Initialize ITEMs on page render

Question

I have a page that contains several charts that are dependant on two items:
P1_FROM
P1_TO
The charts need these values in order to render. Both Items are date pickers. The problem I have is that when the page first renders, these values are not defined and therefor the chart query returns no results and the charts do not display. Looking at session state I can see that these items have no value assigned to them. In order to get the pages to render I must click on the GO button that I have create on the page. The two items have default values but they do not seem toget assigned until the GO button is pressed.
How can I assign default values to these items so that when the page first renders the charts are displayed, whithout having to press the GO button?

Answer 1

Mike:
I suspect that the chart on page 40 is being rendered by an APEX database connection that is not the same one that renders the rest of the stuff on page 40. So, it is possible that the database connection rendering the chart does not see the new values for the page items set in the URL as these may not have been committed to the database yet.
You could try this.
Change the chart query to be
select 'javascript:setStuff("' || to_char(datum, 'yyyy.mm.dd') ||  '","' ||to_char(datum, 'yyyy') || '")' link,
to_char(datum, 'dd.mm.yyyy') Datum,
Avg_mips
from ... some sql query...Add the JS below into the HRML page header<script>
function setStuff(p_date,p_jahr) {
  $x('P40_DATE').value=p_date
$x('P40_JAHR').value=p_jahr
doSubmit('XXXX');
</script>Define an 'After Submit...' branch to page 40. Make the branch conditional on Request = 'XXXX'
varad