Route Scripts

Appending Ending Route Scripts to the Standard NewtApp Ones

We'd like to have Duplicate, Delete, and Beep. The solution is to find a way to augment the routeScripts array found in the newtApplication proto. We can't just copy the array and put it in our template, unfortunately; the value of the routeScripts slot in the newtApplication proto may change in future devices or system software.

The first thing we'll do is store our route scripts in a different slot so the standard ones aren't overridden.

2. Rename the routeScripts slot to extraRouteScripts to avoid conflict.

3. We need a way to dynamically copy the routeScripts array. We'll do that by overriding GetRouteScripts in our newtApplication template. Our code will return a new array containing the elements from the routeScripts array and the extraRouteScripts array:

func(targetInfo)
begin
   local orig :=
      inherited:?GetRouteScripts(targetInfo);
   if not orig then
      orig := routeScripts;
   local n := Clone(extraRouteScripts);
   // append orig to n
   ArrayMunger(n, 0, 0, orig, 0, nil);
   return n;
end

Now when we build and download, we have the original Duplicate and Delete as well as the new Beep (see FIGURE 12.6).

FIGURE 12.6 : The Action picker after overriding GetRouteScripts.

An online version of Programming for the Newton using Macintosh, 2nd ed. Š1996, 1994, Julie McKeehan and Neil Rhodes.

Last modified: 1 DEC 1996