5de76427c8
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@447 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
526 lines
15 KiB
TeX
526 lines
15 KiB
TeX
\section{\class{wxString}}\label{wxstring}
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\wxheading{Derived from}
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None
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\wxheading{See also}
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\overview{Overview}{wxstringoverview}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxString::wxString}\label{wxstringconstruct}
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\func{}{wxString}{\void}
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Default constructor.
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\func{}{wxString}{\param{const wxString\&}{ x}}
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Copy constructor.
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\func{}{wxString}{\param{char}{ ch}, \param{size\_t}{ n = 1}}
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Constructs a string of {\it n} copies of character {\it ch}.
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\func{}{wxString}{\param{const char*}{ psz}, \param{size\_t}{ nLength = STRING\_MAXLEN}}
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Takes first {\it nLength} characters from the C string {\it psz}.
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The default value of STRING\_MAXLEN means take all the string.
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\func{}{wxString}{\param{const unsigned char*}{ psz}, \param{size\_t}{ nLength = STRING\_MAXLEN}}
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For compilers using unsigned char: takes first {\it nLength} characters from the C string {\it psz}.
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The default value of STRING\_MAXLEN means take all the string.
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\func{}{wxString}{\param{const wchar\_t*}{ psz}}
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Constructs a string from the wide (UNICODE) string.
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\membersection{wxString::\destruct{wxString}}\label{wxstringdestruct}
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\func{}{\destruct{wxString}}{\void}
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String destructor. Note that this is not virtual, so wxString must not be inherited from.
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\membersection{wxString::Alloc}\label{wxstringAlloc}
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\func{void}{Alloc}{\param{uint}{ newsize}}
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Preallocate some space for wxString. Only works if the data of this string is not shared.
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\membersection{wxString::Append}\label{wxstringAppend}
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\func{wxString\&}{Append}{\param{const char*}{ psz}}
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Concatenates {\it psz} to this string, returning a reference to it.
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\func{wxString\&}{Append}{\param{char}{ ch}, \param{int}{ count = 1}}
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Concatenates character {\it ch} to this string, {\it count} times, returning a reference
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to it.
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\membersection{wxString::After}\label{wxstringAfter}
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\constfunc{wxString}{After}{\param{char}{ ch}}
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Gets all the characters after the first occurence of {\it ch}.
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Returns the empty string if {\it ch} is not found.
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\membersection{wxString::Before}\label{wxstringBefore}
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\constfunc{wxString}{Before}{\param{char}{ ch}}
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Gets all characters before the last occurence of {\it ch}.
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Returns empty string if {\it ch} is not found.
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\membersection{wxString::Cmp}\label{wxstringcmp}
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\constfunc{int}{Cmp}{\param{const char*}{ psz}}
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Case-sensitive comparison.
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Returns 0 if equal, +1 if greater or -1 if less.
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See also CmpNoCase, IsSameAs.
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\membersection{wxString::CmpNoCase}\label{wxstringcmpnocase}
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\constfunc{int}{CmpNoCase}{\param{const char*}{ psz}}
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Case-insensitive comparison.
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Returns 0 if equal, +1 if greater or -1 if less.
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See also Cmp, IsSameAs.
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\membersection{wxString::CompareTo}\label{wxstringCompareTo}
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\begin{verbatim}
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#define NO_POS ((int)(-1)) // undefined position
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enum caseCompare {exact, ignoreCase};
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\end{verbatim}
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\constfunc{int}{CompareTo}{\param{const char*}{ psz}, \param{caseCompare}{ cmp = exact}}
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Case-sensitive comparison. Returns 0 if equal, 1 if greater or -1 if less.
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\membersection{wxString::Contains}\label{wxstringContains}
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\func{bool}{Contains}{\param{const wxString\&}{ str}}
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Returns 1 if target appears anyhere in wxString; else 0.
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\membersection{wxString::Empty}\label{wxstringempty}
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\func{void}{Empty}{\void}
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Reinitializes the string and frees the data.
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\membersection{wxString::Find}\label{wxstringfind}
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\constfunc{int}{Find}{\param{char}{ ch}, \param{bool}{ fromEnd = FALSE}}
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Searches for the given character. Returns the starting index, or -1 if not found.
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\constfunc{int}{Find}{\param{const char*}{ sz}}
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Searches for the given string. Returns the starting index, or -1 if not found.
