{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Object-Oriented Programming\n",
    "\n",
    "Review of terms:\n",
    "\n",
    "* class\n",
    "* instance\n",
    "* method\n",
    "* global variables\n",
    "* types/classes with lowercase first letters are primitives (int, float, double, boolean)\n",
    "* constructor (none needed if no paramaters)\n",
    "* this\n",
    "* parameters, arguments"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "        var component = document.getElementById(\"sketch_3\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"state_3\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"controls_div_3\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "            // FIXME: Stop all previously running versions (?)\n",
       "            var processingInstance = Processing.getInstanceById(\"canvas_3\");\n",
       "            if (processingInstance != undefined && processingInstance.isRunning())\n",
       "                processingInstance.noLoop();\n",
       "        });\n",
       "\n",
       "\n",
       "        var output_area = this;\n",
       "        // find my cell element\n",
       "        var cell_element = output_area.element.parents('.cell');\n",
       "        // which cell is it?\n",
       "        var cell_idx = Jupyter.notebook.get_cell_elements().index(cell_element);\n",
       "        // get the cell object\n",
       "        var cell = Jupyter.notebook.get_cell(cell_idx);\n",
       "\n",
       "        function jyp_print(cell, newline) {\n",
       "            return function(message) {\n",
       "                cell.get_callbacks().iopub.output({header: {\"msg_type\": \"stream\"},\n",
       "                                                   content: {text: message + newline,\n",
       "                                                             name: \"stdout\"}});\n",
       "            }\n",
       "        }\n",
       "        window.jyp_println = jyp_print(cell, \"\\n\");\n",
       "        window.jyp_print = jyp_print(cell, \"\");\n",
       "\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "           Processing.logger.println = jyp_print(cell, \"\\n\");\n",
       "           Processing.logger.print = jyp_print(cell, \"\");\n",
       "        });\n",
       "\n",
       "\n",
       "        "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "\n",
       "<div id=\"canvas_div_3\">\n",
       "  <b>Sketch #3:</b><br/>\n",
       "  <canvas id=\"canvas_3\"></canvas><br/>\n",
       "</div>\n",
       "<div id=\"controls_div_3\">\n",
       "  <button id=\"run_button_3\" onclick=\"startSketch('3');\">\n",
       "    <i class=\"fa fa-play-circle-o\" style=\"size: 2em;\"></i>\n",
       "        Run\n",
       "  </button>\n",
       "  <button id=\"pause_button_3\" onclick=\"pauseSketch('3');\">\n",
       "    <i class=\"fa fa-pause\" style=\"size: 2em;\"></i>\n",
       "        Pause\n",
       "  </button>\n",
       "  <button id=\"setup_button_3\" onclick=\"setupSketch('3');\">\n",
       "    setup()\n",
       "  </button>\n",
       "  <button id=\"draw_button_3\" onclick=\"drawSketch('3');\">\n",
       "    draw()\n",
       "  </button>\n",
       "</div>\n",
       "<b>Sketch #3 state:</b> <span id=\"state_3\">Loading...</span><br/>\n",
       "<script>\n",
       "\n",
       "function change_button(button, disable) {\n",
       "    button.disabled = disable;\n",
       "    if (disable) {\n",
       "        button.style.color = \"grey\";\n",
       "    } else {\n",
       "        button.style.color = \"black\";\n",
       "    }\n",
       "}\n",
       "\n",
       "function startSketch(id) {\n",
       "    switchSketchState(id, true);\n",
       "}\n",
       "\n",
       "function pauseSketch(id) {\n",
       "    switchSketchState(id, false);\n",
       "}\n",
       "\n",
       "function drawSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Drawing...\";\n",
       "            try {\n",
       "                processingInstance.redraw();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Drawing... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No drawing() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function setupSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.setup != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Setting up...\";\n",
       "            try {\n",
       "                processingInstance.setup();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Setting up... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No setup() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function switchSketchState(id, on) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (on) {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Running...\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"green\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id),  true);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), true);\n",
       "        processingInstance.loop();  // call Processing loop() function\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Paused.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "        processingInstance.noLoop(); // stop animation, call noLoop()\n",
       "    }\n",
       "}\n",
       "\n",
       "require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function () {\n",
