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extendoptionmenu.getpreviousindex - Function

	Package	display
	Module	widgets
	Tool	extendoptionmenu

Get the index previous to the current selection

Synopsis
getpreviousindex()

Returns
Integer or F

Description

This tool function recovers the index that you selected previous to the current selection. If the menu is empty, it returns F. If no menu item has been selected by the user, it returns unity.

Example

- labels := "m mm cm";
- f := frame();
- m := extendoptionmenu(f, labels);
- m.selectindex(2);
- m.selectindex(3);
- m.getpreviousindex();
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