How to set a value wo resending the page?

Question

hello,
I have a simple question.
Here is the scenario i need to implement:
Two items on the page:
1. "select list" returns list of values ( distinct )
2. "popup" item.
It should work in this manner:
a. initial value is derived ( sql stmnt to the DB ) from the value of the "select list" ( which is a dynamic lov );
b. if user decided to change this value -> click on the popup icon and the list of values will be presented based on the dynamic LOV. Selecting one of those will override the initial value of the item.
What i do NOT want to do is to submit the page to get this initial value ( from select ).
Hope it's clear.
thank you
Andrew

Answer 1

I've implemented a solution recently which I think will help you. Put the following Javascript into the HTML Header section.
* setPageItemSessionData()
* This function is called to set a page item's html + session
* data to a specific value.
* Arguments:
* pageItemName - the page item to change
* val - the value to set it to
function setPageItemSessionData(pageItemName, val)
try
/* need to take data passed into this function
and store in session variable as named in pageItemName */
/* store in HTML field only here */
document.getElementById(pageItemName).value = val;
/* store in session variable - don't really know how this works
but it does !*/
var l_Return = null;
/* get new http post request */
var get = new htmldb_Get(null,html_GetElement('pFlowId').value);
/* add http post variable/data */
get.add(pageItemName, val);
/* submit post over http - receving end will take data and store
in session variable */
gReturn = get.get();
catch(e)
alert("setPageItemSessionData: Exception - " + e);
Create a hidden text item which will be used to contain the selected Select List value (not display value). In my example this is called P162_OUTGRPIDD but it can be called anything you want.
Now put the following javascript into the Select List's HTML Form Element Attributes cell:
onchange="javascript:setPageItemSessionData('P162_OUTGRPIDD',this.value);"
The hidden text element will be changed whenever the Select List is changed. It will be set to the value (not the display value) of the Select List.
The value of the hidden item is saved in session state (as well as HTML) so that it can be used by the POPUP LOV
Now in the POPUP LOV item you can reference P162_OUTGRPIDD in the where clause, as the example below shows:
select sklpin d, sklpin v
from pdrskl, pdrgrp
where grpidd1 = grpidd and
grptyp = 'R' and
pdrskl.itpidd1 = :P162_ITPIDD and
grpidd = :P162_OUTGRPIDD and
bldagtidd1 is null
order by sklpin asc