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