lighttroupe/luz

#
# GuiString is for viewing and editing a single Ruby string property of an object.
#
class GuiString < GuiValue
    FOCUS_COLOR = [1,1,0.3]
    FOCUS_BACKGROUND_COLOR = [0.15,0.15,0.05]

    HOVER_BACKGROUND_COLOR = [0.1,0.1,0.1]
    COLOR = [1,1,1]

    pipe [:width, :width=, :text_align, :text_align=], :label

    easy_accessor :color, :focus_color

    def initialize(object, method)
        super
        @last_rendered_string = ''
        @label = GuiLabel.new.set(:string => get_value)
    end

    def get_value
        super.to_s
    end

    def set_value(value)
        super
        @label.string = value
    end

    def gui_render
        with_positioning {
            if keyboard_focus?
                modulate = fuzzy_sine($env[:beat]).scale(0.5, 1.0)
                with_color([FOCUS_BACKGROUND_COLOR[0] * modulate, FOCUS_BACKGROUND_COLOR[1] * modulate, FOCUS_BACKGROUND_COLOR[2] * modulate]) { unit_square }
                with_alpha(fuzzy_sine($env[:beat]).scale(0.8, 1.0)) {
                    @label.gui_render
                }
                with_color([0.2,0.2,0.0]) { unit_square_outline }

            elsif pointer_hovering?
                with_color(HOVER_BACKGROUND_COLOR) { unit_square }
                @label.gui_render
            else
                @label.gui_render
            end
        }
    end

    def renderable?(key)
        CairoFont.renderable?(key)
    end

    #
    # Mouse interaction
    #
    def click(pointer)
        grab_keyboard_focus!
    end

    def on_key_press(key)
        return super if key.control?
        case key
        when 'return', 'escape', 'tab'
            cancel_keyboard_focus!
        when 'backspace'
            if key.alt?
                set_value('')                                                                # alt-backspace erases string
            elsif key.control?
                if (last_space=get_value.rindex(' '))
                    set_value(get_value[0, last_space])                # control-backspace removes a word
                else
                    set_value('')        # (only one word left)
                end
            else
                set_value(get_value[0, get_value.length-1]) if get_value.length > 0                # basic backspace
            end
        when 'space'
            append_text(' ')
        else
            # (player typing)
            append_text(key.shifted) if renderable?(key)        # shifted means with shift key logic applied (eg. / => ?)
        end
    end

    def append_text(text)
        set_value(get_value + text)
    end
end