Javascript AngularJS+;阿尔吉斯
我尝试在一个角度应用程序中使用。如我所见,它使用Dojo。因此,我尝试从Angular指令初始化ArcGIS,如下所示:Javascript AngularJS+;阿尔吉斯,javascript,angularjs,dojo,arcgis,arcgis-js-api,Javascript,Angularjs,Dojo,Arcgis,Arcgis Js Api,我尝试在一个角度应用程序中使用。如我所见,它使用Dojo。因此,我尝试从Angular指令初始化ArcGIS,如下所示: link: function (scope, element, attrs) { dojo.require('esri.map'); var init = function () { console.log('dojo is ready'); var map = new esri.Map("map-container", {
link: function (scope, element, attrs) {
dojo.require('esri.map');
var init = function () {
console.log('dojo is ready');
var map = new esri.Map("map-container", {
center: [-111.3797, 56.7266 ],
zoom: 16,
basemap: "streets"
});
map.enableScrollWheelZoom()
};
dojo.addOnLoad(init);
}
看起来这种方式不是100%正确的,因为当我尝试通过滚动鼠标滚轮进行缩放时,会出现以下错误:
Uncaught TypeError: Cannot call method 'apply' of null
我的问题是,如何在Angular应用程序中正确地注入ArcGIS功能?看起来您正试图在指令元素中构建地图。这是一个合法的使用,但我会确保你使用的AMD装载机的Dojo加载你的模块,然后你的Angular应用程序后,所有的Dojo善良是准备好的 我最近写了一篇关于Angular/Esri dev的文章,可以找到一个示例项目的源代码 我实际上是从一个控制器构建映射,但是这个过程应该类似于在指令中构建它
define([
'angular',
'esri/map'
], function(angular, Map) {
function mapConfigs() {
return {
basemap: 'streets',
center: [-118.1704035141802,34.03597014510993],
zoom: 15
};
}
function mapGen(elem) {
return new Map(elem, mapConfigs());
}
function AppController($scope) {
$scope.map = mapGen('map');
}
function init(App) {
App.controller('AppCtrl', ['$scope', AppController]);
return AppController;
}
return { start: init };
});
在引导Angular应用程序之前,我使用引导模块使用Esri/Dojo位构建所有角度位
define([
'angular',
'controllers/AppController',
'widgets/search/SearchBootstrap'
], function(angular, AppController, SearchBootstrap) {
function init() {
var App = angular.module('app', ['ui.bootstrap']);
AppController.start(App);
SearchBootstrap.start(App);
// need to bootstrap angular since we wait for dojo/DOM to load
angular.bootstrap(document.body, ['app']);
return App;
}
return { start: init };
});
希望这能有所帮助。我认为一个非常“AngularJS”风格的方法应该如下所示。(在这里拉小提琴) 我喜欢使用
angular ui路由器
,但这种方法也适用于angular的$routeProvider
。这里的魔力在于resolve对象,它可以选择“等待”直到承诺得到解决,然后再继续
angular.module('webApp', ['ui.router'])
// module (app) config
.config(function ($stateProvider, $urlRouterProvider) {
$urlRouterProvider.otherwise('/map');
$stateProvider.state('map', {
url: '/map',
template: '<div id="map"></div>',
controller: 'MapCtrl',
resolve: {
promiseObj: function ($q, $rootScope, wish) {
var deferred = $q.defer(),
deps = {
Map: 'esri/map',
FeatureLayer: 'esri/layers/FeatureLayer',
InfoTemplate: 'esri/InfoTemplate',
SimpleFillSymbol: 'esri/symbols/SimpleFillSymbol',
SimpleRenderer: 'esri/renderers/SimpleRenderer',
SimpleMarkerSymbol: 'esri/symbols/SimpleMarkerSymbol',
ScaleDependentRenderer: 'esri/renderers/ScaleDependentRenderer',
Color: 'dojo/_base/Color'
};
wish.loadDependencies(deps, function () {
deferred.resolve();
if (!$rootScope.$$phase) {
$rootScope.$apply();
}
});
return deferred.promise;
}
}
});
});
之后,在MapCtrl
中,您可以直接调用所有ArcGIS/Dojo FN(正常情况下),方法是使用在app config期间构造的deps
对象中使用的键,因为它们现在连接到wish.get()返回的对象
下面是此处示例的修改版本()
angular.module('webApp')
//我们的地图控制器
.controller('MapCtrl',函数($rootScope,$scope,wish){
var w=wish.get(),
绿色填充=新的w颜色([133197133,0.75]),
绿色轮廓=新的w颜色([133197133,0.25]),
层,
markerSym,
渲染器1,
渲染器2,
农作物http://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/USA_County_Crops_2007/FeatureServer/0';
$scope.map=new w.map('map'{
