PrimeNG之Input(一)

Input之AutoComplete

--自动完成功能是输入组件，提供实时的建议当打字。

Import

import {AutoCompleteModule} from 'primeng/primeng';

demo code

<h3 class="first">Basic</h3>
<p-autoComplete [(ngModel)]="country" [suggestions]="filteredCountriesSingle" (completeMethod)="filterCountrySingle($event)" field="name" [size]="30"
    placeholder="Countries" [minLength]="1"></p-autoComplete>
<span style="margin-left:10px">Country: {{country ? country.name||country : 'none'}}</span>

<h3>Advanced</h3>
<p-autoComplete [(ngModel)]="brand" [suggestions]="filteredBrands" (completeMethod)="filterBrands($event)" [size]="30"
    [minLength]="1" placeholder="Hint: type 'v' or 'f'" [dropdown]="true" (onDropdownClick)="handleDropdownClick($event)">
    <ng-template let-brand pTemplate="item">
        <div class="ui-helper-clearfix" style="border-bottom:1px solid #D5D5D5">
            <img src="showcase/resources/demo/images/car/{{brand}}.gif" style="width:32px;display:inline-block;margin:5px 0 2px 5px"/>
            <div style="font-size:18px;float:right;margin:10px 10px 0 0">{{brand}}</div>
        </div>
    </ng-template>
</p-autoComplete>
<span style="margin-left:50px">Brand: {{brand||'none'}}</span>

<h3>Multiple</h3>
<p-autoComplete [(ngModel)]="countries" [suggestions]="filteredCountriesMultiple" (completeMethod)="filterCountryMultiple($event)" styleClass="wid100"
    [minLength]="1" placeholder="Countries" field="name" [multiple]="true">
</p-autoComplete>
<ul>
    <li *ngFor="let c of countries">{{c.name}}</li>
</ul>

export class AutoCompleteDemo {

    country: any;
    
    countries: any[];
        
    filteredCountriesSingle: any[];
    
    filteredCountriesMultiple: any[];
    
    brands: string[] = ['Audi','BMW','Fiat','Ford','Honda','Jaguar','Mercedes','Renault','Volvo','VW'];
    
    filteredBrands: any[];
    
    brand: string;
    
    constructor(private countryService: CountryService) { }
    
    filterCountrySingle(event) {
        let query = event.query;        
        this.countryService.getCountries().then(countries => {
            this.filteredCountriesSingle = this.filterCountry(query, countries);
        });
    }
    
    filterCountryMultiple(event) {
        let query = event.query;
        this.countryService.getCountries().then(countries => {
            this.filteredCountriesMultiple = this.filterCountry(query, countries);
        });
    }
    
    filterCountry(query, countries: any[]):any[] {
        //in a real application, make a request to a remote url with the query and return filtered results, for demo we filter at client side
        let filtered : any[] = [];
        for(let i = 0; i < countries.length; i++) {
            let country = countries[i];
            if(country.name.toLowerCase().indexOf(query.toLowerCase()) == 0) {
                filtered.push(country);
            }
        }
        return filtered;
    }
        
    filterBrands(event) {
        this.filteredBrands = [];
        for(let i = 0; i < this.brands.length; i++) {
            let brand = this.brands[i];
            if(brand.toLowerCase().indexOf(event.query.toLowerCase()) == 0) {
                this.filteredBrands.push(brand);
            }
        }
    }
    
    handleDropdownClick() {
        this.filteredBrands = [];
        
        //mimic remote call
        setTimeout(() => {
            this.filteredBrands = this.brands;
        }, 100)
    }
}

@Injectable()
export class CountryService {
    
    constructor(private http: Http) {}

    getCountries() {
        return this.http.get('showcase/resources/data/countries.json')
                    .toPromise()
                    .then(res => <any[]> res.json().data)
                    .then(data => { return data; });
    }
}

参考：

https://www.primefaces.org/primeng/#/autocomplete