ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
351 lines • 36.3 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { ChangeDetectionStrategy, Component, ElementRef, EventEmitter, Input, Output, ViewChild, ViewChildren, ViewEncapsulation } from '@angular/core';
import { fromEvent, merge, Observable } from 'rxjs';
import { startWith, switchMap } from 'rxjs/operators';
import { NzCheckboxComponent } from 'ng-zorro-antd/checkbox';
import * as i0 from "@angular/core";
import * as i1 from "@angular/common";
import * as i2 from "ng-zorro-antd/checkbox";
import * as i3 from "ng-zorro-antd/empty";
import * as i4 from "./transfer-search.component";
export class NzTransferListComponent {
// #endregion
constructor(ngZone, cdr) {
this.ngZone = ngZone;
this.cdr = cdr;
// #region fields
this.direction = 'left';
this.titleText = '';
this.showSelectAll = true;
this.dataSource = [];
this.itemUnit = '';
this.itemsUnit = '';
this.filter = '';
this.disabled = false;
this.renderList = null;
this.render = null;
this.footer = null;
// events
this.handleSelectAll = new EventEmitter();
this.handleSelect = new EventEmitter();
this.filterChange = new EventEmitter();
this.stat = {
checkAll: false,
checkHalf: false,
checkCount: 0,
shownCount: 0
};
this.onItemSelect = (item) => {
if (this.disabled || item.disabled) {
return;
}
item.checked = !item.checked;
this.updateCheckStatus();
this.handleSelect.emit(item);
};
this.onItemSelectAll = (status) => {
this.dataSource.forEach(item => {
if (!item.disabled && !item.hide) {
item.checked = status;
}
});
this.updateCheckStatus();
this.handleSelectAll.emit(status);
};
}
get validData() {
return this.dataSource.filter(w => !w.hide);
}
trackByHide(_index, item) {
// The `validData` is a getter which returns new array each time the property is read.
// This may lead to unexpected re-renders, tho the array hasn't been updated.
return item.hide;
}
updateCheckStatus() {
const validCount = this.dataSource.filter(w => !w.disabled).length;
this.stat.checkCount = this.dataSource.filter(w => w.checked && !w.disabled).length;
this.stat.shownCount = this.validData.length;
this.stat.checkAll = validCount > 0 && validCount === this.stat.checkCount;
this.stat.checkHalf = this.stat.checkCount > 0 && !this.stat.checkAll;
// Note: this is done explicitly since the internal `nzChecked` value may not be updated in edge cases.
// Consider the following flow:
// 1) the initial value of `stat.checkAll` is `false`
// 2) the user filters items
// 3) the user clicks "Select All" checkbox
// 4) the `NzCheckboxComponent` sets `nzChecked` to `true` internally
// 5) the user clicks "Move to right"
// 6) items are moved and the `updateCheckStatus` is invoked
// 7) the `stat.checkAll` value has never been updated in this flow, it's always been `false`
// 8) the `nzChecked` is still `true` and the checkbox is not unchecked
// This is because Angular checks bindings and it checked that `[nzChecked]="stat.checkAll"` has
// never been updated, so Angular did not set new `nzChecked` value on the checkbox.
this.headerCheckbox && (this.headerCheckbox.nzChecked = this.stat.checkAll);
}
// #endregion
// #region search
handleFilter(value) {
this.filter = value;
this.dataSource.forEach(item => {
item.hide = value.length > 0 && !this.matchFilter(value, item);
});
this.stat.shownCount = this.validData.length;
this.filterChange.emit({ direction: this.direction, value });
}
handleClear() {
this.handleFilter('');
}
matchFilter(text, item) {
if (this.filterOption) {
return this.filterOption(text, item);
}
return item.title.includes(text);
}
markForCheck() {
this.updateCheckStatus();
this.cdr.markForCheck();
}
ngAfterViewInit() {
this.checkboxes.changes
.pipe(startWith(this.checkboxes), switchMap(() => {
const checkboxes = this.checkboxes.toArray();
// Caretaker note: we explicitly should call `subscribe()` within the root zone.
