blob: 957439135c873cb2f9349dcb1d927f6d12072865 [file] [log] [blame] [edit]
/**
* @license
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import '../../../scripts/bundled-polymer.js';
import {GestureEventListeners} from '@polymer/polymer/lib/mixins/gesture-event-listeners.js';
import {LegacyElementMixin} from '@polymer/polymer/lib/legacy/legacy-element-mixin.js';
import {PolymerElement} from '@polymer/polymer/polymer-element.js';
/** @extends Polymer.Element */
class GrEndpointParam extends GestureEventListeners(
LegacyElementMixin(
PolymerElement)) {
static get is() { return 'gr-endpoint-param'; }
static get properties() {
return {
name: String,
value: {
type: Object,
notify: true,
observer: '_valueChanged',
},
};
}
_valueChanged(newValue, oldValue) {
/* In polymer 2 the following change was made:
"Property change notifications (property-changed events) aren't fired when
the value changes as a result of a binding from the host"
(see https://polymer-library.polymer-project.org/2.0/docs/about_20).
To workaround this problem, we fire the event from the observer.
In some cases this fire the event twice, but our code is
ready for it.
*/
const detail = {
value: newValue,
};
this.dispatchEvent(new CustomEvent('value-changed', {detail}));
}
}
customElements.define(GrEndpointParam.is, GrEndpointParam);