聚合物点叠加点击

时间:2016-10-24 20:07:38

标签: javascript google-maps polymer

按照本指南,我可以正确运行项目,现在我想为绘制的点添加一个事件。所以这是我的代码:

<!doctype html>

<html>
<head>
  <title>PolymerVizCodelab</title>

  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
  <meta name="mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-capable" content="yes">

  <script src="bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>

  <link rel="import" href="bower_components/google-map/google-map.html">
  <link rel="import" href="bower_components/point-overlay/point-overlay.html">
  <link rel="import" href="bower_components/paper-card/paper-card.html">
  <link rel="import" href="bower_components/paper-slider/paper-slider.html">
  <link rel="import" href="bower_components/iron-ajax/iron-ajax.html">

  <link rel="stylesheet" href="styles.css">
</head>

<body unresolved>
  <template is="dom-bind" id="t">
    <google-map map="{{map}}" latitude="38.6" longitude="-95.8" zoom="5"
      styles='[{"stylers":[{"saturation":-85}]},{"featureType":"water","stylers":[{"lightness":-20}]}]'
      on-google-map-ready="setPointSize"
      on-zoom-changed="setPointSize">
    </google-map>
    <point-overlay on-click="clickHandler" map="[[map]]" uniforms="{{uniforms}}" data="{{data}}" id="p">
    </point-overlay>
    <iron-ajax auto handle-as="json"
      url="bower_components/point-overlay/tornadoes-1950-2014.json"
      last-response="{{data}}">
    </iron-ajax>

    <!-- <paper-card elevation="2">
      <paper-slider min="5" max="100" value="30"></paper-slider>
    </paper-card> -->
  </template>

  <script>
    var t = document.querySelector('#t');
    t.setPointSize = function(e) {
      this.uniforms.pointSize = Math.exp(0.3 * this.map.getZoom());
      this.notifyPath('uniforms.pointSize', this.uniforms.pointSize);
    };
    function clickHandler(e) {
      console.log("click");
    }
  </script>
</body>
</html>

clickHandler永远不会被解雇。

如何为地图上的每个点绑定和事件?

2 个答案:

答案 0 :(得分:1)

clickHandler需要成为dom-bind模板的一部分(就像您使用setPointSize一样)。改变这个:

function clickHandler(e) {
  console.log("click");
}

到此:

t.clickHandler = function(e) {
  console.log("click");
};

答案 1 :(得分:1)

不幸的是,point-overlay不会公开任何事件,此外point-overlay地图图层可供canvas-layer.js用于在Google地图上显示数据,以防止鼠标事件触发事件监听器。

但是,对CanvasLayer进行了一些修改后,它可以完成,如下所示:

CanvasLayer档案中:

1)注释阻止鼠标事件触发覆盖元素(canvas.style.pointerEvents = 'none'; )中的事件侦听器的行:

point-overlay

修改point-overlay.html元素(overlayMouseTarget文件)

2)将地图窗格设置为this.overlay.setPaneName("overlayMouseTarget");

click

3)为canvas元素引入var me = this; google.maps.event.addDomListener(this.overlay.canvas, 'click', function() { me.fire('overlay-click'); }); 事件处理程序:

index.html

最后在clickHandler档案中:

4)注册<point-overlay on-overlay-click="clickHandler" map="[[map]]" uniforms="{{uniforms}}" data="{{data}}" id="p"> </point-overlay> 事件处理程序

var t = document.querySelector('#t');
t.clickHandler = function(e) {
   console.log('clicked');
};

,其中

{{1}}

polymer-webgl-visualization component