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javascript - 如何将 CustomMarker 与 MarkerClustererPlus 一起使用?

转载 作者:太空宇宙 更新时间:2023-11-04 16:18:50 26 4
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我有以下 jsFiddle代码

  var map;
var overlay;
function initialize() {
var opts = {
zoom: 9,
center: new google.maps.LatLng(-34.397, 151.644),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), opts);
overlay = new CustomMarker(new google.maps.LatLng(-34.345, 151.65), map, "hola", null);
var overlay2 = new CustomMarker(new google.maps.LatLng(-34.395, 151.644), map, "hello", null);
MC = new MarkerClusterer(map, [], MC_Opc);
MARKERS.push(overlay);
MARKERS.push(overlay2);
MC = new MarkerClusterer(map, MARKERS , MC_Opc);
}

google.maps.event.addDomListener(window, "load", function () {
initialize();
});

我正在使用 MarkerClustererPlus 和 CustomMarker ,但是当我尝试创建集群时,控制台显示以下错误:Uncaught TypeError: b.getDraggable is not a function
如何让 markerCluster 正常工作?

最佳答案

将 .getDraggable 方法添加到您的 CustomMarker:

CustomMarker.prototype.getDraggable = function() { return false; };

working fiddle

screenshot of resulting map

代码片段:

var MC;
var MC_Opc = {
gridSize: 50,
maxZoom: 15,
imagePath: 'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m'
};
var MARKER;
var MARKERS = [];
// example
var map;
var overlay;

function initialize() {
var opts = {
zoom: 9,
center: new google.maps.LatLng(-34.397, 151.644),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), opts);

overlay = new CustomMarker(new google.maps.LatLng(-34.345, 151.65), map, "hola", null);
var overlay2 = new CustomMarker(new google.maps.LatLng(-34.395, 151.644), map, "hello", null);
MC = new MarkerClusterer(map, [], MC_Opc);
MARKERS.push(overlay);
MARKERS.push(overlay2);
MC = new MarkerClusterer(map, MARKERS, MC_Opc);
}

google.maps.event.addDomListener(window, "load", function() {
initialize();
});

function CanvasCrear(texto, height_, div) {
var context;
var canvas = document.createElement("canvas");
canvas.style.cssText = 'color: Black; background: #ffffff; background: url(data:image/svg+xml; base64, 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); background: -moz-linear-gradient(top, #ffffff 0%, #ffb442 100%); background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #ffffff), color-stop(100%, #ffb442)); background: -webkit-linear-gradient(top, #ffffff 0%, #ffb442 100%); background: -o-linear-gradient(top, #ffffff 0%, #ffb442 100%); background: -ms-linear-gradient(top, #ffffff 0%, #ffb442 100%); background: linear-gradient(to bottom, #ffffff 0%, #ffb442 100%); filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#ffffff", endColorstr="#ffb442", GradientType=0); border-width: 1px; -moz-border-radius: 2px; -webkit-border-radius: 2px; border-radius: 2px; font-family:"Lucida Grande", "Arial", sans-serif; pointer-events: none;';

var txtWidth;
txtWidth = canvas.getContext("2d");
txtWidth.font = "12px Sans-Serif";

var width_ = txtWidth.measureText(texto).width; //Calculando el width de la letra
//console.log(width_);
//canvas.style.border = "thin solid black";
canvas.setAttribute("width", (width_ + "px"));
canvas.setAttribute("height", (height_ + "px"));

context = canvas.getContext("2d");
context.font = "12px Sans-Serif";

context.fillStyle = "black";
context.fillText(texto, 0, 12);

return div.appendChild(canvas);
}


function CustomMarker(position, map, text, icon) {
this.latlng_ = position;
this.text_ = text;
this.icon = icon;
// Once the LatLng and text are set, add the overlay to the map. This will
// trigger a call to panes_changed which should in turn call draw.
this.setMap(map);
}


CustomMarker.prototype = new google.maps.OverlayView();
CustomMarker.prototype.getDraggable = function() {
return false;
};
CustomMarker.prototype.draw = function() {
var me = this;

// Check if the div has been created.
var div = this.div_;
if (!div) {
// Create a overlay text DIV
div = this.div_ = document.createElement('DIV');
// Create the DIV representing our CustomMarker
div.style.border = "none";
div.style.position = "absolute";
div.style.paddingLeft = "0px";
div.style.cursor = 'pointer';


CanvasCrear(this.text_, 15, div)

google.maps.event.addDomListener(div, "click", function(event) {
google.maps.event.trigger(me, "click");
});

// Then add the overlay to the DOM
var panes = this.getPanes();
panes.overlayImage.appendChild(div);
}

// Position the overlay
var point = this.getProjection().fromLatLngToDivPixel(this.latlng_);
if (point) {
div.style.left = point.x + 'px';
div.style.top = point.y + 'px';
}
};

CustomMarker.prototype.remove = function() {
// Check if the overlay was on the map and needs to be removed.
if (this.div_) {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
}
};

CustomMarker.prototype.getPosition = function() {
return this.latlng_;
};


function addOverlay() {
overlay.setMap(map);
}

function removeOverlay() {
overlay.setMap(null);
}
html {
width: 100%;
height: 100%;
}
body {
width: 100%;
height: 100%;
margin: 0;
}
#map_canvas {
width: 100%;
height: 100%;
}
<script src="https://unpkg.com/@google/markerclustererplus@4.0.1/dist/markerclustererplus.min.js"></script>
<script src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div id="map_canvas" width="300" height="200"></div>

关于javascript - 如何将 CustomMarker 与 MarkerClustererPlus 一起使用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30577032/

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