lighttroupe/luz-next

class GuiHistoryButton < GuiButton
    def initialize(history)
        @history = history
    end
end

class GuiBackButton < GuiHistoryButton
    def click(pointer)
        @history.back!
    end

    def gui_render
        with_alpha(@history.can_go_back? ? 1.0 : 0.2) {
            super
        }
    end
end

class GuiForwardButton < GuiHistoryButton
    def click(pointer)
        @history.forward!
    end

    def gui_render
        with_alpha(@history.can_go_forward? ? 1.0 : 0.2) {
            super
        }
    end
end