demo.html

<!doctype html>
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<head>
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  <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
  <title>fin-hypergrid Demo</title>
  <script src="../webcomponentsjs/webcomponents.js"></script>
  <script src="../accountingjs/accounting.min.js"></script>
  <link rel="import" href="../paper-tabs/paper-tabs.html">
  <link rel="import" href="../paper-menu-button/paper-menu-button.html">

  <link rel="import" href="../core-pages/core-pages.html">
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  <link rel="import" href="polymer/html/fin-hypergrid.html">

  <style>
    body {
            transition: opacity 0.150s ease-in;
    }
    table.qtreedescription td:nth-child(2n) {
      color: blue;
    }
    table.qtreedescription {
      background: #CFD3DD;
    }
    .rotateHalf {
        opacity: 0;
    }
    fin-hypergrid {

    }
    paper-tabs {
        box-shadow: 0px 3px 2px rgba(0, 0, 0, 0.2);
    }
    core-header-panel {
        height: 100%;
        width: 100%;
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    }
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    }
    .centered {
        margin-left: auto;
        margin-right: auto;
        width: 50%;
        white-space: nowrap;
    }
    .description {
        padding-left: 8%;
        padding-right: 8%;
    }
    .theme-menu {
        width:140px;
        text-align:center;
        padding-top:12px;
        cursor: pointer;
    }

  </style>
</head>
<body unresolved fullbleed>
  <core-header-panel>

    <core-toolbar layout horizontal>

        <paper-menu-button class="nocollapse theme-menu">
            Themes
            <core-icon icon="arrow-drop-down"></core-icon>
            <paper-dropdown class="dropdown" transition="">
                <core-menu class="menu" style="width:140px;margin: 0px;">

                    <template is="auto-binding" id="themeDropDown" repeat="{{themes}}">
                      <paper-item onclick="selectTheme(this)">{{}}</paper-item>
                    </template>

                </core-menu>
            </paper-dropdown>
        </paper-menu-button>

        <paper-tabs selected="0" flex>
            <paper-tab>In Memory</paper-tab>
            <paper-tab>Default</paper-tab>
            <paper-tab>JSON</paper-tab>
            <paper-tab>Q</paper-tab>
            <paper-tab>Q Tree</paper-tab>
            <paper-tab>Game Of Life</paper-tab>
        </paper-tabs>

    </core-toolbar>

  <core-pages selected="0">

        <div vertical layout>
          <div class="description">
            <h3>fin-hypergrid-behavior-in-memory


            </h3> This element is a custom Polymer web component that is a demonstration of a simple subclass of the fin-hypergrid-behavior-default.  It demonstrates live high frequency updating of data, variable width columns, alternate cell renderers, and alternate cell editors(double click in various cells of column 'J').  Press Alt/Option to toggle the column picker.  Also, Take note that hypergrid supports <a href="https://polymerthemes.com/">polymer themes</a> and one can be selected from the top left menu.
            <br>
            <br>
          </div>
          <core-splitter direction="up"></core-splitter>
          <div flex class="rel">
            <fin-hypergrid class="abs" id="in-memory-example">
                <fin-hypergrid-behavior-in-memory></fin-hypergrid-behavior-in-memory>
                <fin-hypergrid-excel></fin-hypergrid-excel>
            </fin-hypergrid>
          </div>
        </div>

        <div vertical layout>
          <div class="description">
            <h3>fin-hypergrid-behavior-default</h3> This element is a custom Polymer web component that is the base class for the GridBehavior role in the design of the OpenFin hypergrid.  Not only does it accomodate the interface getValue(x,y) and setValue(x,y) of a traditional table model, it encapsulates the behavior that allows its implementation to determine what happens on various user events. This allows for external data analytics tools to do sorting, drilling down, aggregation etc.  With this example the getValue function is defined to simply return a string of the passed in x and y modulo 26 alpha character.  Notice the number of rows is set to a quadrillion.  Press Alt/Option to toggle the column picker.
            <br>
            <br>
          </div>
          <core-splitter direction="up"></core-splitter>
          <div flex class="rel">
            <fin-hypergrid class="abs">
                <fin-hypergrid-behavior-default></fin-hypergrid-behavior-default>
            </fin-hypergrid>
          </div>
        </div>

