f7d886af3a
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12861 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
618 lines
20 KiB
TeX
618 lines
20 KiB
TeX
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%% Name: filename.tex
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%% Purpose: wxFileName documentation
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%% Author: Vadim Zeitlin
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%% Modified by:
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%% Created: 30.11.01
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%% RCS-ID: $Id$
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%% Copyright: (c) 2001 Vadim Zeitlin
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%% License: wxWindows license
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\section{\class{wxFileName}}\label{wxfilename}
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wxFileName encapsulates a file name. This class serves two purposes: first, it
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provides the functions to split the file names into components and to recombine
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these components in the full file name which can then be passed to the OS file
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functions (and \helpref{wxWindows functions}{filefunctions} wrapping them).
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Second, it includes the functions for working with the files itself. Note that
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to change the file data you should use \helpref{wxFile}{wxfile} class instead,
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wxFileName provides functions for working with the file attributes.
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\wxheading{Derived from}
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No base class
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\wxheading{Data structures}
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Many wxFileName methods accept the path format argument which is by\rtfsp
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{\tt wxPATH\_NATIVE} by default meaning to use the path format native for the
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current platform.
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The path format affects the operation of wxFileName functions in several ways:
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first and foremost, it defines the path separator character to use, but it also
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affects other things such as whether the path has the drive part or not.
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\begin{verbatim}
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enum wxPathFormat
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{
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wxPATH_NATIVE = 0, // the path format for the current platform
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wxPATH_UNIX,
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wxPATH_MAC,
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wxPATH_DOS,
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wxPATH_VMS,
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wxPATH_BEOS = wxPATH_UNIX,
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wxPATH_WIN = wxPATH_DOS,
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wxPATH_OS2 = wxPATH_DOS
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}
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\end{verbatim}
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The kind of normalization to do with the file name: these values can be
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or'd together to perform several operations at once in\rtfsp
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\helpref{Normalize}{wxfilenamenormalize}.
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\begin{verbatim}
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enum wxPathNormalize
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{
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wxPATH_NORM_ENV_VARS = 0x0001, // replace env vars with their values
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wxPATH_NORM_DOTS = 0x0002, // squeeze all .. and . and prepend cwd
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wxPATH_NORM_TILDE = 0x0004, // Unix only: replace ~ and ~user
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wxPATH_NORM_CASE = 0x0008, // if case insensitive => tolower
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wxPATH_NORM_ABSOLUTE = 0x0010, // make the path absolute
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wxPATH_NORM_LONG = 0x0020, // make the path the long form
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wxPATH_NORM_ALL = 0x003f
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}
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\end{verbatim}
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\latexignore{\rtfignore{\wxheading{Function groups}}}
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\membersection{File name format}
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wxFileName currently supports the file names in the Unix, DOS/Windows, Mac OS
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and VMS formats. Although these formats are quite different, wxFileName tries
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to treat them all in the sam generic way. It supposes that all file names
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consist of the following parts: the volume (also known as drive under Windows
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or device under VMS), the path which is a sequence of directory names separated
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by the \helpref{path separators}{wxfilenamegetpathseparators} and the full
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filename itself which, in turn, is composed from the base file name and the
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extension. All of the individual components of the file name may be empty and,
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for example, the volume name is always empty under Unix, but if they are all
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empty simultaneously, the filename object is considered to be in an invalid
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state and \helpref{IsOk}{wxfilenameisok} returns {\tt FALSE} for it.
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File names can be case-sensitive or not, the function\rtfsp
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\helpref{IsCaseSensitive}{wxfilenameiscasesensitive} allows to determine this.
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The rules for determining if the file name is absolute or relative also depends
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on the file name format and the only portable way to answer to this question is
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to use \helpref{IsAbsolute}{wxfilenameisabsolute} method. To ensure that the
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filename is absolute you may use \helpref{Normalize}{wxfilenamenormalize}. There
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is also an inverse function \helpref{MakeRelativeTo}{wxfilenamemakerelativeto}
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which undoes what \helpref{Normalize(wxPATH\_NORM\_DOTS}{wxfilenamenormalize}
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does.
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Other functions returning information about the file format provided by this
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class are \helpref{GetVolumeSeparator}{wxfilenamegetvolumeseparator},\rtfsp
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\helpref{IsPathSeparator}{wxfilenameispathseparator} and\rtfsp
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\helpref{IsWild}{wxfilenameiswild}.
