\section{\class{wxConfigBase}}\label{wxconfigbase}
wxConfigBase class defines the basic interface of all config classes. It can
-not be used by itself (it's an abstract base class) and you'll always use one
-of it's derivations: \helpref{wxIniConfig}{wxiniconfig},
-\helpref{wxFileConfig}{wxfileconfig}, \helpref{wxRegConfig}{wxregconfig} or
-any other.
+not be used by itself (it is an abstract base class) and you will always use one
+of its derivations: \helpref{wxFileConfig}{wxfileconfig},
+wxRegConfig or any other.
However, usually you don't even need to know the precise nature of the class
you're working with but you would just use the wxConfigBase methods. This
allows you to write the same code regardless of whether you're working with
the registry under Win32 or text-based config files under Unix (or even
Windows 3.1 .INI files if you're really unlucky). To make writing the portable
-code even easier, wxWindows provides a typedef \helpref{wxConfig}{wxconfig}
+code even easier, wxWidgets provides a typedef wxConfig
which is mapped onto the native wxConfigBase implementation on the given
-platform: i.e. wxRegConfig under Win32, wxIniConfig under Win16 and
+platform: i.e. wxRegConfig under Win32 and
wxFileConfig otherwise.
-See \helpref{config overview}{configoverview} for the descriptions of all
+See \helpref{config overview}{wxconfigoverview} for the descriptions of all
features of this class.
+It is highly recommended to use static functions {\it Get()} and/or {\it Set()},
+so please have a \helpref{look at them.}{wxconfigstaticfunctions}
+
\wxheading{Derived from}
No base class
+\wxheading{Include files}
+
+<wx/config.h> (to let wxWidgets choose a wxConfig class for your platform)\\
+<wx/confbase.h> (base config class)\\
+<wx/fileconf.h> (wxFileConfig class)\\
+<wx/msw/regconf.h> (wxRegConfig class)
+
\wxheading{Example}
Here is how you would typically use this class:
wxConfig *config = new wxConfig("MyAppName");
wxString str;
- if ( config->Read(&str, "LastPrompt") ) {
- // last prompt was found in the config file/registry and it's value is now
+ if ( config->Read("LastPrompt", &str) ) {
+ // last prompt was found in the config file/registry and its value is now
// in str
...
}
// 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);
...
...
...
This basic example, of course, doesn't show all wxConfig features, such as
enumerating, testing for existence and deleting the entries and groups of
-entries in the config file, it's abilities to automatically store the default
+entries in the config file, its abilities to automatically store the default
values or expand the environment variables on the fly. However, the main idea
is that using this class is easy and that it should normally do what you
expect it to.
NB: in the documentation of this class, the words "config file" also mean
"registry hive" for wxRegConfig and, generally speaking, might mean any
-physical storage where a wxConfigBase-derived class stores it's data.
-
-\wxheading{See also}
+physical storage where a wxConfigBase-derived class stores its data.
-\helpref{wxIniConfig}{wxiniconfig}, \helpref{wxFileConfig}{wxfileconfig},
-\helpref{wxRegConfig}{wxregconfig}
+\latexignore{\rtfignore{\wxheading{Function groups}}}
-\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{static functions}
+\membersection{Static functions}\label{wxconfigstaticfunctions}
-These function deal with the "default" config object. Although it's usage is
+These functions deal with the "default" config object. Although its usage is
not at all mandatory it may be convenient to use a global config object
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.
+This global wxConfig object will be deleted by wxWidgets automatically if it
+exists. Note that this implies that if you do delete this object yourself
+(usually in \helpref{wxApp::OnExit}{wxapponexit}) you must use {\it Set(NULL)}
+to prevent wxWidgets from deleting it the second time.
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
is no current object, it will create one using {\it Create()} function. To
disable this behaviour {\it DontCreateOnDemand()} is provided.
-\func{wxConfigBase *}{Set}{\param{wxConfigBase *}{pConfig}}
-
-Sets the config object as the current one, returns the pointer to the previous
-current object (both the parameter and returned value may be NULL)
-
-\func{wxConfigBase *}{Get}{\void}
+{\bf Note:} You should use either {\it Set()} or {\it Get()} because wxWidgets
+library itself would take advantage of it and could save various information
+in it. For example \helpref{wxFontMapper}{wxfontmapper} or Unix version
+of \helpref{wxFileDialog}{wxfiledialog} have the ability to use wxConfig class.
-Get the current config object. If there is no current object, creates one
-(using {\it Create}) unless DontCreateOnDemand was called previously.
