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