       "    var processingCode = 'class Human {\\n    String name;\\n    \\n    Human(String x) {\\n            name = x;\\n    }\\n    \\n    void speak() {\\n        println(\"I\\'m a human\");\\n    }\\n}\\n\\nclass Monkey {\\n    void speak() {\\n        println(\"I\\'m a monkey\");\\n    }\\n}\\n\\nHuman human0;\\nHuman human1;\\nMonkey monkey0;\\n\\nvoid setup() {\\n    human0 = new Human(\"Kevin\");\\n    human1 = new Human(\"Sylvia\");\\n    monkey0 = new Monkey();\\n}\\n\\nvoid draw() {\\n    human0.speak();\\n    human1.speak();\\n    monkey0.speak();\\n    noLoop();\\n}';\n",
       "    var cc;\n",
       "    var processingInstance;\n",
       "    var has_error = false;\n",
       "\n",
       "    try {\n",
       "        cc = Processing.compile(processingCode);\n",
       "    } catch (e) {\n",
       "        console.log(e);\n",
       "        cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "        document.getElementById(\"state_3\").innerHTML = e.toString();\n",
       "        document.getElementById(\"state_3\").style.color = \"red\";\n",
       "        has_error = true;\n",
       "    }\n",
       "    if (cc != undefined) {\n",
       "        try {\n",
       "            processingInstance = new Processing(\"canvas_3\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "        } catch (e) {\n",
       "            console.log(e);\n",
       "            cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "            document.getElementById(\"state_3\").innerHTML = e.toString();\n",
       "            document.getElementById(\"state_3\").style.color = \"red\";\n",
       "            processingInstance = new Processing(\"canvas_3\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "            has_error = true;\n",
       "        }\n",
       "    }\n",
       "    if (processingInstance != undefined) {\n",
       "        setTimeout(function () {\n",
       "            // Canvas:\n",
       "            if (processingInstance.externals.context === undefined) {\n",
       "                document.getElementById(\"canvas_div_3\").style.display = \"none\";\n",
       "            }\n",
       "        }, 100);\n",
       "        // Controls:\n",
       "        if (!(processingInstance.isRunning() && processingInstance.draw != undefined)) {\n",
       "            document.getElementById(\"controls_div_3\").style.display = \"none\";\n",
       "        }\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_3\").innerHTML = \"Running...\";\n",
       "                document.getElementById(\"state_3\").style.color = \"green\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_3\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_3\"), false);\n",
       "            change_button(document.getElementById(\"setup_button_3\"),  true);\n",
       "            change_button(document.getElementById(\"draw_button_3\"), true);\n",
       "        } else {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_3\").innerHTML = \"Done.\";\n",
       "                document.getElementById(\"state_3\").style.color = \"blue\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_3\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_3\"), true);\n",
       "            change_button(document.getElementById(\"setup_button_3\"),  processingInstance.setup == undefined);\n",
       "            change_button(document.getElementById(\"draw_button_3\"), true);\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"canvas_div_3\").style.display = \"none\";\n",
       "        document.getElementById(\"controls_div_3\").style.display = \"none\";\n",
       "        if (!has_error) {\n",
       "            document.getElementById(\"state_3\").innerHTML = \"Error.\";\n",
       "            document.getElementById(\"state_3\").style.color = \"red\";\n",
       "        }\n",
       "        change_button(document.getElementById(\"run_button_3\"), true);\n",
       "        change_button(document.getElementById(\"pause_button_3\"), true);\n",
       "        change_button(document.getElementById(\"setup_button_3\"),  true);\n",
       "        change_button(document.getElementById(\"draw_button_3\"), true);\n",
       "    }\n",
       "});\n",
       "\n",
       "</script>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "I'm a human\n",
      "I'm a human\n",
      "I'm a monkey\n"
     ]
    }
   ],
   "source": [
    "class Human {\n",
    "    String name;\n",
    "    \n",
    "    Human(String x) {\n",
    "            name = x;\n",
    "    }\n",
    "    \n",
    "    void speak() {\n",
    "        println(\"I'm a human\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class Monkey {\n",
    "    void speak() {\n",
    "        println(\"I'm a monkey\");\n",
    "    }\n",
    "}\n",
    "\n",
    "Human human0;\n",
    "Human human1;\n",
    "Monkey monkey0;\n",
    "\n",
    "void setup() {\n",
    "    human0 = new Human(\"Kevin\");\n",
    "    human1 = new Human(\"Sylvia\");\n",
    "    monkey0 = new Monkey();\n",
    "}\n",
    "\n",
    "void draw() {\n",
    "    human0.speak();\n",
    "    human1.speak();\n",
    "    monkey0.speak();\n",
    "    noLoop();\n",
    "}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Arrays of Objects\n",
    "\n",
    "Review of ideas:\n",
    "\n",
    "* array\n",