// `runOutsideAngular(() => fromEvent(...))` will just create an observable within the root zone,
// but `addEventListener` is called when the `fromEvent` is subscribed.
return new Observable(subscriber => this.ngZone.runOutsideAngular(() => merge(...checkboxes.map(checkbox => fromEvent(checkbox.nativeElement, 'click'))).subscribe(subscriber)));
}))
.subscribe(event => {
event.stopPropagation();
});
}
}
NzTransferListComponent.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.1.0", ngImport: i0, type: NzTransferListComponent, deps: [{ token: i0.NgZone }, { token: i0.ChangeDetectorRef }], target: i0.ɵɵFactoryTarget.Component });
NzTransferListComponent.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "15.1.0", type: NzTransferListComponent, selector: "nz-transfer-list", inputs: { direction: "direction", titleText: "titleText", showSelectAll: "showSelectAll", dataSource: "dataSource", itemUnit: "itemUnit", itemsUnit: "itemsUnit", filter: "filter", disabled: "disabled", showSearch: "showSearch", searchPlaceholder: "searchPlaceholder", notFoundContent: "notFoundContent", filterOption: "filterOption", renderList: "renderList", render: "render", footer: "footer" }, outputs: { handleSelectAll: "handleSelectAll", handleSelect: "handleSelect", filterChange: "filterChange" }, host: { properties: { "class.ant-transfer-list-with-footer": "!!footer" }, classAttribute: "ant-transfer-list" }, viewQueries: [{ propertyName: "headerCheckbox", first: true, predicate: ["headerCheckbox"], descendants: true, read: NzCheckboxComponent }, { propertyName: "checkboxes", predicate: ["checkboxes"], descendants: true, read: ElementRef }], exportAs: ["nzTransferList"], ngImport: i0, template: `
<ng-template #defaultRenderList>
<ul *ngIf="stat.shownCount > 0" class="ant-transfer-list-content">
<li
*ngFor="let item of validData; trackBy: trackByHide"
(click)="onItemSelect(item)"
class="ant-transfer-list-content-item"
[ngClass]="{ 'ant-transfer-list-content-item-disabled': disabled || item.disabled }"
>
<label
#checkboxes
nz-checkbox
[nzChecked]="item.checked"
(nzCheckedChange)="onItemSelect(item)"
[nzDisabled]="disabled || item.disabled"
>
<ng-container *ngIf="!render; else renderContainer">{{ item.title }}</ng-container>
<ng-template
#renderContainer
[ngTemplateOutlet]="render"
[ngTemplateOutletContext]="{ $implicit: item }"
></ng-template>
</label>
</li>
</ul>
<div *ngIf="stat.shownCount === 0" class="ant-transfer-list-body-not-found">
<nz-embed-empty [nzComponentName]="'transfer'" [specificContent]="notFoundContent"></nz-embed-empty>
</div>
</ng-template>
<div class="ant-transfer-list-header">
<label
*ngIf="showSelectAll"
class="ant-transfer-list-checkbox"
nz-checkbox
#headerCheckbox
[nzChecked]="stat.checkAll"
(nzCheckedChange)="onItemSelectAll($event)"
[nzIndeterminate]="stat.checkHalf"
[nzDisabled]="stat.shownCount === 0 || disabled"
></label>
<span class="ant-transfer-list-header-selected">
<span>
{{ (stat.checkCount > 0 ? stat.checkCount + '/' : '') + stat.shownCount }}
{{ validData.length > 1 ? itemsUnit : itemUnit }}
</span>
</span>
<span *ngIf="titleText" class="ant-transfer-list-header-title">{{ titleText }}</span>
</div>
<div
class="{{ showSearch ? 'ant-transfer-list-body ant-transfer-list-body-with-search' : 'ant-transfer-list-body' }}"
[ngClass]="{ 'ant-transfer__nodata': stat.shownCount === 0 }"
>
<div *ngIf="showSearch" class="ant-transfer-list-body-search-wrapper">
<span
nz-transfer-search
class="ant-input-affix-wrapper ant-transfer-list-search"
(valueChanged)="handleFilter($event)"
(valueClear)="handleClear()"
[placeholder]="searchPlaceholder"
[disabled]="disabled"
[value]="filter"
></span>
</div>
<ng-container *ngIf="renderList; else defaultRenderList">