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\helpref{IsRelative}{wxfilenameisrelative}
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\membersection{File name construction}
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TODO.
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\membersection{File tests}
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Before doing the other tests you should use \helpref{IsOk}{wxfilenameisok} to
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verify that the filename is well defined. If it is,
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\helpref{FileExists}{wxfilenamefileexists} can be used to test if a file with
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such name exists and \helpref{DirExists}{wxfilenamedirexists} - if a directory
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with this name exists.
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File names should be compared using \helpref{SameAs}{wxfilenamesameas} method
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or \helpref{$==$}{wxfilenameoperatorequal}.
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\membersection{File name components}
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These functions allow to examine and modify the directories of the path:
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\helpref{AppendDir}{wxfilenameappenddir}\\
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\helpref{InsertDir}{wxfilenameinsertdir}\\
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\helpref{GetDirCount}{wxfilenamegetdircount}
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\helpref{PrependDir}{wxfilenameprependdir}\\
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\helpref{RemoveDir}{wxfilenameremovedir}
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To change the components of the file name individually you can use the
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following functions:
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\helpref{GetExt}{wxfilenamegetext}\\
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\helpref{GetName}{wxfilenamegetname}\\
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\helpref{GetVolume}{wxfilenamegetvolume}\\
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\helpref{HasExt}{wxfilenamehasext}\\
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\helpref{HasName}{wxfilenamehasname}\\
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\helpref{HasVolume}{wxfilenamehasvolume}\\
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\helpref{SetExt}{wxfilenamesetext}\\
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\helpref{SetName}{wxfilenamesetname}\\
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\helpref{SetVolume}{wxfilenamesetvolume}\\
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\membersection{Operations}
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These methods allow to work with the file creation, access and modification
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times:
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\helpref{GetModificationTime}{wxfilenamegetmodificationtime}\\
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\helpref{GetTimes}{wxfilenamegettimes}\\
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\helpref{SetTimes}{wxfilenamesettimes}\\
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\helpref{Touch}{wxfilenametouch}
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Other file system operations functions are:
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\helpref{Mkdir}{wxfilenamemkdir}\\
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\helpref{Rmdir}{wxfilenamermdir}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxFileName::wxFileName}\label{wxfilenamewxfilename}
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\func{}{wxFileName}{\void}
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Default constructor.
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\func{}{wxFileName}{\param{const wxFileName\& }{filename}}
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Copy constructor.
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\func{}{wxFileName}{\param{const wxString\& }{fullpath}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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From a full filename: if it terminates with a '/', a directory path
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is contructed (the name will be empty), otherwise a file name and
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extension are extracted from it
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\func{}{wxFileName}{\param{const wxString\& }{path}, \param{const wxString\& }{name}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Constructor from a directory name and a file name.
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\func{}{wxFileName}{\param{const wxString\& }{path}, \param{const wxString\& }{name}, \param{const wxString\& }{ext}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Constructor from a directory name, base file name and extension
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\func{}{wxFileName}{\param{const wxString\& }{volume}, \param{const wxString\& }{path}, \param{const wxString\& }{name}, \param{const wxString\& }{ext}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Constructor from a volume name, a directory name, base file name and extension
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\membersection{wxFileName::AppendDir}\label{wxfilenameappenddir}
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\func{void}{AppendDir}{\param{const wxString\& }{dir}}
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\membersection{wxFileName::Assign}\label{wxfilenameassign}
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\func{void}{Assign}{\param{const wxFileName\& }{filepath}}
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\func{void}{Assign}{\param{const wxString\& }{fullpath}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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\func{void}{Assign}{\param{const wxString\& }{volume}, \param{const wxString\& }{path}, \param{const wxString\& }{name}, \param{const wxString\& }{ext}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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\func{void}{Assign}{\param{const wxString\& }{path}, \param{const wxString\& }{name}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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\func{void}{Assign}{\param{const wxString\& }{path}, \param{const wxString\& }{name}, \param{const wxString\& }{ext}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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\membersection{wxFileName::AssignCwd}\label{wxfilenameassigncwd}
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\func{void}{AssignCwd}{\param{const wxString\& }{volume = ""}}
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Makes this object refer to the current working directory on the specified
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volume (or current volume if {\it volume} is empty).
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\wxheading{See also}
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\helpref{GetCwd}{wxfilenamegetcwd}
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\membersection{wxFileName::AssignDir}\label{wxfilenameassigndir}
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\func{void}{AssignDir}{\param{const wxString\& }{dir}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Set this file name object to the given directory name. The name and extension
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will be empty.
