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         return wxRound((double)(x - m_deviceOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
  69     }
  70     wxCoord XDEV2LOGREL(wxCoord x) const
  71     {
  72         return wxRound((double)(x) / m_scaleX);
  73     }
  74     wxCoord YDEV2LOG(wxCoord y) const
  75     {
  76         return wxRound((double)(y - m_deviceOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
  77     }
  78     wxCoord YDEV2LOGREL(wxCoord y) const
  79     {
  80         return wxRound((double)(y) / m_scaleY);
  81     }
  82     wxCoord XLOG2DEV(wxCoord x) const
  83     {
  84         return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX;
  85     }
  86     wxCoord XLOG2DEVREL(wxCoord x) const
  87     {
  88         return wxRound((double)(x) * m_scaleX);
  89     }
  90     wxCoord YLOG2DEV(wxCoord y) const
  91     {
  92         return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY;
  93     }
  94     wxCoord YLOG2DEVREL(wxCoord y) const
  95     {
  96         return wxRound((double)(y) * m_scaleY);
  97     }
  98
  99 public:
 100     // not sure what for, but what is a mm on a screen you don't know the size of?
 101     double       m_mm_to_pix_x,m_mm_to_pix_y;
 102
 103     // recompute scale?
 104     bool         m_needComputeScaleX, m_needComputeScaleY;
 105
 106
 107 private:
 108     DECLARE_ABSTRACT_CLASS(wxDC)
 109 };
 110
 111 #endif
 112 // _WX_DC_H_