ionic-framework/ionic/components/checkbox/checkbox.js

import {ElementRef} from 'angular2/angular2'

import {Component, Directive} from 'angular2/src/core/annotations_impl/annotations';
import {Ancestor} from 'angular2/src/core/annotations_impl/visibility';
import {View} from 'angular2/src/core/annotations_impl/view';

import {ControlGroup, ControlDirective} from 'angular2/forms'
import {IonicComponent} from 'ionic/config/component'


@Component({
  selector: 'ion-checkbox',
  properties: [
    'checked'
  ],
  hostListeners: {
    '^click': 'onClick($event)'
  }
})
@View({
  template: `
  <div class="item-media media-checkbox">
    <icon class="checkbox-off"></icon>
    <icon class="checkbox-on"></icon>
  </div>

  <div class="item-content">

    <div class="item-label">
      <content></content>
    </div>

  </div>`
})
export class Checkbox {
  constructor(
    elementRef: ElementRef,
    cd: ControlDirective
    // @PropertySetter('attr.role') setAriaRole: Function,
    // @PropertySetter('attr.aria-checked') setAriaChecked: Function,
    // @PropertySetter('attr.aria-invalid') setAriaInvalid: Function,
    // @PropertySetter('attr.aria-disabled') setAriaDisabled: Function
  ) {
    this.domElement = elementRef.domElement
    this.domElement.classList.add('item')
    this.controlDirective = cd;
    cd.valueAccessor = this;

    let setAriaRole = (v) => this.domElement.setAttribute('aria-role', v)
    let setAriaChecked = (v) => this.domElement.setAttribute('aria-checked', v)
    let setAriaInvalid = (v) => this.domElement.setAttribute('aria-invalid', v)
    let setAriaDisabled = (v) => this.domElement.setAttribute('aria-disabled', v)

    this.config = Checkbox.config.invoke(this);

    setAriaRole('checkbox')
    setAriaInvalid('false')
    setAriaDisabled('false')

    this.setAriaRole = setAriaRole
    this.setAriaChecked = setAriaChecked
    this.setAriaInvalid = setAriaInvalid
    this.setAriaDisabled = setAriaDisabled

    this.setCheckedProperty = setAriaChecked

    // TODO: This is a hack and not a very good one at that
    this.domElement.querySelector('.checkbox-off').classList.add(this.config.properties.iconOff.defaults.ios);
    this.domElement.querySelector('.checkbox-on').classList.add(this.config.properties.iconOn.defaults.ios);
  }

  /**
   * Much like ngModel, this is called from our valueAccessor for the attached
   * ControlDirective to update the value internally.
   */
  writeValue(value) {
    // Convert it to a boolean
    this.checked = !!value;
  }

  set checked(checked) {
    this._checked = checked
    this.setCheckedProperty(checked)
    this.controlDirective._control().updateValue(this._checked);
  }
  get checked() {
    return this._checked
  }
  onClick() {
    this.checked = !this.checked;
  }
}

new IonicComponent(Checkbox, {
  properties: {
    iconOff: {
      defaults: {
        ios: 'ion-ios-circle-outline',
        android: 'ion-android-checkbox-outline-blank',
        core: 'ion-android-checkbox-outline-blank'
      }
    },
    iconOn: {
      defaults: {
        ios: 'ion-ios-checkmark',
        android: 'ion-android-checkbox',
        core: 'ion-android-checkbox',
      }
    }
  }
})