include/wx/gdiobj.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gdiobj.h
   3 // Purpose:     wxGDIObject base header
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Julian Smart
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows Licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GDIOBJ_H_BASE_
  13 #define _WX_GDIOBJ_H_BASE_
  14
  15 #include "wx/object.h"
  16
  17 // ----------------------------------------------------------------------------
  18 // wxGDIRefData is the base class for wxXXXData structures which contain the
  19 // real data for the GDI object and are shared among all wxWin objects sharing
  20 // the same native GDI object
  21 // ----------------------------------------------------------------------------
  22
  23 class WXDLLIMPEXP_CORE wxGDIRefData: public wxObjectRefData { };
  24
  25 // ----------------------------------------------------------------------------
  26 // wxGDIObject
  27 // ----------------------------------------------------------------------------
  28
  29 class WXDLLIMPEXP_CORE wxGDIObject: public wxObject
  30 {
  31 public:
  32     bool IsNull() const { return m_refData == NULL; }
  33
  34 #if defined(__WXMSW__) || defined(__WXOS2__) || defined(__WXPALMOS__)
  35     // Creates the resource
  36     virtual bool RealizeResource() { return false; }
  37
  38     // Frees the resource
  39     virtual bool FreeResource(bool WXUNUSED(force) = false) { return false; }
  40
  41     virtual bool IsFree() const { return false; }
  42
  43     // Returns handle.
  44     virtual WXHANDLE GetResourceHandle() const { return 0; }
  45 #endif // defined(__WXMSW__) || defined(__WXOS2__)
  46
  47     DECLARE_DYNAMIC_CLASS(wxGDIObject)
  48 };
  49
  50 #endif
  51     // _WX_GDIOBJ_H_BASE_