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         return wxRound((double)(x - m_deviceOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
  74     }
  75     wxCoord XDEV2LOGREL(wxCoord x) const
  76     {
  77         return wxRound((double)(x) / m_scaleX);
  78     }
  79     wxCoord YDEV2LOG(wxCoord y) const
  80     {
  81         return wxRound((double)(y - m_deviceOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
  82     }
  83     wxCoord YDEV2LOGREL(wxCoord y) const
  84     {
  85         return wxRound((double)(y) / m_scaleY);
  86     }
  87     wxCoord XLOG2DEV(wxCoord x) const
  88     {
  89         return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX;
  90     }
  91     wxCoord XLOG2DEVREL(wxCoord x) const
  92     {
  93         return wxRound((double)(x) * m_scaleX);
  94     }
  95     wxCoord YLOG2DEV(wxCoord y) const
  96     {
  97         return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY;
  98     }
  99     wxCoord YLOG2DEVREL(wxCoord y) const
 100     {
 101         return wxRound((double)(y) * m_scaleY);
 102     }
 103
 104 protected:
 105     // base class pure virtuals implemented here
 106     virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 107     virtual void DoGetSizeMM(int* width, int* height) const;
 108
 109 public:
 110     // GTK-specific member variables
 111
 112     // not sure what for, but what is a mm on a screen you don't know the size
 113     // of?
 114     double       m_mm_to_pix_x,
 115                  m_mm_to_pix_y;
 116
 117     bool         m_needComputeScaleX,
 118                  m_needComputeScaleY; // not yet used
 119
 120
 121 private:
 122     DECLARE_ABSTRACT_CLASS(wxDC)
 123 };
 124
 125 // this must be defined when wxDC::Blit() honours the DC origian and needed to
 126 // allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
 127 // 2.3.[23]
 128 #ifndef wxHAS_WORKING_GTK_DC_BLIT
 129     #define wxHAS_WORKING_GTK_DC_BLIT
 130 #endif
 131
 132 #endif // __GTKDCH__