include/wx/dcgraph.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/dcgraph.h
   3 // Purpose:     graphics context device bridge header
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Stefan Csomor
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GRAPHICS_DC_H_
  13 #define _WX_GRAPHICS_DC_H_
  14
  15 #if wxUSE_GRAPHICS_CONTEXT
  16
  17 #include "wx/dc.h"
  18 #include "wx/geometry.h"
  19 #include "wx/graphics.h"
  20
  21 class WXDLLIMPEXP_FWD_CORE wxWindowDC;
  22
  23
  24 class WXDLLIMPEXP_CORE wxGCDC: public wxDC
  25 {
  26 public:
  27     wxGCDC( const wxWindowDC& dc );
  28     wxGCDC( const wxMemoryDC& dc );
  29 #if wxUSE_PRINTING_ARCHITECTURE
  30     wxGCDC( const wxPrinterDC& dc );
  31 #endif
  32 #if defined(__WXMSW__) && wxUSE_ENH_METAFILE
  33     wxGCDC( const wxEnhMetaFileDC& dc );
  34 #endif
  35     wxGCDC(wxGraphicsContext* context);
  36
  37     wxGCDC();
  38     virtual ~wxGCDC();
  39
  40     wxGraphicsContext* GetGraphicsContext() const;
  41     void SetGraphicsContext( wxGraphicsContext* ctx );
  42
  43 #ifdef __WXMSW__
  44     // override wxDC virtual functions to provide access to HDC associated with
  45     // this Graphics object (implemented in src/msw/graphics.cpp)
  46     virtual WXHDC AcquireHDC();
  47     virtual void ReleaseHDC(WXHDC hdc);
  48 #endif // __WXMSW__
  49
  50 private:
  51     DECLARE_DYNAMIC_CLASS(wxGCDC)
  52     wxDECLARE_NO_COPY_CLASS(wxGCDC);
  53 };
  54
  55
  56 class WXDLLIMPEXP_CORE wxGCDCImpl: public wxDCImpl
  57 {
  58 public:
  59     wxGCDCImpl( wxDC *owner, const wxWindowDC& dc );
  60     wxGCDCImpl( wxDC *owner, const wxMemoryDC& dc );
  61 #if wxUSE_PRINTING_ARCHITECTURE
  62     wxGCDCImpl( wxDC *owner, const wxPrinterDC& dc );
  63 #endif
  64 #if defined(__WXMSW__) && wxUSE_ENH_METAFILE
  65     wxGCDCImpl( wxDC *owner, const wxEnhMetaFileDC& dc );
  66 #endif
  67     wxGCDCImpl( wxDC *owner );
  68
  69     virtual ~wxGCDCImpl();
  70
  71     void Init();
  72
  73
  74     // implement base class pure virtuals
  75     // ----------------------------------
  76
  77     virtual void Clear();
  78
  79     virtual bool StartDoc( const wxString& message );
  80     virtual void EndDoc();
  81
  82     virtual void StartPage();
  83     virtual void EndPage();
  84
  85     // flushing the content of this dc immediately onto screen
  86     virtual void Flush();
  87
  88     virtual void SetFont(const wxFont& font);
  89     virtual void SetPen(const wxPen& pen);
  90     virtual void SetBrush(const wxBrush& brush);
  91     virtual void SetBackground(const wxBrush& brush);
  92     virtual void SetBackgroundMode(int mode);
  93     virtual void SetPalette(const wxPalette& palette);
  94
  95     virtual void DestroyClippingRegion();
  96
  97     virtual wxCoord GetCharHeight() const;
  98     virtual wxCoord GetCharWidth() const;
  99
 100     virtual bool CanDrawBitmap() const;
 101     virtual bool CanGetTextExtent() const;
 102     virtual int GetDepth() const;
 103     virtual wxSize GetPPI() const;
 104
 105     virtual void SetLogicalFunction(wxRasterOperationMode function);
 106
 107     virtual void SetTextForeground(const wxColour& colour);
 108     virtual void SetTextBackground(const wxColour& colour);
 109
 110     virtual void ComputeScaleAndOrigin();
 111
 112     wxGraphicsContext* GetGraphicsContext() const { return m_graphicContext; }
 113     virtual void SetGraphicsContext( wxGraphicsContext* ctx );
 114
 115     // the true implementations
 116     virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
 117                              wxFloodFillStyle style = wxFLOOD_SURFACE);
 118
 119     virtual void DoGradientFillLinear(const wxRect& rect,
 120         const wxColour& initialColour,
 121         const wxColour& destColour,
 122         wxDirection nDirection = wxEAST);
 123
 124     virtual void DoGradientFillConcentric(const wxRect& rect,
 125         const wxColour& initialColour,
