// another example: using default values and the full path instead of just
// key name: if the key is not found , the value 17 is returned
- long value = config->Read("/LastRun/CalculatedValues/MaxValue", -1);
+ long value = config->Read("/LastRun/CalculatedValues/MaxValue", 17);
...
...
...
one (especially because creating a wxFileConfig object might be a time
consuming operation). In this case, you may create this global config object
in the very start of the program and {\it Set()} it as the default. Then, from
-anywhere in your program, you may access it using the {\it Get()} function. Of
-course, you should delete it on the program termination (otherwise, not only a
-memory leak will result, but even more importantly the changes won't be
-written back!).
+anywhere in your program, you may access it using the {\it Get()} function.
+Note that wxWindows will delete this config object for you during the program
+shutdown (from \helpref{wxApp::OnExit}{wxapponexit} to be precise) but you can
+also do it yourself earlier if needed.
As it happens, you may even further simplify the procedure described above:
you may forget about calling {\it Set()}. When {\it Get()} is called and there
change in the near future). To work with other types: for {\it int} or {\it
bool} you can work with function taking/returning {\it long} and just use the
casts. Better yet, just use {\it long} for all variables which you're going to
-save in the config file: chances are that \verb$sizeof(bool) == sizeof(int) == sizeof(long)$ anyhow on your system. For {\it float}, {\it double} and, in
+save in the config file: chances are that \tt{sizeof(bool) == sizeof(int) == sizeof(long)} anyhow on your system. For {\it float}, {\it double} and, in
general, any other type you'd have to translate them to/from string
representation and use string functions.
UserData = %windir%\\data.dat
\end{verbatim}
-the call to \verb$config->Read("UserData")$ will return something like
-\verb$"/home/zeitlin/data"$ if you're lucky enough to run a Linux system ;-)
+the call to \tt{config->Read("UserData")} will return something like
+\tt{"/home/zeitlin/data"} if you're lucky enough to run a Linux system ;-)
Although this feature is very useful, it may be annoying if you read a value
which containts '\$' or '\%' symbols (\% is used for environment variables
NB: writing
-{\small \begin{verbatim} conf->Read("key", 0); \end{verbatim} }
+{\small
+\begin{verbatim}
+ conf->Read("key", 0);
+\end{verbatim}
+}
won't work because the call is ambiguous: compiler can not choose between two
{\it Read} functions. Instead, write:
-{\small \begin{verbatim} conf->Read("key", 0l); \end{verbatim} }
+{\small
+\begin{verbatim}
+ conf->Read("key", 0l);
+\end{verbatim}
+}
\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{double*}{ d}}