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 // wxDC
  15 //-----------------------------------------------------------------------------
  16
  17 class WXDLLIMPEXP_CORE wxDC : public wxDCBase
  18 {
  19 public:
  20     wxDC();
  21     virtual ~wxDC() { }
  22
  23 #if wxUSE_PALETTE
  24     void SetColourMap( const wxPalette& palette ) { SetPalette(palette); };
  25 #endif // wxUSE_PALETTE
  26
  27     // Resolution in pixels per logical inch
  28     virtual wxSize GetPPI() const;
  29
  30     virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return true; }
  31     virtual void EndDoc() { }
  32     virtual void StartPage() { }
  33     virtual void EndPage() { }
  34
  35     virtual GdkWindow* GetGDKWindow() const { return NULL; }
  36
  37 protected:
  38     // implementation
  39     wxCoord XDEV2LOG(wxCoord x) const       { return DeviceToLogicalX(x); }
  40     wxCoord XDEV2LOGREL(wxCoord x) const    { return DeviceToLogicalXRel(x); }
  41     wxCoord YDEV2LOG(wxCoord y) const       { return DeviceToLogicalY(y); }
  42     wxCoord YDEV2LOGREL(wxCoord y) const    { return DeviceToLogicalYRel(y); }
  43     wxCoord XLOG2DEV(wxCoord x) const       { return LogicalToDeviceX(x); }
  44     wxCoord XLOG2DEVREL(wxCoord x) const    { return LogicalToDeviceXRel(x); }
  45     wxCoord YLOG2DEV(wxCoord y) const       { return LogicalToDeviceY(y); }
  46     wxCoord YLOG2DEVREL(wxCoord y) const    { return LogicalToDeviceYRel(y); }
  47
  48     // base class pure virtuals implemented here
  49     virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
  50     virtual void DoGetSizeMM(int* width, int* height) const;
  51
  52 private:
  53     DECLARE_ABSTRACT_CLASS(wxDC)
  54 };
  55
  56 // this must be defined when wxDC::Blit() honours the DC origian and needed to
  57 // allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
  58 // 2.3.[23]
  59 #ifndef wxHAS_WORKING_GTK_DC_BLIT
  60     #define wxHAS_WORKING_GTK_DC_BLIT
  61 #endif
  62
  63 #endif // __GTKDCH__