How are listbox and radiobutton items working in oracle forms?!?

Question

Hi all.
I need some help over may be a standard case in every real project.
Imagine i have a db table PERSONS -> PERSONID, NAME, TOWNID, MATRIALSTATUSID
and table TOWNS -> TOWNID, TOWNNAME
and table MATRIALSTATUS -> MATRIALSTATUSID, NAME
And i have a standard oracle form with text item person name, listbox item with many towns (from TOWNS table) and the town of the concrete person is selected when the form is inited, after that we can change it by selecting other town and saving it to db.
The same is with matrial status but lets make it as radio group with 3 buttons married, not merried, divorced.
So my questions is how to populate the listbox(radiogroup) for 1 person by selecting data from other preferenced tables. And most important how this data is populated in the list box for example i.e. every town name is indexed in some way or what. I am a java developer and for example in java the control listbox item has two attributes the name(string) that is displayed in the listbox and a index binded for that name, and i work with indexes and show strings. I read about LOV but couldn't understand how to "index" the populated values. Is it possible.
And please can you give me some example of how to load (populate + set current town), change and (if it is possible) "index". The same case appears to be valid with radio buttons and check boxes.
You could give me some tutorials too, i cant find simple and focused on the problem examples.
Thank you.
Best Regards.

Answer 1

Hi,
well here is what i done for now.
First I created recordGroup with query SELECT GENDER, GENDERID FROM GENDERS (I want to select all genders and place them in listbox)
After that i created Listbox and on triger when-new-form i placed this code:
DECLARE
it ITEM:=FIND_ITEM('PERSONS_DETAILS.GENDER');
BEGIN
CLEAR_LIST(it);
POPULATE_LIST(it, 'RG_LIST');
DEFAULT_VALUE(NULL, 'GLOBAL.PERSONID');
IF :GLOBAL.PERSONID IS NOT NULL THEN
SET_BLOCK_PROPERTY('PERSONS_DETAILS', ONETIME_WHERE, 'PERSONID=' || :GLOBAL.PERSONID);
GO_BLOCK('PERSONS_DETAILS');
EXECUTE_QUERY;
:GLOBAL.PERSONID:=NULL;
END IF;
END;
Imagine i have a main form PERSONS that displays general information about many persons (the data is retrieved from PERSONS db table). The form PERSONS displays PERSONID, PERSON FIRSTNAME and PERSON LASTNAME. When a user double click on some row from the PERSONS FORM( i have tabular datablock that displays the person data) other form 'PERSONS_DETAILS' must be displayed with detailed information about the selected person. The data about the selected person is loaded well but i want gender to be listbox and the user can change it if he wants. So i have TABLE GENDERS 1:N with PERSONS and the table has GENDERID AND GENDER. When the user double clicks on single person i must populate the list with all possible genders from the GENDERS table and set the gender of the selected person. How to do that?
P.S.: The example with gender is not very good because it could be only male female, but don't worry about it. You may think about gender list as townlist :)
It finds me the GENDER LIST and populates it. After that i take the personId (that is global variable and comes from previous form) and displays all the data for the person with id personid.
When i compile the form it gives me :
FRM-30351: No list elements defined for list item.
List GENDER
Edited by: user9536806 on Nov 19, 2008 3:01 AM