split wxSizer::Fit() into ComputeFittingWindow/ClientSize() that only does computatio...

[wxWidgets.git] / docs / latex / wx / weakrefdynamic.tex

\section{\class{wxWeakRefDynamic<T>}}\label{wxweakrefdynamic}

wxWeakRefDynamic<T> is a template class for weak references that is used in 
the same way as wxWeakRef<T>. The only difference is that wxWeakRefDynamic 
defaults to using \texttt{dynamic\_cast<>} for establishing the object 
reference (while wxWeakRef defaults to \texttt{static\_cast<>}). 

So, wxWeakRef will detect a type mismatch during compile time and will
have a little better run-time performance. The role of wxWeakRefDynamic
is to handle objects which derived type one does not know. 

\textbf{Note:} wxWeakRef<T> selects an implementation based on the static type 
of T. If T does not have wxTrackable statically, it defaults to to a mixed-
mode operation, where it uses \texttt{dynamic\_cast<>} as the last measure (if 
available from the compiler and enabled when building wxWidgets). 

For general cases, wxWeakRef<T> is the better choice. 

For API documentation, see: \helpref{wxWeakRef}{wxweakref}