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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 wxSize GetPPI() const;
  56
  57     virtual void SetMapMode(int mode);
  58     virtual void SetUserScale(double x, double y);
  59     virtual void SetLogicalScale(double x, double y);
  60     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
  61     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
  62     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
  63
  64 protected:
  65     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
  66     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
  67         bool useMask = FALSE);
  68
  69     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
  70         wxCoord width, wxCoord height);
  71     virtual void DoGetSize(int *width, int *height) const;
  72     virtual void DoGetSizeMM(int* width, int* height) const;
  73
  74 public:
  75     void ComputeScaleAndOrigin();
  76
  77     wxCoord XDEV2LOG(wxCoord x) const
  78     {
  79         wxCoord new_x = x - m_deviceOriginX;
  80         if (new_x > 0)
  81             return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
  82         else
  83             return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
  84     }
  85     wxCoord XDEV2LOGREL(wxCoord x) const
  86     {
  87         if (x > 0)
  88             return (wxCoord)((double)(x) / m_scaleX + 0.5);
  89         else
  90             return (wxCoord)((double)(x) / m_scaleX - 0.5);
  91     }
  92     wxCoord YDEV2LOG(wxCoord y) const
  93     {
  94         wxCoord new_y = y - m_deviceOriginY;
  95         if (new_y > 0)
  96             return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
  97         else
  98             return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
  99     }
 100     wxCoord YDEV2LOGREL(wxCoord y) const
 101     {
 102         if (y > 0)
 103             return (wxCoord)((double)(y) / m_scaleY + 0.5);
 104         else
 105             return (wxCoord)((double)(y) / m_scaleY - 0.5);
 106     }
 107     wxCoord XLOG2DEV(wxCoord x) const
 108     {
 109         wxCoord new_x = x - m_logicalOriginX;
 110         if (new_x > 0)
 111             return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
 112         else
 113             return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
 114     }
 115     // Without device translation, for backing pixmap purposes
 116     wxCoord XLOG2DEV_2(wxCoord x) const
 117     {
 118         wxCoord new_x = x - m_logicalOriginX;
 119         if (new_x > 0)
 120             return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX;
 121         else
 122             return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX;
 123     }
 124     wxCoord XLOG2DEVREL(wxCoord x) const
 125     {
 126         if (x > 0)
 127             return (wxCoord)((double)(x) * m_scaleX + 0.5);
 128         else
 129             return (wxCoord)((double)(x) * m_scaleX - 0.5);
 130     }
 131     wxCoord YLOG2DEV(wxCoord y) const
 132     {
 133         wxCoord new_y = y - m_logicalOriginY;
 134         if (new_y > 0)
 135             return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
 136         else
 137             return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
 138     }
 139     // Without device translation, for backing pixmap purposes
 140     wxCoord YLOG2DEV_2(wxCoord y) const
 141     {
 142         wxCoord new_y = y - m_logicalOriginY;
 143         if (new_y > 0)
 144             return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY;
 145         else
 146             return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY;
 147     }
 148     wxCoord YLOG2DEVREL(wxCoord y) const
 149     {
 150         if (y > 0)
 151             return (wxCoord)((double)(y) * m_scaleY + 0.5);
 152         else
 153             return (wxCoord)((double)(y) * m_scaleY - 0.5);
 154     }
 155
 156 public:
 157     // not sure what for, but what is a mm on a screen you don't know the size of?
 158     double       m_mm_to_pix_x,m_mm_to_pix_y;
 159
 160     // recompute scale?
 161     bool         m_needComputeScaleX, m_needComputeScaleY;
 162
 163 };
 164
 165 #endif
 166 // _WX_DC_H_