extracted the scroll events docs in a single file which is now included by all the others

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16128 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/scrolbar.tex

@@ -49,22 +49,7 @@ to the size of the window and the size of the data.
 
 See also \helpref{window styles overview}{windowstyles}.
 
-\wxheading{Event handling}
-
-To process input from a scrollbar, use one of these event handler macros to direct input to member
-functions that take a \helpref{wxScrollEvent}{wxscrollevent} argument:
-
-\twocolwidtha{7cm}
-\begin{twocollist}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL(id, func)}}{Catch all scroll commands.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_TOP(id, func)}}{Catch a command to put the scroll thumb at the maximum position.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_BOTTOM(id, func)}}{Catch a command to put the scroll thumb at the maximum position.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_LINEUP(id, func)}}{Catch a line up command.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_LINEDOWN(id, func)}}{Catch a line down command.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_PAGEUP(id, func)}}{Catch a page up command.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_PAGEDOWN(id, func)}}{Catch a page down command.}
-\twocolitem{{\bf EVT\_COMMAND\_SCROLL\_THUMBTRACK(id, func)}}{Catch a thumbtrack command (continuous movement of the scroll thumb).}
-\end{twocollist}%
+\input scrolevt.inc
 
 \wxheading{See also}