Re: Passing values between elements

Hi, Siegfried,

I did something similar in an application a while back. Translating  
the problem domain for that application to your two button names: I  
created my page with the Location pop-up's list attribute bound to  
the initialized array of locations. I bound the Building pop-up's  
list attribute to an empty array. I also added the onChange attribute  
to the Location button:

     onChange = "javascript:this.form.target='_parent';  
this.form.submit()"

The action method for the form submission used the Location's  
selection attribute value in an EOQualifier which I used to fetch the  
values for the Building's array for that location. The action method,  
of course, returned context().page() to display the same page again,  
but with the Building's pop up filled in.

By adding the "onChange" attribute to the Location's pop-up, you save  
the user having to click a button after selecting the location. The  
page still has to refresh, but it feels a bit more convenient having  
the page refresh automatically upon selecting a Location.

For a smoother approach without page refresh, you would have to move  
to Ajax or download the complete Buildings array initially to some  
JavaScript variable and play some games with JavaScript to filter the  
ones you want based on the Location selection.

Regards,
Jerry

On Mar 29, 2006, at 6:46 AM, Siegfried Makedanz wrote:

> Hello,
>
> I have two dynamic elements (WOPopUpButton) named Locations and  
> Buildings. Now I would like to set the list binding in the  
> Buildings array based on the selection in Locations. Probably an  
> easy one, but as a sporadic WO user I have no clue yet.
>
> Thanks,
> Siegfried
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__ Jerry W. Walker,
    WebObjects Developer/Instructor for High Performance Industrial  
Strength Internet Enabled Systems

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