Use const

[wxWidgets.git] / docs / latex / wx / textfile.tex

diff --git a/docs/latex/wx/textfile.tex b/docs/latex/wx/textfile.tex
index 0ffa822a364d59d02d3fea4696f239f3c16583c1..91fec37e02201b12223dfb11a7db4f82b01662fc 100644 (file)
--- a/docs/latex/wx/textfile.tex
+++ b/docs/latex/wx/textfile.tex
@@ -7,20 +7,21 @@ native" line termination sequences - in fact, it can be also used to modify the
 text files and change the line termination characters from one type (say DOS) to
 another (say Unix).
 
 text files and change the line termination characters from one type (say DOS) to
 another (say Unix).
 

-One word of warning: the class is not at all optimized for big files and so it
-will load the file entirely into memory when opened. Of course, you should not
+One word of warning: the class is not at all optimized for big files and thus
+it will load the file entirely into memory when opened. Of course, you should not

 work in this way with large files (as an estimation, anything over 1 Megabyte is
 surely too big for this class). On the other hand, it is not a serious
 work in this way with large files (as an estimation, anything over 1 Megabyte is
 surely too big for this class). On the other hand, it is not a serious

-limitation for the small files like configuration files or programs sources
+limitation for small files like configuration files or program sources

 which are well handled by wxTextFile.
 
 The typical things you may do with wxTextFile in order are:
 
 \begin{itemize}\itemsep=0pt
 which are well handled by wxTextFile.
 
 The typical things you may do with wxTextFile in order are:
 
 \begin{itemize}\itemsep=0pt

-\item Create and open it: this is done with \helpref{Open}{wxtextfileopen} 
-function which opens the file (name may be specified either as Open argument or
-in the constructor), reads its contents in memory and closes it. If all of these
-operations are successful, Open() will return TRUE and FALSE on error.
+\item Create and open it: this is done with either 
+\helpref{Create}{wxtextfilecreate} or \helpref{Open}{wxtextfileopen} 
+function which opens the file (name may be specified either as the argument to
+these functions or in the constructor), reads its contents in memory (in the
+case of {\tt Open()}) and closes it.

 \item Work with the lines in the file: this may be done either with "direct
 access" functions like \helpref{GetLineCount}{wxtextfilegetlinecount} and 
 \helpref{GetLine}{wxtextfilegetline} ({\it operator[]} does exactly the same
 \item Work with the lines in the file: this may be done either with "direct
 access" functions like \helpref{GetLineCount}{wxtextfilegetlinecount} and 
 \helpref{GetLine}{wxtextfilegetline} ({\it operator[]} does exactly the same


@@ -34,6 +35,7 @@ changed with \helpref{GoToLine}{wxtextfilegotoline}.
 \item Add/remove lines to the file: \helpref{AddLine}{wxtextfileaddline} and 
 \helpref{InsertLine}{wxtextfileinsertline} add new lines while 
 \helpref{RemoveLine}{wxtextfileremoveline} deletes the existing ones.
 \item Add/remove lines to the file: \helpref{AddLine}{wxtextfileaddline} and 
 \helpref{InsertLine}{wxtextfileinsertline} add new lines while 
 \helpref{RemoveLine}{wxtextfileremoveline} deletes the existing ones.

+\helpref{Clear}{wxtextfileclear} resets the file to empty.

 \item Save your changes: notice that the changes you make to the file will {\bf
 not} be saved automatically; calling \helpref{Close}{wxtextfileclose} or doing
 nothing discards them! To save the changes you must explicitly call 
 \item Save your changes: notice that the changes you make to the file will {\bf
 not} be saved automatically; calling \helpref{Close}{wxtextfileclose} or doing
 nothing discards them! To save the changes you must explicitly call 


@@ -45,9 +47,18 @@ termination type if you wish.
 
 No base class
 
 
 No base class
 

+\wxheading{Include files}
+
+<wx/textfile.h>
+
+\wxheading{Library}
+
+\helpref{wxBase}{librarieslist}
+

 \wxheading{Data structures}
 
 The following constants identify the line termination type:
 \wxheading{Data structures}
 
 The following constants identify the line termination type:

+

 \begin{verbatim}
 enum wxTextFileType
 {
 \begin{verbatim}
 enum wxTextFileType
 {


@@ -68,7 +79,8 @@ enum wxTextFileType
 
 \constfunc{}{wxTextFile}{\void}
 
 
 \constfunc{}{wxTextFile}{\void}
 

-Default constructor, use Open(string) to initialize the object.
+Default constructor, use \helpref{Create}{wxtextfilecreate} or 
+\helpref{Open}{wxtextfileopen} with a file name parameter to initialize the object.

 
 \membersection{wxTextFile::wxTextFile}\label{wxtextfilector}
 
 
 \membersection{wxTextFile::wxTextFile}\label{wxtextfilector}
 


@@ -76,26 +88,17 @@ Default constructor, use Open(string) to initialize the object.
 
 Constructor does not load the file into memory, use Open() to do it. 
 
 
 Constructor does not load the file into memory, use Open() to do it. 
 

