<template>
  <div>
    <div class="wrap">
      <h1>41,000 saplings, one dot per 50</h1>
      <p>
        A lobed canopy over a flared trunk, packed with dots. The outline is two
        overlapping subpaths, which the layout unions before it packs, so a
        canopy with nine bumps and a trunk with roots is one shape rather than a
        circle balanced on a rectangle.
      </p>

      <div class="chart-wrap">
        <div id="chart">
          <apexchart
            type="unit"
            height="470"
            :options="chartOptions"
            :series="series"
          ></apexchart>
        </div>
      </div>

      <p class="note">1 dot = 50 saplings planted this season</p>
    </div>
  </div>
</template>

<script>
import VueApexCharts from 'vue-apexcharts'

// This demo also loads: https://cdn.jsdelivr.net/npm/apexcharts/dist/unit-shapes.js

export default {
  components: {
    apexchart: VueApexCharts,
  },
  data: function () {
    return {
      series: [28800, 8400, 2100, 1700],
      chartOptions: {
        chart: {
          type: 'unit',
          height: 470,
          animations: {
            enabled: true,
            speed: 900,
          },
        },
        labels: ['Oak', 'Silver birch', 'Rowan', 'Wild cherry'],
        // Green where the canopy is dense, then earth tones for the smaller species:
        // four greens would be a single unreadable mass at this dot size, while green
        // plus ochre plus bark keeps the tree looking like a tree.
        colors: ['#2E7D32', '#7CB342', '#C9A227', '#8D6E63'],
        plotOptions: {
          unit: {
            layout: 'custom',
            // One of the shapes in apexcharts/unit-shapes.
            positions: 'tree',
            transition: 'flow',
            unitValue: 50,
            clusterLabels: {
              external: {
                show: true,
              },
            },
          },
        },
        legend: {
          show: false,
        },
      },
    }
  },
}
</script>

<style>
body {
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #fafbfc;
  color: #2c3e50;
  margin: 0;
  padding: 32px 16px;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
}
h1 {
  font-size: 22px;
  margin: 0 0 8px;
}
p {
  color: #5b6b78;
  line-height: 1.5;
  margin: 0 0 24px;
}
.chart-wrap {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}
.note {
  color: #8592a0;
  font-size: 12px;
  text-align: center;
  margin: 16px 0 0;
}
</style>