wxWidgets/include/wx/msw/gdiobj.h
Julian Smart e90babdf85 Added progdlgg.cpp to makefiles; fixed true/false in treectrl.h; made IsFree
consistent (const omission)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2649 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-06-02 14:08:08 +00:00

68 lines
1.9 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// Name: gdiobj.h
// Purpose: wxGDIObject class: base class for other GDI classes
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_GDIOBJ_H_
#define _WX_GDIOBJ_H_
#include "wx/object.h"
#ifdef __GNUG__
#pragma interface "gdiobj.h"
#endif
// wxGDIRefData is the reference-counted data part of a GDI object.
// It contains another counter, m_usageCount, which counts the number
// of times this object has been used; e.g. in SetFont, the count
// is incremented. This is different from reference counting,
// where only the constructors, destructors and (un)clone operations
// affect the reference count.
// THIS IS NOW BEING REMOVED AS REDUNDANT AND ERROR-PRONE
class WXDLLEXPORT wxGDIRefData: public wxObjectRefData {
public:
inline wxGDIRefData(void)
{
}
};
#define M_GDIDATA ((wxGDIRefData *)m_refData)
class WXDLLEXPORT wxGDIObject: public wxObject
{
DECLARE_DYNAMIC_CLASS(wxGDIObject)
public:
inline wxGDIObject(void) { m_visible = FALSE; };
inline ~wxGDIObject(void) {};
// Creates the resource
virtual bool RealizeResource(void) { return FALSE; };
// Frees the resource
virtual bool FreeResource(bool WXUNUSED(force) = FALSE) { return FALSE; };
virtual bool IsFree(void) const { return FALSE; };
inline bool IsNull(void) const { return (m_refData == 0); }
// Returns handle.
virtual WXHANDLE GetResourceHandle(void) { return 0; }
virtual bool GetVisible(void) { return m_visible; }
virtual void SetVisible(bool v) { m_visible = v; }
protected:
bool m_visible; // Can a pointer to this object be safely taken?
// - only if created within FindOrCreate...
};
#endif
// _WX_GDIOBJ_H_