maptalks - 改变图层叠加顺序

改变图层叠加顺序

index.html

<!DOCTYPE html>
<html>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>图层 - 改变图层叠加顺序</title>
  <style type="text/css">
    html,body{margin:0px;height:100%;width:100%}
    .container{width:100%;height:100%}
    .pane{background:#34495e;line-height:28px;color:#fff;z-index:10;position:absolute;top:20px;right:20px}
    .pane a{display:block;color:#fff;text-align:left;padding:0 10px;min-width:28px;min-height:28px;float:left}
  </style>
  <link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
  <script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>
  <body>

    <div id="map" class="container"></div>
    <div class="pane"><a href="javascript:sort1();">Sort to 3,2,1</a><a href="javascript:sort2();">Sort to 1,2,3</a></div>

    <script>
      var map = new maptalks.Map('map', {
        center: [-0.113049,51.498568],
        zoom: 14,
        baseLayer: new maptalks.TileLayer('base', {
          urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
          subdomains: ['a','b','c','d'],
          attribution: '&copy; <a href="http://osm.org">OpenStreetMap</a> contributors, &copy; <a href="https://carto.com/">CARTO</a>'
        })
      });

      // sort to 3,2,1
      function sort1() {
        map.sortLayers(['1', '2', '3']);
      }

      // sort to 1,2,3
      function sort2() {
        map.sortLayers(['3', '2', '1']);
      }

      var rect3 = new maptalks.Rectangle(
        map.getCenter().sub(0.025, 0.0035),
        1600,
        1000,
        {
          'symbol': [
            {
              'lineColor': '#34495e',
              'lineWidth': 3,
              'polygonFill': '#1bbc9b',
              'polygonOpacity' : 1
            },
            {
              'textName' : 'Layer 3',
              'textWeight' : 'bold',
              'textSize' : 30,
              'textFill' : '#fff'
            }
          ]
        }
      );

      var rect2 = rect3.copy()
        .translate([0.006, 0.006])
        .updateSymbol([{ 'polygonFill' : 'rgb(216,115,149)' }, { 'textName' : 'Layer 2' }]);

      var rect1 = rect2.copy()
        .translate([0.006, 0.006])
        .updateSymbol([{ 'polygonFill' : 'rgb(135,196,240)' }, { 'textName' : 'Layer 1' }]);

      map.addLayer([
        new maptalks.VectorLayer('3', [rect3]),
        new maptalks.VectorLayer('2', [rect2]),
        new maptalks.VectorLayer('1', [rect1])
      ]);

    </script>
  </body>
</html>

var map = new maptalks.Map('map', {
  center: [-0.113049, 51.498568],
  zoom: 14,
  baseLayer: new maptalks.TileLayer('base', {
    urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
    subdomains: ['a', 'b', 'c', 'd'],
    attribution: '© <a href="http://osm.org">OpenStreetMap</a>  contributors, © <a href="https://carto.com/">CARTO</a> '
  })
});

// sort to 3,2,1

function sort1() {
  map.sortLayers(['1', '2', '3']);
}

// sort to 1,2,3

function sort2() {
  map.sortLayers(['3', '2', '1']);
}

var rect3 = new maptalks.Rectangle(
  map.getCenter().sub(0.025, 0.0035),
  1600,
  1000, {
    'symbol': [{
      'lineColor': '#34495e',
      'lineWidth': 3,
      'polygonFill': '#1bbc9b',
      'polygonOpacity': 1
    }, {
      'textName': 'Layer 3',
      'textWeight': 'bold',
      'textSize': 30,
      'textFill': '#fff'
    }]
  }
);

var rect2 = rect3.copy()
  .translate([0.006, 0.006])
  .updateSymbol([{
    'polygonFill': 'rgb(216,115,149)'
  }, {
    'textName': 'Layer 2'
  }]);

var rect1 = rect2.copy()
  .translate([0.006, 0.006])
  .updateSymbol([{
    'polygonFill': 'rgb(135,196,240)'
  }, {
    'textName': 'Layer 1'
  }]);

map.addLayer([
  new maptalks.VectorLayer('3', [rect3]),
  new maptalks.VectorLayer('2', [rect2]),
  new maptalks.VectorLayer('1', [rect1])
]);