Copybara | 854996b | 2021-09-07 19:36:02 +0000 | [diff] [blame] | 1 | // Copyright 2019 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | import {LitElement, html, css} from 'lit-element'; |
| 6 | import {equalsIgnoreCase} from 'shared/helpers.js'; |
| 7 | |
| 8 | /** |
| 9 | * `<mr-grid-dropdown>` |
| 10 | * |
| 11 | * Component used by the user to select what grid options to use. |
| 12 | */ |
| 13 | export class MrGridDropdown extends LitElement { |
| 14 | /** @override */ |
| 15 | render() { |
| 16 | return html` |
| 17 | ${this.text}: |
| 18 | <select |
| 19 | class="drop-down" |
| 20 | @change=${this._optionChanged} |
| 21 | > |
| 22 | ${(this.items).map((item) => html` |
| 23 | <option .selected=${equalsIgnoreCase(item, this.selection)}> |
| 24 | ${item} |
| 25 | </option> |
| 26 | `)} |
| 27 | </select> |
| 28 | `; |
| 29 | } |
| 30 | |
| 31 | /** @override */ |
| 32 | static get properties() { |
| 33 | return { |
| 34 | text: {type: String}, |
| 35 | items: {type: Array}, |
| 36 | selection: {type: String}, |
| 37 | }; |
| 38 | }; |
| 39 | |
| 40 | /** @override */ |
| 41 | constructor() { |
| 42 | super(); |
| 43 | this.items = []; |
| 44 | this.selection = 'None'; |
| 45 | }; |
| 46 | |
| 47 | /** @override */ |
| 48 | static get styles() { |
| 49 | return css` |
| 50 | :host { |
| 51 | font-size: var(--chops-large-font-size); |
| 52 | } |
| 53 | .drop-down { |
| 54 | font-size: var(--chops-large-font-size); |
| 55 | } |
| 56 | `; |
| 57 | }; |
| 58 | |
| 59 | /** |
| 60 | * Syncs values when the user updates their selection. |
| 61 | * @param {Event} e |
| 62 | * @fires CustomEvent#change |
| 63 | * @private |
| 64 | */ |
| 65 | _optionChanged(e) { |
| 66 | this.selection = e.target.value; |
| 67 | this.dispatchEvent(new CustomEvent('change')); |
| 68 | }; |
| 69 | }; |
| 70 | |
| 71 | customElements.define('mr-grid-dropdown', MrGridDropdown); |
| 72 | |