include/wx/os2/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.h
   3 // Purpose:     wxDC class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     08/26/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DC_H_
  13 #define _WX_DC_H_
  14
  15 #include "wx/defs.h"
  16 #include "wx/dc.h"
  17
  18 // ---------------------------------------------------------------------------
  19 // macros
  20 // ---------------------------------------------------------------------------
  21
  22 // Logical to device
  23 // Absolute
  24 #define XLOG2DEV(x) (x)
  25 #define YLOG2DEV(y) (y)
  26
  27 // Relative
  28 #define XLOG2DEVREL(x) (x)
  29 #define YLOG2DEVREL(y) (y)
  30
  31 // Device to logical
  32 // Absolute
  33 #define XDEV2LOG(x) (x)
  34
  35 #define YDEV2LOG(y) (y)
  36
  37 // Relative
  38 #define XDEV2LOGREL(x) (x)
  39 #define YDEV2LOGREL(y) (y)
  40
  41 /*
  42  * Have the same macros as for XView but not for every operation:
  43  * just for calculating window/viewport extent (a better way of scaling).
  44  */
  45
  46 // Logical to device
  47 // Absolute
  48 #define MS_XLOG2DEV(x) LogicalToDevice(x)
  49
  50 #define MS_YLOG2DEV(y) LogicalToDevice(y)
  51
  52 // Relative
  53 #define MS_XLOG2DEVREL(x) LogicalToDeviceXRel(x)
  54 #define MS_YLOG2DEVREL(y) LogicalToDeviceYRel(y)
  55
  56 // Device to logical
  57 // Absolute
  58 #define MS_XDEV2LOG(x) DeviceToLogicalX(x)
  59
  60 #define MS_YDEV2LOG(y) DeviceToLogicalY(y)
  61
  62 // Relative
  63 #define MS_XDEV2LOGREL(x) DeviceToLogicalXRel(x)
  64 #define MS_YDEV2LOGREL(y) DeviceToLogicalYRel(y)
  65
  66 #define YSCALE(y) (yorigin - (y))
  67
  68 #define     wx_round(a)    (int)((a)+.5)
  69
  70 class WXDLLEXPORT wxDC : public wxDCBase
  71 {
  72     DECLARE_DYNAMIC_CLASS(wxDC)
  73
  74 public:
  75     wxDC();
  76     ~wxDC();
  77
  78     // implement base class pure virtuals
  79     // ----------------------------------
  80
  81     virtual void Clear();
  82
  83     virtual bool StartDoc(const wxString& message);
  84     virtual void EndDoc();
  85
  86     virtual void StartPage();
  87     virtual void EndPage();
  88
  89     virtual void SetFont(const wxFont& font);
  90     virtual void SetPen(const wxPen& pen);
  91     virtual void SetBrush(const wxBrush& brush);
  92     virtual void SetBackground(const wxBrush& brush);
  93     virtual void SetBackgroundMode(int mode);
  94     virtual void SetPalette(const wxPalette& palette);
  95
  96     virtual void DestroyClippingRegion();
  97
  98     virtual long GetCharHeight() const;
  99     virtual long GetCharWidth() const;
 100     virtual void GetTextExtent(const wxString& string,
 101                                long *x, long *y,
 102                                long *descent = NULL,
 103                                long *externalLeading = NULL,
 104                                wxFont *theFont = NULL) const;
 105
 106     virtual bool CanDrawBitmap() const;
 107     virtual bool CanGetTextExtent() const;
 108     virtual int GetDepth() const;
 109     virtual wxSize GetPPI() const;
 110
 111     virtual void SetMapMode(int mode);
 112     virtual void SetUserScale(double x, double y);
 113     virtual void SetSystemScale(double x, double y);
 114     virtual void SetLogicalScale(double x, double y);
 115     virtual void SetLogicalOrigin(long x, long y);
 116     virtual void SetDeviceOrigin(long x, long y);
 117     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
 118     virtual void SetLogicalFunction(int function);
 119
 120     // implementation from now on
 121     // --------------------------
 122
 123     virtual void SetRop(WXHDC cdc);
 124     virtual void DoClipping(WXHDC cdc);
 125     virtual void SelectOldObjects(WXHDC dc);
 126
 127     wxWindow *GetWindow() const { return m_canvas; }
