include/wx/os2/gdiobj.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gdiobj.h
   3 // Purpose:     wxGDIObject class: base class for other GDI classes
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     ??/??/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GDIOBJ_H_
  13 #define _WX_GDIOBJ_H_
  14
  15 #include "wx/object.h"
  16
  17 class WXDLLEXPORT wxGDIRefData: public wxObjectRefData
  18 {
  19 public:
  20     inline wxGDIRefData()
  21     { }
  22 };
  23
  24 #define M_GDIDATA ((wxGDIRefData *)m_refData)
  25
  26 class WXDLLEXPORT wxGDIObject: public wxObject
  27 {
  28 DECLARE_DYNAMIC_CLASS(wxGDIObject)
  29  public:
  30   inline wxGDIObject() { m_visible = FALSE; };
  31   inline ~wxGDIObject() {};
  32
  33   // Creates the resource
  34   virtual bool RealizeResource(void) { return FALSE; };
  35
  36   // Frees the resource
  37   virtual bool FreeResource(bool WXUNUSED(force) = FALSE) { return FALSE; };
  38
  39   virtual bool IsFree(void) const { return FALSE; };
  40
  41   inline bool IsNull() const { return (m_refData == 0); }
  42
  43   virtual bool GetVisible() { return m_visible; }
  44   virtual void SetVisible(bool v) { m_visible = v; }
  45
  46 protected:
  47   bool m_visible; // Can a pointer to this object be safely taken?
  48                  // - only if created within FindOrCreate...
  49 };
  50
  51 #endif
  52     // _WX_GDIOBJ_H_