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\membersection{wxString::First}\label{wxstringfirst}
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\func{size\_t}{First}{\param{char}{ c}}
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\constfunc{size\_t}{First}{\param{const char*}{ psz}}
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\constfunc{size\_t}{First}{\param{const wxString\&}{ str}}
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\constfunc{size\_t}{First}{\param{const char}{ ch}}
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Returns the first occurrence of the item.
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\membersection{wxString::GetChar}\label{wxstringgetchar}
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\constfunc{char}{GetChar}{\param{size\_t}{ n}}
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Returns the character at position {\it n} (read-only).
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\membersection{wxString::GetData}\label{wxstringGetData}
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\constfunc{const char*}{GetData}{\void}
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wxWindows compatibility conversion. Returns a constant pointer to the data in the string.
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\membersection{wxString::GetWritableChar}\label{wxstringgetwritablechar}
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\func{char\&}{GetWritableChar}{\param{size\_t}{ n}}
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Returns a reference to the character at position {\it n}.
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\membersection{wxString::GetWriteBuf}\label{wxstringgetwritebuf}
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\func{char*}{GetWriteBuf}{\param{uint}{ len}}
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Returns a writable buffer of at least {\it len} bytes.
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Call \helpref{wxString::UngetWriteBuf}{wxstringungetwritebuf} as soon as possible
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to put the string back into a reasonable state.
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\membersection{wxString::Index}\label{wxstringIndex}
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\constfunc{size\_t}{Index}{\param{char}{ ch}, \param{int}{ startpos = 0}}
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Same as \helpref{wxString::Find}{wxstringfind}.
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\constfunc{size\_t}{Index}{\param{const char*}{ sz}}
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Same as \helpref{wxString::Find}{wxstringfind}.
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\constfunc{size\_t}{Index}{\param{const char*}{ sz}, \param{bool}{ caseSensitive = TRUE}, \param{bool}{ fromEnd = FALSE}}
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Search the element in the array, starting from either side.
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If {\it fromEnd} is TRUE, reverse search direction.
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If {\bf caseSensitive}, comparison is case sensitive (the default).
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Returns the index of the first item matched, or NOT\_FOUND.
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\membersection{wxString::Insert}\label{wxstringInsert}
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\func{void}{Insert}{\param{const wxString\&}{ str}, \param{uint}{ index}}
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Add new element at the given position.
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\membersection{wxString::IsAscii}\label{wxstringIsAscii}
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\constfunc{bool}{IsAscii}{\void}
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Returns TRUE if the string is ASCII.
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\membersection{wxString::IsEmpty}\label{wxstringisempty}
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\constfunc{bool}{IsEmpty}{\void}
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Returns TRUE if the string is NULL.
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\membersection{wxString::IsNull}\label{wxstringIsNull}
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\constfunc{bool}{IsNull}{\void}
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Returns TRUE if the string is NULL (same as IsEmpty).
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\membersection{wxString::IsNumber}\label{wxstringIsNumber}
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\constfunc{bool}{IsNumber}{\void}
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Returns TRUE if the string is a number.
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\membersection{wxString::IsSameAs}\label{wxstringissameas}
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\constfunc{bool}{IsSameAs}{\param{const char*}{ psz}, \param{bool}{ caseSensitive = TRUE}}
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Test for string equality, case-sensitive (default) or not.
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caseSensitive is TRUE by default (case matters).
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Returns TRUE if strings are equal, FALSE otherwise.
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See also Cmp, CmpNoCase.
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\membersection{wxString::IsWord}\label{wxstringIsWord}
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\constfunc{bool}{IsWord}{\void}
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Returns TRUE if the string is a word. TODO: what's the definition of a word?
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\membersection{wxString::Last}\label{wxstringLast}
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\constfunc{char}{Last}{\void}
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Returns the last character.
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\func{char\&}{Last}{\void}
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Returns a reference to the last character (writable).
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\membersection{wxString::Left}\label{wxstringleft}
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\constfunc{wxString}{Left}{\param{size\_t}{ count}}
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Returns the first {\it count} characters.
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\constfunc{wxString}{Left}{\param{char}{ ch}}
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Returns all characters before the first occurence of {\it ch}.
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Returns the whole string if {\it ch} is not found.
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\membersection{wxString::Len}\label{wxstringlen}
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\constfunc{size\_t}{Len}{\void}
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Returns the length of the string.
