Skip to main content

Integration of Forms and APEX : Calling APEX from Forms

By
In previous blog posts (like this, this and this one) I explained how you can integrate (or embed) Oracle Forms within an APEX Page. But yesterday I stumbled upon this question on the Oracle APEX Forum. There someone was looking for a solution how to access an APEX Page from an Oracle Form - so exactly the other way round. And, after some trial-and-error I came up with this solution:

1. Copy the basejpi.htm (or whatever html file you're using in the formsweb.cfg) on your application server to (something like) forms2apex-jpi.htm and reference that in your formsweb.cfg.

2. Edit the forms2apex-jpi.htm and add an IFRAME tag just before the closing BODY tag:
<IFRAME src="http://localhost:7778/pls/apex/f?p=104"
       style="width:800px;height:450px;visibility:hidden"  
       name="APEX" 
       id="APEX" 
       scrolling="auto" 
       marginwidth="1" 
       marginheight="1"
       frameborder="1" 
       vspace="1" 
       hspace="1" />
where the src references your APEX app.

3. In the same file, add a javascript function between the HEAD-tags, to call the APEX page (in this example it is an IR and I add a parameter to the call):
<script type="text/javascript">
  function ShowApexPage( pPage, pID ){
    vFrame = document.getElementById("APEX");
    vFrame.src = "http://localhost:7778/pls/apex/f?p=104:"+pPage+"::::RP,"+pPage+",RIR:IR_CUSTOMER_ID:"+pID;
     vFrame.style.visibility = "visible"; 
    }
</script>
and save the file.

4. In your Form add some code to a button or - in this example - to the WHEN-NEW-RECORD-INSTANCE trigger: 
ShowApexPage( 12, :CUSTOMERS.CUSTOMER_ID );
and define that ShowApexProcedure as a Program Unit (in your Form or Library): 
 PROCEDURE ShowApexPage
          ( p_page_no number
          , p_id      number 
          ) IS
BEGIN
 web.show_document('javascript:ShowApexPage( '||p_page_no||','||p_id||');', '_self');  
END;
And now you're ready to roll....

Of course there are some limitations: It works best when you're using SSO or a Public APEX Page, otherwise APEX will present a login screen first...
Labels:

Comments

Post a Comment

Popular posts from this blog

Fix Interactive Report headers issue when using a Region Display Selector

By
When you have multiple Interactive Reports (IR) on your page and use a Region Display Selector to mimic tabs, you might notice some weird behaviour in the IR headings if you switch tabs. The headings are not positioned correctly and you get an extra empty row under the headings. It just looks weird and ugly. But if you resize your browser window, it all looks fine again (until you switch to another tab..) So can we fix this by creating a Dynamic Action that mimics that "browser window resize" event? Yes we can! Create a Dynamic Action that fires on Click of the jQuery selector li.apex-rds-item a . That should fire a JavaScript snippet :  apex.event.trigger(this.triggeringElement, "apexwindowresized"); So now a click on a tab not only switches from one IR to another but also fires that event that will "autofix" the IR headers. A simple solution for an annoying problem. This applies to APEX 5.0, I assume it will be solved in 5.1.
Post a Comment
Read more

How to create neatly formatted Excel documents using PL/SQL?

By
If there is a requirement to produce output from an application into Excel, you would probably create a CSV (Comma Separated File) with the data and start Excel to show the data - at least that's what I did...until now. The drawback of this solution is that you could only produce data and no nice layout. But Excel is also capable of opening HTML-files and using this you could create Excel files with data and magnificent layout! Let me give an example: 1. Create a procedure to show the data in formatted in an HTML table. CREATE OR REPLACE PROCEDURE display_emp_list IS v_emp_count NUMBER(5); v_empno NUMBER(8); v_ename VARCHAR2(50); v_job emp.job%TYPE; v_sal emp.sal%TYPE; v_bg_color VARCHAR2(10) := ''; CURSOR c_emp IS SELECT empno, initcap(ename), job, sal FROM emp ORDER BY ename; BEGIN SELECT COUNT(*) INTO v_emp_count FROM emp; owa_util.mime_header('application/ms-excel', FALSE); htp.p('Content...
21 comments
Read more

APEX ReadOnly Pages - The easy way

By
If your Oracle APEX Application requires different types of access - full access or readonly - for different types of users, you can specify a Read Only Condition on Page level (or Region, Item, Button, etc.).  You can set an Authorization Scheme on Application level, so it'll be applied to all pages. So if you have an Authorization Scheme named 'User Can Access Page' defined by a PL/SQL function like this: return apex_authorization.user_can_access_page ( p_app_id  => :APP_ID , p_page_id => :APP_PAGE_ID , p_user    => :APP_USER );  then you can code all the logic in the database using the APEX Repository, your own tables or a combination to define whether a user has access to that page or not. But alas it is not possible to define something similar Application wide for a Read Only condition. You can specify an Authorization Scheme 'User has Read Only Access' using a similar signature as the one above and use that on each and e...
Post a Comment
Read more