    "* declare array\n",
    "* create space for the array\n",
    "* create the instances"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "        var component = document.getElementById(\"sketch_8\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"state_8\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"controls_div_8\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "            // FIXME: Stop all previously running versions (?)\n",
       "            var processingInstance = Processing.getInstanceById(\"canvas_8\");\n",
       "            if (processingInstance != undefined && processingInstance.isRunning())\n",
       "                processingInstance.noLoop();\n",
       "        });\n",
       "\n",
       "\n",
       "        var output_area = this;\n",
       "        // find my cell element\n",
       "        var cell_element = output_area.element.parents('.cell');\n",
       "        // which cell is it?\n",
       "        var cell_idx = Jupyter.notebook.get_cell_elements().index(cell_element);\n",
       "        // get the cell object\n",
       "        var cell = Jupyter.notebook.get_cell(cell_idx);\n",
       "\n",
       "        function jyp_print(cell, newline) {\n",
       "            return function(message) {\n",
       "                cell.get_callbacks().iopub.output({header: {\"msg_type\": \"stream\"},\n",
       "                                                   content: {text: message + newline,\n",
       "                                                             name: \"stdout\"}});\n",
       "            }\n",
       "        }\n",
       "        window.jyp_println = jyp_print(cell, \"\\n\");\n",
       "        window.jyp_print = jyp_print(cell, \"\");\n",
       "\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "           Processing.logger.println = jyp_print(cell, \"\\n\");\n",
       "           Processing.logger.print = jyp_print(cell, \"\");\n",
       "        });\n",
       "\n",
       "\n",
       "        "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "\n",
       "<div id=\"canvas_div_8\">\n",
       "  <b>Sketch #8:</b><br/>\n",
       "  <canvas id=\"canvas_8\"></canvas><br/>\n",
       "</div>\n",
       "<div id=\"controls_div_8\">\n",
       "  <button id=\"run_button_8\" onclick=\"startSketch('8');\">\n",
       "    <i class=\"fa fa-play-circle-o\" style=\"size: 2em;\"></i>\n",
       "        Run\n",
       "  </button>\n",
       "  <button id=\"pause_button_8\" onclick=\"pauseSketch('8');\">\n",
       "    <i class=\"fa fa-pause\" style=\"size: 2em;\"></i>\n",
       "        Pause\n",
       "  </button>\n",
       "  <button id=\"setup_button_8\" onclick=\"setupSketch('8');\">\n",
       "    setup()\n",
       "  </button>\n",
       "  <button id=\"draw_button_8\" onclick=\"drawSketch('8');\">\n",
       "    draw()\n",
       "  </button>\n",
       "</div>\n",
       "<b>Sketch #8 state:</b> <span id=\"state_8\">Loading...</span><br/>\n",
       "<script>\n",
       "\n",
       "function change_button(button, disable) {\n",
       "    button.disabled = disable;\n",
       "    if (disable) {\n",
       "        button.style.color = \"grey\";\n",
       "    } else {\n",
       "        button.style.color = \"black\";\n",
       "    }\n",
       "}\n",
       "\n",
       "function startSketch(id) {\n",
       "    switchSketchState(id, true);\n",
       "}\n",
       "\n",
       "function pauseSketch(id) {\n",
       "    switchSketchState(id, false);\n",
       "}\n",
       "\n",
       "function drawSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Drawing...\";\n",
       "            try {\n",
       "                processingInstance.redraw();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Drawing... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No drawing() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function setupSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.setup != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Setting up...\";\n",
       "            try {\n",
       "                processingInstance.setup();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Setting up... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No setup() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function switchSketchState(id, on) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (on) {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Running...\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"green\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id),  true);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), true);\n",
       "        processingInstance.loop();  // call Processing loop() function\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Paused.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "        processingInstance.noLoop(); // stop animation, call noLoop()\n",
       "    }\n",
       "}\n",
       "\n",
       "require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function () {\n",
