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 #include "wx/pen.h"
  16 #include "wx/brush.h"
  17 #include "wx/icon.h"
  18 #include "wx/font.h"
  19 #include "wx/gdicmn.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // constants
  23 //-----------------------------------------------------------------------------
  24
  25 #ifndef MM_TEXT
  26 #define MM_TEXT         0
  27 #define MM_ISOTROPIC    1
  28 #define MM_ANISOTROPIC  2
  29 #define MM_LOMETRIC     3
  30 #define MM_HIMETRIC     4
  31 #define MM_TWIPS        5
  32 #define MM_POINTS       6
  33 #define MM_METRIC       7
  34 #endif
  35
  36 //-----------------------------------------------------------------------------
  37 // wxDC
  38 //-----------------------------------------------------------------------------
  39
  40 class WXDLLEXPORT wxDC : public wxDCBase
  41 {
  42 public:
  43     wxDC();
  44     virtual ~wxDC() { }
  45
  46     // implement base class pure virtuals
  47     // ----------------------------------
  48
  49     virtual wxSize GetPPI() const;
  50
  51     virtual void SetMapMode(int mode);
  52     virtual void SetUserScale(double x, double y);
  53     virtual void SetLogicalScale(double x, double y);
  54     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
  55     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
  56     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
  57
  58 protected:
  59     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
  60         wxCoord width, wxCoord height);
  61     virtual void DoGetSizeMM(int* width, int* height) const;
  62
  63 public:
  64     virtual void ComputeScaleAndOrigin();
  65
  66     wxCoord XDEV2LOG(wxCoord x) const
  67     {
  68         wxCoord new_x = x - m_deviceOriginX;
  69         if (new_x > 0)
  70             return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
  71         else
  72             return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
  73     }
  74     wxCoord XDEV2LOGREL(wxCoord x) const
  75     {
  76         if (x > 0)
  77             return (wxCoord)((double)(x) / m_scaleX + 0.5);
  78         else
  79             return (wxCoord)((double)(x) / m_scaleX - 0.5);
  80     }
  81     wxCoord YDEV2LOG(wxCoord y) const
  82     {
  83         wxCoord new_y = y - m_deviceOriginY;
  84         if (new_y > 0)
  85             return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
  86         else
  87             return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
  88     }
  89     wxCoord YDEV2LOGREL(wxCoord y) const
  90     {
  91         if (y > 0)
  92             return (wxCoord)((double)(y) / m_scaleY + 0.5);
  93         else
  94             return (wxCoord)((double)(y) / m_scaleY - 0.5);
  95     }
  96     wxCoord XLOG2DEV(wxCoord x) const
  97     {
  98         wxCoord new_x = x - m_logicalOriginX;
  99         if (new_x > 0)
 100             return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
 101         else
 102             return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
 103     }
 104     wxCoord XLOG2DEVREL(wxCoord x) const
 105     {
 106         if (x > 0)
 107             return (wxCoord)((double)(x) * m_scaleX + 0.5);
 108         else
 109             return (wxCoord)((double)(x) * m_scaleX - 0.5);
 110     }
 111     wxCoord YLOG2DEV(wxCoord y) const
 112     {
 113         wxCoord new_y = y - m_logicalOriginY;
 114         if (new_y > 0)
 115             return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
 116         else
 117             return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
 118     }
 119     wxCoord YLOG2DEVREL(wxCoord y) const
 120     {
 121         if (y > 0)
 122             return (wxCoord)((double)(y) * m_scaleY + 0.5);
 123         else
 124             return (wxCoord)((double)(y) * m_scaleY - 0.5);
 125     }
 126
 127 public:
 128     // not sure what for, but what is a mm on a screen you don't know the size of?
 129     double       m_mm_to_pix_x,m_mm_to_pix_y;
 130
 131     // recompute scale?
 132     bool         m_needComputeScaleX, m_needComputeScaleY;
 133
 134
 135 private:
 136     DECLARE_ABSTRACT_CLASS(wxDC)
 137 };
 138
 139 #endif
 140 // _WX_DC_H_