angular的hero例子（5）

route的使用

ng generate module app-routing –flat –module=app
ng generate component dashboard

代码：
heroes.component.ts

import { Component, OnInit } from '@angular/core';

import { Hero } from '../hero';
import { HeroService } from '../hero.service';

@Component({
  selector: 'app-heroes',
  templateUrl: './heroes.component.html',
  styleUrls: ['./heroes.component.css']
})
export class HeroesComponent implements OnInit {
  heroes: Hero[];

  constructor(private heroService: HeroService) { }

  ngOnInit() {
    this.getHeroes();
  }

  getHeroes(): void {
    this.heroService.getHeroes()
    .subscribe(heroes => this.heroes = heroes);
  }
}

heroes.component.html

<h2>My Heroes</h2>
<ul class="heroes">
  <li *ngFor="let hero of heroes">
    <a routerLink="/detail/{{hero.id}}">
      <span class="badge">{{hero.id}}</span> {{hero.name}}
    </a>
  </li>
</ul>

app.component.html

<h1>{{title}}</h1>
<app-heroes></app-heroes>
<app-messages></app-messages>

app.component.ts

<h1>{{title}}</h1>
<nav>
  <a routerLink="/dashboard">Dashboard</a>
  <a routerLink="/heroes">Heroes</a>
</nav>
<router-outlet></router-outlet>
<app-messages></app-messages>

app.component.css

h1 {
  font-size: 1.2em;
  color: #999;
  margin-bottom: 0;
}
h2 {
  font-size: 2em;
  margin-top: 0;
  padding-top: 0;
}
nav a {
  padding: 5px 10px;
  text-decoration: none;
  margin-top: 10px;
  display: inline-block;
  background-color: #eee;
  border-radius: 4px;
}
nav a:visited, a:link {
  color: #607D8B;
}
nav a:hover {
  color: #039be5;
  background-color: #CFD8DC;
}
nav a.active {
  color: #039be5;
}

app.module.ts

import { NgModule }       from '@angular/core';
import { BrowserModule }  from '@angular/platform-browser';
import { FormsModule }    from '@angular/forms';

import { AppComponent }         from './app.component';
import { DashboardComponent }   from './dashboard/dashboard.component';
import { HeroDetailComponent }  from './hero-detail/hero-detail.component';
import { HeroesComponent }      from './heroes/heroes.component';
import { HeroService }          from './hero.service';
import { MessageService }       from './message.service';
import { MessagesComponent }    from './messages/messages.component';

import { AppRoutingModule }     from './app-routing.module';

@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    AppRoutingModule
  ],
  declarations: [
    AppComponent,
    DashboardComponent,
    HeroesComponent,
    HeroDetailComponent,
    MessagesComponent
  ],
  providers: [ HeroService, MessageService ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }

hero.ts

export class Hero {
  id: number;
  name: string;
}

mock-heroes.ts

/**
 * Created by gmy on 2017/12/4.
 */
import { Hero } from './hero';

export const HEROES: Hero[] = [
  { id: 11, name: 'Mr. Nice' },
  { id: 12, name: 'Narco' },
  { id: 13, name: 'Bombasto' },
  { id: 14, name: 'Celeritas' },
  { id: 15, name: 'Magneta' },
  { id: 16, name: 'RubberMan' },
  { id: 17, name: 'Dynama' },
  { id: 18, name: 'Dr IQ' },
  { id: 19, name: 'Magma' },
  { id: 20, name: 'Tornado' }
];

heroes.component.css

.heroes {
  margin: 0 0 2em 0;
  list-style-type: none;
  padding: 0;
  width: 15em;
}
.heroes li {
  position: relative;
  cursor: pointer;
  background-color: #EEE;
  margin: .5em;
  padding: .3em 0;
  height: 1.6em;
  border-radius: 4px;
}

.heroes li:hover {
  color: #607D8B;
  background-color: #DDD;
  left: .1em;
}

.heroes a {
  color: #888;
  text-decoration: none;
  position: relative;
  display: block;
  width: 250px;
}

.heroes a:hover {
  color:#607D8B;
}

.heroes .badge {
  display: inline-block;
  font-size: small;
  color: white;
  padding: 0.8em 0.7em 0 0.7em;
  background-color: #607D8B;
  line-height: 1em;
  position: relative;
  left: -1px;
  top: -4px;
  height: 1.8em;
  min-width: 16px;
  text-align: right;
  margin-right: .8em;
  border-radius: 4px 0 0 4px;
}

hero-detail.component.ts

import { Component, OnInit, Input } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { Location } from '@angular/common';

import { Hero }         from '../hero';
import { HeroService }  from '../hero.service';

@Component({
  selector: 'app-hero-detail',
  templateUrl: './hero-detail.component.html',
  styleUrls: [ './hero-detail.component.css' ]
})
export class HeroDetailComponent implements OnInit {
  @Input() hero: Hero;

  constructor(
    private route: ActivatedRoute,
    private heroService: HeroService,
    private location: Location
  ) {}

  ngOnInit(): void {
    this.getHero();
  }

  getHero(): void {
    const id = +this.route.snapshot.paramMap.get('id');
    this.heroService.getHero(id)
      .subscribe(hero => this.hero = hero);
  }

  goBack(): void {
    this.location.back();
  }
}

hero-detail.component.html

<div *ngIf="hero">
  <h2>{{ hero.name | uppercase }} Details</h2>
  <div><span>id: </span>{{hero.id}}</div>
  <div>
    <label>name:
      <input [(ngModel)]="hero.name" placeholder="name"/>
    </label>
  </div>
  <button (click)="goBack()">go back</button>
</div>

hero.service.ts

import { Injectable } from '@angular/core';

import { Observable } from 'rxjs/Observable';
import { of } from 'rxjs/observable/of';

import { Hero } from './hero';
import { HEROES } from './mock-heroes';
import { MessageService } from './message.service';

