51 lines
1.6 KiB
TypeScript
51 lines
1.6 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Directive, ElementRef, Renderer2, forwardRef} from '@angular/core';
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import {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';
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export const CHECKBOX_VALUE_ACCESSOR: any = {
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provide: NG_VALUE_ACCESSOR,
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useExisting: forwardRef(() => CheckboxControlValueAccessor),
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multi: true,
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};
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/**
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* The accessor for writing a value and listening to changes on a checkbox input element.
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*
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* ### Example
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* ```
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* <input type="checkbox" name="rememberLogin" ngModel>
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* ```
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*
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* @stable
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*/
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@Directive({
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selector:
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'input[type=checkbox][formControlName],input[type=checkbox][formControl],input[type=checkbox][ngModel]',
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host: {'(change)': 'onChange($event.target.checked)', '(blur)': 'onTouched()'},
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providers: [CHECKBOX_VALUE_ACCESSOR]
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})
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export class CheckboxControlValueAccessor implements ControlValueAccessor {
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onChange = (_: any) => {};
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onTouched = () => {};
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constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}
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writeValue(value: any): void {
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this._renderer.setProperty(this._elementRef.nativeElement, 'checked', value);
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}
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registerOnChange(fn: (_: any) => {}): void { this.onChange = fn; }
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registerOnTouched(fn: () => {}): void { this.onTouched = fn; }
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setDisabledState(isDisabled: boolean): void {
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this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);
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}
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}
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