       "    var processingCode = 'class Human {\\n    void speak() {\\n        println(\"I\\'m a human\");\\n    }\\n}\\n\\nclass Monkey {\\n    void speak() {\\n        println(\"I\\'m a monkey\");\\n    }\\n}\\n\\nHuman[] human = new Human[25];\\nMonkey[] monkey = new Monkey[25];\\n\\nvoid setup() {\\n    for (int i=0; i < human.length; i++) {\\n        human[i] = new Human();\\n    }\\n    for (int i=0; i < monkey.length; i++) {\\n        monkey[i] = new Monkey();\\n    }\\n}\\n\\nvoid draw() {\\n    for (int i=0; i < human.length; i++) {\\n        human[i].speak();\\n    }\\n    for (int i=0; i < monkey.length; i++) {\\n        monkey[i].speak();\\n    }\\n    noLoop();\\n}';\n",
       "    var cc;\n",
       "    var processingInstance;\n",
       "    var has_error = false;\n",
       "\n",
       "    try {\n",
       "        cc = Processing.compile(processingCode);\n",
       "    } catch (e) {\n",
       "        console.log(e);\n",
       "        cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "        document.getElementById(\"state_8\").innerHTML = e.toString();\n",
       "        document.getElementById(\"state_8\").style.color = \"red\";\n",
       "        has_error = true;\n",
       "    }\n",
       "    if (cc != undefined) {\n",
       "        try {\n",
       "            processingInstance = new Processing(\"canvas_8\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "        } catch (e) {\n",
       "            console.log(e);\n",
       "            cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "            document.getElementById(\"state_8\").innerHTML = e.toString();\n",
       "            document.getElementById(\"state_8\").style.color = \"red\";\n",
       "            processingInstance = new Processing(\"canvas_8\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "            has_error = true;\n",
       "        }\n",
       "    }\n",
       "    if (processingInstance != undefined) {\n",
       "        setTimeout(function () {\n",
       "            // Canvas:\n",
       "            if (processingInstance.externals.context === undefined) {\n",
       "                document.getElementById(\"canvas_div_8\").style.display = \"none\";\n",
       "            }\n",
       "        }, 100);\n",
       "        // Controls:\n",
       "        if (!(processingInstance.isRunning() && processingInstance.draw != undefined)) {\n",
       "            document.getElementById(\"controls_div_8\").style.display = \"none\";\n",
       "        }\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_8\").innerHTML = \"Running...\";\n",
       "                document.getElementById(\"state_8\").style.color = \"green\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_8\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_8\"), false);\n",
       "            change_button(document.getElementById(\"setup_button_8\"),  true);\n",
       "            change_button(document.getElementById(\"draw_button_8\"), true);\n",
       "        } else {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_8\").innerHTML = \"Done.\";\n",
       "                document.getElementById(\"state_8\").style.color = \"blue\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_8\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_8\"), true);\n",
       "            change_button(document.getElementById(\"setup_button_8\"),  processingInstance.setup == undefined);\n",
       "            change_button(document.getElementById(\"draw_button_8\"), true);\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"canvas_div_8\").style.display = \"none\";\n",
       "        document.getElementById(\"controls_div_8\").style.display = \"none\";\n",
       "        if (!has_error) {\n",
       "            document.getElementById(\"state_8\").innerHTML = \"Error.\";\n",
       "            document.getElementById(\"state_8\").style.color = \"red\";\n",
       "        }\n",
       "        change_button(document.getElementById(\"run_button_8\"), true);\n",
       "        change_button(document.getElementById(\"pause_button_8\"), true);\n",
       "        change_button(document.getElementById(\"setup_button_8\"),  true);\n",
       "        change_button(document.getElementById(\"draw_button_8\"), true);\n",
       "    }\n",
       "});\n",
       "\n",
       "</script>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n",
      "I'm a monkey\n"
     ]
    }
   ],
   "source": [
    "class Human {\n",
    "    void speak() {\n",
    "        println(\"I'm a human\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class Monkey {\n",
    "    void speak() {\n",
    "        println(\"I'm a monkey\");\n",
    "    }\n",
    "}\n",
    "\n",
    "Human[] human = new Human[25];\n",
    "Monkey[] monkey = new Monkey[25];\n",
    "\n",
    "void setup() {\n",
    "    for (int i=0; i < human.length; i++) {\n",
    "        human[i] = new Human();\n",
    "    }\n",
    "    for (int i=0; i < monkey.length; i++) {\n",
    "        monkey[i] = new Monkey();\n",
    "    }\n",
    "}\n",
    "\n",
    "void draw() {\n",
    "    for (int i=0; i < human.length; i++) {\n",
    "        human[i].speak();\n",
    "    }\n",
    "    for (int i=0; i < monkey.length; i++) {\n",
    "        monkey[i].speak();\n",
    "    }\n",
    "    noLoop();\n",
    "}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Object-Oriented Programming - Inheritance "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "        var component = document.getElementById(\"sketch_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"state_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"controls_div_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "            // FIXME: Stop all previously running versions (?)\n",