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\membersection{wxString::Length}\label{wxstringlength}
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\constfunc{size\_t}{Length}{\void}
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Returns the length of the string (same as Len).
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\membersection{wxString::LowerCase}\label{wxstringLowerCase}
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\func{void}{LowerCase}{\void}
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Same as MakeLower.
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\membersection{wxString::MakeLower}\label{wxstringmakelower}
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\func{void}{MakeLower}{\void}
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Converts all characters to lower case.
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\membersection{wxString::MakeUpper}\label{wxstringmakeupper}
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\func{void}{MakeUpper}{\void}
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Converts all characters to upper case.
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\membersection{wxString::Matches}\label{wxstringMatches}
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\constfunc{bool}{Matches}{\param{const char*}{ szMask}}
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Returns TRUE if the string contents matches a mask containing '*' and '?'.
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\membersection{wxString::Mid}\label{wxstringmid}
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\constfunc{wxString}{Mid}{\param{size\_t}{ first}, \param{size\_t}{ count = STRING\_MAXLEN}}
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Returns a substring starting at {\it first}, with length {\it count}, or the rest of
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the string if {\it count} is the default value.
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\membersection{wxString::Pad}\label{wxstringpad}
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\func{wxString\&}{Pad}{\param{size\_t}{ count}, \param{char}{ pad = ' '}, \param{bool}{ fromRight = TRUE}}
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Adds {\it count} copies of {\it pad} to the beginning, or to the end of the string (the default).
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Removes spaces from the left or from the right (default).
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\membersection{wxString::Prepend}\label{wxstringPrepend}
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\func{wxString\&}{Prepend}{\param{const wxString\&}{ str}}
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Prepends {\it str} to this string, returning a reference to this string.
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\membersection{wxString::Printf}\label{wxstringprintf}
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\func{int}{Printf}{\param{const char* }{pszFormat}, \param{}{...}}
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Similar to sprintf. Returns the number of characters written, or an integer less than zero
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on error.
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\membersection{wxString::PrintfV}\label{wxstringprintfv}
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\func{int}{PrintfV}{\param{const char* }{pszFormat}, \param{va\_list}{ argPtr}}
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Similar to vprintf. Returns the number of characters written, or an integer less than zero
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on error.
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\membersection{wxString::Remove}\label{wxstringRemove}
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\func{wxString\&}{Remove}{\param{size\_t}{ pos}}
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Same as Truncate. Removes the portion from {\it pos} to the end of the string.
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\func{wxString\&}{Remove}{\param{size\_t}{ pos}, \param{size\_t}{ len}}
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Removes the last {\it len} characters from the string, starting at {\it pos}.
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\membersection{wxString::RemoveLast}\label{wxstringremovelast}
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\func{wxString\&}{RemoveLast}{\void}
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Removes the last character.
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\membersection{wxString::Replace}\label{wxstringReplace}
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\func{uint}{Replace}{\param{const char*}{ szOld}, \param{const char*}{ szNew}, \param{bool}{ replaceAll}}
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Replace first (or all) occurences of substring with another one.
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{\it replaceAll}: global replace (default), or only the first occurence.
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Returns the number of replacements made.
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\membersection{wxString::Right}\label{wxstringright}
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\constfunc{wxString}{Right}{\param{size\_t}{ count}}
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Returns the last {\it count} characters.
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\constfunc{wxString}{Right}{\param{char}{ ch}}
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Returns all characters after the last occurence of {\it ch}.
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Returns the whole string if {\it ch} is not found.
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\membersection{wxString::SetChar}\label{wxstringsetchar}
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\func{void}{SetChar}{\param{size\_t}{ n}, \param{char}{ch}}
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Sets the character at position {\it n}.
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\membersection{wxString::Shrink}\label{wxstringshrink}
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\func{void}{Shrink}{\void}
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Minimizes the string's memory. Only works if the data of this string is not shared.
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\membersection{wxString::sprintf}\label{wxstringsprintf}
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\func{void}{sprintf}{\param{const char* }{ fmt}}
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The same as Printf.
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\membersection{wxString::Strip}\label{wxstringStrip}
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\begin{verbatim}
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enum stripType {leading = 0x1, trailing = 0x2, both = 0x3};
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\end{verbatim}
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\constfunc{wxString}{Strip}{\param{stripType}{ s = trailing}}
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Strip characters at the front and/or end. The same as Trim except that it
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doesn't change this string.