-
-\func{wxConfigBase *}{Create}{\void}
-
-Create a new config object: this function will create the "best"
-implementation of wxConfig available for the current platform, see
-comments near definition wxCONFIG\_WIN32\_NATIVE for details. It returns
-the created object and also sets it as the current one.
-
-\func{void}{DontCreateOnDemand}{\void}
-
-Calling this function will prevent {\it Get()} from automatically creating a
-new config object if the current one is NULL. It might be useful to call it
-near the program end to prevent new config object "accidental" creation.
+\helpref{Set}{wxconfigbaseset}\\
+\helpref{Get}{wxconfigbaseget}\\
+\helpref{Create}{wxconfigbasecreate}\\
+\helpref{DontCreateOnDemand}{wxconfigbasedontcreateondemand}
-\membersection{ctor and dtor}
-\func{}{wxConfigBase}{\void}
+\membersection{Constructor and destructor}\label{congigconstructordestructor}
-This is the default and only constructor of wxConfigBase class. It initializes
-it options: by default, environment variable expansion is on and recording
-defaults is off.
-
-\func{}{\destruct{wxConfigBase}}{\void}
+\helpref{wxConfigBase}{wxconfigbasector}\\
+\helpref{\destruct{wxConfigBase}}{wxconfigbasedtor}
-Empty but ensures that dtor of all derived classes is virtual.
-\membersection{path management}
+\membersection{Path management}\label{configpathmanagement}
-As explained in \helpref{config overview}{configoverview}, the config classes
+As explained in \helpref{config overview}{wxconfigoverview}, the config classes
support a file system-like hierarchy of keys (files) and groups (directories).
As in the file system case, to specify a key in the config class you must use
a path to it. Config classes also support the notion of the current group,
which makes it possible to use the relative paths. To clarify all this, here
-is an example (it's only for the sake of demonstration, it doesn't do anything
+is an example (it is only for the sake of demonstration, it doesn't do anything
sensible!):
\begin{verbatim}
// create an entry in subgroup
conf->Write("SubgroupEntry", 3);
-
+
// '..' is understood
conf->Write("../GroupEntry", 2);
conf->SetPath("..");
wxASSERT( conf->Read("Subgroup/SubgroupEntry", 0l) == 3 );
- // use absolute path: it's allowed, too
+ // use absolute path: it is allowed, too
wxASSERT( conf->Read("/RootEntry", 0l) == 1 );
\end{verbatim}
-{\it Warning}: it's probably a good idea to always restore the path to it's
+{\it Warning}: it is probably a good idea to always restore the path to its
old value on function exit:
+
\begin{verbatim}
void foo(wxConfigBase *config)
{
void bar(wxConfigBase *config)
{
config->Write("Test", 17);
-
+
foo(config);
// we're reading "/Foo/Data/Test" here! -1 will probably be returned...
\end{verbatim}
Finally, the path separator in wxConfigBase and derived classes is always '/',
-regardless of the platform (i.e. it's {\bf not} '\\' under Windows).
-
-\func{void}{SetPath}{\param{const wxString& }{strPath}}
-
-Set current path: if the first character is '/', it's the absolute path,
-otherwise it's a relative path. '..' is supported. If the strPath
-doesn't exist it is created.
+regardless of the platform (i.e. it is {\bf not} '$\backslash\backslash$' under Windows).
-\func{const wxString& }{GetPath}{\void} const
+\helpref{SetPath}{wxconfigbasesetpath}\\
+\helpref{GetPath}{wxconfigbasegetpath}
-Retrieve the current path (always as absolute path).
-\membersection{enumeration}
+\membersection{Enumeration}\label{configenumeration}
The functions in this section allow to enumerate all entries and groups in the
-config file. All functions here return false when there are no more items.
+config file. All functions here return \false when there are no more items.
-You must pass the same lIndex to GetNext and GetFirst (don't modify it).
-Please note that it's {\bf not} the index of the current item (you will have
-some great surprizes with wxRegConfig if you assume this) and you shouldn't
-even look at it: it's just a "cookie" which stores the state of the
+You must pass the same index to GetNext and GetFirst (don't modify it).
+Please note that it is {\bf not} the index of the current item (you will have
+some great surprises with wxRegConfig if you assume this) and you shouldn't
+even look at it: it is just a "cookie" which stores the state of the
enumeration. It can't be stored inside the class because it would prevent you
from running several enumerations simultaneously, that's why you must pass it
explicitly.
