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

\section{\class{wxChoice}}\label{wxchoice}

A choice item is used to select one of a list of strings. Unlike a
listbox, only the selection is visible until the user pulls down the
menu of choices.

\wxheading{Derived from}

\helpref{wxControlWithItems}{wxcontrolwithitems}\\
\helpref{wxControl}{wxcontrol}\\
\helpref{wxWindow}{wxwindow}\\
\helpref{wxEvtHandler}{wxevthandler}\\
\helpref{wxObject}{wxobject}

\wxheading{Include files}

<wx/choice.h>

\wxheading{Window styles}

There are no special styles for wxChoice.

See also \helpref{window styles overview}{windowstyles}.

\wxheading{Event handling}

\twocolwidtha{7cm}
\begin{twocollist}\itemsep=0pt
\twocolitem{{\bf EVT\_CHOICE(id, func)}}{Process a wxEVT\_COMMAND\_CHOICE\_SELECTED event,
when an item on the list is selected.}
\end{twocollist}

\wxheading{See also}

\helpref{wxListBox}{wxlistbox}, \helpref{wxComboBox}{wxcombobox},
\rtfsp\helpref{wxCommandEvent}{wxcommandevent}

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

\membersection{wxChoice::wxChoice}\label{wxchoiceconstr}

\func{}{wxChoice}{\void}

Default constructor.

\func{}{wxChoice}{\param{wxWindow *}{parent}, \param{wxWindowID}{ id},\rtfsp
\param{const wxPoint\& }{pos}, \param{const wxSize\&}{ size},\rtfsp
\param{int}{ n}, \param{const wxString }{choices[]},\rtfsp
\param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``choice"}}

Constructor, creating and showing a choice.

\wxheading{Parameters}

\docparam{parent}{Parent window. Must not be NULL.}

\docparam{id}{Window identifier. A value of -1 indicates a default value.}

\docparam{pos}{Window position.}

\docparam{size}{Window size. If the default size (-1, -1) is specified then the choice is sized
appropriately.}

\docparam{n}{Number of strings with which to initialise the choice control.}

\docparam{choices}{An array of strings with which to initialise the choice control.}

\docparam{style}{Window style. See \helpref{wxChoice}{wxchoice}.}

\docparam{validator}{Window validator.}

\docparam{name}{Window name.}

\wxheading{See also}

\helpref{wxChoice::Create}{wxchoicecreate}, \helpref{wxValidator}{wxvalidator}

\pythonnote{The wxChoice constructor in wxPython reduces the {\tt n}
and {\tt choices} arguments are to a single argument, which is
a list of strings.}

\perlnote{In wxPerl there is just an array reference in place of {\tt n}
and {\tt choices}.}

\membersection{wxChoice::\destruct{wxChoice}}

\func{}{\destruct{wxChoice}}{\void}

Destructor, destroying the choice item.

\membersection{wxChoice::Create}\label{wxchoicecreate}

\func{bool}{Create}{\param{wxWindow *}{parent}, \param{wxWindowID}{ id},\rtfsp
\param{const wxPoint\& }{pos}, \param{const wxSize\&}{ size},\rtfsp
\param{int}{ n}, \param{const wxString }{choices[]},\rtfsp
\param{long}{ style = 0}, \param{const wxString\& }{name = ``choice"}}

Creates the choice for two-step construction. See \helpref{wxChoice::wxChoice}{wxchoiceconstr}.

\membersection{wxChoice::Delete}\label{wxchoicedelete}

\func{void}{Delete}{\param{int }{n}}

Deletes the item with the given index from the control.

\wxheading{Parameters}

\docparam{n}{The item to delete.}

\membersection{wxChoice::GetColumns}\label{wxchoicegetcolumns}

\constfunc{int}{GetColumns}{\void}

Gets the number of columns in this choice item.

\wxheading{Remarks}

This is implemented for Motif only and always returns $1$ for the other
platforms.

\membersection{wxChoice::SetColumns}\label{wxchoicesetcolumns}

\func{void}{SetColumns}{\param{int}{ n = 1}}

Sets the number of columns in this choice item.

\wxheading{Parameters}

\docparam{n}{Number of columns.}

\wxheading{Remarks}

This is implemented for Motif only and doesn't do anything under other
platforms.