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