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\membersection{wxString::Trim}\label{wxstringtrim}
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\func{wxString\&}{Trim}{\param{bool}{ fromRight = TRUE}}
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Removes spaces from the left or from the right (default).
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\membersection{wxString::Truncate}\label{wxstringtruncate}
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\func{wxString\&}{Truncate}{\param{size\_t}{ len}}
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Truncate the string to the given length.
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\membersection{wxString::UngetWriteBuf}\label{wxstringungetwritebuf}
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\func{void}{UngetWriteBuf}{\void}
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Puts the string back into a reasonable state, after
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\rtfsp\helpref{wxString::GetWriteBuf}{wxstringgetwritebuf} was called.
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\membersection{wxString::UpperCase}\label{wxstringUpperCase}
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\func{void}{UpperCase}{\void}
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The same as MakeUpper.
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\membersection{wxString::operator $=$}\label{wxstringoperatorassign}
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\func{wxString\&}{operator $=$}{\param{const wxString\&}{ str}}
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\func{wxString\&}{operator $=$}{\param{const char*}{ psz}}
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\func{wxString\&}{operator $=$}{\param{char}{ c}}
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\func{wxString\&}{operator $=$}{\param{const unsigned char*}{ psz}}
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\func{wxString\&}{operator $=$}{\param{const wchar\_t*}{ pwz}}
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Assignment.
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\membersection{operator wxString::$+$}\label{wxstringoperatorplus}
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Concatenation.
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\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{const char*}{ y}}
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\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{char}{ y}}
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\func{wxString}{operator $+$}{\param{const char*}{ x}, \param{const wxString\&}{ y}}
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\membersection{wxString::operator $+=$}\label{wxstringPlusEqual}
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\func{void}{operator $+=$}{\param{const wxString\&}{ str}}
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\func{void}{operator $+=$}{\param{const char*}{ psz}}
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\func{void}{operator $+=$}{\param{char}{ c}}
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Concatenation.
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\membersection{wxString::operator []}\label{wxstringoperatorbracket}
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\func{char\&}{operator []}{\param{size\_t}{ i}}
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\func{char}{operator []}{\param{size\_t}{ i}}
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\func{char}{operator []}{\param{int}{ i}}
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Element extraction.
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\membersection{wxString::operator ()}\label{wxstringoperatorparenth}
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\func{wxString}{operator ()}{\param{size\_t}{ start}, \param{size\_t}{ len}}
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Same as Mid (substring extraction).
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\membersection{wxString::operator \cinsert}\label{wxstringoperatorout}
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\func{wxString\&}{operator \cinsert}{\\param{const wxString\&}{ str}}
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\func{wxString\&}{operator \cinsert}{\\param{const char*}{ psz}}
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\func{wxString\&}{operator \cinsert}{\\param{char }{ch}}
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Same as $+=$.
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\membersection{wxString::operator \cextract}\label{wxstringoperatorin}
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\func{friend istream\&}{operator \cextract}{\param{istream\&}{ is}, \param{wxString\&}{ str}}
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Extraction from a stream.
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\membersection{wxString::operator const char*}\label{wxstringoperatorconstcharpt}
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\constfunc{}{operator const char*}{\void}
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Implicit conversion to a C string.
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\membersection{Comparison operators}\label{wxstringComparison}
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\func{bool}{operator $==$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{bool}{operator $==$}{\param{const wxString\&}{ x}, \param{const char*}{ t}}
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\func{bool}{operator $!=$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{bool}{operator $!=$}{\param{const wxString\&}{ x}, \param{const char*}{ t}}
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\func{bool}{operator $>$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{bool}{operator $>$}{\param{const wxString\&}{ x}, \param{const char*}{ t}}
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\func{bool}{operator $>=$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{bool}{operator $>=$}{\param{const wxString\&}{ x}, \param{const char*}{ t}}
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\func{bool}{operator $<$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{bool}{operator $<$}{\param{const wxString\&}{ x}, \param{const char*}{ t}}
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\func{bool}{operator $<=$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
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\func{bool}{operator $<=$}{\param{const wxString\&}{ x}, \param{const char*}{ t}}
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\wxheading{Remarks}
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These comparisons are case-sensitive.
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