lighttroupe/luz-next

#
# GuiRadioButtons are multiple buttons, with one 'on' at a time
#
class GuiRadioButton < GuiObject
    ON_COLOR = [1,1,1,1]
    OFF_COLOR = [1,1,1,0.5]

    easy_accessor :parent
    easy_accessor :value

    def gui_render
        with_color(on? ? ON_COLOR : OFF_COLOR) {
            background_image.using {
                unit_square
            }
        }
    end

    def click(pointer)
        parent.set_value(value)
    end

    def on?
        parent.get_value == value
    end
end

class GuiRadioButtons < GuiList
    def initialize(object, method, options)
        super()
        @object, @method, @options = object, method.to_s, options
        @options.each { |value, image|
            self << GuiRadioButton.new.set_value(value).set_parent(self).set_background_image(image)
        }
    end

    def get_value
        @object.send(@method)
    end

    def set_value(value)
        @object.send("#{@method}=", value)
        selection_change_notify
    end

    def selected_index
        @options.index(get_value)
    end

    def set_index(index)
        set_value(@options[(index) % @options.size])
    end

    def click(pointer)
        set_index(selected_index + 1) if selected_index
    end
end