X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6bcfd974ef26faf6f91a62cac09827e09463fd1..a9249b2eb2a40d8c71f828669045c4ddaa8dc5ff:/docs/latex/wx/config.tex?ds=sidebyside diff --git a/docs/latex/wx/config.tex b/docs/latex/wx/config.tex index 51e85c0c61..6ae7706b42 100644 --- a/docs/latex/wx/config.tex +++ b/docs/latex/wx/config.tex @@ -53,7 +53,7 @@ Here is how you would typically use this class: // 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); ... ... ... @@ -86,10 +86,10 @@ instead of creating and deleting the local config objects each time you need 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 @@ -257,7 +257,7 @@ Currently, only two types of data are supported: string and long (but it might 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. @@ -309,8 +309,8 @@ config file: 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 @@ -593,12 +593,20 @@ if the key is not found. 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}} @@ -678,11 +686,12 @@ exist it is created. \func{void}{SetRecordDefaults}{\param{bool }{bDoIt = TRUE}} -Sets whether defaults are written back to the config file. +Sets whether defaults are recorded to the config file whenever an attempt to +read read the value which is not present in it is done. -If on (default is off) all default values are written back to the config file. -This allows the user to see what config options may be changed and is probably -useful only for wxFileConfig. +If on (default is off) all default values for the settings used by the program +are written back to the config file. This allows the user to see what config +options may be changed and is probably useful only for wxFileConfig. \membersection{wxConfigBase::SetUmask}\label{wxfileconfigsetumask}