在Google地图上显示/隐藏圆圈javascript API

Question

当用户将鼠标悬停在Google Maps圆上时将其显示，当鼠标悬停时将其隐藏。 此代码可在鼠标移出时隐藏圆圈，但在鼠标悬停时不会重新显示圆圈。 我也尝试了circle.setMap（null）然后是circle.setMap（map），这就是我将地图作为参数传递给showHide函数的原因。

var buildings = {};
buildings['Tinsley'] = {
    center: new google.maps.LatLng(30.512028, -90.466363),
    radius: 20,
    description: "<div>Tinsley Hall</div>",
    desMaxWidth: 500,
};
buildings['Pottle'] = {
    center: new google.maps.LatLng(30.513184, -90.467562),
    radius: 40,
    description: "<div>Pottle Hall</div>",
    desMaxWidth: 500,
};
function initialize() {
  var southeastern = new google.maps.LatLng(30.5153382,-90.4676681);
  var mapOptions = {
    zoom: 17,
    center: southeastern
  }

  var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

  var ctaLayer = new google.maps.KmlLayer({
    url: 'http://www.southeastern.edu/_new-resources/includes/slu.kml'
  });
  ctaLayer.setMap(null);

  var counter = 0;
  for (var building in buildings) {
    var buildingCircle = {
      strokeColor: 'darkgreen',
      strokeOpacity: 0.3,
      strokeWeight: 3,
      clickable: true,
      fillColor: 'gold',
      fillOpacity: 0.35,
      map: map,
      visible: true,
      center: buildings[building].center,
      radius: buildings[building].radius,
    };
    markerCircle = new google.maps.Circle(buildingCircle);
    attachInfoWindow(map, markerCircle, buildings[building].description);
    showHideCircle(map, markerCircle);
    counter++
  }
}

function attachInfoWindow(map, circle, info){
  var infowindow = new google.maps.InfoWindow({
    content: info
  });  
  google.maps.event.addListener(circle, 'click', function(ev) {
    infowindow.setPosition(circle.getCenter());
    infowindow.open(map);
  });
}

function showHideCircle(map, circle){
  google.maps.event.addListener(circle, 'mouseover', function(){
    circle.setVisible(true);
  });
  google.maps.event.addListener(circle, 'mouseout', function(){
    circle.setVisible(false);
  });
}

google.maps.event.addDomListener(window, 'load', initialize);

Answer 1

如果要使用鼠标悬停/鼠标移出，则不能使用“可见”或从地图上删除圆圈。 将fillOpacity和stokeOpacity设置为0以隐藏圆。

function showHideCircle(map, circle) {
    google.maps.event.addListener(circle, 'mouseout', function () {
        circle.setOptions({fillOpacity:0, strokeOpacity:0});
    });
    google.maps.event.addListener(circle, 'mouseover', function () {
        circle.setOptions({fillOpacity: 0.35, strokeOpacity:0.3});
    });
}

工作小提琴

代码段：

 var buildings = {}; buildings['Tinsley'] = { center: new google.maps.LatLng(30.512028, -90.466363), radius: 20, description: "<div>Tinsley Hall</div>", desMaxWidth: 500, }; buildings['Pottle'] = { center: new google.maps.LatLng(30.513184, -90.467562), radius: 40, description: "<div>Pottle Hall</div>", desMaxWidth: 500, }; function initialize() { var southeastern = new google.maps.LatLng(30.5153382, -90.4676681); var mapOptions = { zoom: 17, center: southeastern } var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions); var ctaLayer = new google.maps.KmlLayer({ url: 'http://www.southeastern.edu/_new-resources/includes/slu.kml' }); ctaLayer.setMap(null); var counter = 0; for (var building in buildings) { var buildingCircle = { strokeColor: 'darkgreen', strokeOpacity: 0.3, strokeWeight: 3, clickable: true, fillColor: 'gold', fillOpacity: 0.35, map: map, visible: true, center: buildings[building].center, radius: buildings[building].radius, }; markerCircle = new google.maps.Circle(buildingCircle); attachInfoWindow(map, markerCircle, buildings[building].description); showHideCircle(map, markerCircle); counter++ } } function attachInfoWindow(map, circle, info) { var infowindow = new google.maps.InfoWindow({ content: info }); google.maps.event.addListener(circle, 'click', function(ev) { infowindow.setPosition(circle.getCenter()); infowindow.open(map); }); } function showHideCircle(map, circle) { google.maps.event.addListener(circle, 'mouseout', function() { circle.setOptions({ fillOpacity: 0, strokeOpacity: 0 }); }); google.maps.event.addListener(circle, 'mouseover', function() { circle.setOptions({ fillOpacity: 0.35, strokeOpacity: 0.3 }); }); } google.maps.event.addDomListener(window, 'load', initialize); 

 html, body, #map-canvas { height: 100%; width: 100%; margin: 0px; padding: 0px } 

 <script src="https://maps.googleapis.com/maps/api/js"></script> <div id="map-canvas" style="border: 2px solid #3872ac;"></div>