Having said all this, enumerating the config entries/groups is very simple:
\begin{verbatim}
+ wxConfigBase *config = ...;
wxArrayString aNames;
// enumeration variables
\end{verbatim}
-There are also functions to get th number of entries/subgroups without
+There are also functions to get the number of entries/subgroups without
actually enumerating them, but you will probably never need them.
-\func{bool }{GetFirstGroup}{\param{wxString& }{str}, \param{long&}{lIndex}} const
-
-\func{bool }{GetNextGroup}{\param{wxString& }{str}, \param{long&}{lIndex}} const
-
-\func{bool }{GetFirstEntry}{\param{wxString& }{str}, \param{long&}{lIndex}} const
-
-\func{bool }{GetNextEntry}{\param{wxString& }{str}, \param{long&}{lIndex}} const
-
-See the example above.
-
-\func{uint }{GetNumberOfEntries}{\param{bool }{bRecursive = FALSE}} const
-
-\func{uint }{GetNumberOfGroups}{\param{bool }{bRecursive = FALSE}} const
-
-Get number of entries/subgroups in the current group, with or without
-it's subgroups.
+\helpref{GetFirstGroup}{wxconfigbasegetfirstgroup}\\
+\helpref{GetNextGroup}{wxconfigbasegetnextgroup}\\
+\helpref{GetFirstEntry}{wxconfigbasegetfirstentry}\\
+\helpref{GetNextEntry}{wxconfigbasegetnextentry}\\
+\helpref{GetNumberOfEntries}{wxconfigbasegetnumberofentries}\\
+\helpref{GetNumberOfGroups}{wxconfigbasegetnumberofgroups}
-\membersection{tests of existence}
-\func{bool }{HasGroup}{\param{const wxString& }{strName}} const
+\membersection{Tests of existence}\label{configtestsofexistence}
-returns TRUE if the group by this name exists
+\helpref{HasGroup}{wxconfigbasehasgroup}\\
+\helpref{HasEntry}{wxconfigbasehasentry}\\
+\helpref{Exists}{wxconfigbaseexists}\\
+\helpref{GetEntryType}{wxconfigbasegetentrytype}
-\func{bool }{HasEntryconst }{\param{wxString& }{strName}} const
-returns TRUE if the entry by this name exists
+\membersection{Miscellaneous functions}\label{configmiscellaneous}
-\func{bool }{Existsconst }{\param{wxString& }{strName}} const
+\helpref{GetAppName}{wxconfigbasegetappname}\\
+\helpref{GetVendorName}{wxconfigbasegetvendorname}\\
+\helpref{SetUmask}{wxfileconfigsetumask}
-returns TRUE if either a group or an entry with a given name exists
-\membersection{key access}
+\membersection{Key access}\label{configkeyaccess}
These function are the core of wxConfigBase class: they allow you to read and
write config file data. All {\it Read} function take a default value which
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.
Final remark: the {\it szKey} parameter for all these functions can contain an
arbitrary path (either relative or absolute), not just the key name.
-\func{bool }{Read}{\param{wxString *}{pStr}, \param{const char *}{szKey}, \param{const char *}{szDefault = NULL}} const
+\helpref{Read}{wxconfigbaseread}\\
+\helpref{Write}{wxconfigbasewrite}\\
+\helpref{Flush}{wxconfigbaseflush}
-Read a string from the key: returns TRUE if value was really read, FALSE if
-default was used (the default value is returned if the key wasn't found)
-\func{const char *}{Read }{\param{const char *}{szKey}, \param{const char *}{szDefault = NULL}} const
+\membersection{Rename entries/groups}\label{configrenaming}
-Another version of {\it Read()} using static buffer.
+The functions in this section allow to rename entries or subgroups of the
+current group. They will return \false on error. typically because either the
+entry/group with the original name doesn't exist, because the entry/group with
+the new name already exists or because the function is not supported in this
+wxConfig implementation.
-NB: although this function seems more convenient, you should only use it if
-you know what you're doing! As it uses a static buffer, it means it will be
-overwritten after each call to this function! If you do use it, you should
-save the returned value to a wxString as soon as possible.
+\helpref{RenameEntry}{wxconfigbaserenameentry}\\
+\helpref{RenameGroup}{wxconfigbaserenamegroup}
-\func{long }{Read}{\param{const char *}{szKey}, \param{long}{lDefault}} const
-Read a long value from the key and return it (lDefault is returned if key not
-found).
+\membersection{Delete entries/groups}\label{configdeleting}
+
+The functions in this section delete entries and/or groups of entries from the
+config file. {\it DeleteAll()} is especially useful if you want to erase all
+traces of your program presence: for example, when you uninstall it.
