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 wxCoord DeviceToLogicalX(wxCoord x) const;
  57     virtual wxCoord DeviceToLogicalY(wxCoord y) const;
  58     virtual wxCoord DeviceToLogicalXRel(wxCoord x) const;
  59     virtual wxCoord DeviceToLogicalYRel(wxCoord y) const;
  60     virtual wxCoord LogicalToDeviceX(wxCoord x) const;
  61     virtual wxCoord LogicalToDeviceY(wxCoord y) const;
  62     virtual wxCoord LogicalToDeviceXRel(wxCoord x) const;
  63     virtual wxCoord LogicalToDeviceYRel(wxCoord y) const ;
  64
  65     virtual void SetMapMode( int mode );
  66     virtual void SetUserScale( double x, double y );
  67     virtual void SetLogicalScale( double x, double y );
  68     virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
  69     virtual void SetDeviceOrigin( wxCoord x, wxCoord y );
  70
  71     virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
  72
  73     // implementation
  74     // --------------
  75
  76     virtual void ComputeScaleAndOrigin();
  77
  78     virtual GdkWindow* GetGDKWindow() const { return NULL; }
  79
  80     wxCoord XDEV2LOG(wxCoord x) const
  81     {
  82         return wxRound((double)(x - m_deviceOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
  83     }
  84     wxCoord XDEV2LOGREL(wxCoord x) const
  85     {
  86         return wxRound((double)(x) / m_scaleX);
  87     }
  88     wxCoord YDEV2LOG(wxCoord y) const
  89     {
  90         return wxRound((double)(y - m_deviceOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
  91     }
  92     wxCoord YDEV2LOGREL(wxCoord y) const
  93     {
  94         return wxRound((double)(y) / m_scaleY);
  95     }
  96     wxCoord XLOG2DEV(wxCoord x) const
  97     {
  98         return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX;
  99     }
 100     wxCoord XLOG2DEVREL(wxCoord x) const
 101     {
 102         return wxRound((double)(x) * m_scaleX);
 103     }
 104     wxCoord YLOG2DEV(wxCoord y) const
 105     {
 106         return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY;
 107     }
 108     wxCoord YLOG2DEVREL(wxCoord y) const
 109     {
 110         return wxRound((double)(y) * m_scaleY);
 111     }
 112
 113 protected:
 114     // base class pure virtuals implemented here
 115     virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 116     virtual void DoGetSizeMM(int* width, int* height) const;
 117
 118 public:
 119     // GTK-specific member variables
 120
 121     // not sure what for, but what is a mm on a screen you don't know the size
 122     // of?
 123     double       m_mm_to_pix_x,
 124                  m_mm_to_pix_y;
 125
 126     bool         m_needComputeScaleX,
 127                  m_needComputeScaleY; // not yet used
 128
 129
 130 private:
 131     DECLARE_ABSTRACT_CLASS(wxDC)
 132 };
 133
 134 // this must be defined when wxDC::Blit() honours the DC origian and needed to
 135 // allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
 136 // 2.3.[23]
 137 #ifndef wxHAS_WORKING_GTK_DC_BLIT
 138     #define wxHAS_WORKING_GTK_DC_BLIT
 139 #endif
 140
 141 #endif // __GTKDCH__