include/wx/os2/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.h
   3 // Purpose:     wxDC class
   4 // Author:      AUTHOR
   5 // Modified by:
   6 // Created:     ??/??/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) AUTHOR
   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/pen.h"
  20 #include "wx/brush.h"
  21 #include "wx/icon.h"
  22 #include "wx/font.h"
  23 #include "wx/gdicmn.h"
  24
  25 //-----------------------------------------------------------------------------
  26 // constants
  27 //-----------------------------------------------------------------------------
  28
  29 #ifndef MM_TEXT
  30 #define MM_TEXT               0
  31 #define MM_ISOTROPIC          1
  32 #define MM_ANISOTROPIC        2
  33 #define MM_LOMETRIC           3
  34 #define MM_HIMETRIC           4
  35 #define MM_TWIPS              5
  36 #define MM_POINTS             6
  37 #define MM_METRIC             7
  38 #endif
  39
  40 //-----------------------------------------------------------------------------
  41 // global variables
  42 //-----------------------------------------------------------------------------
  43
  44 extern int wxPageNumber;
  45
  46 //-----------------------------------------------------------------------------
  47 // wxDC
  48 //-----------------------------------------------------------------------------
  49
  50 class WXDLLEXPORT wxDC: public wxDCBase
  51 {
  52   DECLARE_ABSTRACT_CLASS(wxDC)
  53
  54   public:
  55
  56     wxDC(void);
  57     ~wxDC(void);
  58
  59     virtual void BeginDrawing(void) { };
  60     virtual void EndDrawing(void) { };
  61
  62 //-----------------------------------------------------------------------------
  63 // Pure virtuals from wxDCBase that need defining
  64 //-----------------------------------------------------------------------------
  65     virtual bool   CanDrawBitmap(void) const { return TRUE; };
  66     virtual bool   CanGetTextExtent(void) const { return TRUE; };
  67     virtual int    GetDepth(void) const;
  68     virtual wxSize GetPPI(void) const;
  69     virtual void   GetTextExtent( const wxString& string
  70                                  ,long*           width
  71                                  ,long*           height
  72                                  ,long*           descent = NULL
  73                                  ,long*           externalLeading = NULL
  74                                  ,wxFont*         theFont = NULL
  75                                 ) const;
  76     virtual long   GetCharWidth(void) const;
  77     virtual long   GetCharHeight(void) const;
  78     virtual void   Clear(void);
  79     virtual void   SetFont(const wxFont& font);
  80     virtual void   SetPen(const wxPen& pen);
  81     virtual void   SetBrush(const wxBrush& brush);
  82     virtual void   SetBackground(const wxBrush& brush);
  83     virtual void   SetLogicalFunction(int function);
  84     virtual void   SetBackgroundMode(int mode);
  85     virtual void   SetPalette(const wxPalette& palette);
  86     virtual void   SetMapMode(int mode);
  87     virtual void   DestroyClippingRegion(void);
  88     virtual void   SetUserScale(double x, double y);
  89     virtual void   SetLogicalOrigin(long x, long y);
  90     virtual void   SetDeviceOrigin(long x, long y);
  91     virtual void   SetAxisOrientation(bool xLeftRight, bool yBottomUp);
  92
  93     virtual void   DoFloodFill( long x
  94                                ,long y
  95                                ,const wxColour& col
  96                                ,int style = wxFLOOD_SURFACE
  97                               );
  98     virtual bool   DoGetPixel(long x, long y, wxColour *col) const;
  99     virtual void   DoDrawPoint(long x, long y);
 100     virtual void   DoDrawLine(long x1, long y1, long x2, long y2);
 101     virtual void   DoDrawArc(long x1, long y1,
 102                              long x2, long y2,
 103                              long xc, long yc
 104                             );
 105     virtual void   DoDrawEllipticArc( long x, long y
 106                                      ,long w, long h
 107                                      ,double sa, double ea
 108                                     );
 109     virtual void   DoDrawRectangle(long x, long y, long width, long height);
 110     virtual void   DoDrawRoundedRectangle( long x, long y
 111                                           ,long width, long height