+
+\helpref{DeleteEntry}{wxconfigbasedeleteentry}\\
+\helpref{DeleteGroup}{wxconfigbasedeletegroup}\\
+\helpref{DeleteAll}{wxconfigbasedeleteall}
+
+
+\membersection{Options}\label{configoptions}
+
+Some aspects of wxConfigBase behaviour can be changed during run-time. The
+first of them is the expansion of environment variables in the string values
+read from the config file: for example, if you have the following in your
+config file:
-NB: writing
-\begin{verbatim}
- conf->Read("key", 0);
-\end{verbatim}
-won't work because the call is ambiguous: compiler can not choose between 2
-{\it Read} functions. Instead, just write
\begin{verbatim}
- conf->Read("key", 0l);
+ # config file for my program
+ UserData = $HOME/data
+
+ # the following syntax is valud only under Windows
+ UserData = %windir%\\data.dat
\end{verbatim}
+% $ % help EMACS syntax highlighting...
+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
+expansion under Windows) which are not used for environment variable
+expansion. In this situation you may call SetExpandEnvVars(false) just before
+reading this value and SetExpandEnvVars(true) just after. Another solution
+would be to prefix the offending symbols with a backslash.
+
+The following functions control this option:
+
+\helpref{IsExpandingEnvVars}{wxconfigbaseisexpandingenvvars}\\
+\helpref{SetExpandEnvVars}{wxconfigbasesetexpandenvvars}\\
+\helpref{SetRecordDefaults}{wxconfigbasesetrecorddefaults}\\
+\helpref{IsRecordingDefaults}{wxconfigbaseisrecordingdefaults}
+
+%%%%% MEMBERS HERE %%%%%
+\helponly{\insertatlevel{2}{
+
+\wxheading{Members}
+
+}}
+
+
+\membersection{wxConfigBase::wxConfigBase}\label{wxconfigbasector}
-\func{bool }{Read }{\param{long *}{pl}, \param{const char *}{szKey}, \param{long}{lDefault = 0}} const
+\func{}{wxConfigBase}{\param{const wxString\& }{appName = wxEmptyString},
+ \param{const wxString\& }{vendorName = wxEmptyString},
+ \param{const wxString\& }{localFilename = wxEmptyString},
+ \param{const wxString\& }{globalFilename = wxEmptyString},
+ \param{long}{ style = 0},
+ \param{wxMBConv\&}{ conv = wxConvUTF8}}
-Another function for reading long values, it returns TRUE if the key was
-really read from config file and FALSE if the default value was used.
+This is the default and only constructor of the wxConfigBase class, and
+derived classes.
-\func{bool}{Write}{\param{const char *}{szKey}, \param{const char *}{szValue}}
-\func{bool}{Write}{\param{const char *}{szKey}, \param{long}{lValue}}
+\wxheading{Parameters}
-Both of these functions write the specified value to the config file and
-return true on success.
+\docparam{appName}{The application name. If this is empty, the class will
+normally use \helpref{wxApp::GetAppName}{wxappgetappname} to set it. The
+application name is used in the registry key on Windows, and can be used to
+deduce the local filename parameter if that is missing.}
-\func{bool }{Flush}{\param{bool }{bCurrentOnly = FALSE}}
+\docparam{vendorName}{The vendor name. If this is empty, it is assumed that
+no vendor name is wanted, if this is optional for the current config class.
+The vendor name is appended to the application name for wxRegConfig.}
+
+\docparam{localFilename}{Some config classes require a local filename. If this
+is not present, but required, the application name will be used instead.}
+
+\docparam{globalFilename}{Some config classes require a global filename. If
+this is not present, but required, the application name will be used instead.}
+
+\docparam{style}{Can be one of wxCONFIG\_USE\_LOCAL\_FILE and
+wxCONFIG\_USE\_GLOBAL\_FILE. The style interpretation depends on the config
+class and is ignored by some implementations. For wxFileConfig, these styles
+determine whether a local or global config file is created or used. If the
+flag is present but the parameter is empty, the parameter will be set to a
+default. If the parameter is present but the style flag not, the relevant flag
+will be added to the style. For wxRegConfig, thie GLOBAL flag refers to HKLM
+key while LOCAL one is for the usual HKCU one.
+
+For wxFileConfig you can also add wxCONFIG\_USE\_RELATIVE\_PATH by logically
+or'ing it to either of the \_FILE options to tell wxFileConfig to use relative
+instead of absolute paths.
+
+On non-VMS Unix systems, the default local configuration file is \tt{~/.appname}.
