{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Interactive Recomputation\n",
    "\n",
    "The widgets work with the [interact API](http://ipywidgets.readthedocs.io/en/latest/examples/Using%20Interact.html), so that a cell can be recomputed as the widgets change value.  This API is slated for improvement see [#5867](https://github.com/twosigma/beakerx/issues/5867)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import static com.twosigma.beakerx.groovy.widgets.Interactive.interact\n",
    "\n",
    "class DataHolder{\n",
    "    static Plot plot = null;\n",
    "}\n",
    "\n",
    "public static Object f(a,b){\n",
    "    if (DataHolder.plot == null){\n",
    "        DataHolder.plot = new Plot(title: \"Lissajous Curves\")\n",
    "    }\n",
    "\n",
    "    List t = (1..1000)\n",
    "    List x = t.collect { it -> sin(it*a/100)}\n",
    "    List y = t.collect { it -> cos(it*b/100)}\n",
    "    \n",
    "    DataHolder.plot.getGraphics().clear()\n",
    "    DataHolder.plot.add(new Line(x: x, y: y))\n",
    "    return DataHolder.plot \n",
    "}\n",
    "\n",
    "interact(this.&f, 3d, -3d);"
   ]
  }
 ],
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