        <div vertical layout>
          <div class="description">
            <h3>fin-hypergrid-behavior-json</h3> This element is a custom Polymer web component that manages data sets within javascript.  You can sort on any column, with the sort being stable hence previous sorts are maintained.  The data is "pushed" into the behavior object with the call to setData at anytime after the polymer ready event is fired, see <a href="https://github.com/openfin/example-fin-hypergrid-behavior-json">(standalone json hypergrid project)</a> for an encapsulated version of this example.  <!-- Toggle the HiDPI button below to scale canvas to a higher pixel density with sharper rendering.  Keep in mind that the grid might exhibit a noticeable performance cost on chrome as there is an <a href="https://code.google.com/p/chromium/issues/detail?id=445372&q=drawImage&colspec=ID%20Pri%20M%20Week%20ReleaseBlock%20Cr%20Status%20Owner%20Summary%20OS%20Modified">outstanding bug</a> that is triggered in HiDPI mode because the double buffering image dimensions are much larger on some devices.
            <button id="hidpi-button" onClick="toggleHiDPI()">enable HiDPI</button> -->
            <br>
            <br>
          </div>
          <core-splitter direction="up"></core-splitter>
          <div flex class="rel">
            <fin-hypergrid class="abs" id="json-example">
                <fin-hypergrid-behavior-json></fin-hypergrid-behavior-json>
            </fin-hypergrid>
          </div>
        </div>
        <div vertical layout>
          <div class="description">
            <h3>fin-hypergrid-behavior-q</h3> This element is a custom Polymer web component that demonstrates a simple interface to Q/KDB+ by kx systems.  In order for this to work you need to run a hypergrid compatible Q program on your machine.  The provided example sorttable.q script is a true in memory million row table that allows you to sort on any column.  This hypergrid example can also be used with a rdbms of moderate size.  See the <a href="https://github.com/openfin/fin-hypergrid/tree/master/rdbms">rdbms</a> directory for instructions.
            <h3>To setup q for this demo</h3>
                <ol>
                    <li>Install <a href="http://kx.com/software-download.php">Q 32bit free version</a></li>
                    <li>download <a href="sorttable.q">sorttable.q</a> and place it into a directory somewhere(myqdir for this example)</li>
                    <li>make sure port 5000 is available</li>
                    <li>start sorttable.q at the command line<pre>~/myqdir>q sortable.q</pre></li>
                    <li>refresh your browser and reselect this tab</li>
                </ol>
            <h3>To point this example to your data</h3>
            load <a href="http://q/hypergrid-support.q">hypergrid-support.q</a> into your running q process and modify the url, table name, then press reconnect.
               <div width="100%">
                    <div class="centered">url:<input id="qurl" style="width:150px" value="ws://localhost:5000"></input>&nbsp;&nbsp;table:<input id="qtable" style="width:80px" value="trade"></input><button id="connectq" onClick="connectQ()">reconnect</button></div>
              </div>
              <br>
          </div>

          <core-splitter direction="up"></core-splitter>
          <div flex class="rel">
            <fin-hypergrid class="abs" id="q-example">
                <fin-hypergrid-behavior-q url="ws://localhost:5000" table="trade"></fin-hypergrid-behavior-q>
            </fin-hypergrid>
          </div>
        </div>

