24.8 POPUP_FROM_LOV Function

This function generates an HTML popup select list from an application shared list of values (LOV). Like other available functions in the APEX_ITEM package, POPUP_FROM_LOV function is designed to generate forms with F01 to F50 form array elements.

Syntax

APEX_ITEM.POPUP_FROM_LOV(
    p_idx              IN    NUMBER,
    p_value            IN    VARCHAR2 DEFAULT NULL,
    p_lov_name         IN    VARCHAR2,
    p_width            IN    VARCHAR2 DEFAULT NULL,
    p_max_length       IN    VARCHAR2 DEFAULT NULL,
    p_form_index       IN    VARCHAR2 DEFAULT '0',
    p_escape_html      IN    VARCHAR2 DEFAULT NULL,
    p_max_elements     IN    VARCHAR2 DEFAULT NULL,
    p_attributes       IN    VARCHAR2 DEFAULT NULL,
    p_ok_to_query      IN    VARCHAR2 DEFAULT 'YES',
    p_item_id          IN    VARCHAR2 DEFAULT NULL,
    p_item_label       IN    VARCHAR2 DEFAULT NULL)
    RETURN VARCHAR2;

Parameters

Table 24-8 POPUP_FROM_LOV Parameters

Parameter	Description
p_idx	Form element name. For example, 1 equals F01 and 2 equals F02. Typically, p_idx is a constant for a given column
p_value	Form element current value. This value should be one of the values in the p_lov_name parameter
p_lov_name	Named LOV used for this popup
p_width	Width of the text box
p_max_length	Maximum number of characters that can be entered in the text box
p_form_index	HTML form on the page in which an item is contained. Defaults to 0 and rarely used. Only use this parameter when it is necessary to embed a custom form in your page template (such as a search field that posts to a different website). If this form comes before the #FORM_OPEN# substitution string, then its index is zero and the form opened automatically by Oracle Application Express must be referenced as form 1. This functionality supports the JavaScript used in the popup LOV that passes a value back to a form element.
p_escape_html	Replacements for special characters that require an escaped equivalent: &lt; for < &gt; for > &amp; for & Range of values is YES and NO. If YES, special characters are escaped. This parameter is useful if you know your query returns illegal HTML.
p_max_elements	Limit on the number of rows that can be returned by your query. Limits the performance impact of user searches. By entering a value in this parameter, you force the user to search for a narrower set of results.
p_attributes	Additional HTML attributes to use for the form item.
p_ok_to_query	Range of values is YES and NO. If YES, a popup returns first set of rows for the LOV. If NO, a search is initiated to return rows.
p_item_id	ID attribute of the form element.
p_item_label	Invisible label created for the item.

Example

The following example demonstrates a sample query the generates a popup from an LOV named DEPT_LOV.

SELECT APEX_ITEM.POPUP_FROM_LOV (1,deptno,'DEPT_LOV') dt 
FROM emp