docs/latex/wx/dir.tex

   1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   2 %% Name:        dir.tex
   3 %% Purpose:     wxDir documentation
   4 %% Author:      Vadim Zeitlin
   5 %% Modified by:
   6 %% Created:     04.04.00
   7 %% RCS-ID:      $Id$
   8 %% Copyright:   (c) Vadim Zeitlin
   9 %% License:     wxWindows license
  10 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  11
  12 \section{\class{wxDir}}\label{wxdir}
  13
  14 wxDir is a portable equivalent of Unix {open/read/close}dir functions which
  15 allow enumerating of the files in a directory. wxDir allows to enumerate files
  16 as well as directories.
  17
  18 wxDir also provides a flexible way to enumerate files recursively using
  19 \helpref{Traverse}{wxdirtraverse} or a simpler
  20 \helpref{GetAllFiles}{wxdirgetallfiles} function.
  21
  22 Example of use:
  23
  24 \begin{verbatim}
  25     wxDir dir(wxGetCwd());
  26
  27     if ( !dir.IsOpened() )
  28     {
  29         // deal with the error here - wxDir would already log an error message
  30         // explaining the exact reason of the failure
  31         return;
  32     }
  33
  34     puts("Enumerating object files in current directory:");
  35
  36     wxString filename;
  37
  38     bool cont = dir.GetFirst(&filename, filespec, flags);
  39     while ( cont )
  40     {
  41         printf("%s\n", filename.c_str());
  42
  43         cont = dir.GetNext(&filename);
  44     }
  45 \end{verbatim}
  46
  47 \wxheading{Derived from}
  48
  49 No base class
  50
  51 \wxheading{Constants}
  52
  53 These flags define what kind of filename is included in the list of files
  54 enumerated by GetFirst/GetNext.
  55
  56 {\small
  57 \begin{verbatim}
  58 enum
  59 {
  60     wxDIR_FILES     = 0x0001,       // include files
  61     wxDIR_DIRS      = 0x0002,       // include directories
  62     wxDIR_HIDDEN    = 0x0004,       // include hidden files
  63     wxDIR_DOTDOT    = 0x0008,       // include '.' and '..'
  64
  65     // by default, enumerate everything except '.' and '..'
  66     wxDIR_DEFAULT   = wxDIR_FILES | wxDIR_DIRS | wxDIR_HIDDEN
  67 }
  68 \end{verbatim}
  69 }
  70
  71 \wxheading{Include files}
  72
  73 <wx/dir.h>
  74
  75 \latexignore{\rtfignore{\wxheading{Members}}}
  76
  77 \membersection{wxDir::wxDir}\label{wxdirwxdir}
  78
  79 \func{}{wxDir}{\void}
  80
  81 Default constructor, use \helpref{Open()}{wxdiropen} afterwards.
  82
  83 \func{}{wxDir}{\param{const wxString\& }{dir}}
  84
  85 Opens the directory for enumeration, use \helpref{IsOpened()}{wxdirisopened}
  86 to test for errors.
  87
  88
  89 \membersection{wxDir::\destruct{wxDir}}\label{wxdirdtor}
  90
  91 \func{}{\destruct{wxDir}}{\void}
  92
  93 Destructor cleans up the associated resources. It is not virtual and so this
  94 class is not meant to be used polymorphically.
  95
  96
  97 \membersection{wxDir::Exists}\label{wxdirexists}
  98
  99 \func{static bool}{Exists}{\param{const wxString\& }{dir}}
 100
 101 Test for existence of a directory with the given name
 102
 103
 104 \membersection{wxDir::GetAllFiles}\label{wxdirgetallfiles}
 105
 106 \func{static size\_t}{GetAllFiles}{\param{const wxString\& }{dirname}, \param{wxArrayString *}{files}, \param{const wxString\& }{filespec = wxEmptyString}, \param{int }{flags = wxDIR\_DEFAULT}}
 107
 108 The function appends the names of all the files under directory {\it dirname}
 109 to the array {\it files} (note that its old content is preserved). Only files
 110 matching the {\it filespec} are taken, with empty spec matching all the files.
