上次我们使用 Wijmo 和 Angular 2 创建了第一个小应用,从零开始构建 Wijmo & Angular 2 小应用, 现在就来看看如何使用 Wijmo & Angular 2 构建一个 FlexChart 。
1.新建我们的项目。
$ mkdir wj-ng2-flexgrid
$ cd wj-ng2-flexgrid
2.配置项目。
我们需要下面 3 个配置文件。
- package.json 。 用来标记项目需要使用的npm依赖包。
- tsconfig.json 。 这个是typescript的配置文件,定义了 TypeScript 编译器如何从项目源文件生成 JavaScript 代码。
- systemjs.config.js 。 为模块加载器SystemJS 提供了该到哪里查找应用模块的信息,并注册了所有必备的依赖包 。(这里使用SystemJS 来配置模块,也可以使用Webpcak,神一般的利器。详情请参考博客园专家级人物 冠军 的博客: http://www.cnblogs.com/haogj/p/5998556.html#3541215)
如果不太明白配置文件中键值对的意义,可以在底部留言或者上网查询。
->>package.json
{
"name": "wj-ng2-flexchart","version": "1.0.0","scripts": { "start": "tsc && concurrently \"tsc -w\" \"lite-server\" ","lite": "lite-server","tsc": "tsc","tsc:w": "tsc -w" },"licenses": [ { "type": "MIT","url": "https://github.com/angular/angular.io/blob/master/LICENSE" } ],"dependencies": { "@angular/common": "~2.1.1","@angular/compiler": "~2.1.1","@angular/core": "~2.1.1","@angular/forms": "~2.1.1","@angular/http": "~2.1.1","@angular/platform-browser": "~2.1.1","@angular/platform-browser-dynamic": "~2.1.1","@angular/router": "~3.1.1","@angular/upgrade": "~2.1.1","angular-in-memory-web-api": "~0.1.13","core-js": "^2.4.1","reflect-Metadata": "^0.1.8","rxjs": "5.0.0-beta.12","systemjs": "0.19.39","zone.js": "^0.6.25" },"devDependencies": { "@types/core-js": "^0.9.34","@types/node": "^6.0.45","concurrently": "^3.0.0","lite-server": "^2.2.2","typescript": "^2.0.3" } }
->> tsconfig.json
{
"compilerOptions": { "target": "es5","module": "commonjs","moduleResolution": "node","sourceMap": true,"emitDecoratorMetadata": true,"experimentalDecorators": true,"removeComments": false,"noImplicitAny": false } }
->> systemjs.config.js
/** * System configuration for Angular samples * Adjust as necessary for your application needs. */
(function (global) {
System.config({
paths: {
// paths serve as alias
'npm:': 'node_modules/'
},// map tells the System loader where to look for things
map: {
// our app is within the app folder
app: 'app',// angular bundles
'@angular/core': 'npm:@angular/core/bundles/core.umd.js','@angular/common': 'npm:@angular/common/bundles/common.umd.js','@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js','@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js','@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js','@angular/http': 'npm:@angular/http/bundles/http.umd.js','@angular/router': 'npm:@angular/router/bundles/router.umd.js','@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js','@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js',// other libraries
'rxjs': 'npm:rxjs','angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js'
},// packages tells the System loader how to load when no filename and/or no extension
packages: {
app: {
main: './main.js',defaultExtension: 'js'
},rxjs: {
defaultExtension: 'js'
}
}
});
})(this);
安装依赖包。
在当前目录下,运行
$ npm install
所有依赖包会全部下载下来,如果命令行有警告,可以忽略 。这些警告表示包里没有repository field,这些field仅仅用于一些包信息。
如果因为某些原因包无法下载,那可以使用淘宝的镜像 cnpm。这个镜像会每隔10分钟和官方同步一次。
安装结束,会在项目的根目录下多出一个node_modules 文件夹,它实在是太大了 !
