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MathGroup Archive 2007

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Notebook programming: SlideShow: emulating bullet at-a-time visibility

  • To: mathgroup at smc.vnet.net
  • Subject: [mg83925] Notebook programming: SlideShow: emulating bullet at-a-time visibility
  • From: "W. Craig Carter" <ccarter at mit.edu>
  • Date: Tue, 4 Dec 2007 04:32:50 -0500 (EST)

To those of you who have some experience with Notebook 
programming:

I've been trying to write commands for keystrokes that 
emulates the standard "add-a-bullet-to-current-display" that
are common in other presentation applications.  (I am giving 
a talk about using mathematica to teach math to engineers.)

I have a IR remote device that I can use to send 
programmable key-strokes to mathematica (like "->" to go to 
next page).


To add a bullet to the display,
I've been trying two strategies without success.

1.  Recursive grouping of text cells, editing 
../../KeyEventTranslations.tr with something such as:

KeyEvent["key",Modifiers->{..,..}],
FrontEndExecute[{ 
FrontEnd`SelectionMove[FrontEnd`InputNotebook[],Next,CellGroup],
FrontEnd`FrontEndToken[FrontEnd`InputNotebook[],"OpenClosedGroup"],
---and then SelectionMove to After and then Previous---
}
(* I can't get this to work, because I can't find a way to 
move the selection to the next closed group *)

2. Set the Option->0 for all bullets to be revealed, 
then (pseudocode) Select Next Text cell, 
SetOption[??CurrentSelection??, Opacity->Automatic}
Here I fail, because I can only get the global options set, 
and not that for the particular cell.

Can anyone think of a method to make these strategies work; 
or, suggest one that has a better chance of succeeding?

As always with talks, this is a last-minute job. I have a 
fall-back strategy which is to make separate pages with 
increasing numbers of bullets. But, I'd rather not use this 
because (well, I've sunk too much time into this method and 
I know its lost time and should stop now, but, well you 
know..), and I like to be able to "back-up" during 
presentations and not "remove bullets one at a time"

Thanks, Craig



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