basic.h

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

  // Finds all region names for this image (composite or simple).
  // Supply empty string list.
  virtual void FindRegionNames(wxStringList& list);

  virtual void ClearText(int regionId = 0);
  void RemoveLine(wxLineShape *line);

#if wxUSE_PROLOGIO
  // I/O
  virtual void WriteAttributes(wxExpr *clause);
  virtual void ReadAttributes(wxExpr *clause);

  // In case the object has constraints it needs to read in in a different pass
  inline virtual void ReadConstraints(wxExpr *WXUNUSED(clause), wxExprDatabase *WXUNUSED(database)) { };
  virtual void WriteRegions(wxExpr *clause);
  virtual void ReadRegions(wxExpr *clause);
#endif

  // Attachment code
  virtual bool GetAttachmentPosition(int attachment, double *x, double *y,
                                     int nth = 0, int no_arcs = 1, wxLineShape *line = NULL);
  virtual int GetNumberOfAttachments() const;
  virtual bool AttachmentIsValid(int attachment) const;
  virtual wxList& GetAttachments() { return m_attachmentPoints; }

  // Only get the attachment position at the _edge_ of the shape, ignoring
  // branching mode. This is used e.g. to indicate the edge of interest, not the point
  // on the attachment branch.
  virtual bool GetAttachmentPositionEdge(int attachment, double *x, double *y,
                                     int nth = 0, int no_arcs = 1, wxLineShape *line = NULL);

  // Assuming the attachment lies along a vertical or horizontal line,
  // calculate the position on that point.
  virtual wxRealPoint CalcSimpleAttachment(const wxRealPoint& pt1, const wxRealPoint& pt2,
    int nth, int noArcs, wxLineShape* line);

  // Returns true if pt1 <= pt2 in the sense that one point comes before another on an
  // edge of the shape.
  // attachmentPoint is the attachment point (= side) in question.
  virtual bool AttachmentSortTest(int attachmentPoint, const wxRealPoint& pt1, const wxRealPoint& pt2);

  virtual void EraseLinks(wxDC& dc, int attachment = -1, bool recurse = false);
  virtual void DrawLinks(wxDC& dc, int attachment = -1, bool recurse = false);

  virtual bool MoveLineToNewAttachment(wxDC& dc, wxLineShape *to_move,
                                       double x, double y);

  // Reorders the lines coming into the node image at this attachment
  // position, in the order in which they appear in linesToSort.
  virtual void SortLines(int attachment, wxList& linesToSort);

  // Apply an attachment ordering change
  void ApplyAttachmentOrdering(wxList& ordering);

  // Can override this to prevent or intercept line reordering.
  virtual void OnChangeAttachment(int attachment, wxLineShape* line, wxList& ordering);

  //// New banching attachment code, 24/9/98

  //
  //             |________|
  //                 | <- root
  //                 | <- neck
  // shoulder1 ->---------<- shoulder2
  //             | | | | |<- stem
  //                      <- branching attachment point N-1

  // This function gets the root point at the given attachment.
  virtual wxRealPoint GetBranchingAttachmentRoot(int attachment);

  // This function gets information about where branching connections go (calls GetBranchingAttachmentRoot)
  virtual bool GetBranchingAttachmentInfo(int attachment, wxRealPoint& root, wxRealPoint& neck,
    wxRealPoint& shoulder1, wxRealPoint& shoulder2);

  // n is the number of the adjoining line, from 0 to N-1 where N is the number of lines
  // at this attachment point.
  // attachmentPoint is where the arc meets the stem, and stemPoint is where the stem meets the
  // shoulder.
  virtual bool GetBranchingAttachmentPoint(int attachment, int n, wxRealPoint& attachmentPoint,
    wxRealPoint& stemPoint);

  // Get the number of lines at this attachment position.
  virtual int GetAttachmentLineCount(int attachment) const;

  // Draw the branches (not the actual arcs though)
  virtual void OnDrawBranches(wxDC& dc, int attachment, bool erase = false);
  virtual void OnDrawBranches(wxDC& dc, bool erase = false);

  // Branching attachment settings
  inline void SetBranchNeckLength(int len) { m_branchNeckLength = len; }
  inline int GetBranchNeckLength() const { return m_branchNeckLength; }

  inline void SetBranchStemLength(int len) { m_branchStemLength = len; }
  inline int GetBranchStemLength() const { return m_branchStemLength; }

  inline void SetBranchSpacing(int len) { m_branchSpacing = len; }
  inline int GetBranchSpacing() const { return m_branchSpacing; }

  // Further detail on branching style, e.g. blobs on interconnections
  inline void SetBranchStyle(long style) { m_branchStyle = style; }
  inline long GetBranchStyle() const { return m_branchStyle; }

  // Rotate the standard attachment point from physical (0 is always North)
  // to logical (0 -> 1 if rotated by 90 degrees)
  virtual int PhysicalToLogicalAttachment(int physicalAttachment) const;