-\membersection{wxTextFile::Exists}\label{wxtextfileexists}
-
-\constfunc{bool}{Exists}{\void}
-
-Return TRUE if file exists - the name of the file should have been specified
-in the constructor before calling Exists().
-
-\membersection{wxTextFile::Open}\label{wxtextfileopen}
+\membersection{wxTextFile::\destruct{wxTextFile}}\label{wxtextfiledtor}

 
 

-\constfunc{bool}{Open}{\void}
+\constfunc{}{\destruct{wxTextFile}}{\void}

 
 

-Open() opens the file with the name which was given in the \helpref{constructor}{wxtextfilector} 
-and also loads file in memory on success.
+Destructor does nothing.

 
 

-\membersection{wxTextFile::Open}\label{wxtextfileopenname}
+\membersection{wxTextFile::AddLine}\label{wxtextfileaddline}

 
 

-\constfunc{bool}{Open}{\param{const wxString\& }{strFile}}
+\constfunc{void}{AddLine}{\param{const wxString\& }{str}, \param{wxTextFileType }{type = typeDefault}}

 
 

-Same as \helpref{Open()}{wxtextfileopen} but allows to specify the file name
-(must be used if the default constructor was used to create the object).
+Adds a line to the end of file.

 
 \membersection{wxTextFile::Close}\label{wxtextfileclose}
 
 
 \membersection{wxTextFile::Close}\label{wxtextfileclose}
 


@@ -104,11 +107,31 @@ Same as \helpref{Open()}{wxtextfileopen} but allows to specify the file name
 Closes the file and frees memory, {\bf losing all changes}. Use \helpref{Write()}{wxtextfilewrite} 
 if you want to save them.
 
 Closes the file and frees memory, {\bf losing all changes}. Use \helpref{Write()}{wxtextfilewrite} 
 if you want to save them.
 

+\membersection{wxTextFile::Create}\label{wxtextfilecreate}
+
+\constfunc{bool}{Create}{\void}
+
+\constfunc{bool}{Create}{\param{const wxString\& }{strFile}}
+
+Creates the file with the given name or the name which was given in the
+\helpref{constructor}{wxtextfilector}. The array of file lines is initially
+empty.
+
+It will fail if the file already exists, \helpref{Open}{wxtextfileopen} should
+be used in this case.
+
+\membersection{wxTextFile::Exists}\label{wxtextfileexists}
+
+\constfunc{bool}{Exists}{\void}
+
+Return true if file exists - the name of the file should have been specified
+in the constructor before calling Exists().
+

 \membersection{wxTextFile::IsOpened}\label{wxtextfileisopened}
 
 \constfunc{bool}{IsOpened}{\void}
 
 \membersection{wxTextFile::IsOpened}\label{wxtextfileisopened}
 
 \constfunc{bool}{IsOpened}{\void}
 

-Returns TRUE if the file is currently opened.
+Returns true if the file is currently opened.

 
 \membersection{wxTextFile::GetLineCount}\label{wxtextfilegetlinecount}
 
 
 \membersection{wxTextFile::GetLineCount}\label{wxtextfilegetlinecount}
 


@@ -151,7 +174,18 @@ and used by \helpref{GetFirstLine()}{wxtextfilegetfirstline}/\helpref{GetNextLin
 
 \constfunc{bool}{Eof}{\void}
 
 
 \constfunc{bool}{Eof}{\void}
 

-Returns TRUE if the current line is the last one.
+Returns true if the current line is the last one.
+
+\membersection{wxTextFile::GetEOL}\label{wxtextfilegeteol}
+
+\constfunc{static const char*}{GetEOL}{\param{wxTextFileType }{type = typeDefault}}
+
+Get the line termination string corresponding to given constant. {\it typeDefault} is
+the value defined during the compilation and corresponds to the native format
+of the platform, i.e. it will be wxTextFileType\_Dos under Windows,
+wxTextFileType\_Unix under Unix (including Mac OS X when compiling with the
+Apple Developer Tools) and wxTextFileType\_Mac under Mac OS (including
+Mac OS X when compiling with CodeWarrior).

 
 \membersection{wxTextFile::GetFirstLine}\label{wxtextfilegetfirstline}
 
 
 \membersection{wxTextFile::GetFirstLine}\label{wxtextfilegetfirstline}
 


@@ -162,10 +196,13 @@ allows more "iterator-like" traversal of the list of lines, i.e. you may
 write something like:
 
 \begin{verbatim}
 write something like:
 
 \begin{verbatim}

-for ( str = GetFirstLine(); !Eof(); str = GetNextLine() )
+wxTextFile file;
+...
+for ( str = file.GetFirstLine(); !file.Eof(); str = file.GetNextLine() )

 {
     // do something with the current line in str
 }
 {
     // do something with the current line in str
 }

+// do something with the last line in str

 \end{verbatim}
 
 \membersection{wxTextFile::GetNextLine}\label{wxtextfilegetnextline}
 \end{verbatim}
 
 \membersection{wxTextFile::GetNextLine}\label{wxtextfilegetnextline}


@@ -185,7 +222,21 @@ Gets the previous line in the file.
 
