Some doc corrections; removed wxDocument arg from wxView constructor;

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

\section{\class{wxTextDataObject}}\label{wxtextdataobject}

wxTextDataObject is a specialization of wxDataObject for text data. It can be
used without change to paste data into the \helpref{wxClipboard}{wxclipboard}
or a \helpref{wxDropSource}{wxdropsource}. A user may wish to derive a new class
from this class for providing text on-demand in order to minimize memory consumption
when offering data in several formats, such as plain text and RTF.

In order to offer text data on-demand \helpref{GetSize}{wxtextdataobjectgetsize} 
and \helpref{WriteData}{wxtextdataobjectwritedata} will have to be overridden.

\wxheading{Derived from}

\helpref{wxDataObject}{wxdataobject}

\wxheading{Include files}

<wx/dataobj.h>

\wxheading{See also}

\helpref{wxDataObject}{wxdataobject}

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

\membersection{wxTextDataObject::wxTextDataObject}\label{wxtextdataobjectwxtextdataobject}

\func{}{wxTextDataObject}{\void}

Default constructor. Call \helpref{SetText}{wxtextdataobjectsettext} later
or override \helpref{WriteData}{wxtextdataobjectwritedata} and 
\helpref{GetSize}{wxtextdataobjectgetsize} for providing data on-demand.

\func{}{wxTextDataObject}{\param{const wxString\& }{strText}}

Constructor, passing text.

\membersection{wxTextDataObject::GetSize}\label{wxtextdataobjectgetsize}

\constfunc{virtual size\_t}{GetSize}{\void}

Returns the data size. By default, returns the size of the text data
set in the constructor or using \helpref{SetText}{wxtextdataobjectsettext}.
This can be overridden to provide text size data on-demand. It is recommended
to return the text length plus 1 for a trailing zero, but this is not
strictly required.

\membersection{wxTextDataObject::GetText}\label{wxtextdataobjectgettext}

\constfunc{virtual wxString}{GetText}{\void}

Returns the text associated with the data object. You may wish to override
this method when offering data on-demand, but this is not required by
wxWindows' internals. Use this method to get data in text form from
the \helpref{wxClipboard}{wxclipboard}.

\membersection{wxTextDataObject::SetText}\label{wxtextdataobjectsettext}

\func{virtual void}{SetText}{\param{const wxString\& }{strText}}

Sets the text associated with the data object. This method is called
internally when retrieving data from the \helpref{wxClipboard}{wxclipboard}
and may be used to paste data to the clipboard directly (instead of
on-demand).

\membersection{wxTextDataObject::WriteData}\label{wxtextdataobjectwritedata}

\constfunc{virtual void}{WriteData}{\param{void}{*dest} }

Write the data owned by this class to {\it dest}. By default, this
calls \helpref{WriteString}{wxtextdataobjectwritestring} with the string
set in the constructor or using \helpref{SetText}{wxtextdataobjectsettext}.
This can be overridden to provide text data on-demand; in this case 
\helpref{WriteString}{wxtextdataobjectwritestring} must be called from
within the overriding WriteData() method.

\membersection{wxTextDataObject::WriteString}\label{wxtextdataobjectwritestring}

\constfunc{void}{WriteString}{\param{const wxString\& }{str}\param{void}{*dest} }

Writes the the string {\it str} to {\it dest}. This method must be called
from \helpref{WriteData}{wxtextdataobjectwritedata}.