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\membersection{wxFileName::AssignHomeDir}\label{wxfilenameassignhomedir}
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\func{void}{AssignHomeDir}{\void}
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Set this file name object to the home directory.
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\membersection{wxFileName::AssignTempFileName}\label{wxfilenameassigntempfilename}
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\func{void}{AssignTempFileName}{\param{const wxString\& }{prefix}}
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The function calls \helpref{CreateTempFileName}{wxfilenamecreatetempfilename} to
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create a temporary file and sets this object to the name of the file. If a
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temporary file couldn't be created, the object is put into the\rtfsp
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\helpref{invalid}{wxfilenameisok} state.
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\membersection{wxFileName::Clear}\label{wxfilenameclear}
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\func{void}{Clear}{\void}
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Reset all components to default, uninitialized state.
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\membersection{wxFileName::CreateTempFileName}\label{wxfilenamecreatetempfilename}
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\func{static wxString}{CreateTempFileName}{\param{const wxString\& }{prefix}}
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Returns a temporary file name starting with the given {\it prefix}. If
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the {\it prefix} is an absolute path, the temporary file is created in this
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directory, otherwise it is created in the default system directory for the
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temporary files or in the current directory.
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If the function succeeds, the temporary file is actually created (but not
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opened) as well. Under Unix, it will have read and write permissions for the
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owner only.
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\wxheading{Return value}
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The full temporary file name or an empty string on error.
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\membersection{wxFileName::DirExists}\label{wxfilenamedirexists}
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\func{bool}{DirExists}{\void}
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\func{bool}{DirExists}{\param{const wxString\& }{dir}}
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Does the directory with this name exists?
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\membersection{wxFileName::DirName}\label{wxfilenamedirname}
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\func{wxFileName}{DirName}{\param{const wxString\& }{dir}}
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\membersection{wxFileName::FileExists}\label{wxfilenamefileexists}
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\func{bool}{FileExists}{\void}
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\func{bool}{FileExists}{\param{const wxString\& }{file}}
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Does the file with this name exists?
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\membersection{wxFileName::FileName}\label{wxfilenamefilename}
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\func{wxFileName}{FileName}{\param{const wxString\& }{file}}
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static pseudo constructors
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\membersection{wxFileName::GetCwd}\label{wxfilenamegetcwd}
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\func{wxString}{GetCwd}{\param{const wxString\& }{volume = ""}}
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Retrieve the value of the current working directory on the specified volume. If
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the volume is empty, the programs current working directory is returned for the
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current volume.
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\wxheading{Return value}
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The string containing the current working directory or an empty string on
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error.
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\wxheading{See also}
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\helpref{AssignCwd}{wxfilenameassigncwd}
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\membersection{wxFileName::GetDirCount}\label{wxfilenamegetdircount}
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\constfunc{size\_t}{GetDirCount}{\void}
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\membersection{wxFileName::GetDirs}\label{wxfilenamegetdirs}
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\constfunc{const wxArrayString\&}{GetDirs}{\void}
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\membersection{wxFileName::GetExt}\label{wxfilenamegetext}
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\constfunc{wxString}{GetExt}{\void}
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\membersection{wxFileName::GetFormat}\label{wxfilenamegetformat}
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\func{wxPathFormat}{GetFormat}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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various helpers
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get the canonical path format for this platform
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\membersection{wxFileName::GetFullName}\label{wxfilenamegetfullname}
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\constfunc{wxString}{GetFullName}{\void}
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\membersection{wxFileName::GetFullPath}\label{wxfilenamegetfullpath}
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\constfunc{wxString}{GetFullPath}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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add separator Construct full path with name and ext
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\membersection{wxFileName::GetHomeDir}\label{wxfilenamegethomedir}
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\func{wxString}{GetHomeDir}{\void}
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\membersection{wxFileName::GetLongPath}\label{wxfilenamegetlongpath}
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\constfunc{wxString}{GetLongPath}{\void}
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Return the long form of the path (returns identity on non-Windows platforms)
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\membersection{wxFileName::GetModificationTime}\label{wxfilenamegetmodificationtime}
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\constfunc{wxDateTime}{GetModificationTime}{\void}