        <div vertical layout>
          <div class="description">
            <h3>fin-hypergrid-behavior-qtree</h3>This element is a custom Polymer web component that demonstrates a more complex interface to Q/KDB+ by kx systems. In order for this to work you need to git clone and run <a href="https://github.com/stevanapter/hypertree">Stevan Apter's hypertree server.</a> This Hypertree + Hypergrid example allows you to define an on-the-fly custom drill-down hierarchy while supporting interactive grouping, custom aggregation, and high-performance sorting in realtime. The current example demonstrates 20MM updates/second. The default aggregations available are sum, min, max, first, last, average, weighted average, and standard deviation. Press options/alt to drag-and-drop visible columns and the drill-down hierarchy.
            <br><br>
        </div>
          <core-splitter direction="up"></core-splitter>
          <div flex class="rel">
              <div class="abs" style="bottom:24px" id="qtreedescription">
              </div>
              <div class="abs" style="top:24px">
                <fin-hypergrid class="abs" id="qtree-example">
                    <fin-hypergrid-behavior-qtree url="ws://localhost:12345"></fin-hypergrid-behavior-qtree>
                </fin-hypergrid>
              </div>
          </div>
        </div>

        <div vertical layout>
          <div class="description">
            <h3>fin-hypergrid-behavior-gol</h3> This element is another custom Polymer web component grid behavior showing Conway's Game of Life.  The performance difference in the javascript execution environment between various browsers is very apparent with this example.  For the best performance try resizing your browser window to the grid x by y size (75 X 45)<br>
            <button id="play-button" onClick="toggleRunning()">play</button>
            <button onClick="clearGOLGrid()">reset</button>
            <br>
            <br>
          </div>
          <core-splitter direction="up"></core-splitter>
          <div flex class="rel">
            <fin-hypergrid class="abs">
                <fin-hypergrid-behavior-gol></fin-hypergrid-behavior-gol>
            </fin-hypergrid>
          </div>
        </div>

  </core-pages>


  </core-header-panel>

  <script>

  var updateThemes = function() {
    var renderers = Array.prototype.slice.call(document.querySelectorAll('fin-hypergrid'));
    //only need to tickle one as it's a global theme
    if (renderers.length > 0) {
        renderers[0].themeChangedNotification();
    }
  }

    function selectTheme(selection) {
        var themeName = selection.innerText || selection.textContent;
        themeName = themeName.trim();
        setTimeout(function(){
            document.location = document.location.href.split('?')[0]+'?theme=' + themeName;
        },50);
    };

    //some general setup
    (function(){

        document.addEventListener('polymer-ready', function() {

                var scope = document.querySelector('#themeDropDown');

                scope.themes = [
                  'excel',
                  'bloomberg',
                  'candy',
                  'classical',
                  'dark-side',
                  'denim',
                  'everest',
                  'gelati',
                  'golden-goose',
                  'ice',
                  'la-resistance',
                  'melon',
                  'seven-seas',
                  'sky',
                  'technology',
                  'the-times'
                ];
        });

    })();

    //lets initialize the tabs....
    (function() {
        var tabs = document.querySelector('paper-tabs');
        var pages = document.querySelector('core-pages');
        tabs.addEventListener('core-select', function() {
            pages.selected = tabs.selected;
        });
    })();

        // create and install a cell editor into the json example
        // the install code is inside a 'polymer-reader' callback below
        Polymer('fin-hypergrid-cell-editor-prompt', {
            alias: 'prompt',
            beginEditAt: function(point) {
                var grid = this.grid;
                var model = grid.getBehavior();
                initialValue = model._getValue(point.x, point.y);
                var proceed = grid.fireBeforeCellEdit(point, initialValue);
                if (!proceed) {
                    //we were cancelled
                    return;
                }
                var newValue = prompt('input', initialValue);
                if (newValue === null || newValue === initialValue) {
                    return; //data didn't change do nothing
                }

                model._setValue(point.x, point.y, newValue);
                grid.fireAfterCellEdit(point, initialValue, newValue);
            },
        });
        var el = document.createElement('div');
        el.innerHTML = '<polymer-element name="fin-hypergrid-cell-editor-prompt" ></polymer-element>';