       "            var processingInstance = Processing.getInstanceById(\"canvas_4\");\n",
       "            if (processingInstance != undefined && processingInstance.isRunning())\n",
       "                processingInstance.noLoop();\n",
       "        });\n",
       "\n",
       "\n",
       "        var output_area = this;\n",
       "        // find my cell element\n",
       "        var cell_element = output_area.element.parents('.cell');\n",
       "        // which cell is it?\n",
       "        var cell_idx = Jupyter.notebook.get_cell_elements().index(cell_element);\n",
       "        // get the cell object\n",
       "        var cell = Jupyter.notebook.get_cell(cell_idx);\n",
       "\n",
       "        function jyp_print(cell, newline) {\n",
       "            return function(message) {\n",
       "                cell.get_callbacks().iopub.output({header: {\"msg_type\": \"stream\"},\n",
       "                                                   content: {text: message + newline,\n",
       "                                                             name: \"stdout\"}});\n",
       "            }\n",
       "        }\n",
       "        window.jyp_println = jyp_print(cell, \"\\n\");\n",
       "        window.jyp_print = jyp_print(cell, \"\");\n",
       "\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "           Processing.logger.println = jyp_print(cell, \"\\n\");\n",
       "           Processing.logger.print = jyp_print(cell, \"\");\n",
       "        });\n",
       "\n",
       "\n",
       "        "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "\n",
       "<div id=\"canvas_div_4\">\n",
       "  <b>Sketch #4:</b><br/>\n",
       "  <canvas id=\"canvas_4\"></canvas><br/>\n",
       "</div>\n",
       "<div id=\"controls_div_4\">\n",
       "  <button id=\"run_button_4\" onclick=\"startSketch('4');\">\n",
       "    <i class=\"fa fa-play-circle-o\" style=\"size: 2em;\"></i>\n",
       "        Run\n",
       "  </button>\n",
       "  <button id=\"pause_button_4\" onclick=\"pauseSketch('4');\">\n",
       "    <i class=\"fa fa-pause\" style=\"size: 2em;\"></i>\n",
       "        Pause\n",
       "  </button>\n",
       "  <button id=\"setup_button_4\" onclick=\"setupSketch('4');\">\n",
       "    setup()\n",
       "  </button>\n",
       "  <button id=\"draw_button_4\" onclick=\"drawSketch('4');\">\n",
       "    draw()\n",
       "  </button>\n",
       "</div>\n",
       "<b>Sketch #4 state:</b> <span id=\"state_4\">Loading...</span><br/>\n",
       "<script>\n",
       "\n",
       "function change_button(button, disable) {\n",
       "    button.disabled = disable;\n",
       "    if (disable) {\n",
       "        button.style.color = \"grey\";\n",
       "    } else {\n",
       "        button.style.color = \"black\";\n",
       "    }\n",
       "}\n",
       "\n",
       "function startSketch(id) {\n",
       "    switchSketchState(id, true);\n",
       "}\n",
       "\n",
       "function pauseSketch(id) {\n",
       "    switchSketchState(id, false);\n",
       "}\n",
       "\n",
       "function drawSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Drawing...\";\n",
       "            try {\n",
       "                processingInstance.redraw();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Drawing... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No drawing() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function setupSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.setup != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Setting up...\";\n",
       "            try {\n",
       "                processingInstance.setup();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Setting up... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No setup() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function switchSketchState(id, on) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (on) {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Running...\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"green\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id),  true);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), true);\n",
       "        processingInstance.loop();  // call Processing loop() function\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Paused.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "        processingInstance.noLoop(); // stop animation, call noLoop()\n",
       "    }\n",
       "}\n",
       "\n",
       "require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function () {\n",
       "    var processingCode = 'class Primate {\\n    void speak() {\\n        println(\"I\\'m a primate\");\\n    }\\n}\\n\\nclass Human extends Primate {\\n    void speak() {\\n        println(\"I\\'m a human\");\\n    }\\n}\\n\\nclass Monkey extends Primate {\\n    void speak() {\\n        println(\"I\\'m a monkey\");\\n    }\\n}\\n\\nPrimate p1;\\nHuman h1;\\nMonkey m1;\\n\\nvoid setup() {\\n    p1 = new Primate();\\n    h1 = new Human();\\n    m1 = new Monkey();\\n}\\n\\nvoid draw() {\\n    p1.speak();\\n    h1.speak();\\n    m1.speak();\\n    noLoop();\\n}';\n",
       "    var cc;\n",
       "    var processingInstance;\n",
