lighttroupe/luz-next

#
# GuiVBox splits vertical space evenly amongst @contents
#
class GuiVBox < GuiBox
    def on_key_press(key)
        return super if key.control?
        case key
        when 'up'
            select_previous!
            selection_grab_focus!
        when 'down'
            select_next!
            selection_grab_focus!
        when 'return'
            selection_grab_focus!
        else
            super
        end
    end

    def each_with_positioning
        step = (1.0 / @contents.count)
        with_positioning {
            @contents.each_with_index { |object, index|
                with_translation(0.0, 0.5 - (step/2.0) - (step*index)) {
                    with_scale(1.0, step) {
                        yield object
                    }
                }
            }
        }
    end
end