1/* 2* Copyright (c) 2023 Hunan OpenValley Digital Industry Development Co., Ltd. 3* Licensed under the Apache License, Version 2.0 (the "License"); 4* you may not use this file except in compliance with the License. 5* You may obtain a copy of the License at 6* 7* http://www.apache.org/licenses/LICENSE-2.0 8* 9* Unless required by applicable law or agreed to in writing, software 10* distributed under the License is distributed on an "AS IS" BASIS, 11* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12* See the License for the specific language governing permissions and 13* limitations under the License. 14*/ 15 16import Queue from '@ohos.util.Queue'; 17import { BaseDataSource } from '@ohos/common/src/main/ets/components/BaseDataSource'; 18import { Information } from '../../model/Information'; 19 20export class QueueDataSource extends BaseDataSource { 21 private dataArr: Queue<Information> = new Queue(); 22 23 public totalCount(): number { 24 return this.dataArr.length; 25 } 26 27 public getData(index: number): Information { 28 return this.dataArr[index]; 29 } 30 31 public addData(information: Information): void { 32 this.dataArr.add(information); 33 this.dataArr.forEach((value, index) => { 34 value.clickAble = index === 0; 35 }); 36 this.notifyDataAdd(this.dataArr.length - 1); 37 this.notifyDataReload(); 38 } 39 40 public deleteData(): void { 41 this.dataArr.pop(); 42 this.dataArr.forEach((value, index) => { 43 value.clickAble = index === 0; 44 }); 45 this.notifyDataDelete(0); 46 this.notifyDataReload(); 47 } 48}