Arrows Keys and List Fields
devin_asay at byu.edu
Fri Jan 11 13:55:19 EST 2008
On Jan 11, 2008, at 11:12 AM, Richard Gaskin wrote:
> Gregory Lypny wrote:
>> I have a list field, and as I use the Up and Down keys, I want to
>> display the contents of individual lines in another field. The
>> list field's handler below displays the lagged line and not the
>> one that was keyed to because the selected line doesn't change
>> until the pass arrowKey command is invoked and that has to happen
>> at the end for the line to change.
>> Not sure how to get what I want.
>> on arrowKey theKey
>> if theKey is "Up" or theKey is "Down"
>> put the value of the selectedLine of the target into fld
>> pass arrowKey
>> end if
>> end arrowKey
> If you trap the selectionChanged message instead of arrowKey,
> you'll not only get the message when you want it but also have an
> update when the mouse is used to, from the same handler. You can
> also get the value of the selected line by using the hilitedText
> on selectionChanged
> put the hilitedText of the target into fld "Display"
> end selectionChanged
> Also, the "left" and "right" arrow keys have the same automatic
> behavior as "up" and "down" respectively, so this selectionChanged
> handler will handle those as well.
Rube Goldberg is spinning in his grave! Why would you want a short,
elegant solution when you could have a complicated one that took you
an hour to perfect!
Humanities Technology and Research Support Center
Brigham Young University
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