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 #include "wx/object.h"  // base class
  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 WXDLLEXPORT wxGDIRefData : public wxObjectRefData
  24 {
  25     // this class is intentionally left blank
  26 };
  27
  28 // ----------------------------------------------------------------------------
  29 // wxGDIObject
  30 // ----------------------------------------------------------------------------
  31
  32 class WXDLLEXPORT wxGDIObject : public wxObject
  33 {
  34 public:
  35     wxGDIObject() { m_visible = false; };
  36
  37     // Creates the resource
  38     virtual bool RealizeResource() { return false; };
  39
  40     // Frees the resource
  41     virtual bool FreeResource(bool WXUNUSED(force) = false) { return false; }
  42
  43     virtual bool IsFree() const { return false; }
  44
  45     bool IsNull() const { return (m_refData == 0); }
  46
  47     // Returns handle.
  48     virtual WXHANDLE GetResourceHandle() const { return 0; }
  49
  50     virtual bool GetVisible() { return m_visible; }
  51     virtual void SetVisible(bool v) { m_visible = v; }
  52
  53 protected:
  54     bool m_visible; // true only if we should delete this object ourselves
  55
  56 private:
  57     DECLARE_DYNAMIC_CLASS(wxGDIObject)
  58 };
  59
  60 #endif
  61     // _WX_GDIOBJ_H_