 128     void SetWindow(wxWindow *win) { m_canvas = win; }
 129
 130     WXHDC GetHDC() const { return m_hDC; }
 131     void SetHDC(WXHDC dc, bool bOwnsDC = FALSE)
 132     {
 133         m_hDC = dc;
 134         m_bOwnsDC = bOwnsDC;
 135     }
 136
 137 protected:
 138     virtual void DoFloodFill(long x, long y, const wxColour& col,
 139                              int style = wxFLOOD_SURFACE);
 140
 141     virtual bool DoGetPixel(long x, long y, wxColour *col) const;
 142
 143     virtual void DoDrawPoint(long x, long y);
 144     virtual void DoDrawLine(long x1, long y1, long x2, long y2);
 145
 146     virtual void DoDrawArc(long x1, long y1,
 147                            long x2, long y2,
 148                            long xc, long yc);
 149     virtual void DoDrawEllipticArc(long x, long y, long w, long h,
 150                                    double sa, double ea);
 151
 152     virtual void DoDrawRectangle(long x, long y, long width, long height);
 153     virtual void DoDrawRoundedRectangle(long x, long y,
 154                                         long width, long height,
 155                                         double radius);
 156     virtual void DoDrawEllipse(long x, long y, long width, long height);
 157
 158     virtual void DoCrossHair(long x, long y);
 159
 160     virtual void DoDrawIcon(const wxIcon& icon, long x, long y);
 161     virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
 162                               bool useMask = FALSE);
 163
 164     virtual void DoDrawText(const wxString& text, long x, long y);
 165
 166     virtual bool DoBlit(long xdest, long ydest, long width, long height,
 167                         wxDC *source, long xsrc, long ysrc,
 168                         int rop = wxCOPY, bool useMask = FALSE);
 169
 170     // this is gnarly - we can't even call this function DoSetClippingRegion()
 171     // because of virtual function hiding
 172     virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
 173     virtual void DoSetClippingRegion(long x, long y,
 174                                      long width, long height);
 175     virtual void DoGetClippingRegion(long *x, long *y,
 176                                      long *width, long *height)
 177     {
 178         GetClippingBox(x, y, width, height);
 179     }
 180
 181     virtual void DoGetSize(int *width, int *height) const;
 182     virtual void DoGetSizeMM(int* width, int* height) const;
 183
 184     virtual void DoDrawLines(int n, wxPoint points[],
 185                              long xoffset, long yoffset);
 186     virtual void DoDrawPolygon(int n, wxPoint points[],
 187                                long xoffset, long yoffset,
 188                                int fillStyle = wxODDEVEN_RULE);
 189
 190 #if wxUSE_SPLINES
 191     virtual void DoDrawSpline(wxList *points);
 192 #endif // wxUSE_SPLINES
 193
 194     // OS2-specific member variables
 195     int               m_windowExtX;
 196     int               m_windowExtY;
 197
 198     // the window associated with this DC (may be NULL)
 199     wxWindow         *m_canvas;
 200
 201     wxBitmap          m_selectedBitmap;
 202
 203     // TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
 204     bool              m_bOwnsDC:1;
 205
 206     // our HDC and its usage count: we only free it when the usage count drops
 207     // to 0
 208     WXHDC             m_hDC;
 209     int               m_hDCCount;
 210
 211     // Store all old GDI objects when do a SelectObject, so we can select them
 212     // back in (this unselecting user's objects) so we can safely delete the
 213     // DC.
 214     WXHBITMAP         m_oldBitmap;
 215     WXHPEN            m_oldPen;
 216     WXHBRUSH          m_oldBrush;
 217     WXHFONT           m_oldFont;
 218     WXHPALETTE        m_oldPalette;
 219 };
 220 #endif
 221     // _WX_DC_H_