Progress
Programming
Handbook


Radio Sets

A radio set is a series of buttons (radio items) that represent a single field or variable. The term radio set derives from the preset tuning buttons on many car radios. When one button is pressed, any previously selected button pops out. Each of the buttons represents a different value for the field or variable. At any one time, exactly one of the buttons is chosen. If the user chooses a different button, the previously chosen button is automatically deselected.

In a graphical interface, a radio set takes on the native look of the windowing system. In the character interface, each radio item is represented by a set of parentheses. The parentheses either contain a space character (FALSE) or the letter X (TRUE).

A radio set can represent a LOGICAL, CHARACTER, INTEGER, DECIMAL, or DATE value. Radio sets are appropriate for fields that can have only one of a limited number of values.


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