鼠标工具-拉框缩放

使用MouseTool可实现放大/缩小选中地图区域效果，用于区域缩放等场景。

源代码编辑器

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="chrome=1">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" type="text/css">
    <style>
      html,body,#container{
        height: 100%
      }
      .btn{
        width: 6rem;
        margin: 0 1rem 0 4.5rem;
      }
    </style>
    <title>鼠标工具-拉框缩放</title>
  </head>
  <body>
    <div id='container'></div>
    <div class='info'>操作说明：在地图上拖拽</div>
    <div class="input-card" style='width: 18rem;'>
        <div class="input-item">
          <input type="radio" name='func' checked="" value='zoomIn'><span class="input-text">拉框放大</span>
          <input type="radio" name='func' value='zoomOut'><span class="input-text">拉框缩小</span>
        </div>
        <div class="input-item">
          <input id="close" type="button" class="btn" value="关闭" />
        </div>
    </div>
    <script src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值&plugin=AMap.MouseTool"></script>
    <script type="text/javascript">
    var map = new AMap.Map('container',{
        zoom:3
    });

    var mouseTool = new AMap.MouseTool(map); 

    function draw(type){
      switch(type){
        case 'zoomIn':{
            mouseTool.rectZoomIn({
                strokeColor:'#80d8ff',
                fillColor:'#80d8ff',
                fillOpacity:0.3
                //同 Polygon 的 Option 设置
              
            });
            break;
        }
        case 'zoomOut':{
            mouseTool.rectZoomOut({
                strokeColor:'#80d8ff',
                fillColor:'#80d8ff',
                fillOpacity:0.3
              //同 Polygon 的 Option 设置
            });
            break;
        }
      }
    }
    var radios = document.getElementsByName('func');
    for(var i=0;i<radios.length;i+=1){
        radios[i].onchange = function(e){
          draw(e.target.value)
        }
    }
    draw('zoomIn')

    document.getElementById('close').onclick = function(){
        mouseTool.close(true)//关闭，并清除覆盖物
        for(var i=0;i<radios.length;i+=1){
            radios[i].checked = false;
        }
    }
    </script>
  </body>
</html>

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