  // Rotate the standard attachment point from logical
  // to physical (0 is always North)
  virtual int LogicalToPhysicalAttachment(int logicalAttachment) const;

  // This is really to distinguish between lines and other images.
  // For lines, want to pass drag to canvas, since lines tend to prevent
  // dragging on a canvas (they get in the way.)
  virtual bool Draggable() const { return true; }

  // Returns true if image is a descendant of this image
  bool HasDescendant(wxShape *image);

  // Creates a copy of this shape.
  wxShape *CreateNewCopy(bool resetMapping = true, bool recompute = true);

  // Does the copying for this object
  virtual void Copy(wxShape& copy);

  // Does the copying for this object, including copying event
  // handler data if any. Calls the virtual Copy function.
  void CopyWithHandler(wxShape& copy);

  // Rotate about the given axis by the given amount in radians.
  virtual void Rotate(double x, double y, double theta);
  virtual double GetRotation() const { return m_rotation; }
  virtual void SetRotation(double rotation) { m_rotation = rotation; }

  void ClearAttachments();

  // Recentres all the text regions for this object
  void Recentre(wxDC& dc);

  // Clears points from a list of wxRealPoints
  void ClearPointList(wxList& list);

  // Return pen or brush of the right colour for the background
  wxPen GetBackgroundPen();
  wxBrush GetBackgroundBrush();


 protected:
  wxShapeEvtHandler*    m_eventHandler;
  bool                  m_formatted;
  double                m_xpos, m_ypos;
  const wxPen*          m_pen;
  const wxBrush*        m_brush;
  wxFont*               m_font;
  wxColour              m_textColour;
  wxString              m_textColourName;
  wxShapeCanvas*        m_canvas;
  wxList                m_lines;
  wxList                m_text;
  wxList                m_controlPoints;
  wxList                m_regions;
  wxList                m_attachmentPoints;
  bool                  m_visible;
  bool                  m_disableLabel;
  long                  m_id;
  bool                  m_selected;
  bool                  m_highlighted;      // Different from selected: user-defined highlighting,
                                            // e.g. thick border.
  double                m_rotation;
  int                   m_sensitivity;
  bool                  m_draggable;
  int                   m_attachmentMode;   // 0 for no attachments, 1 if using normal attachments,
                                            // 2 for branching attachments
  bool                  m_spaceAttachments; // true if lines at one side should be spaced
  bool                  m_fixedWidth;
  bool                  m_fixedHeight;
  bool                  m_centreResize;    // Default is to resize keeping the centre constant (true)
  bool                  m_drawHandles;     // Don't draw handles if false, usually true
  wxList                m_children;      // In case it's composite
  wxShape*              m_parent;      // In case it's a child
  int                   m_formatMode;
  int                   m_shadowMode;
  const wxBrush*        m_shadowBrush;
  int                   m_shadowOffsetX;
  int                   m_shadowOffsetY;
  int                   m_textMarginX;    // Gap between text and border
  int                   m_textMarginY;
  wxString              m_regionName;
  bool                  m_maintainAspectRatio;
  int                   m_branchNeckLength;
  int                   m_branchStemLength;
  int                   m_branchSpacing;
  long                  m_branchStyle;
};

class WXDLLIMPEXP_OGL wxPolygonShape: public wxShape
{
 DECLARE_DYNAMIC_CLASS(wxPolygonShape)
 public:
  wxPolygonShape();
  ~wxPolygonShape();

  // Takes a list of wxRealPoints; each point is an OFFSET from the centre.
  // Deletes user's points in destructor.
  virtual void Create(wxList *points);
  virtual void ClearPoints();

  void GetBoundingBoxMin(double *w, double *h);
  void CalculateBoundingBox();
  bool GetPerimeterPoint(double x1, double y1,
                                 double x2, double y2,
                                 double *x3, double *y3);
  bool HitTest(double x, double y, int *attachment, double *distance);
  void SetSize(double x, double y, bool recursive = true);
  void OnDraw(wxDC& dc);
  void OnDrawOutline(wxDC& dc, double x, double y, double w, double h);

  // Control points ('handles') redirect control to the actual shape, to make it easier
  // to override sizing behaviour.
  virtual void OnSizingDragLeft(wxControlPoint* pt, bool draw, double x, double y, int keys=0, int attachment = 0);
  virtual void OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys=0, int attachment = 0);
  virtual void OnSizingEndDragLeft(wxControlPoint* pt, double x, double y, int keys=0, int attachment = 0);

  // A polygon should have a control point at each vertex,
  // with the option of moving the control points individually
  // to change the shape.
  void MakeControlPoints();
  void ResetControlPoints();

  // If we've changed the shape, must make the original
  // points match the working points
  void UpdateOriginalPoints();

