added null pointer check and assert

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

\section{\class{wxTextValidator}}\label{wxtextvalidator}

wxTextValidator validates text controls, providing a variety of filtering behaviours.

For more information, please see \helpref{Validator overview}{validatoroverview}.

\wxheading{Derived from}

\helpref{wxValidator}{wxvalidator}\\
\helpref{wxEvtHandler}{wxevthandler}\\
\helpref{wxObject}{wxobject}

\wxheading{Include files}

<wx/valtext.h>

\wxheading{Library}

\helpref{wxCore}{librarieslist}

\wxheading{See also}

\helpref{Validator overview}{validatoroverview}, \helpref{wxValidator}{wxvalidator},
\helpref{wxGenericValidator}{wxgenericvalidator}

\latexignore{\rtfignore{\wxheading{Members}}}

\membersection{wxTextValidator::wxTextValidator}\label{wxtextvalidatorctor}

\func{}{wxTextValidator}{\param{const wxTextValidator\&}{ validator}}

Copy constructor.

\func{}{wxTextValidator}{\param{long}{ style = wxFILTER\_NONE}, \param{wxString* }{valPtr = NULL}}

Constructor, taking a style and optional pointer to a wxString variable.

\wxheading{Parameters}

\docparam{style}{A bitlist of flags, which can be:

\twocolwidtha{5cm}
\begin{twocollist}
\twocolitem{{\bf wxFILTER\_NONE}}{No filtering takes place.}
\twocolitem{{\bf wxFILTER\_ASCII}}{Non-ASCII characters are filtered out.}
\twocolitem{{\bf wxFILTER\_ALPHA}}{Non-alpha characters are filtered out.}
\twocolitem{{\bf wxFILTER\_ALPHANUMERIC}}{Non-alphanumeric characters are filtered out.}
\twocolitem{{\bf wxFILTER\_NUMERIC}}{Non-numeric characters are filtered out.}
\twocolitem{{\bf wxFILTER\_INCLUDE\_LIST}}{Use an include list. The validator
checks if the user input is on the list, complaining if not. See 
\helpref{wxTextValidator::SetIncludes}{wxtextvalidatorsetincludes}.}
\twocolitem{{\bf wxFILTER\_EXCLUDE\_LIST}}{Use an exclude list. The validator
checks if the user input is on the list, complaining if it is. See 
\helpref{wxTextValidator::SetExcludes}{wxtextvalidatorsetexcludes}.}
\twocolitem{{\bf wxFILTER\_INCLUDE\_CHAR\_LIST}}{Use an include list. The validator
checks if each input character is in the list (one character per list element), complaining if not.
See \helpref{wxTextValidator::SetIncludes}{wxtextvalidatorsetincludes}.}
\twocolitem{{\bf wxFILTER\_EXCLUDE\_CHAR\_LIST}}{Use an include list. The validator
checks if each input character is in the list (one character per list element), complaining if it is.
See \helpref{wxTextValidator::SetExcludes}{wxtextvalidatorsetexcludes}.}
\end{twocollist}
}

\docparam{valPtr}{A pointer to a wxString variable that contains the value. This variable
should have a lifetime equal to or longer than the validator lifetime (which is usually
determined by the lifetime of the window). % If NULL, the validator uses its own internal storage for the value. NOT true
}

\membersection{wxTextValidator::Clone}\label{wxtextvalidatorclone}

\constfunc{virtual wxValidator*}{Clone}{\void}

Clones the text validator using the copy constructor.

\membersection{wxTextValidator::GetExcludes}\label{wxtextvalidatorgetexcludes}

\constfunc{wxArrayString\&}{GetExcludes}{\void}

Returns a reference to the exclude list (the list of invalid values).

\membersection{wxTextValidator::GetIncludes}\label{wxtextvalidatorgetincludes}

\constfunc{wxArrayString\&}{GetIncludes}{\void}

Returns a reference to the include list (the list of valid values).

\membersection{wxTextValidator::GetStyle}\label{wxtextvalidatorgetstyle}

\constfunc{long}{GetStyle}{\void}

Returns the validator style.

\membersection{wxTextValidator::OnChar}\label{wxtextvalidatoronchar}

\func{void}{OnChar}{\param{wxKeyEvent\&}{ event}}

Receives character input from the window and filters it according to the
current validator style.

\membersection{wxTextValidator::SetExcludes}\label{wxtextvalidatorsetexcludes}

\func{void}{SetExcludes}{\param{const wxArrayString\&}{ stringList}}

Sets the exclude list (invalid values for the user input).

\membersection{wxTextValidator::SetIncludes}\label{wxtextvalidatorsetincludes}

\func{void}{SetIncludes}{\param{const wxArrayString\&}{ stringList}}

Sets the include list (valid values for the user input).

\membersection{wxTextValidator::SetStyle}\label{wxtextvalidatorsetstyle}

\func{void}{SetStyle}{\param{long}{ style}}

Sets the validator style.

\membersection{wxTextValidator::TransferFromWindow}\label{wxtextvalidatortransferfromwindow}

\func{virtual bool}{TransferFromWindow}{}

Transfers the value in the text control to the string.

\membersection{wxTextValidator::TransferToWindow}\label{wxtextvalidatortransfertowindow}

\func{virtual bool}{TransferToWindow}{}

Transfers the string value to the text control.

\membersection{wxTextValidator::Validate}\label{wxtextvalidatorvalidate}

\func{virtual bool}{Validate}{\param{wxWindow*}{ parent}}

Validates the window contents against the include or exclude lists, depending
on the validator style.