Parliament (item) chart

author(s): Torstein Hønsi

by owen_pengtao

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/item-series.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>

<figure class="highcharts-figure">
    <div id="container"></div>
    <p class="highcharts-description">
        Chart showing representatives in the German Parliament. The chart is
        using the <code>item</code> series type with a semi circle layout.
        Item charts create a number of items corresponding to the value of
        each data point.
    </p>
</figure>

CSS

.highcharts-figure,
.highcharts-data-table table {
    min-width: 320px;
    max-width: 800px;
    margin: 1em auto;
}

.highcharts-data-table table {
    font-family: Verdana, sans-serif;
    border-collapse: collapse;
    border: 1px solid #ebebeb;
    margin: 10px auto;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.highcharts-data-table caption {
    padding: 1em 0;
    font-size: 1.2em;
    color: #555;
}

.highcharts-data-table th {
    font-weight: 600;
    padding: 0.5em;
}

.highcharts-data-table td,
.highcharts-data-table th,
.highcharts-data-table caption {
    padding: 0.5em;
}

.highcharts-data-table thead tr,
.highcharts-data-table tr:nth-child(even) {
    background: #f8f8f8;
}

.highcharts-data-table tr:hover {
    background: #f1f7ff;
}

input[type="number"] {
    min-width: 50px;
}

JavaScript

Highcharts.chart('container', {

  title: {
    text: 'Distribution of seats'
  },

  subtitle: {
    text: 'Bundestag election 2021. Source: ' +
      '<a href="https://www.bundeswahlleiter.de/en/bundeswahlleiter.html"' +
      'target="_blank">Bundeswahlleiter</a> '
  },

  legend: {
    labelFormat: '{name} <span style="opacity: 0.4">{y}</span>'
  },

  series: [{
    type: 'item',
    name: 'Representatives',
    keys: ['name', 'y', 'color', 'label'],
    data: [
      ['The Left', 3, '#CC0099', 'DIE LINKE'],
      ['Social Democratic Party', 4, '#EE0011', 'SPD'],
      ['Alliance 90/The Greens', 5, '#448833', 'GRÜNE'],
    ],
    layout: "horizontal",
    marker: {
      symbol: "square"
    },
    events: {
      legendItemClick: function() {
        var clickedSeriesName = this.name; // 使用系列的名字作为标识符
        var totalItemsToShow = 0;

        // 遍历所有系列
        this.chart.series.forEach(function(series) {
          series.data.forEach(function(point) {
          	console.log(point);
          });
        });

        console.log("将要显示的项目总数:", totalItemsToShow);
      }
    }
  }],
});