+However, this path may be also used as user data directory
+(see \helpref{wxStandardPaths::GetUserDataDir}{wxstandardpathsgetuserdatadir}) if
+the application has several data files. In this case wxCONFIG\_USE\_SUBDIR
+flag, which changes the default local configuration file to \tt{~/.appname/appname}
+should be used. Notice that this flag is ignored on non-Unix system, including
+VMS, or if a non-default \textit{localFilename} is provided. \newsince{2.8.2}
+
+For wxFileConfig, you can also add wxCONFIG\_USE\_NO\_ESCAPE\_CHARACTERS which
+will turn off character escaping for the values of entries stored in the config
+file: for example a {\it foo} key with some backslash characters will be stored
+as {\tt foo=C:$\backslash$mydir} instead of the usual storage of {\tt
+foo=C:$\backslash\backslash$mydir}.
+
+The wxCONFIG\_USE\_NO\_ESCAPE\_CHARACTERS style can be helpful if your config
+file must be read or written to by a non-wxWidgets program (which might not
+understand the escape characters). Note, however, that if
+wxCONFIG\_USE\_NO\_ESCAPE\_CHARACTERS style is used, it is is now
+your application's responsibility to ensure that there is no newline or
+other illegal characters in a value, before writing that value to the file.}
+
+\docparam{conv}{This parameter is only used by wxFileConfig when compiled
+in Unicode mode. It specifies the encoding in which the configuration file
+is written.}
+
+
+\wxheading{Remarks}
+
+By default, environment variable expansion is on and recording defaults is
+off.
+
+
+\membersection{wxConfigBase::\destruct{wxConfigBase}}\label{wxconfigbasedtor}
+
+\func{}{\destruct{wxConfigBase}}{\void}
+
+Empty but ensures that dtor of all derived classes is virtual.
+
+
+\membersection{wxConfigBase::Create}\label{wxconfigbasecreate}
+
+\func{static wxConfigBase *}{Create}{\void}
+
+Create a new config object: this function will create the "best"
+implementation of wxConfig available for the current platform, see comments
+near the definition of wxCONFIG\_WIN32\_NATIVE for details. It returns the
+created object and also sets it as the current one.
+
+
+\membersection{wxConfigBase::DontCreateOnDemand}\label{wxconfigbasedontcreateondemand}
+
+\func{void}{DontCreateOnDemand}{\void}
+
+Calling this function will prevent {\it Get()} from automatically creating a
+new config object if the current one is NULL. It might be useful to call it
+near the program end to prevent "accidental" creation of a new config object.
+
+
+\membersection{wxConfigBase::DeleteAll}\label{wxconfigbasedeleteall}
+
+\func{bool}{DeleteAll}{\void}
+
+Delete the whole underlying object (disk file, registry key, ...). Primarly
+for use by uninstallation routine.
+
+
+\membersection{wxConfigBase::DeleteEntry}\label{wxconfigbasedeleteentry}
+
+\func{bool}{DeleteEntry}{\param{const wxString\& }{ key}, \param{bool}{ bDeleteGroupIfEmpty = true}}
+
+Deletes the specified entry and the group it belongs to if it was the last key
+in it and the second parameter is true.
+
+
+\membersection{wxConfigBase::DeleteGroup}\label{wxconfigbasedeletegroup}
+
+\func{bool}{DeleteGroup}{\param{const wxString\& }{ key}}
+
+Delete the group (with all subgroups). If the current path is under the group
+being deleted it is changed to its deepest still existing component. E.g. if
+the current path is \texttt{/A/B/C/D} and the group \texttt{C} is deleted the
+path becomes \texttt{/A/B}.
+
+
+\membersection{wxConfigBase::Exists}\label{wxconfigbaseexists}
+
+\constfunc{bool}{Exists}{\param{wxString\& }{strName}}
+
+returns \true if either a group or an entry with a given name exists
+
+
+\membersection{wxConfigBase::Flush}\label{wxconfigbaseflush}
+
+\func{bool}{Flush}{\param{bool }{bCurrentOnly = false}}
permanently writes all changes (otherwise, they're only written from object's
destructor)
-\membersection{delete entries/groups}
-The functions in this section delete entries and/or groups of entries from the
-config file. {\it DeleteAll()} is especially useful if you want to erase all
-traces of your program presence: for example, when you uninstall it.
