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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 HashMap from '@ohos.util.HashMap';
17import emitter from '@ohos.events.emitter';
18import { EmptyPage } from '@ohos/common/src/main/ets/components/EmptyPage';
19import { logger } from '@ohos/common/src/main/ets/util/Logger';
20import { KeyValueItemView } from '../components/KeyValueItemView';
21import { KeyValuePair } from '../model/KeyValuePair';
22import { HashMapDataSource } from '../components/hashmapcomponents/HashMapDataSource';
23import { Constant } from '../Constant';
24
25const TAG = 'HashMapView';
26
27@Component
28export struct HashMapView {
29  @State totalCount: number = 0;
30  private hashMap: HashMap<string, string> = new HashMap();
31  private dataSource: HashMapDataSource = new HashMapDataSource();
32
33  aboutToAppear() {
34    emitter.on({ eventId: Constant.EMITTER_ID_HASH_MAP }, (eventData) => {
35      let item: KeyValuePair = eventData.data as KeyValuePair;
36      this.dataSource.addData(item);
37      this.totalCount = this.dataSource.totalCount();
38      this.hashMap.set(item.key, item.value);
39    });
40  }
41
42  aboutToDisappear() {
43    emitter.off(Constant.EMITTER_ID_HASH_MAP);
44  }
45
46  build() {
47    Column() {
48      if (this.totalCount != 0) {
49        List({ space: 12 }) {
50          LazyForEach(this.dataSource, (item: KeyValuePair, index: number) => {
51            ListItem() {
52              KeyValueItemView({
53                index: index,
54                keyValuePair: item,
55                deleteAction: () => {
56                  logger.info(TAG, `item = ${JSON.stringify(item)}`)
57                  this.dataSource.deleteData(item, index);
58                  this.totalCount = this.dataSource.totalCount();
59                  this.hashMap.remove(item.key);
60                }
61              })
62            }
63            .height(72)
64            .width('100%')
65          }, (item: KeyValuePair, index: number) => JSON.stringify(item) + index)
66        }
67        .width('100%')
68        .height('100%')
69        .padding({ top: 8, left: 12, right: 12 })
70      } else {
71        EmptyPage()
72      }
73    }
74    .backgroundColor($r('sys.color.ohos_id_color_sub_background'))
75  }
76}