    //override the cell provider for the q example
    (function() {
        document.addEventListener('polymer-ready', function() {

            //get ahold of our in memory example
            var inMemoryGrid = document.querySelector('#in-memory-example');

            //lets turn his scrollbars to always on....
            var lnfOverrides = {
                scrollbarHoverOver: 'visible',
                scrollbarHoverOff: 'visible',
                scrollingEnabled: true,
                //repaintIntervalRate: 0,
                //repaintImmediately: true
            };
            inMemoryGrid.addProperties(lnfOverrides);

            //get ahold of our q grid example
            var qGrid = document.querySelector('#q-example');
            var qTreeGrid = document.querySelector('#qtree-example');

            //get it's table model
            var qModel = qGrid.getBehavior();
            var qTreeModel = qTreeGrid.getBehavior();

            //get the cell cellProvider for altering cell renderers
            var cellProvider = qModel.getCellProvider();

            //there are 4 default cell renderer types to choose from at the moment
            //<br>simpleCellRenderer, sliderCellRenderer, sparkbarCellRenderer, sparklineCellRenderer
            var typeRendererMap = {
                J: 'sparklineCellRenderer',
                j: 'simpleCellRenderer',
                s: 'simpleCellRenderer',
                t: 'simpleCellRenderer',
                f: 'simpleCellRenderer',
                d: 'simpleCellRenderer'
            };

            // cellProvider.getCell = function(config) {
            //     var x = config.x;
            //     var renderer = cellProvider.cellCache[typeRendererMap[qModel.block.headers[x + 1][1]]];
            //     renderer = renderer || cellProvider.cellCache.simpleCellRenderer;
            //     if (x === 11) {
            //         renderer = cellProvider.cellCache.sliderCellRenderer;
            //     } else if (x === 13) {
            //         renderer = cellProvider.cellCache.sparkbarCellRenderer;
            //     }
            //     renderer.config = config;
            //     return renderer;
            // };
            var descriptionPanel = document.querySelector('#qtreedescription');
            var description = '';
            setInterval(function(){
                description = qTreeModel.getTreeStateDescription();
                descriptionPanel.innerHTML = description;
            }, 500);

        });

    })();

    //setup random data for the JSON tab example
    (function(){
        var seed = 1;
        var rnd = function() {
            var x = Math.sin(seed++)*10000;
            var r = x - Math.floor(x);
            return r;
        };

        var numRows = 100000;

        var firstNames = ['Olivia', 'Sophia', 'Ava', 'Isabella', 'Boy', 'Liam', 'Noah', 'Ethan', 'Mason', 'Logan', 'Moe', 'Larry', 'Curly', 'Shemp', 'Groucho', 'Harpo', 'Chico', 'Zeppo', 'Stanley', 'Hardy'];
        var lastNames = ['Wirts', 'Oneil', 'Smith', 'Barbarosa', 'Soprano', 'Gotti', 'Columbo', 'Luciano', 'Doerre', 'DePena'];
        var months = ['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12'];
        var days = ['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30'];
        var states = ['Alabama','Alaska','Arizona','Arkansas','California','Colorado','Connecticut','Delaware','Florida','Georgia','Hawaii','Idaho','Illinois','Indiana','Iowa','Kansas','Kentucky','Louisiana','Maine','Maryland','Massachusetts','Michigan','Minnesota','Mississippi','Missouri','Montana','Nebraska','Nevada','New Hampshire','New Jersey','New Mexico','New York','North Carolina','North Dakota','Ohio','Oklahoma','Oregon','Pennsylvania','Rhode Island','South Carolina','South Dakota','Tennessee','Texas','Utah','Vermont','Virginia','Washington','West Virginia','Wisconsin','Wyoming'];

        var randomFunc = Math.random;
        //var randomFunc = rnd;