+\membersection{wxConfigBase::Get}\label{wxconfigbaseget}
-\func{bool}{DeleteEntry}{\param{const char *}{szKey}, \param{bool}{bDeleteGroupIfEmpty = TRUE}}
+\func{static wxConfigBase *}{Get}{\param{bool }{CreateOnDemand = true}}
-Deletes the specified entry and the group it belongs to if
-it was the last key in it and the second parameter is true.
+Get the current config object. If there is no current object and
+{\it CreateOnDemand} is true, creates one
+(using {\it Create}) unless DontCreateOnDemand was called previously.
-\func{bool }{DeleteGroup}{\param{const char *}{szKey}}
-Delete the group (with all subgroups)
+\membersection{wxConfigBase::GetAppName}\label{wxconfigbasegetappname}
-\func{bool }{DeleteAll}{\void}
+\constfunc{wxString}{GetAppName}{\void}
-Delete the whole underlying object (disk file, registry key, ...). Primarly
-for use by desinstallation routine.
+Returns the application name.
-\membersection{options}
-Some aspects of wxConfigBase behaviour can be changed during run-time. The
-first of them is the expansion of environment variables in the string values
-read from the config file: for example, if you have the following in your
-config file:
+\membersection{wxConfigBase::GetEntryType}\label{wxconfigbasegetentrytype}
+
+\constfunc{enum wxConfigBase::EntryType}{GetEntryType}{\param{const wxString\& }{name}}
+
+Returns the type of the given entry or {\it Unknown} if the entry doesn't
+exist. This function should be used to decide which version of Read() should
+be used because some of wxConfig implementations will complain about type
+mismatch otherwise: e.g., an attempt to read a string value from an integer
+key with wxRegConfig will fail.
+
+The result is an element of enum EntryType:
\begin{verbatim}
- # config file for my program
- UserData = $HOME/data
+ enum EntryType
+ {
+ Type_Unknown,
+ Type_String,
+ Type_Boolean,
+ Type_Integer,
+ Type_Float
+ };
+\end{verbatim}
- # the following syntax is valud only under Windows
- UserData = %windir%\\data.dat
+
+\membersection{wxConfigBase::GetFirstGroup}\label{wxconfigbasegetfirstgroup}
+
+\constfunc{bool}{GetFirstGroup}{\param{wxString\& }{str}, \param{long\&}{ index}}
+
+Gets the first group.
+
+\pythonnote{The wxPython version of this method returns a 3-tuple
+consisting of the continue flag, the value string, and the index for
+the next call.}
+
+\perlnote{In wxPerl this method takes no arguments and returns a 3-element
+list {\tt ( continue, str, index )}.}
+
+
+\membersection{wxConfigBase::GetFirstEntry}\label{wxconfigbasegetfirstentry}
+
+\constfunc{bool}{GetFirstEntry}{\param{wxString\& }{str}, \param{long\&}{ index}}
+
+Gets the first entry.
+
+\pythonnote{The wxPython version of this method returns a 3-tuple
+consisting of the continue flag, the value string, and the index for
+the next call.}
+
+\perlnote{In wxPerl this method takes no arguments and returns a 3-element
+list {\tt ( continue, str, index )}.}
+
+
+\membersection{wxConfigBase::GetNextGroup}\label{wxconfigbasegetnextgroup}
+
+\constfunc{bool}{GetNextGroup}{\param{wxString\& }{str}, \param{long\&}{ index}}
+
+Gets the next group.
+
+\pythonnote{The wxPython version of this method returns a 3-tuple
+consisting of the continue flag, the value string, and the index for
+the next call.}
+
+\perlnote{In wxPerl this method only takes the {\tt index} parameter
+and returns a 3-element list {\tt ( continue, str, index )}.}
+
+
+\membersection{wxConfigBase::GetNextEntry}\label{wxconfigbasegetnextentry}
+
+\constfunc{bool}{GetNextEntry}{\param{wxString\& }{str}, \param{long\&}{ index}}
+
+Gets the next entry.
+
+\pythonnote{The wxPython version of this method returns a 3-tuple
+consisting of the continue flag, the value string, and the index for
+the next call.}
+
+\perlnote{In wxPerl this method only takes the {\tt index} parameter
+and returns a 3-element list {\tt ( continue, str, index )}.}
+
+
+\membersection{wxConfigBase::GetNumberOfEntries}\label{wxconfigbasegetnumberofentries}
+
+\constfunc{uint }{GetNumberOfEntries}{\param{bool }{bRecursive = false}}
+
+
+\membersection{wxConfigBase::GetNumberOfGroups}\label{wxconfigbasegetnumberofgroups}
+
+\constfunc{uint}{GetNumberOfGroups}{\param{bool }{bRecursive = false}}
+
+Get number of entries/subgroups in the current group, with or without its
+subgroups.
