{
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     "data": {
      "application/javascript": [
       "\n",
       "        var component = document.getElementById(\"sketch_18\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"state_18\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"controls_div_18\");\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_18\");\n",
       "            if (processingInstance != undefined && processingInstance.isRunning())\n",
       "                processingInstance.noLoop();\n",
       "        });\n",
       "        "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
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    {
     "data": {
      "text/html": [
       "\n",
       "<div id=\"canvas_div_18\">\n",
       "  <b>Sketch #18:</b><br/>\n",
       "  <canvas id=\"canvas_18\"></canvas><br/>\n",
       "</div>\n",
       "<div id=\"controls_div_18\">\n",
       "  <button id=\"run_button_18\" onclick=\"startSketch('18');\">\n",
       "    <i class=\"fa fa-play-circle-o\" style=\"size: 2em;\"></i>\n",
       "        Run\n",
       "  </button>\n",
       "  <button id=\"pause_button_18\" onclick=\"pauseSketch('18');\">\n",
       "    <i class=\"fa fa-pause\" style=\"size: 2em;\"></i>\n",
       "        Pause\n",
       "  </button>\n",
       "  <button id=\"setup_button_18\" onclick=\"setupSketch('18');\">\n",
       "    setup()\n",
       "  </button>\n",
       "  <button id=\"draw_button_18\" onclick=\"drawSketch('18');\">\n",
       "    draw()\n",
       "  </button>\n",
       "</div>\n",
       "<b>Sketch #18 state:</b> <span id=\"state_18\">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 = '\\nvoid setup() {\\n   size(500, 500); \\n}\\n\\nvoid draw() {\\n    background(0, 0, 127);\\n    //drawSnowman(250, 250, 500 - mouseX, 500 - mouseY);\\n    drawSnowman(100, 100, 50, 75);\\n    drawSnowman(300, 200, 100, 100);\\n    drawSnowman(400, 50, 10, 10);\\n}\\n\\n// define the function\\nvoid drawSnowman(float x,  float y, float w, float h) {\\n    noStroke();\\n    // body:\\n    ellipse(x, y, w, h);\\n    // head:\\n    float headHeight = h * .40;\\n    float headWidth = w * .40;\\n    float headY = y - h/3 - headHeight/2;\\n    ellipse(x, headY, headWidth, headHeight);\\n    // ears:\\n    float earWidth = headWidth * .30;\\n    float earHeight = headHeight * 2.0;\\n    ellipse(x - headWidth * .3, headY - earHeight/2, earWidth, earHeight);\\n    ellipse(x + headWidth * .3, headY - earHeight/2, earWidth, earHeight);\\n}';\n",
       "    var cc;\n",
       "    var processingInstance;\n",
       "    var has_error = false;\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_18\").innerHTML = e.toString();\n",
       "        document.getElementById(\"state_18\").style.color = \"red\";\n",
       "        has_error = true;\n",
       "    }\n",
       "    if (cc != undefined) {\n",
       "        try {\n",
       "            processingInstance = new Processing(\"canvas_18\", cc);\n",
       "        } catch (e) {\n",
       "            console.log(e);\n",
       "            cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "            document.getElementById(\"state_18\").innerHTML = e.toString();\n",
       "            document.getElementById(\"state_18\").style.color = \"red\";\n",
       "            processingInstance = new Processing(\"canvas_18\", cc);\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_18\").style.display = \"none\";\n",
       "            }\n",
       "        }, 100);\n",
       "        // Controls:\n",
       "        if (!(processingInstance.isRunning() && processingInstance.draw != undefined)) {\n",
       "            document.getElementById(\"controls_div_18\").style.display = \"none\";\n",
       "        }\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_18\").innerHTML = \"Running...\";\n",
       "                document.getElementById(\"state_18\").style.color = \"green\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_18\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_18\"), false);\n",
       "            change_button(document.getElementById(\"setup_button_18\"),  true);\n",
       "            change_button(document.getElementById(\"draw_button_18\"), true);\n",
       "        } else {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_18\").innerHTML = \"Done.\";\n",
       "                document.getElementById(\"state_18\").style.color = \"blue\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_18\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_18\"), true);\n",
       "            change_button(document.getElementById(\"setup_button_18\"),  processingInstance.setup == undefined);\n",
       "            change_button(document.getElementById(\"draw_button_18\"), true);\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"canvas_div_18\").style.display = \"none\";\n",
       "        document.getElementById(\"controls_div_18\").style.display = \"none\";\n",
       "        if (!has_error) {\n",
       "            document.getElementById(\"state_18\").innerHTML = \"Error.\";\n",
       "            document.getElementById(\"state_18\").style.color = \"red\";\n",
       "        }\n",
       "        change_button(document.getElementById(\"run_button_18\"), true);\n",
       "        change_button(document.getElementById(\"pause_button_18\"), true);\n",
       "        change_button(document.getElementById(\"setup_button_18\"),  true);\n",
       "        change_button(document.getElementById(\"draw_button_18\"), true);\n",
       "    }\n",
       "});\n",
       "\n",
       "</script>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "\n",
    "void setup() {\n",
    "   size(500, 500); \n",
    "}\n",
    "\n",
    "void draw() {\n",
    "    background(0, 0, 127);\n",
    "    //drawSnowman(250, 250, 500 - mouseX, 500 - mouseY);\n",
    "    drawSnowman(100, 100, 50, 75);\n",
    "    drawSnowman(300, 200, 100, 100);\n",
    "    drawSnowman(400, 50, 10, 10);\n",
    "}\n",
    "\n",
    "// define the function\n",
    "void drawSnowman(float x,  float y, float w, float h) {\n",
    "    noStroke();\n",
    "    // body:\n",
    "    ellipse(x, y, w, h);\n",
    "    // head:\n",
    "    float headHeight = h * .40;\n",
    "    float headWidth = w * .40;\n",
    "    float headY = y - h/3 - headHeight/2;\n",
    "    ellipse(x, headY, headWidth, headHeight);\n",
    "    // ears:\n",
    "    float earWidth = headWidth * .30;\n",
    "    float earHeight = headHeight * 2.0;\n",
    "    ellipse(x - headWidth * .3, headY - earHeight/2, earWidth, earHeight);\n",
    "    ellipse(x + headWidth * .3, headY - earHeight/2, earWidth, earHeight);\n",
    "}"
   ]
  },
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   "cell_type": "code",
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