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convenience wrapper: get just the last mod time of the file
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\membersection{wxFileName::GetName}\label{wxfilenamegetname}
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\constfunc{wxString}{GetName}{\void}
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\membersection{wxFileName::GetPath}\label{wxfilenamegetpath}
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\constfunc{wxString}{GetPath}{\param{bool }{add\_separator = FALSE}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Construct path only - possibly with the trailing separator
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\membersection{wxFileName::GetPathSeparators}\label{wxfilenamegetpathseparators}
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\func{wxString}{GetPathSeparators}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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get the string of path separators for this format
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\membersection{wxFileName::GetPathWithSep}\label{wxfilenamegetpathwithsep}
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\constfunc{wxString}{GetPathWithSep}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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more readable synonym
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\membersection{wxFileName::GetShortPath}\label{wxfilenamegetshortpath}
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\constfunc{wxString}{GetShortPath}{\void}
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Return the short form of the path (returns identity on non-Windows platforms)
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\membersection{wxFileName::GetTimes}\label{wxfilenamegettimes}
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\constfunc{bool}{GetTimes}{\param{wxDateTime* }{dtAccess}, \param{wxDateTime* }{dtMod}, \param{wxDateTime* }{dtChange}}
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return the last access, last modification and last change times
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(any of the pointers may be NULL)
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\membersection{wxFileName::GetVolume}\label{wxfilenamegetvolume}
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\constfunc{wxString}{GetVolume}{\void}
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\membersection{wxFileName::GetVolumeSeparator}\label{wxfilenamegetvolumeseparator}
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\func{wxString}{GetVolumeSeparator}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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get the string separating the volume from the path for this format
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\membersection{wxFileName::HasExt}\label{wxfilenamehasext}
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\constfunc{bool}{HasExt}{\void}
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\membersection{wxFileName::HasName}\label{wxfilenamehasname}
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\constfunc{bool}{HasName}{\void}
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\membersection{wxFileName::HasVolume}\label{wxfilenamehasvolume}
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\constfunc{bool}{HasVolume}{\void}
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\membersection{wxFileName::InsertDir}\label{wxfilenameinsertdir}
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\func{void}{InsertDir}{\param{int }{before}, \param{const wxString\& }{dir}}
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\membersection{wxFileName::IsAbsolute}\label{wxfilenameisabsolute}
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\func{bool}{IsAbsolute}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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is this filename absolute?
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\membersection{wxFileName::IsCaseSensitive}\label{wxfilenameiscasesensitive}
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\func{bool}{IsCaseSensitive}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Tests
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are the file names of this type cases sensitive?
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\membersection{wxFileName::IsOk}\label{wxfilenameisok}
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\constfunc{bool}{IsOk}{\void}
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Returns {\tt TRUE} if the filename is valid, {\tt FALSE} if it is not
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initialized yet. The assignment functions and
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\helpref{Clear}{wxfilenameclear} may reset the object to the uninitialized,
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invalid state (the former only do it on failure).
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\membersection{wxFileName::IsPathSeparator}\label{wxfilenameispathseparator}
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\func{bool}{IsPathSeparator}{\param{wxChar }{ch}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Returns {\tt TRUE} if the char is a path separator for this format.
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\membersection{wxFileName::IsRelative}\label{wxfilenameisrelative}
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\func{bool}{IsRelative}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Returns {\tt TRUE} if this filename is not absolute.
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\membersection{wxFileName::IsWild}\label{wxfilenameiswild}
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\func{bool}{IsWild}{\param{wxPathFormat }{format = wxPATH\_NATIVE}}
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FIXME: what exactly does this do?
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\membersection{wxFileName::MakeRelativeTo}\label{wxfilenamemakerelativeto}
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\func{bool}{MakeRelativeTo}{\param{const wxString\& }{pathBase = ""}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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This function tries to put this file name in a form relative to {\it pathBase}.
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In other words, it returns the file name which should be used to access this
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file if the current directory were {\it pathBase}.
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\docparam{pathBase}{the directory to use as root, current directory is used by
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default}
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\docparam{format}{the file name format, native by default}
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\wxheading{Return value}
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{\tt TRUE} if the file name has been changed, {\tt FALSE} if we failed to do
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anything with it (currently this only happens if the file name is on a volume
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different from the volume specified by {\it pathBase}).
