w = 0.0, double h = 0.0);
 147
 148   // Straighten verticals and horizontals
 149   virtual void Straighten(wxDC* dc = NULL);
 150
 151   // Not implemented
 152   inline void SetMaintainStraightLines(bool flag) { m_maintainStraightLines = flag; }
 153   inline bool GetMaintainStraightLines() const { return m_maintainStraightLines; }
 154
 155   // Make handle control points
 156   void MakeControlPoints();
 157   void ResetControlPoints();
 158
 159   // Make a given number of control points
 160   virtual void MakeLineControlPoints(int n);
 161   virtual wxNode *InsertLineControlPoint(wxDC* dc);
 162   virtual bool DeleteLineControlPoint();
 163   virtual void Initialise();
 164   inline wxList *GetLineControlPoints() { return m_lineControlPoints; }
 165
 166   // Override dragging behaviour - don't want to be able to drag lines!
 167   void OnDragLeft(bool draw, double x, double y, int keys=0, int attachment = 0);
 168   void OnBeginDragLeft(double x, double y, int keys=0, int attachment = 0);
 169   void OnEndDragLeft(double x, double y, int keys=0, int attachment = 0);
 170
 171   // Control points ('handles') redirect control to the actual shape, to make it easier
 172   // to override sizing behaviour.
 173   virtual void OnSizingDragLeft(wxControlPoint* pt, bool draw, double x, double y, int keys=0, int attachment = 0);
 174   virtual void OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys=0, int attachment = 0);
 175   virtual void OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int keys=0, int attachment = 0);
 176
 177   // Override select, to create/delete temporary label-moving objects
 178   void Select(bool select = TRUE, wxDC* dc = NULL);
 179
 180   // Set to spline (TRUE) or line (FALSE)
 181   inline void SetSpline(bool spl) { m_isSpline = spl; }
 182   inline bool IsSpline() const { return m_isSpline; }
 183
 184   void Unlink();
 185   void SetAttachments(int from_attach, int to_attach);
 186   inline void SetAttachmentFrom(int attach) { m_attachmentFrom = attach; }
 187   inline void SetAttachmentTo(int attach) { m_attachmentTo = attach; }
 188
 189   bool HitTest(double x, double y, int *attachment, double *distance);
 190
 191 #ifdef PROLOGIO
 192   // I/O
 193   virtual void WriteAttributes(wxExpr *clause);
 194   virtual void ReadAttributes(wxExpr *clause);
 195 #endif
 196
 197   virtual void FindNth(wxShape *image, int *nth, int *no_arcs, bool incoming);
 198
 199   // Find which position we're talking about at this (x, y).
 200   // Returns ARROW_POSITION_START, ARROW_POSITION_MIDDLE, ARROW_POSITION_END
 201   int FindLinePosition(double x, double y);
 202
 203   // This is really to distinguish between lines and other images.
 204   // For lines, want to pass drag to canvas, since lines tend to prevent
 205   // dragging on a canvas (they get in the way.)
 206   virtual bool Draggable() const { return FALSE; }
 207
 208   // Does the copying for this object
 209   void Copy(wxShape& copy);
 210
 211   // Add an arrowhead.
 212   wxArrowHead *AddArrow(WXTYPE type, int end = ARROW_POSITION_END,
 213                 double arrowSize = 10.0, double xOffset = 0.0, const wxString& name = "",
 214                 wxPseudoMetaFile *mf = NULL, long arrowId = -1);
 215
 216   // Add an arrowhead in the position indicated by the reference
 217   // list of arrowheads, which contains all legal arrowheads for this
 218   // line, in the correct order.
 219   // E.g. reference list:      a b c d e
 220   //      Current line list:   a d
 221   // Add c, then line list is: a c d
 222   // If no legal arrowhead position, return FALSE.
 223   // Assume reference list is for one end only, since it potentially defines
 224   // the ordering for any one of the 3 positions. So we don't check
 225   // the reference list for arrowhead position.
 226   bool AddArrowOrdered(wxArrowHead *arrow, wxList& referenceList, int end);
 227
 228   // Delete arrowhead(s)
 229   void ClearArrowsAtPosition(int end = -1);
 230   bool ClearArrow(const wxString& name);
 231   wxArrowHead *FindArrowHead(int position, const wxString& name);
 232   wxArrowHead *FindArrowHead(long arrowId);
 233   bool DeleteArrowHead(int position, const wxString& name);
 234   bool DeleteArrowHead(long arrowId);
 235   void DrawArrow(wxDC& dc, wxArrowHead *arrow, double xOffset, bool proportionalOffset);
 236   inline void SetIgnoreOffsets(bool ignore) { m_ignoreArrowOffsets = ignore; }
 237   inline wxList& GetArrows() const { return (wxList&) m_arcArrows; }
 238
 239   // Find horizontal width for drawing a line with
 240   // arrows in minimum space. Assume arrows at
 241   // END only
 242   double FindMinimumWidth();
 243
 244   // Set alignment flags. ALIGNMENT NOT IMPLEMENTED.
 245   void SetAlignmentOrientation(bool isEnd, bool isHoriz);
 246   void SetAlignmentType(bool isEnd, int alignType);
 247   bool GetAlignmentOrientation(bool isEnd);
 248   int GetAlignmentType(bool isEnd);
 249
 250   // Find next control point in line after the start/end point
 251   // (depending on whether the node object is at start or end)
 252   wxRealPoint *GetNextControlPoint(wxShape *nodeObject);
 253   inline bool IsEnd(wxShape *nodeObject) const { return (m_to == nodeObject); }
 254
 255 private:
 256   bool              m_erasing;              // flag to say whether we're erasing or drawing
 257                                             // this line (really so metafiles can draw a
 258                                             // blank rectangle)
 259   bool              m_ignoreArrowOffsets;   // Don't always want to draw arrowhead offsets
 260                                             // because they may not work on tool palettes (for example)
 261   bool              m_isSpline;
 262   bool              m_maintainStraightLines;
 263
 264 protected:
 265   // Temporary list of line segment orientations
 266   // so we know what direction the line is supposed to be dog-legging
 267   // in. The values are integer: 0 for vertical, 1 for horizontal.
 268   wxList            m_lineOrientations;
 269
 270   // Temporary pointers for start, middle and end label editing objects
 271   // (active only when the line is selected)
 272   wxLabelShape*     m_labelObjects[3];
 273
 274   // These define the segmented line - not to be confused with temporary control
 275   // points which appear when object is selected (although in this case they'll
 276   // probably be the same)
 277   wxList*           m_lineControlPoints;
 278
 279   double             m_arrowSpacing; // Separation between adjacent arrows
 280
 281   wxShape*          m_to;
 282   wxShape*          m_from;
 283
 284 /*
 285   double             m_actualTextWidth;  // Space the text takes up
 286   double             m_actualTextHeight; // (depends on text content unlike nodes)
 287 */
 288   int               m_attachmentTo;   // Attachment point at one end
 289   int               m_attachmentFrom; // Attachment point at other end
 290
 291   // Alignment flags
 292   int               m_alignmentStart;
 293   int               m_alignmentEnd;
 294
 295   wxList            m_arcArrows;
 296
 297 };
 298
 299 #endif
 300     // _OGL_LINES_H_