中心:[-98.579,39.828],
缩放:4,
底图:“灰色”
});
图层=新的w.FeatureLayer(作物\u URL{
外场:[“州”、“县”、“M086_07”、“地区”],
infoTemplate:new w.infoTemplate(“${country},${STATE}”,“代表农田的县面积百分比为${M086_07}%”)
});
layer.setDefinitionExpression('AREA>0.01和M086_07>0');
markerSym=新的w.SimpleMarkerSymbol();
标记符号setColor(绿色填充);
markerSym.setOutline(markerSym.outline.setColor(greenOutline));
Render1=新的w.SimpleRenderer(markerSym);
Render1.SetProgressionalSymbolInfo({
字段:“M086_07”,
minSize:1,
最大尺寸:10,
minDataValue:0,
maxDataValue:100
});
//对于第二个渲染器,增加点大小并设置backgroundFillSymbol
Render2=新的w.SimpleRenderer(markerSym);
Renderr2.SetProgressionalSymbolInfo({
字段:“M086_07”,
minSize:5,
最大尺寸:15,
minDataValue:0,
maxDataValue:100
});
layer.setRenderer(新的w.ScaledPendenderer({
渲染器信息:[{
“渲染器”:渲染器1,
“minScale”:50000000,
“最大规模”:10000000
}, {
“渲染器”:渲染器2,
“minScale”:0,
“最大规模”:5000000
}]
}));
$scope.map.addLayer(层);
});
working fiddle演示了上面的代码,可以在这里找到我喜欢你的解决方案,但我有一个小问题。我正在使用angular translate,从“//js.arcgis.com/3.14”加载init.js需要一秒钟的时间,这导致angular translate显示为{{'something'| translate}},而不是呈现的文本,直到加载init.js才能加载'require'。你知道在wish服务中删除require依赖项的方法吗?我会通过预加载或“数据加载”标志在你的UI中处理这个问题。一个相当不错的问题解释和可能的解决方案在这里谢谢,我会试试这个。
angular.module('webApp')
// service that deals w/ our dojo require
.service('wish', function () {
// it's not require... it's a wish?
var wish = {};
function _loadDependencies(deps, next) {
var reqArr = _.values(deps),
keysArr = _.keys(deps);
// use the dojo require (required by arcgis + dojo) && save refs
// to required obs
require(reqArr, function () {
var args = arguments;
_.each(keysArr, function (name, idx) {
wish[name] = args[idx];
});
next();
});
}
return {
loadDependencies: function (deps, next) {
_loadDependencies(deps, next);
},
get: function () {
return wish;
}
};
});
angular.module('webApp')
// our map controller
.controller('MapCtrl', function ($rootScope, $scope, wish) {
var w = wish.get(),
greenFill = new w.Color([133, 197, 133, 0.75]),
greenOutline = new w.Color([133, 197, 133, 0.25]),
layer,
markerSym,
renderer1,
renderer2,
CROPS_URL = 'http://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/USA_County_Crops_2007/FeatureServer/0';
$scope.map = new w.Map('map', {
center: [-98.579, 39.828],
zoom: 4,
basemap: 'gray'
});
layer = new w.FeatureLayer(CROPS_URL, {
outFields: ['STATE', 'COUNTY', 'M086_07', 'AREA'],
infoTemplate: new w.InfoTemplate('${COUNTY}, ${STATE}', '<div style="font: 18px Segoe UI">The percentage of the area of the county that represents farmland is <b>${M086_07}%</b>.</div>')
});
layer.setDefinitionExpression('AREA>0.01 and M086_07>0');
markerSym = new w.SimpleMarkerSymbol();
markerSym.setColor(greenFill);
markerSym.setOutline(markerSym.outline.setColor(greenOutline));
renderer1 = new w.SimpleRenderer(markerSym);
renderer1.setProportionalSymbolInfo({
field: 'M086_07',
minSize: 1,
maxSize: 10,
minDataValue: 0,
maxDataValue: 100
});
//for the second renderer increase the dot sizes and set a backgroundFillSymbol
renderer2 = new w.SimpleRenderer(markerSym);
renderer2.setProportionalSymbolInfo({
field: 'M086_07',
minSize: 5,
maxSize: 15,
minDataValue: 0,
maxDataValue: 100
});
layer.setRenderer(new w.ScaleDependentRenderer({
rendererInfos: [{
'renderer': renderer1,
'minScale': 50000000,
'maxScale': 10000000
}, {
'renderer': renderer2,
'minScale': 0,
'maxScale': 5000000
}]
}));
$scope.map.addLayer(layer);
});