@Injectable()
export class HeroService {

  constructor(private messageService: MessageService) { }

  getHeroes(): Observable<Hero[]> {
    // Todo: send the message _after_ fetching the heroes
    this.messageService.add('HeroService: fetched heroes');
    return of(HEROES);
  }
}

message.service.ts

import { Injectable } from '@angular/core';

import { Observable } from 'rxjs/Observable';
import { of } from 'rxjs/observable/of';

import { Hero } from './hero';
import { HEROES } from './mock-heroes';
import { MessageService } from './message.service';

@Injectable()
export class HeroService {

  constructor(private messageService: MessageService) { }

  getHeroes(): Observable<Hero[]> {
    // Todo: send the message _after_ fetching the heroes
    this.messageService.add('HeroService: fetched heroes');
    return of(HEROES);
  }
  getHero(id: number): Observable<Hero> {
    // Todo: send the message _after_ fetching the hero
    this.messageService.add(`HeroService: fetched hero id=${id}`);
    return of(HEROES.find(hero => hero.id === id));
  }
}

message.component.ts

import { Component, OnInit } from '@angular/core';
import { MessageService } from '../message.service';

@Component({
  selector: 'app-messages',
  templateUrl: './messages.component.html',
  styleUrls: ['./messages.component.css']
})
export class MessagesComponent implements OnInit {

  constructor(public messageService: MessageService) {}

  ngOnInit() {
  }

}

message.component.html

<div *ngIf="messageService.messages.length">

  <h2>Messages</h2>
  <button class="clear"
          (click)="messageService.clear()">clear</button>
  <div *ngFor='let message of messageService.messages'> {{message}} </div>

</div>

message.component.css

h2 {
  color: red;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: lighter;
}
body {
  margin: 2em;
}
body, input[text], button {
  color: crimson;
  font-family: Cambria, Georgia;
}

button.clear {
  font-family: Arial;
  background-color: #eee;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  cursor: hand;
}
button:hover {
  background-color: #cfd8dc;
}
button:disabled {
  background-color: #eee;
  color: #aaa;
  cursor: auto;
}
button.clear {
  color: #888;
  margin-bottom: 12px;
}

app-routing.module.ts

import { NgModule }             from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { DashboardComponent }   from './dashboard/dashboard.component';
import { HeroesComponent }      from './heroes/heroes.component';
import { HeroDetailComponent }  from './hero-detail/hero-detail.component';

const routes: Routes = [
  { path: '', redirectTo: '/dashboard', pathMatch: 'full' },
  { path: 'dashboard', component: DashboardComponent },
  { path: 'detail/:id', component: HeroDetailComponent },
  { path: 'heroes', component: HeroesComponent }
];

@NgModule({
  imports: [ RouterModule.forRoot(routes) ],
  exports: [ RouterModule ]
})
export class AppRoutingModule {}

dashboard.component.html

<h3>Top Heroes</h3>
<div class="grid grid-pad">
  <a *ngFor="let hero of heroes" class="col-1-4"
      routerLink="/detail/{{hero.id}}">
    <div class="module hero">
      <h4>{{hero.name}}</h4>
    </div>
  </a>
</div>

dashboard.component.ts

import { Component, OnInit } from '@angular/core';
import { Hero } from '../hero';
import { HeroService } from '../hero.service';

@Component({
  selector: 'app-dashboard',
  templateUrl: './dashboard.component.html',
  styleUrls: [ './dashboard.component.css' ]
})
export class DashboardComponent implements OnInit {
  heroes: Hero[] = [];

  constructor(private heroService: HeroService) { }

  ngOnInit() {
    this.getHeroes();
  }

  getHeroes(): void {
    this.heroService.getHeroes()
      .subscribe(heroes => this.heroes = heroes.slice(1, 5));
  }
}

dashboard.component.css

[class*='col-'] {
  float: left;
  padding-right: 20px;
  padding-bottom: 20px;
}
[class*='col-']:last-of-type {
  padding-right: 0;
}
a {
  text-decoration: none;
}
*, *:after, *:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
h3 {
  text-align: center; margin-bottom: 0;
}
h4 {
  position: relative;
}
.grid {
  margin: 0;
}
.col-1-4 {
  width: 25%;
}
.module {
  padding: 20px;
  text-align: center;
  color: #eee;
  max-height: 120px;
  min-width: 120px;
  background-color: #607D8B;
  border-radius: 2px;
}
.module:hover {
  background-color: #EEE;
  cursor: pointer;
  color: #607d8b;
}
.grid-pad {
  padding: 10px 0;
}
.grid-pad > [class*='col-']:last-of-type {
  padding-right: 20px;
}
@media (max-width: 600px) {
  .module {
    font-size: 10px;
    max-height: 75px; }
}
@media (max-width: 1024px) {
  .grid {
    margin: 0;
  }
  .module {
    min-width: 60px;
  }
}

hero-detail.component.css

label {
  display: inline-block;
  width: 3em;
  margin: .5em 0;
  color: #607D8B;
  font-weight: bold;
}
input {
  height: 2em;
  font-size: 1em;
  padding-left: .4em;
}
button {
  margin-top: 20px;
  font-family: Arial;
  background-color: #eee;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer; cursor: hand;
}
button:hover {
  background-color: #cfd8dc;
}
button:disabled {
  background-color: #eee;
  color: #ccc;
  cursor: auto;
}