include/wx/gtk/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk/dc.h
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef __GTKDCH__
  11 #define __GTKDCH__
  12
  13 //-----------------------------------------------------------------------------
  14 // classes
  15 //-----------------------------------------------------------------------------
  16
  17 class WXDLLIMPEXP_CORE wxDC;
  18
  19 //-----------------------------------------------------------------------------
  20 // constants
  21 //-----------------------------------------------------------------------------
  22
  23 #ifndef MM_TEXT
  24 #define MM_TEXT         0
  25 #define MM_ISOTROPIC    1
  26 #define MM_ANISOTROPIC  2
  27 #define MM_LOMETRIC     3
  28 #define MM_HIMETRIC     4
  29 #define MM_TWIPS        5
  30 #define MM_POINTS       6
  31 #define MM_METRIC       7
  32 #endif
  33
  34 //-----------------------------------------------------------------------------
  35 // wxDC
  36 //-----------------------------------------------------------------------------
  37
  38 class WXDLLIMPEXP_CORE wxDC : public wxDCBase
  39 {
  40 public:
  41     wxDC();
  42     ~wxDC() { }
  43
  44 #if wxUSE_PALETTE
  45     void SetColourMap( const wxPalette& palette ) { SetPalette(palette); };
  46 #endif // wxUSE_PALETTE
  47
  48     // Resolution in pixels per logical inch
  49     virtual wxSize GetPPI() const;
  50
  51     virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return true; }
  52     virtual void EndDoc() { }
  53     virtual void StartPage() { }
  54     virtual void EndPage() { }
  55
  56     virtual void SetMapMode( int mode );
  57     virtual void SetUserScale( double x, double y );
  58     virtual void SetLogicalScale( double x, double y );
  59     virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
  60     virtual void SetDeviceOrigin( wxCoord x, wxCoord y );
  61
  62     virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
  63
  64     // implementation
  65     // --------------
  66
  67     virtual void ComputeScaleAndOrigin();
  68
  69     wxCoord XDEV2LOG(wxCoord x) const
  70     {
  71         wxCoord new_x = x - m_deviceOriginX;
  72         if (new_x > 0)
  73             return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
  74         else
  75             return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
  76     }
  77     wxCoord XDEV2LOGREL(wxCoord x) const
  78     {
  79         if (x > 0)
  80             return (wxCoord)((double)(x) / m_scaleX + 0.5);
  81         else
  82             return (wxCoord)((double)(x) / m_scaleX - 0.5);
  83     }
  84     wxCoord YDEV2LOG(wxCoord y) const
  85     {
  86         wxCoord new_y = y - m_deviceOriginY;
  87         if (new_y > 0)
  88             return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
  89         else
  90             return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
  91     }
  92     wxCoord YDEV2LOGREL(wxCoord y) const
  93     {
  94         if (y > 0)
  95             return (wxCoord)((double)(y) / m_scaleY + 0.5);
  96         else
  97             return (wxCoord)((double)(y) / m_scaleY - 0.5);
  98     }
  99     wxCoord XLOG2DEV(wxCoord x) const
 100     {
 101         wxCoord new_x = x - m_logicalOriginX;
 102         if (new_x > 0)
 103             return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
 104         else
 105             return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
 106     }
 107     wxCoord XLOG2DEVREL(wxCoord x) const
 108     {
 109         if (x > 0)
 110             return (wxCoord)((double)(x) * m_scaleX + 0.5);
 111         else
 112             return (wxCoord)((double)(x) * m_scaleX - 0.5);
 113     }
 114     wxCoord YLOG2DEV(wxCoord y) const
 115     {
 116         wxCoord new_y = y - m_logicalOriginY;
 117         if (new_y > 0)
 118             return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
 119         else
 120             return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
 121     }
 122     wxCoord YLOG2DEVREL(wxCoord y) const
 123     {
 124         if (y > 0)
 125             return (wxCoord)((double)(y) * m_scaleY + 0.5);
 126         else
 127             return (wxCoord)((double)(y) * m_scaleY - 0.5);
 128     }
 129
 130 protected:
 131     // base class pure virtuals implemented here
 132     virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 133     virtual void DoGetSizeMM(int* width, int* height) const;
 134
 135 public:
 136     // GTK-specific member variables
 137
 138     // not sure what for, but what is a mm on a screen you don't know the size
 139     // of?
 140     double       m_mm_to_pix_x,
 141                  m_mm_to_pix_y;
 142
 143     bool         m_needComputeScaleX,
 144                  m_needComputeScaleY; // not yet used
 145
 146
 147 private:
 148     DECLARE_ABSTRACT_CLASS(wxDC)
 149 };
 150
 151 // this must be defined when wxDC::Blit() honours the DC origian and needed to
 152 // allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
 153 // 2.3.[23]
 154 #ifndef wxHAS_WORKING_GTK_DC_BLIT
 155     #define wxHAS_WORKING_GTK_DC_BLIT
 156 #endif
 157
 158 #endif // __GTKDCH__