+
+
+\membersection{wxConfigBase::GetPath}\label{wxconfigbasegetpath}
+
+\constfunc{const wxString\&}{GetPath}{\void}
+
+Retrieve the current path (always as absolute path).
+
+
+\membersection{wxConfigBase::GetVendorName}\label{wxconfigbasegetvendorname}
+
+\constfunc{wxString}{GetVendorName}{\void}
+
+Returns the vendor name.
+
+
+\membersection{wxConfigBase::HasEntry}\label{wxconfigbasehasentry}
+
+\constfunc{bool}{HasEntry}{\param{wxString\& }{strName}}
+
+returns \true if the entry by this name exists
+
+
+\membersection{wxConfigBase::HasGroup}\label{wxconfigbasehasgroup}
+
+\constfunc{bool}{HasGroup}{\param{const wxString\& }{strName}}
+
+returns \true if the group by this name exists
+
+
+\membersection{wxConfigBase::IsExpandingEnvVars}\label{wxconfigbaseisexpandingenvvars}
+
+\constfunc{bool}{IsExpandingEnvVars}{\void}
+
+Returns \true if we are expanding environment variables in key values.
+
+
+\membersection{wxConfigBase::IsRecordingDefaults}\label{wxconfigbaseisrecordingdefaults}
+
+\constfunc{bool}{IsRecordingDefaults}{\void}
+
+Returns \true if we are writing defaults back to the config file.
+
+
+\membersection{wxConfigBase::Read}\label{wxconfigbaseread}
+
+\constfunc{bool}{Read}{\param{const wxString\& }{key}, \param{wxString*}{ str}}
+
+Read a string from the key, returning \true if the value was read. If the key
+was not found, {\it str} is not changed.
+
+\constfunc{bool}{Read}{\param{const wxString\& }{key}, \param{wxString*}{ str}, \param{const wxString\& }{defaultVal}}
+
+Read a string from the key. The default value is returned if the key was not
+found.
+
+Returns \true if value was really read, \false if the default was used.
+
+\constfunc{wxString}{Read}{\param{const wxString\& }{key}, \param{const
+wxString\& }{defaultVal}}
+
+Another version of {\it Read()}, returning the string value directly.
+
+\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{long*}{ l}}
+
+Reads a long value, returning \true if the value was found. If the value was
+not found, {\it l} is not changed.
+
+\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{long*}{ l},
+\param{long}{ defaultVal}}
+
+Reads a long value, returning \true if the value was found. If the value was
+not found, {\it defaultVal} is used instead.
+
+\constfunc{long }{Read}{\param{const wxString\& }{key}, \param{long}{ defaultVal}}
+
+Reads a long value from the key and returns it. {\it defaultVal} is returned
+if the key is not found.
+
+NB: writing
+
+{\small
+\begin{verbatim}
+ conf->Read("key", 0);
\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 ;-)
+won't work because the call is ambiguous: compiler can not choose between two
+{\it Read} functions. Instead, write:
-Although this feature is very useful, it may be annoying if you read a value
-which containts '\$' or '\%' symbols (\% is used for environment variables
-expansion under Windows) which are not used for environment variable
-expansion. In this situation you may call SetExpandEnvVars(FALSE) just before
-reading this value and SetExpandEnvVars(TRUE) just after. Another solution
-would be to prefix the offending symbols with a backslash.
+{\small
+\begin{verbatim}
+ conf->Read("key", 0l);
+\end{verbatim}
+}
+
+\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{double*}{ d}}
+
+Reads a double value, returning \true if the value was found. If the value was
+not found, {\it d} is not changed.
+
+\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{double*}{ d},
+ \param{double}{ defaultVal}}
+
+Reads a double value, returning \true if the value was found. If the value was
+not found, {\it defaultVal} is used instead.
+
+\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{bool*}{ b}}
+
+Reads a bool value, returning \true if the value was found. If the value was
+not found, {\it b} is not changed.
+
+\constfunc{bool}{Read}{\param{const wxString\& }{ key}, \param{bool*}{ d},
+\param{bool}{ defaultVal}}
+
+Reads a bool value, returning \true if the value was found. If the value was
+not found, {\it defaultVal} is used instead.
