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

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%% Name:        hscrolledwindow.tex
%% Purpose:     wxHScrolledWindow Documentation
%% Author:      Bryan Petty
%% Modified by: 
%% Created:     2007-04-04
%% RCS-ID:      $Id$
%% Copyright:   (c) 2007 wxWidgets Team
%% License:     wxWindows Licence
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\section{\class{wxHScrolledWindow}}\label{wxhscrolledwindow}

In the name of this class, "H" stands for "horizontal" because it can be
used for scrolling columns of variable widths. It is not necessary to know
the widths of all columns in advance -- only those which are shown on the
screen need to be measured.

In any case, this is a generalization of the
\helpref{wxScrolledWindow}{wxscrolledwindow} class which can be only used when
all columns have the same widths. It lacks some other wxScrolledWindow features
however, notably it can't scroll only a rectangle of the window and not its
entire client area.

To use this class, you need to derive from it and implement the
\helpref{OnGetColumnWidth()}{wxvarhscrollhelperongetcolumnwidth} pure virtual
method. You also must call \helpref{SetColumnCount()}{wxvarhscrollhelpersetcolumncount}
to let the base class know how many columns it should display, but from that
moment on the scrolling is handled entirely by wxHScrolledWindow. You only
need to draw the visible part of contents in your {\tt OnPaint()} method as
usual. You should use \helpref{GetVisibleColumnsBegin()}{wxvarhscrollhelpergetvisiblecolumnsbegin}
and \helpref{GetVisibleColumnsEnd()}{wxvarhscrollhelpergetvisiblecolumnsend} to
select the lines to display. Note that the device context origin is not shifted
so the first visible column always appears at the point $(0, 0)$ in physical as
well as logical coordinates.

\wxheading{Derived from}

\helpref{wxPanel}{wxpanel}\\
\helpref{wxWindow}{wxwindow}\\
\helpref{wxEvtHandler}{wxevthandler}\\
\helpref{wxObject}{wxobject}

\helpref{wxVarHScrollHelper}{wxvarhscrollhelper}\\
\helpref{wxVarScrollHelperBase}{wxvarscrollhelperbase}

\wxheading{Include files}

<wx/vscroll.h>

\wxheading{Library}

\helpref{wxCore}{librarieslist}

\wxheading{See also}

\helpref{wxHVScrolledWindow}{wxhvscrolledwindow},
\rtfsp\helpref{wxVScrolledWindow}{wxvscrolledwindow}

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


\membersection{wxHScrolledWindow::wxHScrolledWindow}\label{wxhscrolledwindowwxhscrolledwindow}

\func{}{wxHScrolledWindow}{\void}

Default constructor, you must call \helpref{Create()}{wxhscrolledwindowcreate}
later.

\func{}{wxHScrolledWindow}{\param{wxWindow* }{parent}, \param{wxWindowID }{id = wxID\_ANY}, \param{const wxPoint\& }{pos = wxDefaultPosition}, \param{const wxSize\& }{size = wxDefaultSize}, \param{long }{style = 0}, \param{const wxString\& }{name = wxPanelNameStr}}

This is the normal constructor, no need to call {\tt Create()} after using this one.

Note that {\tt wxHSCROLL} is always automatically added to our style, there is
no need to specify it explicitly.

\wxheading{Parameters}

\docparam{parent}{The parent window, must not be {\tt NULL}}

\docparam{id}{The identifier of this window, {\tt wxID\_ANY} by default}

\docparam{pos}{The initial window position}

\docparam{size}{The initial window size}

\docparam{style}{The window style. There are no special style bits defined for
this class.}

\docparam{name}{The name for this window; usually not used}


\membersection{wxHScrolledWindow::Create}\label{wxhscrolledwindowcreate}

\func{bool}{Create}{\param{wxWindow* }{parent}, \param{wxWindowID }{id = wxID\_ANY}, \param{const wxPoint\& }{pos = wxDefaultPosition}, \param{const wxSize\& }{size = wxDefaultSize}, \param{long }{style = 0}, \param{const wxString\& }{name = wxPanelNameStr}}

Same as the \helpref{non-default constuctor}{wxhscrolledwindowwxhscrolledwindow}
but returns status code: {\tt true} if ok, {\tt false} if the window couldn't
be created.

Just as with the constructor above, the {\tt wxHSCROLL} style is always used,
there is no need to specify it explicitly.