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 // constants
  15 //-----------------------------------------------------------------------------
  16
  17 #ifndef MM_TEXT
  18 #define MM_TEXT         0
  19 #define MM_ISOTROPIC    1
  20 #define MM_ANISOTROPIC  2
  21 #define MM_LOMETRIC     3
  22 #define MM_HIMETRIC     4
  23 #define MM_TWIPS        5
  24 #define MM_POINTS       6
  25 #define MM_METRIC       7
  26 #endif
  27
  28 //-----------------------------------------------------------------------------
  29 // wxDC
  30 //-----------------------------------------------------------------------------
  31
  32 class WXDLLIMPEXP_CORE wxDC : public wxDCBase
  33 {
  34 public:
  35     wxDC();
  36     virtual ~wxDC() { }
  37
  38 #if wxUSE_PALETTE
  39     void SetColourMap( const wxPalette& palette ) { SetPalette(palette); };
  40 #endif // wxUSE_PALETTE
  41
  42     // Resolution in pixels per logical inch
  43     virtual wxSize GetPPI() const;
  44
  45     virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return true; }
  46     virtual void EndDoc() { }
  47     virtual void StartPage() { }
  48     virtual void EndPage() { }
  49
  50     virtual wxCoord DeviceToLogicalX(wxCoord x) const;
  51     virtual wxCoord DeviceToLogicalY(wxCoord y) const;
  52     virtual wxCoord DeviceToLogicalXRel(wxCoord x) const;
  53     virtual wxCoord DeviceToLogicalYRel(wxCoord y) const;
  54     virtual wxCoord LogicalToDeviceX(wxCoord x) const;
  55     virtual wxCoord LogicalToDeviceY(wxCoord y) const;
  56     virtual wxCoord LogicalToDeviceXRel(wxCoord x) const;
  57     virtual wxCoord LogicalToDeviceYRel(wxCoord y) const ;
  58
  59     virtual void SetMapMode( int mode );
  60     virtual void SetUserScale( double x, double y );
  61     virtual void SetLogicalScale( double x, double y );
  62     virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
  63     virtual void SetDeviceOrigin( wxCoord x, wxCoord y );
  64
  65     virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
  66
  67     virtual void ComputeScaleAndOrigin();
  68
  69     virtual GdkWindow* GetGDKWindow() const { return NULL; }
  70
  71 protected:
  72     // implementation
  73     // --------------
  74
  75     wxCoord XDEV2LOG(wxCoord x) const
  76     {
  77         return DeviceToLogicalX(x);
  78     }
  79     wxCoord XDEV2LOGREL(wxCoord x) const
  80     {
  81         return DeviceToLogicalXRel(x);
  82     }
  83     wxCoord YDEV2LOG(wxCoord y) const
  84     {
  85         return DeviceToLogicalY(y);
  86     }
  87     wxCoord YDEV2LOGREL(wxCoord y) const
  88     {
  89         return DeviceToLogicalYRel(y);
  90     }
  91     wxCoord XLOG2DEV(wxCoord x) const
  92     {
  93         return LogicalToDeviceX(x);
  94     }
  95     wxCoord XLOG2DEVREL(wxCoord x) const
  96     {
  97         return LogicalToDeviceXRel(x);
  98     }
  99     wxCoord YLOG2DEV(wxCoord y) const
 100     {
 101         return LogicalToDeviceY(y);
 102     }
 103     wxCoord YLOG2DEVREL(wxCoord y) const
 104     {
 105         return LogicalToDeviceYRel(y);
 106     }
 107
 108     // base class pure virtuals implemented here
 109     virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
 110     virtual void DoGetSizeMM(int* width, int* height) const;
 111
 112 public:
 113     // GTK-specific member variables
 114
 115     // not sure what for, but what is a mm on a screen you don't know the size
 116     // of?
 117     double       m_mm_to_pix_x,
 118                  m_mm_to_pix_y;
 119
 120     bool         m_needComputeScaleX,
 121                  m_needComputeScaleY; // not yet used
 122
 123
 124 private:
 125     DECLARE_ABSTRACT_CLASS(wxDC)
 126 };
 127
 128 // this must be defined when wxDC::Blit() honours the DC origian and needed to
 129 // allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
 130 // 2.3.[23]
 131 #ifndef wxHAS_WORKING_GTK_DC_BLIT
 132     #define wxHAS_WORKING_GTK_DC_BLIT
 133 #endif
 134
 135 #endif // __GTKDCH__