include/wx/msw/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.h
   3 // Purpose:     wxDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DC_H_
  13 #define _WX_DC_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "dc.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20 #include "wx/dc.h"
  21
  22 // ---------------------------------------------------------------------------
  23 // macros
  24 // ---------------------------------------------------------------------------
  25
  26 // Logical to device
  27 // Absolute
  28 #define XLOG2DEV(x) (x)
  29 #define YLOG2DEV(y) (y)
  30
  31 // Relative
  32 #define XLOG2DEVREL(x) (x)
  33 #define YLOG2DEVREL(y) (y)
  34
  35 // Device to logical
  36 // Absolute
  37 #define XDEV2LOG(x) (x)
  38
  39 #define YDEV2LOG(y) (y)
  40
  41 // Relative
  42 #define XDEV2LOGREL(x) (x)
  43 #define YDEV2LOGREL(y) (y)
  44
  45 /*
  46  * Have the same macros as for XView but not for every operation:
  47  * just for calculating window/viewport extent (a better way of scaling).
  48  */
  49
  50 // Logical to device
  51 // Absolute
  52 #define MS_XLOG2DEV(x) LogicalToDevice(x)
  53
  54 #define MS_YLOG2DEV(y) LogicalToDevice(y)
  55
  56 // Relative
  57 #define MS_XLOG2DEVREL(x) LogicalToDeviceXRel(x)
  58 #define MS_YLOG2DEVREL(y) LogicalToDeviceYRel(y)
  59
  60 // Device to logical
  61 // Absolute
  62 #define MS_XDEV2LOG(x) DeviceToLogicalX(x)
  63
  64 #define MS_YDEV2LOG(y) DeviceToLogicalY(y)
  65
  66 // Relative
  67 #define MS_XDEV2LOGREL(x) DeviceToLogicalXRel(x)
  68 #define MS_YDEV2LOGREL(y) DeviceToLogicalYRel(y)
  69
  70 #define YSCALE(y) (yorigin - (y))
  71
  72 #define     wx_round(a)    (int)((a)+.5)
  73
  74 class WXDLLEXPORT wxDC : public wxDCBase
  75 {
  76     DECLARE_DYNAMIC_CLASS(wxDC)
  77
  78 public:
  79     wxDC();
  80     ~wxDC();
  81
  82     // implement base class pure virtuals
  83     // ----------------------------------
  84
  85     virtual void Clear();
  86
  87     virtual bool StartDoc(const wxString& message);
  88     virtual void EndDoc();
  89
  90     virtual void StartPage();
  91     virtual void EndPage();
  92
  93     virtual void SetFont(const wxFont& font);
  94     virtual void SetPen(const wxPen& pen);
  95     virtual void SetBrush(const wxBrush& brush);
  96     virtual void SetBackground(const wxBrush& brush);
  97     virtual void SetBackgroundMode(int mode);
  98     virtual void SetPalette(const wxPalette& palette);
  99
 100     virtual void DestroyClippingRegion();
 101
 102     virtual long GetCharHeight() const;
 103     virtual long GetCharWidth() const;
 104     virtual void GetTextExtent(const wxString& string,
 105                                long *x, long *y,
 106                                long *descent = NULL,
 107                                long *externalLeading = NULL,
 108                                wxFont *theFont = NULL) const;
 109
 110     virtual bool CanDrawBitmap() const;
 111     virtual bool CanGetTextExtent() const;
 112     virtual int GetDepth() const;
 113     virtual wxSize GetPPI() const;
 114
 115     virtual void SetMapMode(int mode);
 116     virtual void SetUserScale(double x, double y);
 117     virtual void SetSystemScale(double x, double y);
 118     virtual void SetLogicalScale(double x, double y);
 119     virtual void SetLogicalOrigin(long x, long y);
 120     virtual void SetDeviceOrigin(long x, long y);
 121     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
 122     virtual void SetLogicalFunction(int function);
 123
 124     // implementation from now on
 125     // --------------------------
 126
 127     virtual void SetRop(WXHDC cdc);
 128     virtual void DoClipping(WXHDC cdc);
 129     virtual void SelectOldObjects(WXHDC dc);
 130
 131     wxWindow *GetWindow() const { return m_canvas; }
