Listbox Auto-select

Paulshistory · **Posted:** March 24th, 2010, 11:23 am

Hi

I'm using a listbox, with users selecting an option to go to another page, based on a variable-change trigger.

When they come back to the screen with the listbox on, is there any way to automatically have the listbox displaying the previous setting, rather than for it to reset to the beginning of the listbox each time?

I've not used much scripting, so if this involves any scripting, I'd appreciate it if you could give me step by step syntax if possible.

Many thanks!

Lar_123 · **Posted:** March 24th, 2010, 1:49 pm

Paul,

You can achieve this with minimal scripting.

1. Under Listbox_1 properties, choose a Page variable to associate with the LB Index.
e.g. in this example, I named it 'LB001index' (w/o quotes of course)

2. Next, create a Page variable called 'LB001index2', and make it a Number and Persistent.
That last part is important. (or, you could use a Publication variable for this instead).

3. Create a Listbox_1 action under a Mouse Left Click Trigger. Set Variable... choose LB001index2,
and then below that select Variable LB001index. (what you want is to set: LB001index2 = LB001index )

4. Next and last, set up Listbox_1 OnShow Trigger.
Under that you will add a simple Script (it is an action under 'Programming' tab).
Simply Paste the following:

Code:

wait(0)
Listbox_1.SetListBoxSelection(LB001index2)

It turns out the 'wait(0)' is important here. I could not find a standard Action to do that 'set selection' part. So Script.

Of course for all of the above steps, you 'Apply' or 'OK'...
and you now have a Listbox with PERSISTENT Selection.

Cheers.

Lar_123 · **Posted:** March 24th, 2010, 2:37 pm

I should add that this set-up can be used in another way. When the User arrives on a new Page,
the Listbox can be used as an 'indicator' of what 'topic' he is viewing... and allow him to select other topics on the same page
(perhaps going to another Frame in a MultiFrame object). It is much like a Menu or ToC.

The variable LB001index2 (above) would be set elsewhere and becomes the 'driver' for which line in the Listbox is pre-selected for the User, and highlighted.

Paulshistory · **Posted:** March 24th, 2010, 5:03 pm

Many thanks - tried it and it works - fantastic!!!!!

Digital Workshop

Listbox Auto-select

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