Function widgetNext

core/widget.go:456–468

widgetNext returns the next widget in the tree, including Parts, which are considered to come after Children. returns nil if no more.

(w Widget)

// including Parts, which are considered to come after Children.
// returns nil if no more.
func widgetNext(w Widget) Widget {
	wb := w.AsWidget()
	if !wb.HasChildren() && wb.Parts == nil {
		return widgetNextSibling(w)
	}
	if wb.HasChildren() {
		return wb.Child(0).(Widget)
	}
	if wb.Parts != nil {
		return widgetNext(wb.Parts.This.(Widget))
	}
	return nil
}

// widgetNextSibling returns next sibling or nil if none,
// including Parts, which are considered to come after Children.