lighttroupe/luz

class GuiInteger < GuiNumeric
    def initialize(object, method, min, max)
        super(object, method, min, max)
        @change_speed_multiplier = 4.0
        @format_string = "%+d"
        @zero_value = 0
        draggable!
    end

    def get_value
        super.to_i
    end

    def purify_value(value)
        value.to_i
    end

    def update_drag(pointer)
        distance = pointer.drag_delta_x + pointer.drag_delta_y        # NOTE: cummulative, so up+right is fastest
        change = change_for_distance(distance)
        change *= -1 if distance < 0.0
        set_value(get_value + change) unless change == 0
    end

    # NOTE: always returns positive amount
    def change_for_distance(distance)        # distance is in screen space-- the mouse's playground!
        @gui_previous_count ||= 0

        distance_abs = distance.abs
        count, remainder = $env[:beat].divmod(0.5)
        delta = (count - @gui_previous_count)

        @gui_previous_count = count        # save for next time

        if distance_abs > 0.2
            delta > 0 ? 4 : 0
        elsif distance_abs > 0.1
            delta > 0 ? 2 : 0
        elsif distance_abs > 0.01
            ($env[:is_beat]) ? 1 : 0
        else
            0
        end
    end

    def calculate_step_value(direction)        # :up or :down
        get_value + ((direction == :up) ? 1 : -1)
    end
end