  // Add a control point after the given point
  virtual void AddPolygonPoint(int pos = 0);

  // Delete a control point
  virtual void DeletePolygonPoint(int pos = 0);

  // Recalculates the centre of the polygon
  virtual void CalculatePolygonCentre();

#if wxUSE_PROLOGIO
  void WriteAttributes(wxExpr *clause);
  void ReadAttributes(wxExpr *clause);
#endif

  int GetNumberOfAttachments() const;
  bool GetAttachmentPosition(int attachment, double *x, double *y,
                                     int nth = 0, int no_arcs = 1, wxLineShape *line = NULL);
  bool AttachmentIsValid(int attachment) const;
  // Does the copying for this object
  void Copy(wxShape& copy);

  inline wxList *GetPoints() { return m_points; }
  inline wxList *GetOriginalPoints() { return m_originalPoints; }

  // Rotate about the given axis by the given amount in radians
  virtual void Rotate(double x, double y, double theta);

  double GetOriginalWidth() const { return m_originalWidth; }
  double GetOriginalHeight() const { return m_originalHeight; }

  void SetOriginalWidth(double w) { m_originalWidth = w; }
  void SetOriginalHeight(double h) { m_originalHeight = h; }

 private:
  wxList*       m_points;
  wxList*       m_originalPoints;
  double        m_boundWidth;
  double        m_boundHeight;
  double        m_originalWidth;
  double        m_originalHeight;
};

class WXDLLIMPEXP_OGL wxRectangleShape: public wxShape
{
 DECLARE_DYNAMIC_CLASS(wxRectangleShape)
 public:
  wxRectangleShape(double w = 0.0, double h = 0.0);
  void GetBoundingBoxMin(double *w, double *h);
  bool GetPerimeterPoint(double x1, double y1,
                                 double x2, double y2,
                                 double *x3, double *y3);
  void OnDraw(wxDC& dc);
  void SetSize(double x, double y, bool recursive = true);
  void SetCornerRadius(double rad); // If > 0, rounded corners
  double GetCornerRadius() const { return m_cornerRadius; }

#if wxUSE_PROLOGIO
  void WriteAttributes(wxExpr *clause);
  void ReadAttributes(wxExpr *clause);
#endif

  int GetNumberOfAttachments() const;
  bool GetAttachmentPosition(int attachment, double *x, double *y,
                                     int nth = 0, int no_arcs = 1, wxLineShape *line = NULL);
  // Does the copying for this object
  void Copy(wxShape& copy);

  inline double GetWidth() const { return m_width; }
  inline double GetHeight() const { return m_height; }
  inline void SetWidth(double w) { m_width = w; }
  inline void SetHeight(double h) { m_height = h; }

protected:
  double m_width;
  double m_height;
  double m_cornerRadius;
};

class WXDLLIMPEXP_OGL wxTextShape: public wxRectangleShape
{
 DECLARE_DYNAMIC_CLASS(wxTextShape)
 public:
  wxTextShape(double width = 0.0, double height = 0.0);

  void OnDraw(wxDC& dc);

#if wxUSE_PROLOGIO
    void WriteAttributes(wxExpr *clause);
#endif

  // Does the copying for this object
  void Copy(wxShape& copy);
};

class WXDLLIMPEXP_OGL wxEllipseShape: public wxShape
{
 DECLARE_DYNAMIC_CLASS(wxEllipseShape)
 public:
  wxEllipseShape(double w = 0.0, double h = 0.0);

  void GetBoundingBoxMin(double *w, double *h);
  bool GetPerimeterPoint(double x1, double y1,
                                 double x2, double y2,
                                 double *x3, double *y3);

  void OnDraw(wxDC& dc);
  void SetSize(double x, double y, bool recursive = true);

#if wxUSE_PROLOGIO
  void WriteAttributes(wxExpr *clause);
  void ReadAttributes(wxExpr *clause);
#endif

  int GetNumberOfAttachments() const;
  bool GetAttachmentPosition(int attachment, double *x, double *y,
                                     int nth = 0, int no_arcs = 1, wxLineShape *line = NULL);

  // Does the copying for this object
  void Copy(wxShape& copy);

  inline double GetWidth() const { return m_width; }
  inline double GetHeight() const { return m_height; }

  inline void SetWidth(double w) { m_width = w; }
  inline void SetHeight(double h) { m_height = h; }

protected:
  double m_width;
  double m_height;
};

class WXDLLIMPEXP_OGL wxCircleShape: public wxEllipseShape
{
 DECLARE_DYNAMIC_CLASS(wxCircleShape)
 public:
  wxCircleShape(double w = 0.0);

  bool GetPerimeterPoint(double x1, double y1,
                                 double x2, double y2,
                                 double *x3, double *y3);
  // Does the copying for this object
  void Copy(wxShape& copy);
};

#endif
 // _OGL_BASIC_H_