       "    var has_error = false;\n",
       "\n",
       "    try {\n",
       "        cc = Processing.compile(processingCode);\n",
       "    } catch (e) {\n",
       "        console.log(e);\n",
       "        cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "        document.getElementById(\"state_4\").innerHTML = e.toString();\n",
       "        document.getElementById(\"state_4\").style.color = \"red\";\n",
       "        has_error = true;\n",
       "    }\n",
       "    if (cc != undefined) {\n",
       "        try {\n",
       "            processingInstance = new Processing(\"canvas_4\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "        } catch (e) {\n",
       "            console.log(e);\n",
       "            cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "            document.getElementById(\"state_4\").innerHTML = e.toString();\n",
       "            document.getElementById(\"state_4\").style.color = \"red\";\n",
       "            processingInstance = new Processing(\"canvas_4\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "            has_error = true;\n",
       "        }\n",
       "    }\n",
       "    if (processingInstance != undefined) {\n",
       "        setTimeout(function () {\n",
       "            // Canvas:\n",
       "            if (processingInstance.externals.context === undefined) {\n",
       "                document.getElementById(\"canvas_div_4\").style.display = \"none\";\n",
       "            }\n",
       "        }, 100);\n",
       "        // Controls:\n",
       "        if (!(processingInstance.isRunning() && processingInstance.draw != undefined)) {\n",
       "            document.getElementById(\"controls_div_4\").style.display = \"none\";\n",
       "        }\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_4\").innerHTML = \"Running...\";\n",
       "                document.getElementById(\"state_4\").style.color = \"green\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_4\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_4\"), false);\n",
       "            change_button(document.getElementById(\"setup_button_4\"),  true);\n",
       "            change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "        } else {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_4\").innerHTML = \"Done.\";\n",
       "                document.getElementById(\"state_4\").style.color = \"blue\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_4\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_4\"), true);\n",
       "            change_button(document.getElementById(\"setup_button_4\"),  processingInstance.setup == undefined);\n",
       "            change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"canvas_div_4\").style.display = \"none\";\n",
       "        document.getElementById(\"controls_div_4\").style.display = \"none\";\n",
       "        if (!has_error) {\n",
       "            document.getElementById(\"state_4\").innerHTML = \"Error.\";\n",
       "            document.getElementById(\"state_4\").style.color = \"red\";\n",
       "        }\n",
       "        change_button(document.getElementById(\"run_button_4\"), true);\n",
       "        change_button(document.getElementById(\"pause_button_4\"), true);\n",
       "        change_button(document.getElementById(\"setup_button_4\"),  true);\n",
       "        change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "    }\n",
       "});\n",
       "\n",
       "</script>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "I'm a primate\n",
      "I'm a human\n",
      "I'm a monkey\n"
     ]
    }
   ],
   "source": [
    "class Primate {\n",
    "    void speak() {\n",
    "        println(\"I'm a primate\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class Human extends Primate {\n",
    "    void speak() {\n",
    "        println(\"I'm a human\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class Monkey extends Primate {\n",
    "    void speak() {\n",
    "        println(\"I'm a monkey\");\n",
    "    }\n",
    "}\n",
    "\n",
    "Primate primate0;\n",
    "Human human0;\n",
    "Monkey monkey0;\n",
    "\n",
    "void setup() {\n",
    "    primate0 = new Primate();\n",
    "    human0 = new Human();\n",
    "    monkey0 = new Monkey();\n",
    "}\n",
    "\n",
    "void draw() {\n",
    "    primate0.speak();\n",
    "    human0.speak();\n",
    "    monkey0.speak();\n",
    "    noLoop();\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "        var component = document.getElementById(\"sketch_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"state_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"controls_div_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "            // FIXME: Stop all previously running versions (?)\n",
       "            var processingInstance = Processing.getInstanceById(\"canvas_4\");\n",
       "            if (processingInstance != undefined && processingInstance.isRunning())\n",
       "                processingInstance.noLoop();\n",
       "        });\n",
       "\n",
       "\n",
       "        var output_area = this;\n",
       "        // find my cell element\n",
       "        var cell_element = output_area.element.parents('.cell');\n",
       "        // which cell is it?\n",
