Method focusOnName

core/frame.go:298–343

focusOnName processes key events to look for an element starting with given name

(e events.Event)

// focusOnName processes key events to look for an element starting with given name
func (fr *Frame) focusOnName(e events.Event) bool {
	kf := keymap.Of(e.KeyChord())
	if DebugSettings.KeyEventTrace {
		slog.Info("Layout FocusOnName", "widget", fr, "keyFunction", kf)
	}
	delay := e.Time().Sub(fr.focusNameTime)
	fr.focusNameTime = e.Time()
	if kf == keymap.FocusNext { // tab means go to next match -- don't worry about time
		if fr.focusName == "" || delay > SystemSettings.LayoutFocusNameTabTime {
			fr.focusName = ""
			fr.focusNameLast = nil
			return false
		}
	} else {
		if delay > SystemSettings.LayoutFocusNameTimeout {
			fr.focusName = ""
		}
		if !unicode.IsPrint(e.KeyRune()) || e.Modifiers() != 0 {
			return false
		}
		sr := string(e.KeyRune())
		if fr.focusName == sr {
			// re-search same letter
		} else {
			fr.focusName += sr
			fr.focusNameLast = nil // only use last if tabbing
		}
	}
	// e.SetHandled()
	// fmt.Printf("searching for: %v  last: %v\n", ly.FocusName, ly.FocusNameLast)
	focel := childByLabelCanFocus(fr, fr.focusName, fr.focusNameLast)
	if focel != nil {
		em := fr.Events()
		if em != nil {
			em.setFocusEvent(focel.(Widget)) // this will also scroll by default!
		}
		fr.focusNameLast = focel
		return true
	} else {
		if fr.focusNameLast == nil {
			fr.focusName = "" // nothing being found
		}
		fr.focusNameLast = nil // start over
	}
	return false
}

// childByLabelCanFocus uses breadth-first search to find
// the first focusable element within the layout whose Label (using