Click Select

<!--
  示例：点击选中
  要点：onClick 取 info.object 与 info.index，单独用一层描边标出选中柱体
  依赖：deck.gl 9.0 · jsDelivr CDN
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta name="robots" content="noindex,follow">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>点击选中</title>
<style>
  html,body{height:100%;margin:0;background:#0d1117}
  body{display:flex;flex-direction:column;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif;color:#e6e8ec}
  .bar{position:relative;z-index:5;flex:0 0 auto;padding:8px 12px;background:#161b22;border-bottom:1px solid #252c36;
       display:flex;gap:14px;align-items:center;font-size:12px;color:#8b93a1;flex-wrap:wrap}
  .bar b{color:#58a6ff;font-weight:600}
  .bar label{display:flex;align-items:center;gap:5px;cursor:pointer}
  .bar input[type=checkbox]{accent-color:#4f9ef8}
  .bar input[type=range]{width:150px;accent-color:#4f9ef8}
  .bar button{font:inherit;font-size:12px;padding:3px 10px;border-radius:4px;cursor:pointer;
       border:1px solid #2f3947;background:#1d242e;color:#c9d3e0}
  .bar button:hover{background:#26303d}
  #cv{flex:1 1 auto;min-height:0;width:100%;display:block}

</style>
</head>
<body>
<div class="bar"><span>柱体 <b id="n">—</b></span><span>点击选中 · 点击空白取消</span><span>选中 <b id="sel">—</b></span></div>
<canvas id="cv"></canvas>
<script src="https://cdn.jsdelivr.net/npm/deck.gl@9.0.35/dist.min.js"></script>
<script>
(function () {
  'use strict';

  if (typeof deck === 'undefined') {
    document.body.innerHTML =
      '<div style="padding:24px;color:#ff8c74">deck.gl 加载失败，请检查能否访问 cdn.jsdelivr.net</div>';
    return;
  }
  var cols = [];
  for (var x = 0; x < 12; x++) {
    for (var y = 0; y < 9; y++) {
      cols.push({
        lng: 116.31 + x * 0.019,
        lat: 39.84 + y * 0.016,
        v: Math.random(),
        name: '格 ' + x + '-' + y
      });
    }
  }

  document.getElementById('n').textContent = cols.length;

  var selected = null;

  function selectLayer() {
    var rows = selected ? [selected] : [];
    return [
      new deck.ColumnLayer({
        id: 'selected-col',
        data: rows,
        diskResolution: 10,
        radius: 260,
        getPosition: function (d) { return [d.lng, d.lat]; },
        getElevation: function (d) { return d.v * 1200 + 4; },
        getFillColor: [255, 236, 190, 205],
        pickable: false
      }),
      new deck.ScatterplotLayer({
        id: 'selected-ring',
        data: rows,
        getPosition: function (d) { return [d.lng, d.lat]; },
        getRadius: 20,
        radiusUnits: 'pixels',
        filled: false,
        stroked: true,
        getLineColor: [255, 210, 120, 255],
        getLineWidth: 2,
        lineWidthUnits: 'pixels',
        pickable: false
      })
    ];
  }

  var base = new deck.ColumnLayer({
    id: 'cols',
    data: cols,
    diskResolution: 10,
    radius: 240,
    getPosition: function (d) { return [d.lng, d.lat]; },
    getElevation: function (d) { return d.v * 1200; },
    getFillColor: function (d) { return [80, Math.round(180 - 60 * d.v), 230, 215]; },
    pickable: true
  });

  var deckgl = new deck.Deck({
    canvas: 'cv',
    width: '100%',
    height: '100%',
    initialViewState: { longitude: 116.42, latitude: 39.89, zoom: 10.4, pitch: 48, bearing: -18 },
    controller: true,
    layers: [base].concat(selectLayer()),
    onClick: function (info) {
      selected = info.object && info.object.name ? info.object : null;
      document.getElementById('sel').textContent = selected ? selected.name : '—';
      deckgl.setProps({ layers: [base].concat(selectLayer()) });
    }
  });
  window.__deck = deckgl;
})();
</script>
</body>
</html>