双击时如何创建突出显示图像？

Question

我试图在用户双击图像的特定部分时显示突出显示的圆圈。例如，如果图像是城市地图，他们双击坐标：(X, Y)，我希望突出显示的圆的中心位于 (X, Y) 并且半径会因他们所选择的项目而异点击了。

这是我目前的情况：

<script type="text/javascript"
      src="https://maps.googleapis.com/maps/api/js?sensor=false">
   </script>         
<script type="text/javascript"> 
 function showMap(){        
        var mapOptions = {
                     zoom: 19,
                     center: new google.maps.LatLng(x, y),//let z, y be some coord
                     mapTypeId: google.maps.MapTypeId.ROADMAP,
                     disableDoubleClickZoom: true,
                     disableDefaultUI: true,
                     zoomControl: false,
                     draggable: false, 
                     scrollwheel: false
                }
        map = new google.maps.Map(document.getElementById("myMap"), 
                        mapOptions);

        google.maps.event.addListener(map, 'dblclick', doubleClicked);
    }

    function doubleClicked(e){//highlight the area with a circle                
                //alert("lat: " + e.latLng.lat() + "\nlong: " + e.latLng.lng());
    }        
 </script>

HTML

<div id="myMap" ></div>

CSS

#myMap {
    margin-left: auto;
    margin-right: auto;
    width: 1200px;
    height: 800px
}

@Aamir Sarwar 帮助下的解决方案：

var circle = new google.maps.Circle({
                strokeColor: '#FFFFFF',
                strokeOpacity: 0.8,
                strokeWeight: 2,
                fillColor: '#FF0000',
                fillOpacity: 0.35,
                map: map,
                center: {lat: X, lng: Y}
                radius: 10
            });

Answer 1

查看下面的示例副本 link...希望它可以帮助您 https://developers.google.com/maps/documentation/javascript/examples/rectangle-simple?hl=en

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Rectangles</title>
    <style>
      html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #map {
        height: 100%;
      }
    </style>
    <script>

// This example adds a red rectangle to a map.

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 11,
    center: {lat: 33.678, lng: -116.243},
    mapTypeId: google.maps.MapTypeId.TERRAIN
  });

  var rectangle = new google.maps.Rectangle({
    strokeColor: '#FF0000',
    strokeOpacity: 0.8,
    strokeWeight: 2,
    fillColor: '#FF0000',
    fillOpacity: 0.35,
    map: map,
    bounds: {
      north: 33.685,
      south: 33.671,
      east: -116.234,
      west: -116.251
    }
  });
}

    </script>
  </head>
  <body>
    <div id="map"></div>
    <script async defer
        src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&signed_in=true&callback=initMap"></script>
  </body>
</html>

Answer 2

这里是大纲：

myMap 应该是 position:relative
在myMap上添加鼠标事件以跟踪鼠标位置的X,Y
在 doubleClicked 方法中，创建将显示为圆圈的 div。也应该是 position:absolute
将该元素添加到 myMap 并更改其 CSS：左侧为鼠标 X 位置，顶部为鼠标 Y 位置

双击时如何创建突出显示图像？

How to create a highlight an image when double clicked?

javascript

jquery

css

google-maps

highlight