现在您需要将 \wijmoEnterprise\Samples\TS\Angular2\FlexGridIntro\FlexGridIntro\node_modules\wijmo 文件夹拷贝到当前项目中的 node_modules 文件夹。这些文件用来将wijmo包包装为 es6 模块。
好了,现在的准备工作已经完成了,您可以开始创建wijmo & Angular 2 的应用了。
3. 创建目录
玩Angular 2,首先我们需要Angular 2的脚手架。
现在来看看我的文件目录,并逐一解释。
└─ wj-ng2-flexchart/ ······························· 项目所在目录
├─ node_modules/ ······························· 项目依赖包
├─ app/ ········································ 应用程序子目录
│ ├─ components/ ······························ 组件目录
│ │ ├─ app.component.html ···················· 根组件app.Component模板
│ │ └─ app.conponent.ts ······················ 根组件app.Component
│ ├─ services/ ································ 服务目录
│ │ └─ data.service.ts ······················· 数据服务 data.Service
│ ├─ app.module.ts ···························· 根模块app.module
│ └─ main.ts ·································· Angular 引导文件
├─ scripts/ ···································· 外部js 目录
│ ├─ definition/ ······························ wijmo 模块定义目录
│ └─ vendor/ ·································· wijmo 脚本目录
├─ styles/ ····································· 样式目录
├─ index.html ·································· 应用宿主页面
├─ package.json ································ npm 依赖列表
├─ systemjs.config.js ·························· systemJS 配置
├─ tsconfig.js ································· TypeScript 配置
└─ readme.md ··································· 程序说明
这看起来似乎比较复杂,但是却很有条理。
4. 编写宿主页面
在宿主页面中,除了Angular 2中必须的组件,还需要引入Wijmo js脚本。
<html>
<head>
<Meta charset="UTF-8">
<title>使用 Angular 2 来创建FlexGrid控件</title>
<!--angular 2 模块开始 -->
<!--用于填充旧版浏览器-->
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-Metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<!--systemjs 配置开始-->
<script src="systemjs.config.js"></script>
<!--wijmo 模块开始-->
<script src="scripts/vendor/wijmo.min.js"></script>
<script src="scripts/vendor/wijmo.chart.min.js"></script>
<link rel="stylesheet" href="styles/wijmo.min.css">
<script src="scripts/vendor/wijmo.angular2.min.js"></script>
<!--mine-->
<script> System.import('./app/main').catch(function(err){ console.error(err); }); </script>
</head>
<body>
<!--申明根组件-->
<app-cmp>
Loading ...
</app-cmp>
</body>
</html>
5. 编写数据服务
这个页面定义完毕,现在来编写一个数据服务。这个数据服务需要被注入到组件中,因此需要引入一个元标记 Injectable 。
data.Service 返回一些国家相关信息的随机数据。
'use strict'
import { Injectable } from '@angular/core';
@Injectable()
export class DataService {
getData(countries: string[]): any[] {
var data = [];
for (let i = 0; i < countries.length; i++) {
data.push({
country: countries[i],downloads: Math.round(Math.random() * 20000),sales: Math.random() * 10000,expenses: Math.random() * 5000
});
}
return data;
};
}
6. 编写根组件和模块
现在我们编写应用的第一个组件:根组件 app.component,也是这个程序唯一的组件。
import { Component,Inject } from '@angular/core';
import { DataService } from '../services/data.service';
@Component({
selector: 'app-cmp',templateUrl: 'app/components/app.component.html',})
export class AppComponent {
protected dataSvc: DataService;
countries = 'US,Germany,UK,Japan,Italy,Greece'.split(',');
data: { country: string,downloads: number,sales: number,expenses: number }[];
constructor( @Inject(DataService) dataSvc: DataService) {
this.dataSvc = dataSvc;
this.data = this.dataSvc.getData(this.countries);
}
}
在这个组件中,需要引入两个元标记。Component,Inject ,还需要注入定义的数据服务data.Service。
在组件app.component.html模板中,
<div>
<wj-flex-chart [itemsSource]="data" [bindingX]="'country'">
<wj-flex-chart-series [name]="'Sales'" [binding]="'sales'"></wj-flex-chart-series>
<wj-flex-chart-series [name]="'Expenses'" [binding]="'expenses'"></wj-flex-chart-series>
<wj-flex-chart-series [name]="'Downloads'" [binding]="'downloads'"></wj-flex-chart-series>
</wj-flex-chart>
</div>
在这里,仅仅需要引入一个 wj-flex-grid
标记,就可以创建一个 flexgrid控件了,wj-flex-grid
组件是作为一个子组件存在的,在app.module 模块中注入。
通过wj-flex-chart-series 来申明系列,通过bindling 来指定绑定的字段。
itemsSource 绑定一个数据源,这个itemsSource是flexgrid已经封装完成的属性。在 flexgrid 内部是通过 @Input 来完成的。
在根模块中将组件注入
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { WjGridModule } from 'wijmo/wijmo.angular2.grid';
import { AppComponent } from './components/app.component';
import { DataService } from './services/data.service';
@NgModule({
imports: [ WjGridModule,BrowserModule],declarations: [AppComponent],providers:[DataService],bootstrap: [AppComponent],})
export class AppModule { }
在这里,需要将引用的所有的组件和模块都要注入进来。
7. 引导和启动引用
最后是引导程序 main.ts
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import {enableProdMode} from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
在根目录下,运行
$ npm start
start 命令是执行定义在 package.json 文件中的scripts命令。 会将ts代码编译为原生js,并且会启动一个静态服务器。 这个服务器会检测文件的变化,当发现文件改动,那么会自动编译ts代码。
http://images2015.cnblogs.com/blog/857465/201611/857465-20161109111636561-530904138.png” alt=”效果截图” title=”” />