       "        var cell_idx = Jupyter.notebook.get_cell_elements().index(cell_element);\n",
       "        // get the cell object\n",
       "        var cell = Jupyter.notebook.get_cell(cell_idx);\n",
       "\n",
       "        function jyp_print(cell, newline) {\n",
       "            return function(message) {\n",
       "                cell.get_callbacks().iopub.output({header: {\"msg_type\": \"stream\"},\n",
       "                                                   content: {text: message + newline,\n",
       "                                                             name: \"stdout\"}});\n",
       "            }\n",
       "        }\n",
       "        window.jyp_println = jyp_print(cell, \"\\n\");\n",
       "        window.jyp_print = jyp_print(cell, \"\");\n",
       "\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "           Processing.logger.println = jyp_print(cell, \"\\n\");\n",
       "           Processing.logger.print = jyp_print(cell, \"\");\n",
       "        });\n",
       "\n",
       "\n",
       "        "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
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     "data": {
      "text/html": [
       "\n",
       "<div id=\"canvas_div_4\">\n",
       "  <b>Sketch #4:</b><br/>\n",
       "  <canvas id=\"canvas_4\"></canvas><br/>\n",
       "</div>\n",
       "<div id=\"controls_div_4\">\n",
       "  <button id=\"run_button_4\" onclick=\"startSketch('4');\">\n",
       "    <i class=\"fa fa-play-circle-o\" style=\"size: 2em;\"></i>\n",
       "        Run\n",
       "  </button>\n",
       "  <button id=\"pause_button_4\" onclick=\"pauseSketch('4');\">\n",
       "    <i class=\"fa fa-pause\" style=\"size: 2em;\"></i>\n",
       "        Pause\n",
       "  </button>\n",
       "  <button id=\"setup_button_4\" onclick=\"setupSketch('4');\">\n",
       "    setup()\n",
       "  </button>\n",
       "  <button id=\"draw_button_4\" onclick=\"drawSketch('4');\">\n",
       "    draw()\n",
       "  </button>\n",
       "</div>\n",
       "<b>Sketch #4 state:</b> <span id=\"state_4\">Loading...</span><br/>\n",
       "<script>\n",
       "\n",
       "function change_button(button, disable) {\n",
       "    button.disabled = disable;\n",
       "    if (disable) {\n",
       "        button.style.color = \"grey\";\n",
       "    } else {\n",
       "        button.style.color = \"black\";\n",
       "    }\n",
       "}\n",
       "\n",
       "function startSketch(id) {\n",
       "    switchSketchState(id, true);\n",
       "}\n",
       "\n",
       "function pauseSketch(id) {\n",
       "    switchSketchState(id, false);\n",
       "}\n",
       "\n",
       "function drawSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Drawing...\";\n",
       "            try {\n",
       "                processingInstance.redraw();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Drawing... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No drawing() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function setupSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.setup != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Setting up...\";\n",
       "            try {\n",
       "                processingInstance.setup();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Setting up... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
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       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No setup() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function switchSketchState(id, on) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (on) {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Running...\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"green\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id),  true);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), true);\n",
       "        processingInstance.loop();  // call Processing loop() function\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Paused.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "        processingInstance.noLoop(); // stop animation, call noLoop()\n",
       "    }\n",
       "}\n",
       "\n",
       "require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function () {\n",
       "    var processingCode = 'class Primate {\\n    void speak() {\\n        println(\"I\\'m a primate\");\\n    }\\n}\\n\\nclass Human extends Primate {\\n    void speak() {\\n        println(\"I\\'m a human\");\\n    }\\n}\\n\\nclass Monkey extends Primate {\\n    void speak() {\\n        println(\"I\\'m a monkey\");\\n    }\\n}\\n\\nPrimate[] primate = new Primate[25];\\n\\nvoid setup() {\\n    for (int i=0; i < primate.length; i++) {\\n        if (i % 2 == 0) {\\n            primate[i] = new Human();\\n        } else {\\n            primate[i] = new Monkey();\\n        }\\n    }\\n}\\n\\nvoid draw() {\\n    for (int i=0; i < primate.length; i++) {\\n        primate[i].speak();\\n    }\\n    noLoop();\\n}';\n",
       "    var cc;\n",
       "    var processingInstance;\n",
       "    var has_error = false;\n",
       "\n",
       "    try {\n",
       "        cc = Processing.compile(processingCode);\n",
       "    } catch (e) {\n",
       "        console.log(e);\n",
       "        cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "        document.getElementById(\"state_4\").innerHTML = e.toString();\n",