 126         const wxColour& destColour,
 127         const wxPoint& circleCenter);
 128
 129     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
 130
 131     virtual void DoDrawPoint(wxCoord x, wxCoord y);
 132
 133 #if wxUSE_SPLINES
 134     virtual void DoDrawSpline(const wxPointList *points);
 135 #endif
 136
 137     virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
 138
 139     virtual void DoDrawArc(wxCoord x1, wxCoord y1,
 140         wxCoord x2, wxCoord y2,
 141         wxCoord xc, wxCoord yc);
 142
 143     virtual void DoDrawCheckMark(wxCoord x, wxCoord y,
 144         wxCoord width, wxCoord height);
 145
 146     virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 147         double sa, double ea);
 148
 149     virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 150     virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 151         wxCoord width, wxCoord height,
 152         double radius);
 153     virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 154
 155     virtual void DoCrossHair(wxCoord x, wxCoord y);
 156
 157     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
 158     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
 159         bool useMask = false);
 160
 161     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
 162     virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
 163         double angle);
 164
 165     virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 166                         wxDC *source, wxCoord xsrc, wxCoord ysrc,
 167                         wxRasterOperationMode rop = wxCOPY, bool useMask = false,
 168                         wxCoord xsrcMask = -1, wxCoord ysrcMask = -1);
 169
 170     virtual bool DoStretchBlit(wxCoord xdest, wxCoord ydest,
 171                                wxCoord dstWidth, wxCoord dstHeight,
 172                                wxDC *source,
 173                                wxCoord xsrc, wxCoord ysrc,
 174                                wxCoord srcWidth, wxCoord srcHeight,
 175                                wxRasterOperationMode = wxCOPY, bool useMask = false,
 176                                wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
 177
 178     virtual void DoGetSize(int *,int *) const;
 179     virtual void DoGetSizeMM(int* width, int* height) const;
 180
 181     virtual void DoDrawLines(int n, wxPoint points[],
 182         wxCoord xoffset, wxCoord yoffset);
 183     virtual void DoDrawPolygon(int n, wxPoint points[],
 184                                wxCoord xoffset, wxCoord yoffset,
 185                                wxPolygonFillMode fillStyle = wxODDEVEN_RULE);
 186     virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
 187                                    wxCoord xoffset, wxCoord yoffset,
 188                                    wxPolygonFillMode fillStyle);
 189
 190     virtual void DoSetDeviceClippingRegion(const wxRegion& region);
 191     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
 192         wxCoord width, wxCoord height);
 193
 194     virtual void DoGetTextExtent(const wxString& string,
 195         wxCoord *x, wxCoord *y,
 196         wxCoord *descent = NULL,
 197         wxCoord *externalLeading = NULL,
 198         const wxFont *theFont = NULL) const;
 199
 200     virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
 201
 202 #ifdef __WXMSW__
 203     virtual wxRect MSWApplyGDIPlusTransform(const wxRect& r) const;
 204 #endif // __WXMSW__
 205
 206 protected:
 207     // scaling variables
 208     bool m_logicalFunctionSupported;
 209     double       m_mm_to_pix_x, m_mm_to_pix_y;
 210     wxGraphicsMatrix m_matrixOriginal;
 211     wxGraphicsMatrix m_matrixCurrent;
 212
 213     double m_formerScaleX, m_formerScaleY;
 214
 215     wxGraphicsContext* m_graphicContext;
 216
 217     DECLARE_CLASS(wxGCDCImpl)
 218     wxDECLARE_NO_COPY_CLASS(wxGCDCImpl);
 219 };
 220
 221 #endif // wxUSE_GRAPHICS_CONTEXT
 222 #endif // _WX_GRAPHICS_DC_H_