include/wx/msw/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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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() { m_visible = FALSE; };
  40
  41     // Creates the resource
  42     virtual bool RealizeResource() { return FALSE; };
  43
  44     // Frees the resource
  45     virtual bool FreeResource(bool WXUNUSED(force) = FALSE) { return FALSE; }
  46
  47     virtual bool IsFree() const { return FALSE; }
  48
  49     bool IsNull() const { return (m_refData == 0); }
  50
  51     // Returns handle.
  52     virtual WXHANDLE GetResourceHandle() const { return 0; }
  53
  54     virtual bool GetVisible() { return m_visible; }
  55     virtual void SetVisible(bool v) { m_visible = v; }
  56
  57 protected:
  58     bool m_visible; // TRUE only if we should delete this object ourselves
  59
  60 private:
  61     DECLARE_DYNAMIC_CLASS(wxGDIObject)
  62 };
  63
  64 #endif
  65     // _WX_GDIOBJ_H_