include/wx/mgl/gdiobj.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/gdiobj.h
   3 // Purpose:     wxGDIObject class: base class for other GDI classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GDIOBJ_H_
  13 #define _WX_GDIOBJ_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "gdiobj.h"
  17 #endif
  18
  19 #include "wx/object.h"  // base class
  20
  21 // ----------------------------------------------------------------------------
  22 // wxGDIRefData is the base class for wxXXXData structures which contain the
  23 // real data for the GDI object and are shared among all wxWin objects sharing
  24 // the same native GDI object
  25 // ----------------------------------------------------------------------------
  26
  27 class WXDLLEXPORT wxGDIRefData : public wxObjectRefData
  28 {
  29     // this class is intentionally left blank
  30 };
  31
  32 // ----------------------------------------------------------------------------
  33 // wxGDIObject
  34 // ----------------------------------------------------------------------------
  35
  36 class WXDLLEXPORT wxGDIObject : public wxObject
  37 {
  38 public:
  39     wxGDIObject() {}
  40
  41     virtual bool GetVisible() { return m_visible; }
  42     virtual void SetVisible( bool visible ) { m_visible = visible; }
  43
  44     bool IsNull() const { return (m_refData == 0); }
  45
  46 protected:
  47     bool m_visible; /* can a pointer to this object be safely taken?
  48                      * - only if created within FindOrCreate... */
  49
  50 private:
  51     DECLARE_DYNAMIC_CLASS(wxGDIObject)
  52 };
  53
  54 #endif
  55     // _WX_GDIOBJ_H_