+
+\pythonnote{In place of a single overloaded method name, wxPython
+implements the following methods:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf Read(key, default="")}}{Returns a string.}
+\twocolitem{{\bf ReadInt(key, default=0)}}{Returns an int.}
+\twocolitem{{\bf ReadFloat(key, default=0.0)}}{Returns a floating point number.}
+\end{twocollist}}
+}
+
+\perlnote{In place of a single overloaded method, wxPerl uses:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf Read(key, default="")}}{Returns a string}
+\twocolitem{{\bf ReadInt(key, default=0)}}{Returns an integer}
+\twocolitem{{\bf ReadFloat(key, default=0.0)}}{Returns a floating point number}
+\twocolitem{{\bf ReadBool(key, default=0)}}{Returns a boolean}
+\end{twocollist}
+}}
+
+
+\membersection{wxConfigBase::RenameEntry}\label{wxconfigbaserenameentry}
+
+\func{bool}{RenameEntry}{\param{const wxString\& }{ oldName}, \param{const wxString\& }{ newName}}
+
+Renames an entry in the current group. The entries names (both the old and
+the new one) shouldn't contain backslashes, i.e. only simple names and not
+arbitrary paths are accepted by this function.
+
+Returns \false if {\it oldName} doesn't exist or if {\it newName} already
+exists.
+
+
+\membersection{wxConfigBase::RenameGroup}\label{wxconfigbaserenamegroup}
+
+\func{bool}{RenameGroup}{\param{const wxString\& }{ oldName}, \param{const wxString\& }{ newName}}
+
+Renames a subgroup of the current group. The subgroup names (both the old and
+the new one) shouldn't contain backslashes, i.e. only simple names and not
+arbitrary paths are accepted by this function.
+
+Returns \false if {\it oldName} doesn't exist or if {\it newName} already
+exists.
+
+
+\membersection{wxConfigBase::Set}\label{wxconfigbaseset}
+
+\func{static wxConfigBase *}{Set}{\param{wxConfigBase *}{pConfig}}
+
+Sets the config object as the current one, returns the pointer to the previous
+current object (both the parameter and returned value may be NULL)
+
+
+\membersection{wxConfigBase::SetExpandEnvVars}\label{wxconfigbasesetexpandenvvars}
+
+\func{void}{SetExpandEnvVars }{\param{bool }{bDoIt = true}}
+
+Determine whether we wish to expand environment variables in key values.
+
+
+\membersection{wxConfigBase::SetPath}\label{wxconfigbasesetpath}
+
+\func{void}{SetPath}{\param{const wxString\& }{strPath}}
+
+Set current path: if the first character is '/', it is the absolute path,
+otherwise it is a relative path. '..' is supported. If strPath doesn't
+exist it is created.
+
+
+\membersection{wxConfigBase::SetRecordDefaults}\label{wxconfigbasesetrecorddefaults}
+
+\func{void}{SetRecordDefaults}{\param{bool }{bDoIt = true}}
+
+Sets whether defaults are recorded to the config file whenever an attempt to
+read the value which is not present in it is done.
+
+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::Write}\label{wxconfigbasewrite}
+
+\func{bool}{Write}{\param{const wxString\& }{ key}, \param{const wxString\& }{
+value}}
-Following functions control this option:
+\func{bool}{Write}{\param{const wxString\& }{ key}, \param{long}{ value}}
-\func{bool }{IsExpandingEnvVars}{\void} const
+\func{bool}{Write}{\param{const wxString\& }{ key}, \param{double}{ value}}
-\func{void }{SetExpandEnvVars }{\param{bool }{bDoIt = TRUE}}
+\func{bool}{Write}{\param{const wxString\& }{ key}, \param{bool}{ value}}
-The second option is recording of the default values: if it's 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.
+These functions write the specified value to the config file and return \true on success.
-Following functions control this option:
+\pythonnote{In place of a single overloaded method name, wxPython
+implements the following methods:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf Write(key, value)}}{Writes a string.}
+\twocolitem{{\bf WriteInt(key, value)}}{Writes an int.}
+\twocolitem{{\bf WriteFloat(key, value)}}{Writes a floating point number.}
+\end{twocollist}}
+}
-\func{void }{SetRecordDefaults }{\param{bool }{bDoIt = TRUE}}
+\perlnote{In place of a single overloaded method, wxPerl uses:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf Write(key, value)}}{Writes a string}
+\twocolitem{{\bf WriteInt(key, value)}}{Writes an integer}
+\twocolitem{{\bf WriteFloat(key, value)}}{Writes a floating point number}
+\twocolitem{{\bf WriteBool(key, value)}}{Writes a boolean}
+\end{twocollist}
+}}
-\func{bool }{IsRecordingDefaults }{\void} const
projects / wxWidgets.git / blobdiff