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Unit: SDL_onoffbut
Class: TOnOffBut
Declaration: property GroupIndex: integer;

TOnOffBut components belong to the same group if they have the same value on their GroupIndex property. Buttons in the same group behave in a mutually exclusive fashion: when one button in the group is selected (property OnOff = TRUE), all other buttons in the group become unselected (property OnOff = FALSE). When GroupIndex is zero, the button behaves independently of all other buttons on the form.

Note that the property AllowAllOff also controls the behavior of grouped buttons.

Example: This property is used in the following example program (see for downloading the code): onoffbut

Last Update: 2012-Okt-20