lighttroupe/luz

#
# GuiThemeRenderer renders a Theme (as grid of styles)
#
class GuiThemeRenderer < GuiUserObjectRenderer
    def gui_render
        gui_render_styles
        gui_render_label if pointer_hovering?
    end

    def clear_render_styles_cache!
        GL.DestroyList(@object.gui_render_styles_list) if @object.gui_render_styles_list
        @object.gui_render_styles_list = nil
    end

private

    def gui_render_styles
        @object.gui_render_styles_list = GL.RenderCached(@object.gui_render_styles_list) {
            if @object.effects.size > 8
                num_rows = 4
            else
                num_rows = 2
            end
            num_columns = num_rows * 2

            width = 1.0 / num_columns
            height = 1.0 / num_rows

            with_scale(width, height) {
                with_translation(-num_columns/2.0 + 0.5, -num_rows/2.0 - 0.5) {
                    index = 0
                    for y in (0...num_rows)
                        for x in (0...num_columns)
                            with_translation(x, (num_rows - y)) {
                                break if index >= @object.effects.size
                                with_scale(0.85) {
                                    with_color(@object.effects[index].color) { unit_square }
                                }
                            }
                            index += 1
                        end
                    end
                }
            }
        }
    end
end