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define (unusual) copy ctor and assignment operator for wxTrackable (part of patch 1870445); also make its ctors and dtor protected as this class shouldn't used otherwise as a base class

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51232 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2008-01-16 02:04:00 +00:00
parent 2ef0f6ce31
commit dd10e6143b
1 changed files with 24 additions and 15 deletions
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39
include/wx/tracker.h
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@ -38,19 +38,6 @@ private:
class wxTrackable
{
public:
wxTrackable() : m_first(NULL) { }
~wxTrackable()
{
// Notify all registered refs
while ( m_first )
{
wxTrackerNode * const first = m_first;
m_first = first->m_nxt;
first->OnObjectDestroy();
}
}
void AddNode(wxTrackerNode *prn)
{
prn->m_nxt = m_first;
@ -74,9 +61,31 @@ public:
wxTrackerNode *GetFirst() const { return m_first; }
protected:
wxTrackerNode *m_first;
// this class is only supposed to be used as a base class but never be
// created nor destroyed directly so all ctors and dtor are protected
DECLARE_NO_COPY_CLASS(wxTrackable)
wxTrackable() : m_first(NULL) { }
// copy ctor and assignment operator intentionally do not copy m_first: the
// objects which track the original trackable shouldn't track the new copy
wxTrackable(const wxTrackable& WXUNUSED(other)) : m_first(NULL) { }
wxTrackable& operator=(const wxTrackable& WXUNUSED(other)) { return *this; }
// dtor is not virtual: this class is not supposed to be used
// polymorphically and adding a virtual table to it would add unwanted
// overhead
~wxTrackable()
{
// Notify all registered refs
while ( m_first )
{
wxTrackerNode * const first = m_first;
m_first = first->m_nxt;
first->OnObjectDestroy();
}
}
wxTrackerNode *m_first;
};
#endif // _WX_TRACKER_H_