lighttroupe/luz-next

#
# Flashes when there is incoming messages, stays lit when messages come really fast
#
class GuiMessageBusMonitor < GuiButton
    FULL_ON_RANGE = 0.0..0.2
    TRANSITION_RANGE = 0.2..0.4
    TRANSITION_TIME = TRANSITION_RANGE.last - TRANSITION_RANGE.first

    def calculate_alpha
        case $env[:time_since_message_bus_activity]
        when FULL_ON_RANGE
            1.0
        when TRANSITION_RANGE
            (1.0 - (($env[:time_since_message_bus_activity] - TRANSITION_RANGE.first) / TRANSITION_TIME)).clamp(0.0, 1.0)
        else
            0.0
        end
    end

    def gui_render
        with_alpha(calculate_alpha) {
            with_gui_object_properties {
                @image.using {
                    gui_render_background
                }
            }
        }
    end
end