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/slider.tex

@@ -36,24 +36,7 @@ Slider events are handled in the same way as a scrollbar.
 
 See also \helpref{window styles overview}{windowstyles}.
 
-\wxheading{Event handling}
-
-To process input from a slider, 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\_TOP(id, func)}}{Catch a command to put the scroll thumb at the maximum position.}
-\twocolitem{{\bf EVT\_COMMAND\_BOTTOM(id, func)}}{Catch a command to put the scroll thumb at the maximum position.}
-\twocolitem{{\bf EVT\_COMMAND\_LINEUP(id, func)}}{Catch a line up command.}
-\twocolitem{{\bf EVT\_COMMAND\_LINEDOWN(id, func)}}{Catch a line down command.}
-\twocolitem{{\bf EVT\_COMMAND\_PAGEUP(id, func)}}{Catch a page up command.}
-\twocolitem{{\bf EVT\_COMMAND\_PAGEDOWN(id, func)}}{Catch a page down command.}
-\twocolitem{{\bf EVT\_COMMAND\_THUMBTRACK(id, func)}}{Catch a thumbtrack command (continuous movement of the scroll thumb).}
-\twocolitem{{\bf EVT\_SLIDER(id, func)}}{Process a wxEVT\_COMMAND\_SLIDER\_UPDATED event,
-when the slider is moved. Though provided for backward compatibility, this is obsolete.}
-\end{twocollist}%
+\input scrolevt.inc
 
 \wxheading{See also}