CHECKBOX_CHECKED built-in in Oracle D2k Forms

CHECKBOX_CHECKED built-in in Oracle D2k Forms

Description
A call to the CHECKBOX_CHECKED function returns a BOOLEAN value indicating the state of the
given check box. If the item is not a check box, Form Builder returns the following error:
FRM-41038: Item <item_name> is not a check box.
Syntax
FUNCTION CHECKBOX_CHECKED
(item_id ITEM);
FUNCTION CHECKBOX_CHECKED
(item_name VARCHAR2);
Built-in Type unrestricted function
Returns BOOLEAN
Enter Query Mode yes
A call to GET_ITEM_PROPERTY(item_name, ITEM_TYPE) can be used to verify the item type
before calling CHECKBOX_CHECKED.
To set the value of a check box programmatically, assign a valid value to the check box using standard
bind variable syntax.
Parameters
item_id Specifies the unique ID that Form Builder assigns to the item when it
creates it. The data type of the ID is ITEM.
item_name Specifies the string you defined as the name of the item at design time. The
data type of the name is VARCHAR2.
CHECKBOX_CHECKED restrictions
The CHECKBOX_CHECKED built-in returns a BOOLEAN value regarding the state of the given check
box. It does not return the actual value of the check box nor does it return the value you might have
indicated for the Mapping of Other Values property.
CHECKBOX_CHECKED examples
/*
** Built-in: CHECKBOX_CHECKED
** Example: Sets the query case-sensitivity of the item
** whose name is passed as an argument, depending
** on an indicator checkbox item.
*/
PROCEDURE Set_Case_Sensitivity( it_name VARCHAR2) IS
indicator_name VARCHAR2(80) := ’control.case_indicator’;
it_id Item;
BEGIN
it_id := Find_Item(it_name);
IF Checkbox_Checked(indicator_name) THEN
/*
** Set the item whose name was passed in to query case-
** sensitively (i.e., Case Insensitive is False)
*/
Set_Item_Property(it_id, CASE_INSENSITIVE_QUERY,
PROPERTY_FALSE );
ELSE
/*
** Set the item whose name was passed in to query case-
** insensitively (ie Case Insensitive True)
*/
Set_Item_Property(it_id,CASE_INSENSITIVE_QUERY,PROPERTY_TRUE);
END IF;
END;

转载于:https://www.cnblogs.com/quanweiru/p/6219995.html