Google Maps v3 处理点击 InfoWindow 内的元素

Question

简而言之，我试图完成的事情：

• 地图上只有一个信息窗口，因为标记很多
• 附加到标记的 InfoWindow 内容
• InfoWindow 在标记单击时打开 => 附加属性中的内容
• InfoWindow 包含 2 个按钮 => 设置 start，设置 target
• 如果设置了start和target，计算路线

我尝试了很多，但很难将处理程序附加到 InfoWindow 内的按钮。我发现的最好的提示是这个：Adding event to element inside Google Maps API InfoWindow

到目前为止我已经试过了：

<script>
function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(50.903033, 11.359863),
        zoom: 6,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        disableDefaultUI: true,
        zoomControl: true,
        scaleControl: true,
        overviewMapControl: true
    };
    var map = new google.maps.Map(document.getElementById('limousine-map'),
        mapOptions);
    var directionsService = new google.maps.DirectionsService();
    var directionDisplay = new google.maps.DirectionsRenderer();
    directionDisplay.setMap(map);
    directionDisplay.setPanel(document.getElementById('route-details'));
    var infoWindow = new google.maps.InfoWindow();
    var endPoint = false;
    var startPoint = false;


var marker = new google.maps.Marker({
    map: map,
    position: new google.maps.LatLng(50.903033, 11.359863),
    title: 'Test1'
});
marker.infoWindowContent = [
    '<div id="infoWindow"><strong>Test</strong>',
    '<button class="button" id="selectStart">Start</button>'+
    '<button class="button" id="selectTarget" style="float: right;">Target</button></div>'
].join('<br>');

google.maps.event.addListener(marker,'click',function(){
    infoWindow.close();
    infoWindow = new google.maps.InfoWindow({
        content: this.infoWindowContent
    });
    infoWindow.open(map,this);
    clickedLocation = this;
    google.maps.event.addListener(infoWindow, 'domready', function() {
        $('#infoWindow button').on('click',function(){
            console.log(clickedLocation);
            if($(this).attr('id') == 'selectStart'){
                startPoint = clickedLocation;
            }
            if($(this).attr('id') == 'selectTarget'){
                endPoint = clickedLocation;
            }
            recalcRoute();
        });
    });
});

var marker2 = new google.maps.Marker({
    map: map,
    position: new google.maps.LatLng(52.903033, 12.359863),
    title: 'Test2'
});
marker2.infoWindowContent = [
    '<div id="infoWindow"><strong>Test2</strong>',
    '<button class="button" id="selectStart">Start</button>'+
            '<button class="button" id="selectTarget" style="float: right;">Target</button></div>'
].join('<br>');

google.maps.event.addListener(marker2,'click',function(){
    infoWindow.close();
    infoWindow = new google.maps.InfoWindow({
        content: this.infoWindowContent
    });
    infoWindow.open(map,this);
    clickedLocation = this;
});



//Route painting
function recalcRoute(){
    if(startPoint != false && endPoint != false){
        var request = {
            origin: startPoint,
            destination: endPoint,
            travelMode: google.maps.TravelMode.DRIVING,
            unitSystem: google.maps.UnitSystem.METRIC
        };
        directionsService.route(request, function(response, status){
            if(status == google.maps.DirectionsStatus.OK){
                $('#route-details').parent().fadeIn();
                directionDisplay.setDirections(response);
            }
        });
    }else{
        directionDisplay.setDirections(null);
    }
}

}
google.maps.event.addDomListener(window, 'load', initialize);
</script>

我让处理程序正常工作，但路由计算不起作用。我收到类似

的错误

Uncaught Error: Invalid value for property <origin>: [object Object] 
thrown at line: directionsService.route(request, function(response, status){

如何将事件绑定到 InfoWindow 内的按钮并仍然调用 recalcRoute？ 我也试过在按钮上设置onclick，但是recalcRoute的引用是未知的。

为什么$('#infoWindow button').on('click',function(){ console.log('test'); }); 不起作用？

Answer 1

1. 要从 HTML 点击监听器访问变量，它们需要在全局上下文中。

2. 路线服务的起点和终点必须是 google.maps.LatLng 对象或可作为地址进行地理编码的字符串，而不是 google.maps.Marker 对象。可以通过以下方式检索标记的 google.maps.LatLng：

   marker.getPosition().

working example

Answer 2

您应该能够建立 contentWindow 的 HTML 并单击一次操作，然后一遍又一遍地使用它们。

contentWindow 中唯一需要更改的是标题，以反映点击标记的标题。

应该这样做：

function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(50.903033, 11.359863),
        zoom: 6,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        disableDefaultUI: true,
        zoomControl: true,
        scaleControl: true,
        overviewMapControl: true
    };
    var map = new google.maps.Map(document.getElementById('limousine-map'), mapOptions);
    var directionsService = new google.maps.DirectionsService();
    var directionDisplay = new google.maps.DirectionsRenderer();
    directionDisplay.setMap(map);
    directionDisplay.setPanel(document.getElementById('route-details'));

    var Route = {
        var request = {
            origin: null,
            destination: null,
            travelMode: google.maps.TravelMode.DRIVING,
            unitSystem: google.maps.UnitSystem.METRIC
        };
        this.setOrigin = function(m) { request.origin = m.getPosition(); };
        this.setDestination = function(m) { request.destination = m.getPosition(); };
        this.calc = function() {
            if(request.origin && request.destination) {
                directionsService.route(request, function(response, status) {
                    if(status == google.maps.DirectionsStatus.OK) {
                        $('#route-details').parent().fadeIn();
                        directionDisplay.setDirections(response);
                    }
                });
            } else {
                directionDisplay.setDirections(null);
            }
        }
    };

    var route = new Route();
    var clickedLocation;

    var $infoWindowContent = $([
        '<div class="infoWindowContent">',
        '<h3></h3>',
        '<button class="setOrigin">Start</button>',
        '<button class="setDestination" style="float: right;">Target</button>',
        '</div>'
    ].join(''));
    $infoWindowContent.find(".setOrigin").on('click', function() {
        route.setOrigin(clickedLocation);
        route.calc();
    });
    $infoWindowContent.find(".setDestination").on('click', function() {
        route.setDestination(clickedLocation);
        route.calc();
    });

    var infoWindow = new google.maps.InfoWindow();
    infoWindow.setContent($infoWindowContent.get(0));

    //Assuming array markerData to contain the data necessary for bujilding markers ...
    $.each(markerData, function(i, m) {
        var marker = new google.maps.Marker({
            map: map,
            position: new google.maps.LatLng(m.lat, m.lng),
            title: m.title
        });

        google.maps.event.addListener(marker, 'click', function() {
            clickedLocation = this;
            infoWindow.close();//necessary?
            $infoWindowContent.find("h3").text(this.getTitle());
            infoWindow.open(map, this);
        });
    });

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

未经测试

注意事项：

• 我在 Route() 构造函数中封装了与路由有关的所有内容，并使用单个实例 route。
• 我假设所有标记数据最初都包含在 markerData 数组中，该数组会循环以创建尽可能多的标记。