<div class="ant-transfer-list-body-customize-wrapper">
<ng-container
*ngTemplateOutlet="
renderList;
context: {
$implicit: validData,
direction: direction,
disabled: disabled,
onItemSelectAll: onItemSelectAll,
onItemSelect: onItemSelect,
stat: stat
}
"
></ng-container>
</div>
</ng-container>
</div>
<div *ngIf="footer" class="ant-transfer-list-footer">
<ng-template [ngTemplateOutlet]="footer" [ngTemplateOutletContext]="{ $implicit: direction }"></ng-template>
</div>
`, isInline: true, dependencies: [{ kind: "directive", type: i1.NgClass, selector: "[ngClass]", inputs: ["class", "ngClass"] }, { kind: "directive", type: i1.NgForOf, selector: "[ngFor][ngForOf]", inputs: ["ngForOf", "ngForTrackBy", "ngForTemplate"] }, { kind: "directive", type: i1.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }, { kind: "directive", type: i1.NgTemplateOutlet, selector: "[ngTemplateOutlet]", inputs: ["ngTemplateOutletContext", "ngTemplateOutlet", "ngTemplateOutletInjector"] }, { kind: "component", type: i2.NzCheckboxComponent, selector: "[nz-checkbox]", inputs: ["nzValue", "nzAutoFocus", "nzDisabled", "nzIndeterminate", "nzChecked", "nzId"], outputs: ["nzCheckedChange"], exportAs: ["nzCheckbox"] }, { kind: "component", type: i3.NzEmbedEmptyComponent, selector: "nz-embed-empty", inputs: ["nzComponentName", "specificContent"], exportAs: ["nzEmbedEmpty"] }, { kind: "component", type: i4.NzTransferSearchComponent, selector: "[nz-transfer-search]", inputs: ["placeholder", "value", "disabled"], outputs: ["valueChanged", "valueClear"], exportAs: ["nzTransferSearch"] }], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.1.0", ngImport: i0, type: NzTransferListComponent, decorators: [{
type: Component,
args: [{
selector: 'nz-transfer-list',
exportAs: 'nzTransferList',
preserveWhitespaces: false,
template: `
<ng-template #defaultRenderList>
<ul *ngIf="stat.shownCount > 0" class="ant-transfer-list-content">
<li
*ngFor="let item of validData; trackBy: trackByHide"
(click)="onItemSelect(item)"
class="ant-transfer-list-content-item"
[ngClass]="{ 'ant-transfer-list-content-item-disabled': disabled || item.disabled }"
>
<label
#checkboxes
nz-checkbox
[nzChecked]="item.checked"
(nzCheckedChange)="onItemSelect(item)"
[nzDisabled]="disabled || item.disabled"
>
<ng-container *ngIf="!render; else renderContainer">{{ item.title }}</ng-container>
<ng-template
#renderContainer
[ngTemplateOutlet]="render"
[ngTemplateOutletContext]="{ $implicit: item }"
></ng-template>
</label>
</li>
</ul>
<div *ngIf="stat.shownCount === 0" class="ant-transfer-list-body-not-found">
<nz-embed-empty [nzComponentName]="'transfer'" [specificContent]="notFoundContent"></nz-embed-empty>
</div>
</ng-template>
<div class="ant-transfer-list-header">
<label
*ngIf="showSelectAll"
class="ant-transfer-list-checkbox"
nz-checkbox
#headerCheckbox
[nzChecked]="stat.checkAll"
(nzCheckedChange)="onItemSelectAll($event)"
[nzIndeterminate]="stat.checkHalf"
[nzDisabled]="stat.shownCount === 0 || disabled"
></label>
<span class="ant-transfer-list-header-selected">
<span>
{{ (stat.checkCount > 0 ? stat.checkCount + '/' : '') + stat.shownCount }}
{{ validData.length > 1 ? itemsUnit : itemUnit }}
</span>
</span>
<span *ngIf="titleText" class="ant-transfer-list-header-title">{{ titleText }}</span>
</div>
<div
class="{{ showSearch ? 'ant-transfer-list-body ant-transfer-list-body-with-search' : 'ant-transfer-list-body' }}"
[ngClass]="{ 'ant-transfer__nodata': stat.shownCount === 0 }"
>
<div *ngIf="showSearch" class="ant-transfer-list-body-search-wrapper">
<span
nz-transfer-search
class="ant-input-affix-wrapper ant-transfer-list-search"
(valueChanged)="handleFilter($event)"
(valueClear)="handleClear()"
[placeholder]="searchPlaceholder"
