How to disable Buttons based on condition.

Question

Hi
Need your help to disable button based on condition.
Please refer the application:
http://apex.oracle.com/pls/otn/f?p=34797:5:110582943383419::NO:::
login credentials:
workspace: vsanthanam
user: vijay
pswd: apex_demo
In the above application, i have 2 buttons in page 5, (Report1 and Report2)
Where i have to disable button based on the following conditon:
i) USER whoever has Admin value 'Y' in my table can access the button.
for this i've written a Button Condition : Type (EXISTS)
select 1 from apex_extra_values where rtrim(lower(empname)) like decode((select Admin from apex_extra_values
where rtrim(lower(empname))=rtrim(lower(V('APP_USER')))),'Y',rtrim(lower(V('APP_USER'))))
note: i have empname same as my APEx user name. with Admin access 'Y'.
By using this code i can able to hide the button for users who has no Admin access.
But my requirement is : i have to show the button even if the user is not Admin, but to grey out (disable the button - no action)
I tried using javascript function:
function disableButton(pThis)
pThis.disabled=true;
But either of this (exists condtion or JAvascript function) works in my case and not both.
Any pointer on this would be highlt appreciated.
Thanks
Vijay

Answer 1

Couple of things:
1. I would never use v('APP_ITEM') but :APP_ITEM - it is faster and there is no need to use this function within an application
2. The way you are doing this check is not the best approach. You should create an authorization schema and run this once per session. Whatever this authorization is returning as a result you can check using the following Function returning boolean:
IF apex_util.public_check_authorization ('MY_AUTH') THEN RETURN TRUE; ELSE RETURN FALSE; END IF;
See this example on authorization issues:
http://apex.oracle.com/pls/otn/f?p=31517:148
3. As far as disabling a button is concerned I think I explained the options. I also have an example on that here:
http://apex.oracle.com/pls/otn/f?p=31517:143
whereby it is not disabling but hiding a button.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
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