Javascript calculation with APEX_ITEM.TEXT question

Question

Here is my code:
select APEX_ITEM.TEXT(10,conversion_factor,10,null,null,'conv'||rownum) "Convert", APEX_ITEM.CHECKBOX(1,null,'CHECKED') "Unlocked", APEX_ITEM.DISPLAY_AND_SAVE(2,spec_name) "Name", APEX_ITEM.CHECKBOX(3,null,'CHECKED') "N/A", APEX_ITEM.CHECKBOX(4,null,'UNCHECKED') "Unknown", CASE NVL(secondary_value, 'x')
WHEN 'x' THEN (APEX_ITEM.TEXT(5,null,35,null,'onChange=$x("PrimaryUnit'||rownum||'").value=$x(("conv'||rownum||'").value)*this.value;','PrimaryUnit'||rownum))
ELSE APEX_ITEM.TEXT(6,primary_value,35,null,'PrimaryUnit') END "Primary Unit",
CASE NVL(primary_symbol, 'x')
WHEN 'x' THEN ' '
ELSE APEX_ITEM.DISPLAY_AND_SAVE(7,primary_symbol) END "Primary Symbol",
CASE NVL(primary_symbol, 'x')
WHEN 'x' THEN ('<center>Edit</center>')
ELSE APEX_ITEM.TEXT(8,secondary_value,20,null,'onChange=$x("PrimaryUnit'||rownum||'").value=$x(("conv'||rownum||'").value)*this.value;','SecondaryUnit'||rownum) END "Secondary Unit",
CASE NVL(secondary_symbol, 'x')
WHEN 'x' THEN ' '
ELSE APEX_ITEM.DISPLAY_AND_SAVE(9,secondary_symbol) END "Secondary Symbol", conversion_factor
from prd_model_specs_maint_vw
where equip_id = :P201_EQUIP_ID
and spec_group_name = :P240_ID
The scenario is this: I have a field (PrimaryUnit + rownum). I would like to have a user put a number in this field and the javascript should take that value and take the conversion_factor and calculate what the new value is a place it in the second field (SecondaryUnit + rownum). I am currently getting a result of 0 every time. The javascript is an onChange call. This query is a bit messy, so let me know if you need more explanation. Thanks.
Jon

Answer 1

I like that solution. I will give that a shot. I did get the conversion to work, but it is messier than Andy's option. Here's is how the query looks now for anyone's reference:
select APEX_ITEM.TEXT(10,conversion_factor,10,null,null,'conv'||rownum) "Convert", APEX_ITEM.CHECKBOX(1,null,'CHECKED') "Unlocked", APEX_ITEM.DISPLAY_AND_SAVE(2,spec_name) "Name", APEX_ITEM.CHECKBOX(3,null,'CHECKED') "N/A", APEX_ITEM.CHECKBOX(4,null,'UNCHECKED') "Unknown", CASE NVL(secondary_value, 'x')
WHEN 'x' THEN (APEX_ITEM.TEXT(5,null,35,null,'onChange=$x("SecondaryUnit'||rownum||'").value='||conversion_factor||'*this.value;','PrimaryUnit'||rownum))
ELSE APEX_ITEM.TEXT(6,primary_value,35,null,'PrimaryUnit') END "Primary Unit",
CASE NVL(primary_symbol, 'x')
WHEN 'x' THEN ' '
ELSE APEX_ITEM.DISPLAY_AND_SAVE(7,primary_symbol) END "Primary Symbol",
CASE NVL(primary_symbol, 'x')
WHEN 'x' THEN ('<center>Edit</center>')
ELSE APEX_ITEM.TEXT(8,secondary_value,10,null,'onChange=$x("PrimaryUnit'||rownum||'").value=this.value/'||conversion_factor||';','SecondaryUnit'||rownum) END "Secondary Unit",
CASE NVL(secondary_symbol, 'x')
WHEN 'x' THEN ' '
ELSE APEX_ITEM.DISPLAY_AND_SAVE(9,secondary_symbol) END "Secondary Symbol", conversion_factor
from prd_model_specs_maint_vw
where equip_id = :P201_EQUIP_ID
and spec_group_name = :P240_ID
The change that made it work is this:
onChange=$x("SecondaryUnit'||rownum||'").value='||conversion_factor||'*this.value;
The '||conversion_factor||'*this.value is different and now works. Thanks,
Jon