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improvements to wxWeakRef and related classes

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51187 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2008-01-13 01:12:13 +00:00
parent 0fb0ecc452
commit cc6ceca789
12 changed files with 983 additions and 309 deletions
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87
include/wx/event.h
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@@ -39,6 +39,7 @@ class WXDLLIMPEXP_FWD_BASE wxList;
#endif // wxUSE_GUI
class WXDLLIMPEXP_FWD_BASE wxEvtHandler;
class wxEventConnectionRef;
// ----------------------------------------------------------------------------
// Event types
@@ -2258,44 +2259,11 @@ protected:
DECLARE_NO_COPY_CLASS(wxEventHashTable)
};
// ----------------------------------------------------------------------------
// wxEventConnectionRef: A class that represents all connections between two event
// handlers and enables automatic disconnect when an event handler sink goes
// out of scope. Each connection/disconnect increases/decreases ref count, and
// when zero the node goes out of scope.
// ----------------------------------------------------------------------------
struct wxEventConnectionRef : public wxTrackerNode {
wxEventConnectionRef() : m_src(0), m_sink(0), m_refCount(0) { }
wxEventConnectionRef( wxEvtHandler *src, wxEvtHandler *sink );
virtual ~wxEventConnectionRef();
// The sink is being destroyed
virtual void OnObjectDestroy( );
virtual wxTrackerNodeType GetType( ){ return EventConnectionRef; }
void IncRef( ) { m_refCount++; }
void DecRef( );
protected:
wxEvtHandler *m_src, *m_sink;
int m_refCount;
friend class wxEvtHandler;
private:
// It makes no sense to copy objects of this class
wxEventConnectionRef& operator = (const wxEventConnectionRef& WXUNUSED(other)) { wxFAIL; return *this; }
};
// ----------------------------------------------------------------------------
// wxEvtHandler: the base class for all objects handling wxWidgets events
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxEvtHandler : public wxObject, public wxTrackableBase
class WXDLLIMPEXP_BASE wxEvtHandler : public wxObject, public wxTrackable
{
public:
wxEvtHandler();
@@ -2463,12 +2431,61 @@ protected:
virtual void *DoGetClientData() const;
// Search tracker objects for event connection with this sink
wxEventConnectionRef *FindRefInTrackerList( wxEvtHandler *eventSink );
wxEventConnectionRef *FindRefInTrackerList(wxEvtHandler *eventSink);
private:
DECLARE_DYNAMIC_CLASS_NO_COPY(wxEvtHandler)
};
// ----------------------------------------------------------------------------
// wxEventConnectionRef represents all connections between two event handlers
// and enables automatic disconnect when an event handler sink goes out of
// scope. Each connection/disconnect increases/decreases ref count, and
// when it reaches zero the node goes out of scope.
// ----------------------------------------------------------------------------
class wxEventConnectionRef : public wxTrackerNode
{
public:
wxEventConnectionRef() : m_src(NULL), m_sink(NULL), m_refCount(0) { }
wxEventConnectionRef(wxEvtHandler *src, wxEvtHandler *sink)
: m_src(src), m_sink(sink), m_refCount(1)
{
m_sink->AddNode(this);
}
// The sink is being destroyed
virtual void OnObjectDestroy( )
{
if ( m_src )
m_src->OnSinkDestroyed( m_sink );
delete this;
}
virtual wxEventConnectionRef *ToEventConnection() { return this; }
void IncRef() { m_refCount++; }
void DecRef()
{
if ( !--m_refCount )
{
// The sink holds the only external pointer to this object
if ( m_sink )
m_sink->RemoveNode(this);
delete this;
}
}
private:
wxEvtHandler *m_src,
*m_sink;
int m_refCount;
friend class wxEvtHandler;
DECLARE_NO_ASSIGN_CLASS(wxEventConnectionRef)
};
// Post a message to the given eventhandler which will be processed during the
// next event loop iteration
inline void wxPostEvent(wxEvtHandler *dest, const wxEvent& event)