ipythonblocks_animation.ipynb

{
 "metadata": {
  "name": "ipythonblocks_animation"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Animation with <code>ipythonblocks</code>"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "For more on `ipythonblocks` see the home page at [https://github.com/jiffyclub/ipythonblocks](https://github.com/jiffyclub/ipythonblocks)."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "from ipythonblocks import BlockGrid"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import time\n",
      "from IPython.display import clear_output"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 2
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "It's possible to do animation of sorts using IPython's `clear_output` function."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "grid = BlockGrid(3, 3)\n",
      "\n",
      "previous_block = None\n",
      "\n",
      "for block in grid:\n",
      "    clear_output()\n",
      "    block.green = 255\n",
      "    \n",
      "    if previous_block:\n",
      "        previous_block.green = 0\n",
      "    \n",
      "    grid.show()\n",
      "    \n",
      "    previous_block = block\n",
      "    \n",
      "    time.sleep(0.2)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "html": [
        "<style type=\"text/css\">table.blockgrid {border: none;} .blockgrid tr {border: none;} .blockgrid td {padding: 0px;} #blocks13864996-01d8-442c-84f9-994e3619e0a7 td {border: 1px solid white;}</style><table id=\"blocks13864996-01d8-442c-84f9-994e3619e0a7\" class=\"blockgrid\"><tbody><tr><td title=\"Index: [0, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [0, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [0, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr><tr><td title=\"Index: [1, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [1, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [1, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr><tr><td title=\"Index: [2, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [2, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [2, 2]&#10;Color: (0, 255, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 255, 0);\"></td></tr></tbody></table>"
       ],
       "output_type": "display_data",
       "text": [
        "<IPython.core.display.HTML at 0x10a1e3150>"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "And this is so much fun that it's been added to `ipythonblocks`: one way is to use the `BlockGrid.animate()` method. The `.animate()` method takes\n",
      "an optional `stop_time` keyword to control the amount of time between loop steps."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "grid = BlockGrid(3, 3)\n",
      "\n",
      "previous_block = None\n",
      "\n",
      "for block in grid.animate():\n",
      "    block.green = 255\n",
      "    \n",
      "    if previous_block:\n",
      "        previous_block.green = 0\n",
      "    \n",
      "    previous_block = block"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "html": [
        "<style type=\"text/css\">table.blockgrid {border: none;} .blockgrid tr {border: none;} .blockgrid td {padding: 0px;} #blocks5885d32e-2ef8-4496-854b-6e75d384acbf td {border: 1px solid white;}</style><table id=\"blocks5885d32e-2ef8-4496-854b-6e75d384acbf\" class=\"blockgrid\"><tbody><tr><td title=\"Index: [0, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [0, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [0, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr><tr><td title=\"Index: [1, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [1, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [1, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr><tr><td title=\"Index: [2, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [2, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [2, 2]&#10;Color: (0, 255, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 255, 0);\"></td></tr></tbody></table>"
       ],
       "output_type": "display_data",
       "text": [
        "<IPython.core.display.HTML at 0x10a1d1d50>"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "And another way, if not iterating over the grid, is to use the `BlockGrid.flash()` method. `.flash()` takes an optional `display_time` keyword that\n",
      "controls for how long each frame is displayed. The default is 0.2 seconds."
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "grid = BlockGrid(3, 3)\n",
      "\n",
      "previous_block = None\n",
      "\n",
      "indices = [[(0, 0), (0, 2), (2, 0), (2, 2)], [(0, 1), (1, 0), (1, 2), (2, 1)]] * 10\n",
      "\n",
      "for ind in indices:\n",
      "    for i in ind:\n",
      "        grid[i[0], i[1]].green = 255\n",
      "    \n",
      "    grid.flash(display_time=0.1)\n",
      "    \n",
      "    for i in ind:\n",
      "        grid[i[0], i[1]].green = 0\n",
      "\n",
      "grid.show()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "html": [
        "<style type=\"text/css\">table.blockgrid {border: none;} .blockgrid tr {border: none;} .blockgrid td {padding: 0px;} #blocks6bbf0898-d39a-4c97-bbc2-7568b7915557 td {border: 1px solid white;}</style><table id=\"blocks6bbf0898-d39a-4c97-bbc2-7568b7915557\" class=\"blockgrid\"><tbody><tr><td title=\"Index: [0, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [0, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [0, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr><tr><td title=\"Index: [1, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [1, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [1, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr><tr><td title=\"Index: [2, 0]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [2, 1]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td><td title=\"Index: [2, 2]&#10;Color: (0, 0, 0)\" style=\"width: 20px; height: 20px;background-color: rgb(0, 0, 0);\"></td></tr></tbody></table>"
       ],
       "output_type": "display_data",
       "text": [
        "<IPython.core.display.HTML at 0x10c516890>"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}