Created
March 22, 2013 12:18
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leaflet json layers with migurski's json server
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| var m = L.map('map').setView([42.2, -71], 8); | |
| var stamenBase = | |
| L.tileLayer("http://{s}.tile.stamen.com/terrain-background/{z}/{x}/{y}.png",{minZoom:4,maxZoom:18,attribution:'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> — Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>'}); | |
| stamenBase.addTo(m); | |
| var tileJSON = L.tileLayer.canvas(); | |
| tileJSON.drawTile = function(canvas, tilePoint, zoom) { | |
| var onEachFeature=function(feature, layer) { | |
| if (feature.properties) { | |
| layer.bindPopup(Object.keys(feature.properties).map(function(k){ | |
| return k + ": " + feature.properties[k] ; | |
| }).join("<br />")); | |
| } | |
| } | |
| L.geoJson.ajax(L.Util.template("http://tile.openstreetmap.us/vectiles-highroad/{z}/{x}/{y}.json",{z:zoom,x:tilePoint.x,y:tilePoint.y}),{dataType:"jsonp",onEachFeature:onEachFeature}).addTo(m); | |
| }; | |
| tileJSON.addTo(m); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> | |
| <meta name="viewport" content="width=1024, user-scalable=no"> | |
| <style> | |
| html { height: 100% } | |
| body { height: 100%; margin: 0; padding: 0;} | |
| #map{ height: 100% } | |
| </style> | |
| <title>migurski vector layers</title> | |
| </head> | |
| <body> | |
| <div id="map"></div><script src="http://leaflet-extras.github.com/leaflet.css/dist/leaflet.css.bundle.min.js"></script> | |
| <script src="http://leaflet-extras.github.com/leaflet-providers/leaflet-providers.js"></script> | |
| <script type="text/javascript" src="leaflet.ajax.js"></script> | |
| <script type="text/javascript" src="aScript.js"></script> | |
| </body> | |
| </html> |
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| L.GeoJSON.AJAX=L.GeoJSON.extend({ | |
| defaultAJAXparams:{ | |
| dataType:"json", | |
| callbackParam:"callback", | |
| middleware:function(f){return f;} | |
| }, | |
| initialize: function (url, options) { // (String, Object) | |
| this._urls = []; | |
| if (url) { | |
| if (typeof url === "string") { | |
| this._urls.push(url); | |
| }else if (typeof url.pop === "function") { | |
| this._urls = this._urls.concat(url) | |
| }else{ | |
| options = url | |
| url = undefined | |
| } | |
| } | |
| var ajaxParams = L.Util.extend({}, this.defaultAJAXparams); | |
| for (var i in options) { | |
| if (this.defaultAJAXparams.hasOwnProperty(i)) { | |
| ajaxParams[i] = options[i]; | |
| } | |
| } | |
| this.ajaxParams = ajaxParams; | |
| this._layers = {}; | |
| L.Util.setOptions(this, options); | |
| if(this._urls.length > 0){ | |
| this.addUrl(); | |
| } | |
| }, | |
| addUrl: function (url) { | |
| var _this = this; | |
| if(url){ | |
| if (typeof url === "string") { | |
| _this._urls.push(url); | |
| }else if (typeof url.pop === "function") { | |
| _this._urls = _this._urls.concat(url) | |
| } | |
| } | |
| var _this = this; | |
| var len = _this._urls.length; | |
| var i=0; | |
| _this.fire("beforeDataLoad"); | |
| while(i<len){ | |
| if(_this.ajaxParams.dataType.toLowerCase()==="json"){ | |
| L.Util.ajax(_this._urls[i], function(d){var data = _this.ajaxParams.middleware(d);_this.addData(data);_this.fire("dataLoaded");}); | |
| }else if(_this.ajaxParams.dataType.toLowerCase()==="jsonp"){ | |
| L.Util.ajax(_this._urls[i],{jsonp:true}, function(d){var data = _this.ajaxParams.middleware(d);_this.addData(data);_this.fire("dataLoaded");}, _this.ajaxParams.callbackParam); | |
| } | |
| i++ | |
| } | |
| _this.fire("dataLoadComplete"); | |
| }, | |
| refresh: function (url){ | |
| url = url || this._urls; | |
| this.clearLayers(); | |
| this.addUrl(url); | |
| }, | |
| refilter:function (func){ | |
| if(typeof func !== "function"){ | |
| this.eachLayer(function(a){ | |
| a.setStyle({stroke:true,clickable:true}); | |
| }); | |
| }else{ | |
| this.eachLayer(function(a){ | |
| if(func(a.feature)){ | |
| a.setStyle({stroke:true,clickable:true}); | |
| }else{ | |
| a.setStyle({stroke:false,clickable:false}); | |
| } | |
| }); | |
| } | |
| } | |
| }); | |
| L.geoJson.ajax = function (geojson, options) { | |
| return new L.GeoJSON.AJAX(geojson, options); | |
| }; | |
| L.Util.ajax = function (url,options, cb) { | |
| var cbName,ourl,cbSuffix,scriptNode, head, cbParam; | |
| if(typeof options === "function"){ | |
| cb = options; | |
| options = {}; | |
| } | |
| if(options.jsonp){ | |
| head = document.getElementsByTagName('head')[0]; | |
| cbParam = options.cbParam || "callback"; | |
| if(options.callbackName){ | |
| cbName= options.callbackName; | |
| }else{ | |
| cbSuffix = "_" + ("" + Math.random()).slice(2); | |
| cbName = "L.Util.ajax.cb." + cbSuffix; | |
| } | |
| scriptNode = L.DomUtil.create('script', '', head); | |
| scriptNode.type = 'text/javascript'; | |
| if(cbSuffix) { | |
| L.Util.ajax.cb[cbSuffix] = function(data){ | |
| head.removeChild(scriptNode); | |
| delete L.Util.ajax.cb[cbSuffix] | |
| cb(data); | |
| }; | |
| } | |
| if (url.indexOf("?") === -1 ){ | |
| ourl = url+"?"+cbParam+"="+cbName; | |
| }else{ | |
| ourl = url+"&"+cbParam+"="+cbName; | |
| } | |
| scriptNode.src = ourl; | |
| }else{ | |
| // the following is from JavaScript: The Definitive Guide | |
| if (window.XMLHttpRequest === undefined) { | |
| window.XMLHttpRequest = function() { | |
| try { | |
| return new ActiveXObject("Microsoft.XMLHTTP.6.0"); | |
| } | |
| catch (e1) { | |
| try { | |
| return new ActiveXObject("Microsoft.XMLHTTP.3.0"); | |
| } | |
| catch (e2) { | |
| throw new Error("XMLHttpRequest is not supported"); | |
| } | |
| } | |
| }; | |
| } | |
| var response, request = new XMLHttpRequest(); | |
| request.open("GET", url); | |
| request.onreadystatechange = function() { | |
| if (request.readyState === 4 && request.status === 200) { | |
| if(window.JSON) { | |
| response = JSON.parse(request.responseText); | |
| } else { | |
| response = eval("("+ request.responseText + ")"); | |
| } | |
| cb(response); | |
| } | |
| }; | |
| request.send(); | |
| } | |
| }; | |
| L.Util.ajax.cb = {}; |
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