 \func{wxString\&}{GetLastLine}{\void}
 
 
 \func{wxString\&}{GetLastLine}{\void}
 

-Gets the last line of the file.
+Gets the last line of the file. Together with 
+\helpref{GetPrevLine}{wxtextfilegetprevline} it allows to enumerate the lines
+in the file from the end to the beginning like this:
+
+\begin{verbatim}
+wxTextFile file;
+...
+for ( str = file.GetLastLine();
+      file.GetCurrentLine() > 0;
+      str = file.GetPrevLine() )
+{
+    // do something with the current line in str
+}
+// do something with the first line in str
+\end{verbatim}

 
 \membersection{wxTextFile::GetLineType}\label{wxtextfilegetlinetype}
 
 
 \membersection{wxTextFile::GetLineType}\label{wxtextfilegetlinetype}
 


@@ -207,44 +258,49 @@ be returned. If the detection mechanism fails wxTextFileType\_None is returned.
 
 Get the name of the file.
 
 
 Get the name of the file.
 

-\membersection{wxTextFile::AddLine}\label{wxtextfileaddline}
-
-\constfunc{void}{AddLine}{\param{const wxString\& }{str}, \param{wxTextFileType }{type = typeDefault}}
-
-Adds a line to the end of file.
-

 \membersection{wxTextFile::InsertLine}\label{wxtextfileinsertline}
 
 \constfunc{void}{InsertLine}{\param{const wxString\& }{str}, \param{size\_t }{n}, \param{wxTextFileType }{type = typeDefault}}
 
 Insert a line before the line number {\it n}.
 
 \membersection{wxTextFile::InsertLine}\label{wxtextfileinsertline}
 
 \constfunc{void}{InsertLine}{\param{const wxString\& }{str}, \param{size\_t }{n}, \param{wxTextFileType }{type = typeDefault}}
 
 Insert a line before the line number {\it n}.
 

+\membersection{wxTextFile::Open}\label{wxtextfileopen}
+
+\constfunc{bool}{Open}{\param{const wxMBConv\&}{ conv = wxConvAuto()}}
+
+\constfunc{bool}{Open}{\param{const wxString\& }{strFile}, \param{const wxMBConv\&}{ conv = wxConvAuto()}}
+
+Open() opens the file with the given name or the name which was given in the
+\helpref{constructor}{wxtextfilector} and also loads file in memory on
+success. It will fail if the file does not exist, 
+\helpref{Create}{wxtextfilecreate} should be used in this case.
+
+The {\it conv} argument is only meaningful in Unicode build of wxWidgets when
+it is used to convert the file to wide character representation.
+

 \membersection{wxTextFile::RemoveLine}\label{wxtextfileremoveline}
 
 \constfunc{void}{RemoveLine}{\param{size\_t }{n}}
 
 Delete line number {\it n} from the file.
 
 \membersection{wxTextFile::RemoveLine}\label{wxtextfileremoveline}
 
 \constfunc{void}{RemoveLine}{\param{size\_t }{n}}
 
 Delete line number {\it n} from the file.
 

+\membersection{wxTextFile::Clear}\label{wxtextfileclear}
+
+\constfunc{void}{Clear}{\void}
+
+Delete all lines from the file, set current line number to 0.
+

 \membersection{wxTextFile::Write}\label{wxtextfilewrite}
 
 \membersection{wxTextFile::Write}\label{wxtextfilewrite}
 

-\constfunc{bool}{Write}{\param{wxTextFileType }{typeNew = wxTextFileType\_None}}
+\constfunc{bool}{Write}{\param{wxTextFileType }{typeNew = wxTextFileType\_None}, \param{const wxMBConv\&}{ conv = wxConvAuto()}}

 
 Change the file on disk. The {\it typeNew} parameter allows you to change the
 file format (default argument means "don't change type") and may be used to
 convert, for example, DOS files to Unix.
 
 
 Change the file on disk. The {\it typeNew} parameter allows you to change the
 file format (default argument means "don't change type") and may be used to
 convert, for example, DOS files to Unix.
 

-\membersection{wxTextFile::GetEOL}\label{wxtextfilegeteol}
-
-\constfunc{static const char*}{GetEOL}{\param{wxTextFileType }{type = typeDefault}}
-
-Get the line termination string corresponding to given constant. {\it typeDefault} is
-the value defined during the compilation and corresponds to the native format of the
-platform, i.e. it will be wxTextFileType\_Dos under Windows, wxTextFileType\_Unix under
-Unix and wxTextFileType\_Mac under Mac.
-
-\membersection{wxTextFile::\destruct{wxTextFile}}\label{wxtextfiledtor}
-
-\constfunc{}{\destruct{wxTextFile}}{\void}
+The {\it conv} argument is only meaningful in Unicode build of wxWidgets when
+it is used to convert all lines to multibyte representation before writing them
+them to physical file.

 
 

-Destructor does nothing.
+Returns true if operation succeeded, false if it failed.