[disabled]="disabled"
[value]="filter"
></span>
</div>
<ng-container *ngIf="renderList; else defaultRenderList">
<div class="ant-transfer-list-body-customize-wrapper">
<ng-container
*ngTemplateOutlet="
renderList;
context: {
$implicit: validData,
direction: direction,
disabled: disabled,
onItemSelectAll: onItemSelectAll,
onItemSelect: onItemSelect,
stat: stat
}
"
></ng-container>
</div>
</ng-container>
</div>
<div *ngIf="footer" class="ant-transfer-list-footer">
<ng-template [ngTemplateOutlet]="footer" [ngTemplateOutletContext]="{ $implicit: direction }"></ng-template>
</div>
`,
encapsulation: ViewEncapsulation.None,
changeDetection: ChangeDetectionStrategy.OnPush,
host: {
class: 'ant-transfer-list',
'[class.ant-transfer-list-with-footer]': '!!footer'
}
}]
}], ctorParameters: function () { return [{ type: i0.NgZone }, { type: i0.ChangeDetectorRef }]; }, propDecorators: { direction: [{
type: Input
}], titleText: [{
type: Input
}], showSelectAll: [{
type: Input
}], dataSource: [{
type: Input
}], itemUnit: [{
type: Input
}], itemsUnit: [{
type: Input
}], filter: [{
type: Input
}], disabled: [{
type: Input
}], showSearch: [{
type: Input
}], searchPlaceholder: [{
type: Input
}], notFoundContent: [{
type: Input
}], filterOption: [{
type: Input
}], renderList: [{
type: Input
}], render: [{
type: Input
}], footer: [{
type: Input
}], handleSelectAll: [{
type: Output
}], handleSelect: [{
type: Output
}], filterChange: [{
type: Output
}], headerCheckbox: [{
type: ViewChild,
args: ['headerCheckbox', { read: NzCheckboxComponent }]
}], checkboxes: [{
type: ViewChildren,
args: ['checkboxes', { read: ElementRef }]
}] } });
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* Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  EventEmitter,\n  Input,\n  NgZone,\n  Output,\n  QueryList,\n  TemplateRef,\n  ViewChild,\n  ViewChildren,\n  ViewEncapsulation\n} from '@angular/core';\nimport { fromEvent, merge, Observable } from 'rxjs';\nimport { startWith, switchMap } from 'rxjs/operators';\n\nimport { NzCheckboxComponent } from 'ng-zorro-antd/checkbox';\n\nimport { TransferDirection, TransferItem } from './interface';\n\n@Component({\n  selector: 'nz-transfer-list',\n  exportAs: 'nzTransferList',\n  preserveWhitespaces: false,\n  template: `\n    <ng-template #defaultRenderList>\n      <ul *ngIf=\"stat.shownCount > 0\" class=\"ant-transfer-list-content\">\n        <li\n          *ngFor=\"let item of validData; trackBy: trackByHide\"\n          (click)=\"onItemSelect(item)\"\n          class=\"ant-transfer-list-content-item\"\n          [ngClass]=\"{ 'ant-transfer-list-content-item-disabled': disabled || item.disabled }\"\n        >\n          <label\n            #checkboxes\n            nz-checkbox\n            [nzChecked]=\"item.checked\"\n            (nzCheckedChange)=\"onItemSelect(item)\"\n            [nzDisabled]=\"disabled || item.disabled\"\n          >\n            <ng-container *ngIf=\"!render; else renderContainer\">{{ item.title }}</ng-container>\n            <ng-template\n              #renderContainer\n              [ngTemplateOutlet]=\"render\"\n              [ngTemplateOutletContext]=\"{ $implicit: item }\"\n            ></ng-template>\n          </label>\n        </li>\n      </ul>\n      <div *ngIf=\"stat.shownCount === 0\" class=\"ant-transfer-list-body-not-found\">\n        <nz-embed-empty [nzComponentName]=\"'transfer'\" [specificContent]=\"notFoundContent\"></nz-embed-empty>\n      </div>\n    </ng-template>\n    <div class=\"ant-transfer-list-header\">\n      <label\n        *ngIf=\"showSelectAll\"\n        class=\"ant-transfer-list-checkbox\"\n        nz-checkbox\n        #headerCheckbox\n        [nzChecked]=\"stat.checkAll\"\n        (nzCheckedChange)=\"onItemSelectAll($event)\"\n        [nzIndeterminate]=\"stat.checkHalf\"\n        [nzDisabled]=\"stat.shownCount === 0 || disabled\"\n      ></label>\n      <span class=\"ant-transfer-list-header-selected\">\n        <span>\n          {{ (stat.checkCount > 0 ? stat.checkCount + '/' : '') + stat.shownCount }}\n          {{ validData.length > 1 ? itemsUnit : itemUnit }}\n        </span>\n      </span>\n      <span *ngIf=\"titleText\" class=\"ant-transfer-list-header-title\">{{ titleText }}</span>\n    </div>\n    <div\n      class=\"{{ showSearch ? 'ant-transfer-list-body ant-transfer-list-body-with-search' : 'ant-transfer-list-body' }}\"\n      [ngClass]=\"{ 'ant-transfer__nodata': stat.shownCount === 0 }\"\n    >\n      <div *ngIf=\"showSearch\" class=\"ant-transfer-list-body-search-wrapper\">\n        <span\n          nz-transfer-search\n          class=\"ant-input-affix-wrapper ant-transfer-list-search\"\n          (valueChanged)=\"handleFilter($event)\"\n          (valueClear)=\"handleClear()\"\n          [placeholder]=\"searchPlaceholder\"\n          [disabled]=\"disabled\"\n          [value]=\"filter\"\n        ></span>\n      </div>\n      <ng-container *ngIf=\"renderList; else defaultRenderList\">\n        <div class=\"ant-transfer-list-body-customize-wrapper\">\n          <ng-container\n            *ngTemplateOutlet=\"\n              renderList;\n              context: {\n                $implicit: validData,\n                direction: direction,\n                disabled: disabled,\n                onItemSelectAll: onItemSelectAll,\n                onItemSelect: onItemSelect,\n                stat: stat\n              }\n            \"\n          ></ng-container>\n        </div>\n      </ng-container>\n    </div>\n    <div *ngIf=\"footer\" class=\"ant-transfer-list-footer\">\n      <ng-template [ngTemplateOutlet]=\"footer\" [ngTemplateOutletContext]=\"{ $implicit: direction }\"></ng-template>\n    </div>\n  `,\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {\n    class: 'ant-transfer-list',\n    '[class.ant-transfer-list-with-footer]': '!!footer'\n  }\n})\nexport class NzTransferListComponent implements AfterViewInit {\n  // #region fields\n\n  @Input() direction: TransferDirection = 'left';\n  @Input() titleText = '';\n  @Input() showSelectAll = true;\n\n  @Input() dataSource: TransferItem[] = [];\n\n  @Input() itemUnit: string | undefined = '';\n  @Input() itemsUnit: string | undefined = '';\n  @Input() filter = '';\n  @Input() disabled: boolean = false;\n  @Input() showSearch?: boolean;\n  @Input() searchPlaceholder?: string;\n  @Input() notFoundContent?: string;\n  @Input() filterOption?: (inputValue: string, item: TransferItem) => boolean;\n\n  @Input() renderList: TemplateRef<void> | null = null;\n  @Input() render: TemplateRef<void> | null = null;\n  @Input() footer: TemplateRef<void> | null = null;\n\n  // events\n  @Output() readonly handleSelectAll: EventEmitter<boolean> = new EventEmitter<boolean>();\n  @Output() readonly handleSelect: EventEmitter<TransferItem> = new EventEmitter();\n  @Output() readonly filterChange: EventEmitter<{ direction: TransferDirection; value: string }> = new EventEmitter();\n\n  @ViewChild('headerCheckbox', { read: NzCheckboxComponent }) headerCheckbox?: NzCheckboxComponent;\n\n  @ViewChildren('checkboxes', { read: ElementRef }) checkboxes!: QueryList<ElementRef<HTMLLabelElement>>;\n\n  stat = {\n    checkAll: false,\n    checkHalf: false,\n    checkCount: 0,\n    shownCount: 0\n  };\n\n  get validData(): TransferItem[] {\n    return this.dataSource.filter(w => !w.hide);\n  }\n\n  trackByHide(_index: number, item: TransferItem): boolean | undefined {\n    // The `validData` is a getter which returns new array each time the property is read.