        var randomPerson = function() {
            var firstName = Math.round((firstNames.length - 1) * randomFunc());
            //var lastName = 'a' + randomFunc() + 'b';
            var lastName = Math.round((lastNames.length - 1) * randomFunc());
            var pets = Math.round(10 * randomFunc());
            var birthyear = 1900 + Math.round(randomFunc() * 114);
            var birthmonth = Math.round(randomFunc() * 11);
            var birthday = Math.round(randomFunc() * 29);
            var birthstate = Math.round(randomFunc() * 49);
            var residencestate = Math.round(randomFunc() * 49);
            var travel = randomFunc() * 1000;
            var income = randomFunc() * 100000;
            var employed = Math.round(randomFunc());
            var person = {
                last_name: lastNames[lastName],
                first_name: firstNames[firstName],
                pets: pets,
                birthDate: birthyear + '-' + months[birthmonth] + '-' + days[birthday],
                birthState: states[birthstate],
                residenceState: states[residencestate],
                employed: employed === 1,
                income: income,
                travel: travel
            };
            person.squareOfIncome = function() {
                return Math.sqrt(this.income);
            }
            return person;
        };

       // alternate way to set fields and headers
       // var headers =
       //      [
       //          'Last Name',
       //          'First Name',
       //          'Pets',
       //          'Birth Date',
       //          'Birth State',
       //          'Residence State',
       //          'Employed',
       //          'Income',
       //          'Travel'
       //      ];

       //  var fields =
       //      [
       //          'last_name',
       //          'first_name',
       //          'pets',
       //          'birthDate',
       //          'birthState',
       //          'residenceState',
       //          'employed',
       //          'income',
       //          'travel'
       //      ];

        //lets make it available
        data = [];
        for (var i = 0; i < numRows; i ++) {
            data.push(randomPerson());
        }

        var editorTypes = ['choice','textfield','spinner','date','choice','choice','choice','textfield','textfield','prompt'];

        document.addEventListener('polymer-ready', function() {

            //get ahold of our json grid example
            var jsonGrid = document.querySelector('#json-example');

            //get it's table model
            var jsonModel = jsonGrid.getBehavior();

            //get the cell cellProvider for altering cell renderers
            var cellProvider = jsonModel.getCellProvider();

            //alternate way to set the header labels
            //jsonModel.setHeaders(headers);

            //alternate way to set the fields found on the row objects
            //jsonModel.setFields(fields);


            //yet another way to set the fields and headers
            // jsonModel.setColumns([
            //     {
            //         title: 'First Name',
            //         field: 'last_name',
            //     },
            //     {
            //         title: 'Last Name',
            //         field: 'first_name',
            //     },
            //     {
            //         title: 'Birth Date',
            //         field: 'birthDate',
            //     }
            // ]);

            //set the actual json row objects
            jsonModel.setData(data);

            //make the first col fixed;
            jsonModel.setFixedColumnCount(1);
            jsonModel.setFixedRowCount(2);


            //lets set 2 rows of totals
            var totals =
                [['','1st',251,'XXXX-XX-XX','1 of 50','1 of 50','T/F','$$$$$','£££££','computed col']];

            jsonModel.setTotals(totals);


            //sort ascending on the first column (first name)
            //jsonModel.toggleSort(0);

            //all formatting and rendering per cell can be overridden in here
            cellProvider.getCell = function(config) {
                var renderer = cellProvider.cellCache.simpleCellRenderer;
                config.halign = 'left';
                var x = config.x;
                var y = config.y;

