include/wx/gtk1/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk1/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     virtual ~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     virtual GdkWindow* GetGDKWindow() const { return NULL; }
  70
  71     wxCoord XDEV2LOG(wxCoord x) const
  72     {
  73         wxCoord new_x = x - m_deviceOriginX;
  74         if (new_x > 0)
  75             return (wxCoord)((double)(new_x) / m_scaleX + 0.5) * m_signX + m_logicalOriginX;
  76         else
  77             return (wxCoord)((double)(new_x) / m_scaleX - 0.5) * m_signX + m_logicalOriginX;
  78     }
  79     wxCoord XDEV2LOGREL(wxCoord x) const
  80     {
  81         if (x > 0)
  82             return (wxCoord)((double)(x) / m_scaleX + 0.5);
  83         else
  84             return (wxCoord)((double)(x) / m_scaleX - 0.5);
  85     }
  86     wxCoord YDEV2LOG(wxCoord y) const
  87     {
  88         wxCoord new_y = y - m_deviceOriginY;
  89         if (new_y > 0)
  90             return (wxCoord)((double)(new_y) / m_scaleY + 0.5) * m_signY + m_logicalOriginY;
  91         else
  92             return (wxCoord)((double)(new_y) / m_scaleY - 0.5) * m_signY + m_logicalOriginY;
  93     }
  94     wxCoord YDEV2LOGREL(wxCoord y) const
  95     {
  96         if (y > 0)
  97             return (wxCoord)((double)(y) / m_scaleY + 0.5);
  98         else
  99             return (wxCoord)((double)(y) / m_scaleY - 0.5);
 100     }
 101     wxCoord XLOG2DEV(wxCoord x) const
 102     {
 103         wxCoord new_x = x - m_logicalOriginX;
 104         if (new_x > 0)
 105             return (wxCoord)((double)(new_x) * m_scaleX + 0.5) * m_signX + m_deviceOriginX;
 106         else
 107             return (wxCoord)((double)(new_x) * m_scaleX - 0.5) * m_signX + m_deviceOriginX;
 108     }
 109     wxCoord XLOG2DEVREL(wxCoord x) const
 110     {
 111         if (x > 0)
 112             return (wxCoord)((double)(x) * m_scaleX + 0.5);
 113         else
 114             return (wxCoord)((double)(x) * m_scaleX - 0.5);
 115     }
 116     wxCoord YLOG2DEV(wxCoord y) const
 117     {
 118         wxCoord new_y = y - m_logicalOriginY;
 119         if (new_y > 0)
 120             return (wxCoord)((double)(new_y) * m_scaleY + 0.5) * m_signY + m_deviceOriginY;
 121         else
 122             return (wxCoord)((double)(new_y) * m_scaleY - 0.5) * m_signY + m_deviceOriginY;
 123     }
 124     wxCoord YLOG2DEVREL(wxCoord y) const
 125     {
 126         if (y > 0)
 127             return (wxCoord)((double)(y) * m_scaleY + 0.5);
 128         else
 129             return (wxCoord)((double)(y) * m_scaleY - 0.5);
 130     }
 131
 132 protected:
 133     // base class pure virtuals implemented here
 134     virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 135     virtual void DoGetSizeMM(int* width, int* height) const;
 136
 137 public:
 138     // GTK-specific member variables
 139
 140     // not sure what for, but what is a mm on a screen you don't know the size
 141     // of?
 142     double       m_mm_to_pix_x,
 143                  m_mm_to_pix_y;
 144
 145     bool         m_needComputeScaleX,
 146                  m_needComputeScaleY; // not yet used
 147
 148
 149 private:
 150     DECLARE_ABSTRACT_CLASS(wxDC)
 151 };
 152
 153 // this must be defined when wxDC::Blit() honours the DC origian and needed to
 154 // allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
 155 // 2.3.[23]
 156 #ifndef wxHAS_WORKING_GTK_DC_BLIT
 157     #define wxHAS_WORKING_GTK_DC_BLIT
 158 #endif
 159
 160 #endif // __GTKDCH__