Label wrapping

dr.rb

# Sample from:
# https://docs.dragonruby.org/#/samples/rendering-basics?id=labels-text-wrapping-mainrb
def tick(args)
  lines = ["line1", "line2", "line3", "line4"]
  labels = lines.map.with_index do |text, index|
    {
      x: 1280 / 2,
      y: 720 / 2,
      text: text,
      anchor_y: index
    }
  end

  last_label = labels[-1]
  last_label_w, last_label_h = GTK.calcstringbox(last_label.text)
  padding_left = 8
  padding_right = 8
  padding_top = 8
  padding_bottom = 8
  highlight_box = {
    x: last_label.x,
    y: last_label.y,
    w: last_label_w,
    h: last_label_h,
    r: 255,
    g: 0,
    b: 0,
    a: 255,
  }
  highlight_box = highlight_box.anchor_rect(last_label.anchor_x || 0, last_label.anchor_y || 0)
  highlight_box.tap do |box|
      box.x = box.x - padding_left
      box.y = box.y - padding_bottom
      box.w = box.w + padding_left + padding_right
      box.h = box.h + padding_bottom + padding_top
  end

  args.outputs.solids << highlight_box
  args.outputs.labels.concat(labels)
end