include/wx/motif/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.h
   3 // Purpose:     wxDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   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/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 // wxDC
  42 //-----------------------------------------------------------------------------
  43
  44 class WXDLLEXPORT wxDC : public wxDCBase
  45 {
  46     DECLARE_DYNAMIC_CLASS(wxDC)
  47
  48 public:
  49     wxDC();
  50     ~wxDC() { }
  51
  52     // implement base class pure virtuals
  53     // ----------------------------------
  54
  55     virtual void DestroyClippingRegion();
  56
  57     virtual wxSize GetPPI() const;
  58
  59     virtual void SetMapMode(int mode);
  60     virtual void SetUserScale(double x, double y);
  61     virtual void SetSystemScale(double x, double y);
  62     virtual void SetLogicalScale(double x, double y);
  63     virtual void SetLogicalOrigin(long x, long y);
  64     virtual void SetDeviceOrigin(long x, long y);
  65     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
  66     virtual void SetLogicalFunction(int function);
  67
  68 protected:
  69     virtual void DoDrawIcon(const wxIcon& icon, long x, long y);
  70     virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
  71                               bool useMask = FALSE);
  72
  73     virtual void DoSetClippingRegion(long x, long y,
  74                                      long width, long height);
  75     virtual void DoGetSize(int *width, int *height) const;
  76     virtual void DoGetSizeMM(int* width, int* height) const;
  77
  78 public:
  79     void ComputeScaleAndOrigin();
  80
  81     long XDEV2LOG(long x) const
  82     {
  83         long new_x = x - m_deviceOriginX;
  84         if (new_x > 0)
  85             return (long)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
  86         else
  87             return (long)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
  88     }
  89     long XDEV2LOGREL(long x) const
  90     {
  91         if (x > 0)
  92             return (long)((double)(x) / m_scaleX + 0.5);
  93         else
  94             return (long)((double)(x) / m_scaleX - 0.5);
  95     }
  96     long YDEV2LOG(long y) const
  97     {
  98         long new_y = y - m_deviceOriginY;
  99         if (new_y > 0)
 100             return (long)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
 101         else
 102             return (long)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
 103     }
 104     long YDEV2LOGREL(long y) const
 105     {
 106         if (y > 0)
 107             return (long)((double)(y) / m_scaleY + 0.5);
 108         else
 109             return (long)((double)(y) / m_scaleY - 0.5);
 110     }
 111     long XLOG2DEV(long x) const
 112     {
 113         long new_x = x - m_logicalOriginX;
 114         if (new_x > 0)
 115             return (long)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
 116         else
 117             return (long)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
 118     }
 119     // Without device translation, for backing pixmap purposes
 120     long XLOG2DEV_2(long x) const
 121     {
 122         long new_x = x - m_logicalOriginX;
 123         if (new_x > 0)
 124             return (long)((double)(new_x) * m_scaleX + 0.5) * m_signX;
 125         else
 126             return (long)((double)(new_x) * m_scaleX - 0.5) * m_signX;
 127     }
 128     long XLOG2DEVREL(long x) const
 129     {
 130         if (x > 0)
 131             return (long)((double)(x) * m_scaleX + 0.5);
 132         else
 133             return (long)((double)(x) * m_scaleX - 0.5);
 134     }
 135     long YLOG2DEV(long y) const
 136     {
 137         long new_y = y - m_logicalOriginY;
 138         if (new_y > 0)
 139             return (long)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
 140         else
 141             return (long)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
 142     }
 143     // Without device translation, for backing pixmap purposes
 144     long YLOG2DEV_2(long y) const
 145     {
 146         long new_y = y - m_logicalOriginY;
 147         if (new_y > 0)
 148             return (long)((double)(new_y) * m_scaleY + 0.5) * m_signY;
 149         else
 150             return (long)((double)(new_y) * m_scaleY - 0.5) * m_signY;
 151     }
 152     long YLOG2DEVREL(long y) const
 153     {
 154         if (y > 0)
 155             return (long)((double)(y) * m_scaleY + 0.5);
 156         else
 157             return (long)((double)(y) * m_scaleY - 0.5);
 158     }
 159
 160     void SetInternalDeviceOrigin( long x, long y );
 161     void GetInternalDeviceOrigin( long *x, long *y );
 162
 163 public:
 164     // not sure what for, but what is a mm on a screen you don't know the size of?
 165     double       m_mm_to_pix_x,m_mm_to_pix_y;
 166
 167     // If un-scrolled is non-zero or d.o. changes with scrolling. Set using
 168     // SetInternalDeviceOrigin().
 169     long         m_internalDeviceOriginX,m_internalDeviceOriginY;
 170
 171     // To be set by external classes such as wxScrolledWindow using
 172     // SetDeviceOrigin()
 173     long         m_externalDeviceOriginX,m_externalDeviceOriginY;
 174
 175     // recompute scale?
 176     bool         m_needComputeScaleX, m_needComputeScaleY;
 177
 178     // wxPSDC wants to have this. Will disappear.
 179     float        m_scaleFactor;
 180 };
 181
 182 #endif
 183     // _WX_DC_H_