use02.rb.html

<!DOCTYPE public PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
  <meta name="generator" content="ex2html.rb" />
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <link rel="stylesheet" type="text/css" href="css/popup.css" />
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/github.min.css" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
  <script>
    hljs.configure({ cssSelector: "pre" });
    hljs.highlightAll();
  </script>
  <title>RMagick example: use02.rb</title>
</head>
<body>
<h1>use02.rb</h1>
<div class="bodybox">
<div class="bodyfloat">
<pre class="language-ruby">
# frozen_string_literal: true

require 'rvg/rvg'

Magick::RVG.dpi = 90

rvg = Magick::RVG.new(10.cm, 3.5.cm).viewbox(0, 0, 100, 35) do |canvas|
  canvas.background_fill = 'white'
  canvas.desc = "Example - Chain 'styles' to 'use'"
  r = Magick::RVG::Group.new do |grp|
    grp.rect(60, 10).styles(fill: 'yellow')
  end
  canvas.rect(99.6, 34.6, 0.1, 0.1).styles(fill: 'none', stroke: 'blue', stroke_width: 0.2)

  # Since the rectangle specified the fill color the :fill style is ignored here.
  # However, since the rectangle did not specify a stroke color, the :stroke style
  # specified here is respected.
  canvas.use(r, 20, 5).styles(fill: 'green', stroke: 'red')
  canvas.use(r, 20, 20).styles(fill: 'green', stroke: 'blue')
end

rvg.draw.write('use02.gif')
</pre>
</div>
</div>
<div id="close"><a href="javascript:window.close();">Close window</a></div>
</body>
</html>