updated and expanded wxLog docs

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

diff --git a/docs/latex/wx/text.tex b/docs/latex/wx/text.tex
index 2d5697d970a5c04bdeba328d15df2a7db4eb0bcd..09e9b045fae30caf85394da744b366e03ca4cd7d 100644 (file)
--- a/docs/latex/wx/text.tex
+++ b/docs/latex/wx/text.tex
@@ -36,16 +36,19 @@ style is ignored under other platforms.}
 \twocolitem{\windowstyle{wxTE\_AUTO\_URL}}{Highlight the URLs and generate the
 wxTextUrlEvents when mouse events occur over them. This style is supported
 under Win32 only and requires wxTE\_RICH.}
 \twocolitem{\windowstyle{wxTE\_AUTO\_URL}}{Highlight the URLs and generate the
 wxTextUrlEvents when mouse events occur over them. This style is supported
 under Win32 only and requires wxTE\_RICH.}

+\twocolitem{\windowstyle{wxTE\_NOHIDESEL}}{By default, the Windows text control
+doesn't show the selection when it doesn't have focus - use this style to force
+it to always show it. It doesn't do anything under other platforms.}

 \twocolitem{\windowstyle{wxHSCROLL}}{A horizontal scrollbar will be created. No effect under GTK+.}
 \end{twocollist}
 
 \twocolitem{\windowstyle{wxHSCROLL}}{A horizontal scrollbar will be created. No effect under GTK+.}
 \end{twocollist}
 

-See also \helpref{window styles overview}{windowstyles} and 
+See also \helpref{window styles overview}{windowstyles} and

 \helpref{wxTextCtrl::wxTextCtrl}{wxtextctrlconstr}.
 
 \helpref{wxTextCtrl::wxTextCtrl}{wxtextctrlconstr}.
 

-\wxheading{Remarks}
+\wxheading{wxTextCtrl and C++ streams}

 
 

-This class multiply-inherits from {\bf streambuf} where compilers allow, allowing code such as 
-the following:
+This class multiply-inherits from {\bf streambuf} where compilers allow,
+allowing code such as the following:

 
 {\small%
 \begin{verbatim}
 
 {\small%
 \begin{verbatim}


@@ -58,13 +61,62 @@ the following:
 \end{verbatim}
 }%
 
 \end{verbatim}
 }%
 

-If your compiler does not support derivation from {\bf streambuf} and gives a compile error, define the symbol 
-{\bf NO\_TEXT\_WINDOW\_STREAM} in the wxTextCtrl header file.
+If your compiler does not support derivation from {\bf streambuf} and gives a
+compile error, define the symbol {\bf NO\_TEXT\_WINDOW\_STREAM} in the
+wxTextCtrl header file.
+
+Note that independently of this setting you can always use wxTextCtrl itself
+in a stream-like manner:
+
+{\small%
+\begin{verbatim}
+  wxTextCtrl *control = new wxTextCtrl(...);
+
+  *control << 123.456 << " some text\n";
+\end{verbatim}
+}%
+
+always works. However the possibility to create an ostream associated with
+wxTextCtrl may be useful if you need to redirect the output of a function
+taking an ostream as parameter to a text control.
+
+Another commonly requested need is to redirect {\bf std::cout} to the text
+control. This could be done in the following way:

 
 

-% VZ: it is wrong to say that C++ iostreams are deprecated, we need a better
-%     wording here - disabling this for now
-%Note that any use of C++ iostreams (including this one) is deprecated and might
-%get completely removed in the future.
+{\small%
+\begin{verbatim}
+  #include <iostream>
+
+  wxTextCtrl *control = new wxTextCtrl(...);
+
+  std::streambuf *sbOld = std::cout.rdbuf();
+  std::cout.rdbuf(*control);
+
+  // use cout as usual, the output appears in the text control
+  ...
+
+  std::cout.rdbuf(sbOld);
+\end{verbatim}
+}%
+
+But wxWindows provides a convenient class to make it even simpler so instead
+you may just do
+
+{\small%
+\begin{verbatim}
+  #include <iostream>
+
+  wxTextCtrl *control = new wxTextCtrl(...);
+
+  wxStreamToTextRedirector redirect(control);
+
+  // all output to cout goes into the text control until the exit from current
+  // scope
+\end{verbatim}
+}%
+
+See \helpref{wxStreamToTextRedirector}{wxstreamtotextredirector} for more
+details.

