(no subject)

Richmond Mathewson richmondmathewson at gmail.com
Sun Apr 18 06:46:53 CDT 2010


  On 18/04/2010 14:40, Klaus on-rev wrote:
> 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
>
seems unnecessarily long . . .  :)



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