 112                                           ,double radius
 113                                          );
 114     virtual void   DoDrawEllipse(long x, long y, long width, long height);
 115     virtual void   DoCrossHair(long x, long y);
 116     virtual void   DoDrawIcon(const wxIcon& icon, long x, long y);
 117     virtual void   DoDrawBitmap( const wxBitmap &bmp
 118                                 ,long x, long y
 119                                 ,bool useMask = FALSE
 120                                );
 121     virtual void   DoDrawText(const wxString& text, long x, long y);
 122     virtual bool   DoBlit( long xdest, long ydest
 123                           ,long width, long height
 124                           ,wxDC *source
 125                           ,long xsrc, long ysrc
 126                           ,int rop = wxCOPY, bool useMask = FALSE
 127                          );
 128     virtual void   DoGetSize(int *width, int *height) const;
 129     virtual void   DoGetSizeMM(int* width, int* height) const;
 130     virtual void   DoDrawLines( int n, wxPoint points[]
 131                                ,long xoffset, long yoffset
 132                               );
 133     virtual void   DoDrawPolygon( int n, wxPoint points[]
 134                                  ,long xoffset, long yoffset
 135                                  ,int fillStyle = wxODDEVEN_RULE
 136                                 );
 137     virtual void   DoSetClippingRegionAsRegion(const wxRegion& region);
 138     virtual void   DoSetClippingRegion( long x, long y
 139                                        ,long width, long height
 140                                       );
 141 #if wxUSE_SPLINES
 142     virtual void DoDrawSpline(wxList *points);
 143 #endif
 144
 145 //-----------------------------------------------------------------------------
 146 // Other virtuals from wxDCBase that are overridden here
 147 //-----------------------------------------------------------------------------
 148
 149     virtual void SetLogicalScale( double x, double y );
 150
 151 //-----------------------------------------------------------------------------
 152 // Our own new stuff
 153 //-----------------------------------------------------------------------------
 154     virtual void SetInternalDeviceOrigin( long x, long y );
 155     virtual void GetInternalDeviceOrigin( long *x, long *y );
 156
 157 private:
 158
 159     void ComputeScaleAndOrigin(void);
 160     long XDEV2LOG(long x) const;
 161     long XDEV2LOGREL(long x) const;
 162     long YDEV2LOG(long y) const;
 163     long YDEV2LOGREL(long y) const;
 164     long XLOG2DEV(long x) const;
 165     long XLOG2DEVREL(long x) const;
 166     long YLOG2DEV(long y) const;
 167     long YLOG2DEVREL(long y) const;
 168
 169 #if WXWIN_COMPATIBILITY
 170     // function hiding warning supression
 171     virtual void   GetTextExtent( const wxString& string
 172                                  ,long*           width
 173                                  ,long*           height
 174                                  ,long*           descent = NULL
 175                                  ,long*           externalLeading = NULL
 176                                  ,wxFont*         theFont = NULL
 177                                  ,bool            use16 = FALSE
 178                                 ) const
 179     { wxDCBase::GetTextExtent(string, width, height, descent, externalLeading, theFont, use16); };
 180 #endif
 181
 182 protected:
 183
 184     // ------------------------------------------------------------------------
 185     // Some additional data we need
 186     // ------------------------------------------------------------------------
 187
 188     // Owner canvas and selected in bitmap (if bitmap is GDI object selected)
 189     wxWindow*         m_owner;
 190     wxBitmap*         m_bitmap;
 191
 192     // our HDC and its usage count: we only free it when the usage count drops
 193     // to 0
 194     WXHDC             m_hDC;
 195     int               m_hDCCount;
 196
 197     // Store all old GDI objects when do a SelectObject, so we can select them
 198     // back in (this unselecting user's objects) so we can safely delete the
 199     // DC.
 200     WXHBITMAP         m_oldBitmap;
 201     WXHPEN            m_oldPen;
 202     WXHBRUSH          m_oldBrush;
 203     WXHFONT           m_oldFont;
 204     WXHPALETTE        m_oldPalette;
 205 };
 206
 207 #endif
 208     // _WX_DC_H_