 111
 112 The {\it flags} parameter should always include {\tt wxDIR\_FILES} or the array
 113 would be unchanged and should include {\tt wxDIR\_DIRS} flag to recurse into
 114 subdirectories (both flags are included in the value by default).
 115
 116 See also: \helpref{Traverse}{wxdirtraverse}
 117
 118
 119 \membersection{wxDir::GetFirst}\label{wxdirgetfirst}
 120
 121 \constfunc{bool}{GetFirst}{\param{wxString* }{filename}, \param{const wxString\& }{filespec = wxEmptyString}, \param{int }{flags = wxDIR\_DEFAULT}}
 122
 123 Start enumerating all files matching {\it filespec} (or all files if it is
 124 empty) and flags, return true on success.
 125
 126
 127 \membersection{wxDir::GetName}\label{wxdirgetname}
 128
 129 \constfunc{wxString}{GetName}{\void}
 130
 131 Returns the name of the directory itself. The returned string does not have the
 132 trailing path separator (slash or backslash).
 133
 134
 135 \membersection{wxDir::GetNext}\label{wxdirgetnext}
 136
 137 \constfunc{bool}{GetNext}{\param{wxString* }{filename}}
 138
 139 Continue enumerating files which satisfy the criteria specified by the last
 140 call to \helpref{GetFirst}{wxdirgetfirst}.
 141
 142
 143 \membersection{wxDir::HasFiles}\label{wxdirhasfiles}
 144
 145 \func{bool}{HasFiles}{\param{const wxString\& }{filespec = wxEmptyString}}
 146
 147 Returns {\tt true} if the directory contains any files matching the given
 148 {\it filespec}. If {\it filespec} is empty, look for any files at all. In any
 149 case, even hidden files are taken into account.
 150
 151
 152 \membersection{wxDir::HasSubDirs}\label{wxdirhassubdirs}
 153
 154 \func{bool}{HasSubDirs}{\param{const wxString\& }{dirspec = wxEmptyString}}
 155
 156 Returns {\tt true} if the directory contains any subdirectories (if a non
 157 empty {\it filespec} is given, only check for directories matching it).
 158 The hidden subdirectories are taken into account as well.
 159
 160
 161 \membersection{wxDir::IsOpened}\label{wxdirisopened}
 162
 163 \constfunc{bool}{IsOpened}{\void}
 164
 165 Returns true if the directory was successfully opened by a previous call to
 166 \helpref{Open}{wxdiropen}.
 167
 168
 169 \membersection{wxDir::Open}\label{wxdiropen}
 170
 171 \func{bool}{Open}{\param{const wxString\& }{dir}}
 172
 173 Open the directory for enumerating, returns {\tt true} on success
 174 or {\tt false} if an error occurred.
 175
 176
 177 \membersection{wxDir::Traverse}\label{wxdirtraverse}
 178
 179 \func{size\_t}{Traverse}{\param{wxDirTraverser\& }{sink}, \param{const wxString\& }{filespec = wxEmptyString}, \param{int }{flags = wxDIR\_DEFAULT}}
 180
 181 Enumerate all files and directories under the given directory recursively
 182 calling the element of the provided \helpref{wxDirTraverser}{wxdirtraverser}
 183 object for each of them.
 184
 185 More precisely, the function will really recurse into subdirectories if
 186 {\it flags} contains {\tt wxDIR\_DIRS} flag. It will ignore the files (but
 187 still possibly recurse into subdirectories) if {\tt wxDIR\_FILES} flag is
 188 given.
 189
 190 For each found directory, \helpref{sink.OnDir()}{wxdirtraverserondir} is called
 191 and \helpref{sink.OnFile()}{wxdirtraverseronfile} is called for every file.
 192 Depending on the return value, the enumeration may continue or stop.
 193
 194 The function returns the total number of files found or {\tt (size\_t)-1} on
 195 error.
 196
 197 See also: \helpref{GetAllFiles}{wxdirgetallfiles}
 198