\n    // This may lead to unexpected re-renders, tho the array hasn't been updated.\n    return item.hide;\n  }\n\n  onItemSelect = (item: TransferItem): void => {\n    if (this.disabled || item.disabled) {\n      return;\n    }\n    item.checked = !item.checked;\n    this.updateCheckStatus();\n    this.handleSelect.emit(item);\n  };\n\n  onItemSelectAll = (status: boolean): void => {\n    this.dataSource.forEach(item => {\n      if (!item.disabled && !item.hide) {\n        item.checked = status;\n      }\n    });\n\n    this.updateCheckStatus();\n    this.handleSelectAll.emit(status);\n  };\n\n  private updateCheckStatus(): void {\n    const validCount = this.dataSource.filter(w => !w.disabled).length;\n    this.stat.checkCount = this.dataSource.filter(w => w.checked && !w.disabled).length;\n    this.stat.shownCount = this.validData.length;\n    this.stat.checkAll = validCount > 0 && validCount === this.stat.checkCount;\n    this.stat.checkHalf = this.stat.checkCount > 0 && !this.stat.checkAll;\n    // Note: this is done explicitly since the internal `nzChecked` value may not be updated in edge cases.\n    // Consider the following flow:\n    // 1) the initial value of `stat.checkAll` is `false`\n    // 2) the user filters items\n    // 3) the user clicks \"Select All\" checkbox\n    // 4) the `NzCheckboxComponent` sets `nzChecked` to `true` internally\n    // 5) the user clicks \"Move to right\"\n    // 6) items are moved and the `updateCheckStatus` is invoked\n    // 7) the `stat.checkAll` value has never been updated in this flow, it's always been `false`\n    // 8) the `nzChecked` is still `true` and the checkbox is not unchecked\n    // This is because Angular checks bindings and it checked that `[nzChecked]=\"stat.checkAll\"` has\n    // never been updated, so Angular did not set new `nzChecked` value on the checkbox.\n    this.headerCheckbox && (this.headerCheckbox.nzChecked = this.stat.checkAll);\n  }\n\n  // #endregion\n\n  // #region search\n\n  handleFilter(value: string): void {\n    this.filter = value;\n    this.dataSource.forEach(item => {\n      item.hide = value.length > 0 && !this.matchFilter(value, item);\n    });\n    this.stat.shownCount = this.validData.length;\n    this.filterChange.emit({ direction: this.direction, value });\n  }\n\n  handleClear(): void {\n    this.handleFilter('');\n  }\n\n  private matchFilter(text: string, item: TransferItem): boolean {\n    if (this.filterOption) {\n      return this.filterOption(text, item);\n    }\n    return item.title.includes(text);\n  }\n\n  // #endregion\n\n  constructor(private ngZone: NgZone, private cdr: ChangeDetectorRef) {}\n\n  markForCheck(): void {\n    this.updateCheckStatus();\n    this.cdr.markForCheck();\n  }\n\n  ngAfterViewInit(): void {\n    this.checkboxes.changes\n      .pipe(\n        startWith(this.checkboxes),\n        switchMap(() => {\n          const checkboxes = this.checkboxes.toArray();\n          // Caretaker note: we explicitly should call `subscribe()` within the root zone.\n          // `runOutsideAngular(() => fromEvent(...))` will just create an observable within the root zone,\n          // but `addEventListener` is called when the `fromEvent` is subscribed.\n          return new Observable<MouseEvent>(subscriber =>\n            this.ngZone.runOutsideAngular(() =>\n              merge(...checkboxes.map(checkbox => fromEvent<MouseEvent>(checkbox.nativeElement, 'click'))).subscribe(\n                subscriber\n              )\n            )\n          );\n        })\n      )\n      .subscribe(event => {\n        event.stopPropagation();\n      });\n  }\n}\n"]}