                if ((y % 3) === 0){
                    config.bgColor = '#00ff00';
                    config.font = 'italic 15px Arial';
                } else if (((y - 1) % 3) === 0){
                    config.bgColor = '#0000ff';
                    config.fgColor = '#ffffff';
                }
                if (x === 1) {
                    renderer = cellProvider.cellCache.linkCellRenderer;
                } else if (x === 2) {
                    config.halign = 'center';
                } else if (x === 3) {
                    config.halign = 'center';
                } else if (x === 6) {
                    config.halign = 'center';
                } else if (x === 7) {
                    var travel = 60 + Math.round(config.value*150/100000);
                    var bcolor = travel.toString(16);
                    config.halign = 'right';
                    config.bgColor = '#00' + bcolor + '00';
                    config.fgColor = '#FFFFFF';
                    config.value = accounting.formatMoney(config.value);
                } else if (x === 8) {
                    var travel = 105 + Math.round(config.value*150/1000);
                    var bcolor = travel.toString(16);
                    config.halign = 'right';
                    config.bgColor = '#' + bcolor+ '0000';
                    config.fgColor = '#FFFFFF';
                    config.value = accounting.formatMoney(config.value, "€", 2, ".", ",");
                }

                renderer.config = config;
                return renderer;
            };

            //lets override the cell editors, and configure the drop down lists
            jsonModel.getCellEditorAt = function(x, y) {
                var type = editorTypes[x];
                var cellEditor = this.grid.cellEditors[type];
                if (x === 0) {
                    cellEditor.items = lastNames;
                } else if (x === 4 || x === 5) {
                    cellEditor.items = states;
                } else if (x === 6) {
                    cellEditor.items = [true, false];
                }
                return cellEditor;
            };

            jsonModel.getCursorAt = function(x,y) {
                if (x === 1) {
                    return 'pointer'
                } else {
                    return null;
                }
            };

            jsonGrid.addFinEventListener('fin-double-click', function(e){
                var cell = e.detail.gridCell;
                if (cell.x < 8) {
                    return; // lets only see console output on the final column
                }
                alert('fin-double-click at (' + cell.x + ', ' + cell.y + ')');
            });

            jsonGrid.addFinEventListener('fin-click', function(e){
                var cell = e.detail.gridCell;
                if (cell.x !== 7) {
                    return; // lets only see console output on the final column
                }
                alert('fin-click at (' + cell.x + ', ' + cell.y + ')');
            });

            jsonGrid.addFinEventListener('fin-header-click', function(e){
                var cell = e.detail.gridCell;
                if (cell.x !== 7) {
                    return; // lets only see console output on the final column
                }
                alert('fin-click at (' + cell.x + ', ' + cell.y + ')');
            });

            jsonGrid.addFinEventListener('fin-scroll-x', function(e){
                console.log('fin-scroll-x ', e.detail.value);
            });
            jsonGrid.addFinEventListener('fin-scroll-y', function(e){
                console.log('fin-scroll-y', e.detail.value);
            });
            jsonGrid.addProperties({
                readOnly: false
            });
            // lets setup a cell update
            // var g = document.querySelector('#json-example');
            // var model = g.getBehavior();row = model.data[0];
            // setInterval(function() { row.pets = Date.now()}, 100);
            // setInterval(function() { g.repaintCell(2,0); }, 110);
            var tabs = document.getElementsByTagName('paper-tabs')[0];
            var tab = getParameterByName("tab");
            if (tab) {
                tabs.setAttribute('selected', tab);
            }
            var qTree = document.querySelector('#qtree-example');
            // qTree.addEventListener('fin-grid-rendered', function(e) {
            //   console.dir(qTree.getRenderedData());
            // });
            qTree.addFinEventListener('fin-selection-changed', function(e) {
                //console.log('fin-selection-changed', qTree.getSelectedRow());
            });

            jsonGrid.addFinEventListener('fin-before-cell-edit', function(e) {
                console.log('fin-before-cell-edit', e);
            });

            jsonGrid.addFinEventListener('fin-after-cell-edit', function(e) {
                console.log('fin-after-cell-edit', e);
            });

            jsonGrid.addFinEventListener('fin-cell-enter', function(e) {
                var cell = e.detail.gridCell;
                console.log('fin-cell-enter', cell.x, cell.y);
            });

            jsonGrid.addFinEventListener('fin-keydown', function(e) {
                console.log('fin-keydown', e);
            });