       "        document.getElementById(\"state_4\").style.color = \"red\";\n",
       "        has_error = true;\n",
       "    }\n",
       "    if (cc != undefined) {\n",
       "        try {\n",
       "            processingInstance = new Processing(\"canvas_4\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "        } catch (e) {\n",
       "            console.log(e);\n",
       "            cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "            document.getElementById(\"state_4\").innerHTML = e.toString();\n",
       "            document.getElementById(\"state_4\").style.color = \"red\";\n",
       "            processingInstance = new Processing(\"canvas_4\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "            has_error = true;\n",
       "        }\n",
       "    }\n",
       "    if (processingInstance != undefined) {\n",
       "        setTimeout(function () {\n",
       "            // Canvas:\n",
       "            if (processingInstance.externals.context === undefined) {\n",
       "                document.getElementById(\"canvas_div_4\").style.display = \"none\";\n",
       "            }\n",
       "        }, 100);\n",
       "        // Controls:\n",
       "        if (!(processingInstance.isRunning() && processingInstance.draw != undefined)) {\n",
       "            document.getElementById(\"controls_div_4\").style.display = \"none\";\n",
       "        }\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_4\").innerHTML = \"Running...\";\n",
       "                document.getElementById(\"state_4\").style.color = \"green\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_4\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_4\"), false);\n",
       "            change_button(document.getElementById(\"setup_button_4\"),  true);\n",
       "            change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "        } else {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_4\").innerHTML = \"Done.\";\n",
       "                document.getElementById(\"state_4\").style.color = \"blue\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_4\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_4\"), true);\n",
       "            change_button(document.getElementById(\"setup_button_4\"),  processingInstance.setup == undefined);\n",
       "            change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"canvas_div_4\").style.display = \"none\";\n",
       "        document.getElementById(\"controls_div_4\").style.display = \"none\";\n",
       "        if (!has_error) {\n",
       "            document.getElementById(\"state_4\").innerHTML = \"Error.\";\n",
       "            document.getElementById(\"state_4\").style.color = \"red\";\n",
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       "        change_button(document.getElementById(\"run_button_4\"), true);\n",
       "        change_button(document.getElementById(\"pause_button_4\"), true);\n",
       "        change_button(document.getElementById(\"setup_button_4\"),  true);\n",
       "        change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "    }\n",
       "});\n",
       "\n",
       "</script>\n"
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      "text/plain": [
       "<IPython.core.display.HTML object>"
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     "metadata": {},
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     "output_type": "stream",
     "text": [
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n",
      "I'm a monkey\n",
      "I'm a human\n"
     ]
    }
   ],
   "source": [
    "class Primate {\n",
    "    void speak() {\n",
    "        println(\"I'm a primate\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class Human extends Primate {\n",
    "    void speak() {\n",
    "        println(\"I'm a human\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class Monkey extends Primate {\n",
    "    void speak() {\n",
    "        println(\"I'm a monkey\");\n",
    "    }\n",
    "}\n",
    "\n",
    "class SpiderMonkey extends Monkey {\n",
    "    void speak() {\n",
    "        println(\"eeee eee ooo oo\");\n",
    "    }\n",
    "}\n",
    "\n",
    "Primate[] primate = new Primate[25];\n",
    "\n",
    "void setup() {\n",
    "    for (int i=0; i < primate.length; i++) {\n",
    "        if (i % 2 == 0) {\n",
    "            primate[i] = new Human();\n",
    "        } else {\n",
    "            primate[i] = new Monkey();\n",
    "        }\n",
    "    }\n",
    "}\n",
    "\n",
    "void draw() {\n",
    "    for (int i=0; i < primate.length; i++) {\n",
    "        primate[i].speak();\n",
    "    }\n",
    "    noLoop();\n",
    "}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "New ideas:\n",
    "\n",
    "* extend a class\n",
    "* subclass\n",
    "* super class, or base class\n",
    "* method overrides\n",
    "* polymorphism\n",
    "\n",
    "1. Primate is the base class, or super class\n",
    "2. Human and Monkey are subclasses\n",
    "3. Treating all of the objects the same, but having the methods do their specifics: polymorphism\n",
    "\n",
    "\n",
    "See pages 223 - 232 of your textbook for additional information."
   ]
  },
  {
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