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\wxheading{See also}
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\helpref{Normalize}{wxfilenamenormalize}
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\membersection{wxFileName::Mkdir}\label{wxfilenamemkdir}
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\func{bool}{Mkdir}{\param{int }{perm = 0777}, \param{bool }{full = FALSE}}
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\func{static bool}{Mkdir}{\param{const wxString\& }{dir}, \param{int }{perm = 0777}, \param{bool }{full = FALSE}}
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\docparam{dir}{the directory to create}
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\docparam{parm}{the permissions for the newly created directory}
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\docparam{full}{if {\tt TRUE}, will try to make each directory in the path}
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\wxheading{Return value}
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Returns {\tt TRUE} if the directory was successfully created, {\tt FALSE}
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otherwise.
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\membersection{wxFileName::Normalize}\label{wxfilenamenormalize}
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\func{bool}{Normalize}{\param{wxPathNormalize }{flags = wxPATH\_NORM\_ALL}, \param{const wxString\& }{cwd = wxEmptyString}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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operations on the path
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normalize the path: with the default flags value, the path will be
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made absolute, without any ".." and "." and all environment
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variables will be expanded in it
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this may be done using another (than current) value of cwd
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\membersection{wxFileName::PrependDir}\label{wxfilenameprependdir}
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\func{void}{PrependDir}{\param{const wxString\& }{dir}}
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\membersection{wxFileName::RemoveDir}\label{wxfilenameremovedir}
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\func{void}{RemoveDir}{\param{int }{pos}}
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\membersection{wxFileName::Rmdir}\label{wxfilenamermdir}
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\func{bool}{Rmdir}{\void}
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\func{static bool}{Rmdir}{\param{const wxString\& }{dir}}
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Deletes the specified directory.
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\membersection{wxFileName::SameAs}\label{wxfilenamesameas}
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\func{bool}{SameAs}{\param{const wxFileName\& }{filepath}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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Compares the filename using the rules of this platform
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\membersection{wxFileName::SetCwd}\label{wxfilenamesetcwd}
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\func{bool}{SetCwd}{\void}
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\func{static bool}{SetCwd}{\param{const wxString\& }{cwd}}
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change the current working directory
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\membersection{wxFileName::SetExt}\label{wxfilenamesetext}
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\func{void}{SetExt}{\param{const wxString\& }{ext}}
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\membersection{wxFileName::SetFullName}\label{wxfilenamesetfullname}
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\func{void}{SetFullName}{\param{const wxString\& }{fullname}}
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full name is the file name + extension (but without the path)
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\membersection{wxFileName::SetName}\label{wxfilenamesetname}
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\func{void}{SetName}{\param{const wxString\& }{name}}
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\membersection{wxFileName::SetTimes}\label{wxfilenamesettimes}
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\func{bool}{SetTimes}{\param{const wxDateTime* }{dtCreate}, \param{const wxDateTime* }{dtAccess}, \param{const wxDateTime* }{dtMod}}
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set the file creation and last access/mod times
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(any of the pointers may be NULL)
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\membersection{wxFileName::SetVolume}\label{wxfilenamesetvolume}
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\func{void}{SetVolume}{\param{const wxString\& }{volume}}
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\membersection{wxFileName::SplitPath}\label{wxfilenamesplitpath}
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\func{void}{SplitPath}{\param{const wxString\& }{fullpath}, \param{wxString* }{volume}, \param{wxString* }{path}, \param{wxString* }{name}, \param{wxString* }{ext}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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\func{void}{SplitPath}{\param{const wxString\& }{fullpath}, \param{wxString* }{path}, \param{wxString* }{name}, \param{wxString* }{ext}, \param{wxPathFormat }{format = wxPATH\_NATIVE}}
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split a fullpath into the volume, path, (base) name and extension
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(all of the pointers can be NULL)
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\membersection{wxFileName::Touch}\label{wxfilenametouch}
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\func{bool}{Touch}{\void}
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set the access and modification times to the current moment
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\membersection{wxFileName::operator=}\label{wxfilenameoperatorassign}
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\func{wxFileName\& operator}{operator=}{\param{const wxFileName\& }{filename}}
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\func{wxFileName\& operator}{operator=}{\param{const wxString\& }{filename}}
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Assigns the new value to this filename object.
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\membersection{wxFileName::operator==}\label{wxfilenameoperatorequal}
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\func{bool operator}{operator==}{\param{const wxFileName\& }{filename}}
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\func{bool operator}{operator==}{\param{const wxString\& }{filename}}
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Returns {\tt TRUE} if the filenames are equal for the native file format.
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