 
 \wxheading{Event handling}
 
 
 \wxheading{Event handling}
 


@@ -83,12 +135,13 @@ when the text controls contents changes - whether this is due to user input or
 comes from the program itself (for example, if SetValue() is called)}
 \twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Respond to a wxEVT\_COMMAND\_TEXT\_ENTER event,
 generated when enter is pressed in a single-line text control.}
 comes from the program itself (for example, if SetValue() is called)}
 \twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Respond to a wxEVT\_COMMAND\_TEXT\_ENTER event,
 generated when enter is pressed in a single-line text control.}

+\twocolitem{{\bf EVT\_TEXT\_URL(id, func)}}{A mouse event occured over an URL
+in the text control (Win32 only)}
+\twocolitem{{\bf EVT\_TEXT\_MAXLEN(id, func)}}{User tried to enter more text
+into the control than the limit set by
+\helpref{SetMaxLength}{wxtextctrlsetmaxlength}.}

 \end{twocollist}%
 
 \end{twocollist}%
 

-%\wxheading{See also}
-%
-%\helpref{wxRichTextCtrl}{wxrichtextctrl}
-%

 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxTextCtrl::wxTextCtrl}\label{wxtextctrlconstr}
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxTextCtrl::wxTextCtrl}\label{wxtextctrlconstr}


@@ -315,6 +368,13 @@ working with controls that contain large amounts of text.
 Gets the current selection span. If the returned values are equal, there was
 no selection.
 
 Gets the current selection span. If the returned values are equal, there was
 no selection.
 

+Please note that the indices returned may be used with the other wxTextctrl
+methods but don't necessarily represent the correct indices into the string
+returned by \helpref{GetValue()}{wxtextctrlgetvalue} for multiline controls
+under Windows (at least,) you should use
+\helpref{GetStringSelection()}{wxtextctrlgetstringselection} to get the selected
+text.
+

 \wxheading{Parameters}
 
 \docparam{from}{The returned first position.}
 \wxheading{Parameters}
 
 \docparam{from}{The returned first position.}


@@ -327,6 +387,13 @@ consisting of the from and to values.}
 \perlnote{In wxPerl this method takes no parameter and returns a
 2-element list {\tt ( from, to )}.}
 
 \perlnote{In wxPerl this method takes no parameter and returns a
 2-element list {\tt ( from, to )}.}
 

+\membersection{wxTextCtrl::GetStringSelection}\label{wxtextctrlgetstringselection}
+
+\func{virtual wxString}{GetStringSelection}{\void}
+
+Gets the text currently selected in the control. If there is no selection, the
+returned string is empty.
+

 \membersection{wxTextCtrl::GetValue}\label{wxtextctrlgetvalue}
 
 \constfunc{wxString}{GetValue}{\void}
 \membersection{wxTextCtrl::GetValue}\label{wxtextctrlgetvalue}
 
 \constfunc{wxString}{GetValue}{\void}


@@ -514,6 +581,30 @@ Sets the insertion point at the given position.
 Sets the insertion point at the end of the text control. This is equivalent
 to \helpref{SetInsertionPoint}{wxtextctrlsetinsertionpoint}(\helpref{GetLastPosition}{wxtextctrlgetlastposition}()).
 
 Sets the insertion point at the end of the text control. This is equivalent
 to \helpref{SetInsertionPoint}{wxtextctrlsetinsertionpoint}(\helpref{GetLastPosition}{wxtextctrlgetlastposition}()).
 

+\membersection{wxTextCtrl::SetMaxLength}\label{wxtextctrlsetmaxlength}
+
+\func{virtual void}{SetMaxLength}{\param{unsigned long }{len}}
+
+This function sets the maximum number of characters the user can enter into the
+control. In other words, it allows to limit the text value length to {\it len}
+not counting the terminating {\tt NUL} character.
+
+If {\it len} is $0$, the previously set max length limi, if any, is discarded
+and the user may enter as much text as the underlying native text control
+widget supports (typically at least 32Kb).
+
+If the user tries to enter more characters into the text control when it
+already is filled up to the maximal length, a
+{\tt wxEVT\_COMMAND\_TEXT\_MAXLEN} event is sent to notify the program about it
+(giving it the possibility to show an explanatory message, for example) and the
+extra input is discarded.
+
+Note that this function may only be used with single line text controls.
+
+\wxheading{Compatibility}
+
+Only implemented in wxMSW/wxGTK starting with wxWindows 2.3.2.
+

 \membersection{wxTextCtrl::SetSelection}\label{wxtextctrlsetselection}
 
 \func{virtual void}{SetSelection}{\param{long}{ from}, \param{long}{ to}}
 \membersection{wxTextCtrl::SetSelection}\label{wxtextctrlsetselection}
 
 \func{virtual void}{SetSelection}{\param{long}{ from}, \param{long}{ to}}