include/wx/x11/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 public:
  47     wxDC();
  48     ~wxDC() { }
  49
  50     // implement base class pure virtuals
  51     // ----------------------------------
  52
  53     virtual wxSize GetPPI() const;
  54
  55     virtual void SetMapMode(int mode);
  56     virtual void SetUserScale(double x, double y);
  57     virtual void SetLogicalScale(double x, double y);
  58     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
  59     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
  60     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
  61
  62 protected:
  63     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
  64         wxCoord width, wxCoord height);
  65     virtual void DoGetSizeMM(int* width, int* height) const;
  66
  67 public:
  68     void ComputeScaleAndOrigin();
  69
  70     wxCoord XDEV2LOG(wxCoord x) const
  71     {
  72         wxCoord new_x = x - m_deviceOriginX;
  73         if (new_x > 0)
  74             return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
  75         else
  76             return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
  77     }
  78     wxCoord XDEV2LOGREL(wxCoord x) const
  79     {
  80         if (x > 0)
  81             return (wxCoord)((double)(x) / m_scaleX + 0.5);
  82         else
  83             return (wxCoord)((double)(x) / m_scaleX - 0.5);
  84     }
  85     wxCoord YDEV2LOG(wxCoord y) const
  86     {
  87         wxCoord new_y = y - m_deviceOriginY;
  88         if (new_y > 0)
  89             return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
  90         else
  91             return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
  92     }
  93     wxCoord YDEV2LOGREL(wxCoord y) const
  94     {
  95         if (y > 0)
  96             return (wxCoord)((double)(y) / m_scaleY + 0.5);
  97         else
  98             return (wxCoord)((double)(y) / m_scaleY - 0.5);
  99     }
 100     wxCoord XLOG2DEV(wxCoord x) const
 101     {
 102         wxCoord new_x = x - m_logicalOriginX;
 103         if (new_x > 0)
 104             return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
 105         else
 106             return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
 107     }
 108     wxCoord XLOG2DEVREL(wxCoord x) const
 109     {
 110         if (x > 0)
 111             return (wxCoord)((double)(x) * m_scaleX + 0.5);
 112         else
 113             return (wxCoord)((double)(x) * m_scaleX - 0.5);
 114     }
 115     wxCoord YLOG2DEV(wxCoord y) const
 116     {
 117         wxCoord new_y = y - m_logicalOriginY;
 118         if (new_y > 0)
 119             return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
 120         else
 121             return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
 122     }
 123     wxCoord YLOG2DEVREL(wxCoord y) const
 124     {
 125         if (y > 0)
 126             return (wxCoord)((double)(y) * m_scaleY + 0.5);
 127         else
 128             return (wxCoord)((double)(y) * m_scaleY - 0.5);
 129     }
 130
 131 public:
 132     // not sure what for, but what is a mm on a screen you don't know the size of?
 133     double       m_mm_to_pix_x,m_mm_to_pix_y;
 134
 135     // recompute scale?
 136     bool         m_needComputeScaleX, m_needComputeScaleY;
 137
 138
 139 private:
 140     DECLARE_ABSTRACT_CLASS(wxDC)
 141 };
 142
 143 #endif
 144 // _WX_DC_H_