add graph binary

bin/graph

@@ -0,0 +1,11 @@
+#!/usr/bin/env ruby
+
+$:.unshift(File.join(File.dirname(__FILE__), *%w[.. lib]))
+
+require 'glowstick'
+
+graph = Glowstick::Graph.new
+
+File.read("/Users/tom/mem.log").split("\n").each { |x| graph.add(x.to_i) }
+
+Glowstick.new(nil).start

lib/glowstick/glowstick.rb

@@ -64,6 +64,8 @@ def keyboard(key, x, y)
   end
 
   def idle
+    return unless @handler.respond_to?(:idle)
+
     should_draw = @handler.idle
     if should_draw
       glutPostRedisplay