 132     void SetWindow(wxWindow *win) { m_canvas = win; }
 133
 134     WXHDC GetHDC() const { return m_hDC; }
 135     void SetHDC(WXHDC dc, bool bOwnsDC = FALSE)
 136     {
 137         m_hDC = dc;
 138         m_bOwnsDC = bOwnsDC;
 139     }
 140
 141 protected:
 142     virtual void DoFloodFill(long x, long y, const wxColour& col,
 143                              int style = wxFLOOD_SURFACE);
 144
 145     virtual bool DoGetPixel(long x, long y, wxColour *col) const;
 146
 147     virtual void DoDrawPoint(long x, long y);
 148     virtual void DoDrawLine(long x1, long y1, long x2, long y2);
 149
 150     virtual void DoDrawArc(long x1, long y1,
 151                            long x2, long y2,
 152                            long xc, long yc);
 153     virtual void DoDrawEllipticArc(long x, long y, long w, long h,
 154                                    double sa, double ea);
 155
 156     virtual void DoDrawRectangle(long x, long y, long width, long height);
 157     virtual void DoDrawRoundedRectangle(long x, long y,
 158                                         long width, long height,
 159                                         double radius);
 160     virtual void DoDrawEllipse(long x, long y, long width, long height);
 161
 162     virtual void DoCrossHair(long x, long y);
 163
 164     virtual void DoDrawIcon(const wxIcon& icon, long x, long y);
 165     virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
 166                               bool useMask = FALSE);
 167
 168     virtual void DoDrawText(const wxString& text, long x, long y);
 169
 170     virtual bool DoBlit(long xdest, long ydest, long width, long height,
 171                         wxDC *source, long xsrc, long ysrc,
 172                         int rop = wxCOPY, bool useMask = FALSE);
 173
 174     // this is gnarly - we can't even call this function DoSetClippingRegion()
 175     // because of virtual function hiding
 176     virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
 177     virtual void DoSetClippingRegion(long x, long y,
 178                                      long width, long height);
 179     virtual void DoGetClippingRegion(long *x, long *y,
 180                                      long *width, long *height)
 181     {
 182         GetClippingBox(x, y, width, height);
 183     }
 184
 185     virtual void DoGetSize(int *width, int *height) const;
 186     virtual void DoGetSizeMM(int* width, int* height) const;
 187
 188     virtual void DoDrawLines(int n, wxPoint points[],
 189                              long xoffset, long yoffset);
 190     virtual void DoDrawPolygon(int n, wxPoint points[],
 191                                long xoffset, long yoffset,
 192                                int fillStyle = wxODDEVEN_RULE);
 193
 194 #if wxUSE_SPLINES
 195     virtual void DoDrawSpline(wxList *points);
 196 #endif // wxUSE_SPLINES
 197
 198     // MSW-specific member variables
 199     int               m_windowExtX;
 200     int               m_windowExtY;
 201
 202     // the window associated with this DC (may be NULL)
 203     wxWindow         *m_canvas;
 204
 205     wxBitmap          m_selectedBitmap;
 206
 207     // TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
 208     bool              m_bOwnsDC:1;
 209
 210     // our HDC and its usage count: we only free it when the usage count drops
 211     // to 0
 212     WXHDC             m_hDC;
 213     int               m_hDCCount;
 214
 215     // Store all old GDI objects when do a SelectObject, so we can select them
 216     // back in (this unselecting user's objects) so we can safely delete the
 217     // DC.
 218     WXHBITMAP         m_oldBitmap;
 219     WXHPEN            m_oldPen;
 220     WXHBRUSH          m_oldBrush;
 221     WXHFONT           m_oldFont;
 222     WXHPALETTE        m_oldPalette;
 223 };
 224
 225 #endif
 226     // _WX_DC_H_