3f66f6a5b3
This keyword is not expanded by Git which means it's not replaced with the correct revision value in the releases made using git-based scripts and it's confusing to have lines with unexpanded "$Id$" in the released files. As expanding them with Git is not that simple (it could be done with git archive and export-subst attribute) and there are not many benefits in having them in the first place, just remove all these lines. If nothing else, this will make an eventual transition to Git simpler. Closes #14487. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74602 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/tracker.h
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// Purpose: Support class for object lifetime tracking (wxWeakRef<T>)
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// Author: Arne Steinarson
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// Created: 28 Dec 07
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// Copyright: (c) 2007 Arne Steinarson
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TRACKER_H_
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#define _WX_TRACKER_H_
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#include "wx/defs.h"
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class wxEventConnectionRef;
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// This class represents an object tracker and is stored in a linked list
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// in the tracked object. It is only used in one of its derived forms.
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class WXDLLIMPEXP_BASE wxTrackerNode
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{
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public:
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wxTrackerNode() : m_nxt(NULL) { }
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virtual ~wxTrackerNode() { }
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virtual void OnObjectDestroy() = 0;
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virtual wxEventConnectionRef *ToEventConnection() { return NULL; }
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private:
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wxTrackerNode *m_nxt;
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friend class wxTrackable; // For list access
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friend class wxEvtHandler; // For list access
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};
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// Add-on base class for a trackable object.
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class WXDLLIMPEXP_BASE wxTrackable
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{
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public:
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void AddNode(wxTrackerNode *prn)
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{
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prn->m_nxt = m_first;
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m_first = prn;
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}
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void RemoveNode(wxTrackerNode *prn)
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{
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for ( wxTrackerNode **pprn = &m_first; *pprn; pprn = &(*pprn)->m_nxt )
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{
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if ( *pprn == prn )
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{
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*pprn = prn->m_nxt;
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return;
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}
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}
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wxFAIL_MSG( "removing invalid tracker node" );
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}
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wxTrackerNode *GetFirst() const { return m_first; }
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protected:
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// this class is only supposed to be used as a base class but never be
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// created nor destroyed directly so all ctors and dtor are protected
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wxTrackable() : m_first(NULL) { }
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// copy ctor and assignment operator intentionally do not copy m_first: the
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// objects which track the original trackable shouldn't track the new copy
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wxTrackable(const wxTrackable& WXUNUSED(other)) : m_first(NULL) { }
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wxTrackable& operator=(const wxTrackable& WXUNUSED(other)) { return *this; }
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// dtor is not virtual: this class is not supposed to be used
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// polymorphically and adding a virtual table to it would add unwanted
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// overhead
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~wxTrackable()
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{
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// Notify all registered refs
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while ( m_first )
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{
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wxTrackerNode * const first = m_first;
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m_first = first->m_nxt;
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first->OnObjectDestroy();
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}
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}
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wxTrackerNode *m_first;
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};
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#endif // _WX_TRACKER_H_
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