Radio

ui.Radio creates a radio button that selects its value into a *T, with a label: a click selects it, as does Space while it has the keyboard focus, and Changed reports it. The value can be of any comparable type.

ui.RadioGroup holds radio buttons as one stop of Tab: Tab goes to the one chosen, and the arrows choose among them, as do Home and End.

ui.RadioGroup(c, func() {
	for _, size := range []string{"Small", "Medium", "Large"} {
		ui.Radio(c, &app.size, size, size)
	}
}).Label("Size")

A radio group is a column; make it a row with Row:

ui.RadioGroup(c, func() {
	ui.Radio(c, &app.align, ui.Start, "Left")
	ui.Radio(c, &app.align, ui.Center, "Center")
	ui.Radio(c, &app.align, ui.End, "Right")
}).Row().Gap(16).Label("Alignment")

For a choice among many, use a select or a combobox; between views, a segmented control.

Without a look

ui.RadioBase is a radio button without a look: a row that selects its value when clicked: see custom widgets.

Accessibility

Assistive technology sees a radio group named by its Label, of radio buttons named by their labels, on for the one chosen.