            // // initialize our custom cell renderer
            jsonGrid.initializeCellEditor('fin-hypergrid-cell-editor-prompt');

            if (!window.fin) {
                if (this.logging) {
                    console.log('could not launch q because we are not running inside the OpenFin container');
                }
                return;
            } else {
              fin.desktop.main(function() {

                  var qTreeGrid = document.querySelector('#qtree-example');

                  //get it's table model
                  var qTreeModel = qTreeGrid.getBehavior();

                  fin.desktop.System.launchExternalProcess({
                  alias: 'qhypertree',
                  target: 'starthypertree.cmd',
                  arguments: '',
                  listener: function(event){
                      console.log(event);
                   }
                });
                  setTimeout(function(){
                    qTreeModel.reconnect();
                  }, 2000);
              });
            }

        });
    })();
    //json-example stuff
    function toggleHiDPI() {
        var button = document.querySelector('#hidpi-button');
        var jsonGrid = document.querySelector('#json-example');
        jsonGrid.toggleHiDPI();
        if (jsonGrid.isHiDPI()) {
            button.innerText = 'disable HiDPI';
        } else {
            button.innerText = 'enable HiDPI';
        }
    }
    //q of life stuff
    function connectQ() {
        var q = document.querySelector('fin-hypergrid-behavior-q');
        var url = document.querySelector('#qurl').value;
        var table = document.querySelector('#qtable').value;
        //set it blank first to tickle the change event if its
        //the same value
        q.setAttribute('table', table);

        q.setAttribute('url', '');
        q.setAttribute('url', url);
    }
    function toggleRunning() {
        var button = document.querySelector('#play-button');
        var gol = document.querySelector('fin-hypergrid-behavior-gol');
        gol.toggleRunning();
        var description = gol.getNextState();
        button.innerText = description;
    }

    //game of life stuff
    function clearGOLGrid() {
        var gol = document.querySelector('fin-hypergrid-behavior-gol');
        gol.resetPetriDish();
    }
    function toggleRunning() {
        var button = document.querySelector('#play-button');
        var gol = document.querySelector('fin-hypergrid-behavior-gol');
        gol.toggleRunning();
        var description = gol.getNextState();
        button.innerText = description;
    }

    function dumpTheme() {
        var pb = document.createElement('paper-button');
        pb.style.display = 'none';
        pb.setAttribute('disabled', true);
        document.body.appendChild(pb);

        var section = document.createElement('section');
        section.style.display = 'none';
        section.setAttribute('hero', true);
        document.body.appendChild(section);

        var p = window.getComputedStyle(pb);
        var h = window.getComputedStyle(document.querySelector('html'));
        var d = (h.flex || '0 0 0').split(' ');
        var s = window.getComputedStyle(section);
        console.log('fixed', p['background-color']);
        console.log('lineColor', p['color']);
        console.log('color', h['color']);
        console.log('font-family', h['font-family']);
        console.log('backgroundColor', s['background-color']);

        pb.setAttribute('disabled', false);
        pb.setAttribute('secondary', true);
        pb.setAttribute('raised', true);

        console.log('backgroundSelColor', p['background-color']);


        pb.setAttribute('secondary', false);
        pb.setAttribute('info', true);

        console.log('fixedRowFGSelColor', p['color']);
        console.log('fixedRowBGSelColor', p['background-color']);

        document.body.removeChild(pb);
        document.body.removeChild(section);
    }
    var observer = new MutationObserver(function(mutations) {
        mutations.forEach(function(mutation) {
        console.log(mutation.type);
    });
    var target = document.querySelector('html');
    observer.observe(target, { attributes: true, childList: true, characterData: true });
});
  </script>

</body>
</html>