(no subject)

Klaus on-rev klaus at major.on-rev.com
Sun Apr 18 06:40:17 CDT 2010


Bom dias Haroldo,

> ...
> 
> Instead of going to card 1 it kept going to the next card each time I pressed the up arrow key, and after the last card the stack just closed. 

you have a little error in your logic, that's why!

> Here's my original handler, from the Hypercard stack script, which doens't work:
> (handler is in stack script)
> on arrowKey whichKey
>  if whichKey is "right" then
>    if the optionKey is down then
>      go first card of next bg
>    else

## ELSE here means EVERYTHING but "right"!
## Therefore every arrowkey but "right" goes to the next card!

>      go next card of this bg
>    end if
>  end if
>  if whichKey is "left" then
>    if the optionKey is down then
>      go last card of previous bg
>    else
>      go previous card of this bg
>    end if
>  end if
> end arrowKey

Use this instead:


on arrowkey tKey
  switch tKey
  case "right"
      if the optionKey is down then
        go first card of next bg
    else
       go next card of this bg
    end if
  break
  case "left"
     if the optionKey is down then
      go last card of previous bg
    else
       go previous card of this bg
     end if
   break

   # Now let all other arrowkeys pass
   default
     pass arrowkey
    break
 end switch
end arrowkey

I tend to use "switch" since this makes scripts better readable than lots of 
nested "if... then" statements.

> Any help would be appreciated. Thank you.
> Harold

Best

Klaus

--
Klaus Major
http://www.major-k.de
klaus at major.on-rev.com




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