| <!-- |
| @license |
| Copyright (c) 2015 The Polymer Project Authors. All rights reserved. |
| This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt |
| The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt |
| The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt |
| Code distributed by Google as part of the polymer project is also |
| subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt |
| --> |
| |
| <link rel="import" href="../polymer/polymer.html"> |
| <link rel="import" href="../paper-behaviors/paper-checked-element-behavior.html"> |
| <link rel="import" href="../paper-styles/default-theme.html"> |
| <link rel="import" href="../iron-flex-layout/iron-flex-layout.html"> |
| |
| <!-- |
| Material design: [Radio button](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-radio-button) |
| |
| `paper-radio-button` is a button that can be either checked or unchecked. |
| User can tap the radio button to check or uncheck it. |
| |
| Use a `<paper-radio-group>` to group a set of radio buttons. When radio buttons |
| are inside a radio group, exactly one radio button in the group can be checked |
| at any time. |
| |
| Example: |
| |
| <paper-radio-button></paper-radio-button> |
| <paper-radio-button>Item label</paper-radio-button> |
| |
| ### Styling |
| |
| The following custom properties and mixins are available for styling: |
| |
| Custom property | Description | Default |
| ----------------|-------------|---------- |
| `--paper-radio-button-unchecked-background-color` | Radio button background color when the input is not checked | `transparent` |
| `--paper-radio-button-unchecked-color` | Radio button color when the input is not checked | `--primary-text-color` |
| `--paper-radio-button-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--primary-text-color` |
| `--paper-radio-button-checked-color` | Radio button color when the input is checked | `--primary-color` |
| `--paper-radio-button-checked-ink-color` | Selected/focus ripple color when the input is checked | `--primary-color` |
| `--paper-radio-button-size` | Size of the radio button | `16px` |
| `--paper-radio-button-ink-size` | Size of the ripple | `48px` |
| `--paper-radio-button-label-color` | Label color | `--primary-text-color` |
| `--paper-radio-button-label-spacing` | Spacing between the label and the button | `10px` |
| `--paper-radio-button-radio-container` | A mixin applied to the internal radio container | `{}` |
| `--paper-radio-button-label` | A mixin applied to the internal label | `{}` |
| `--paper-radio-button-label-checked` | A mixin applied to the internal label when the radio button is checked | `{}` |
| |
| This element applies the mixin `--paper-font-common-base` but does not import `paper-styles/typography.html`. |
| In order to apply the `Roboto` font to this element, make sure you've imported `paper-styles/typography.html`. |
| |
| @group Paper Elements |
| @element paper-radio-button |
| @hero hero.svg |
| @demo demo/index.html |
| --> |
| |
| <dom-module id="paper-radio-button"> |
| <template strip-whitespace> |
| <style> |
| :host { |
| display: inline-block; |
| line-height: 0; |
| white-space: nowrap; |
| cursor: pointer; |
| @apply(--paper-font-common-base); |
| --calculated-paper-radio-button-size: var(--paper-radio-button-size, 16px); |
| /* -1px is a sentinel for the default and is replace in `attached`. */ |
| --calculated-paper-radio-button-ink-size: var(--paper-radio-button-ink-size, -1px); |
| } |
| |
| :host(:focus) { |
| outline: none; |
| } |
| |
| #radioContainer { |
| @apply(--layout-inline); |
| @apply(--layout-center-center); |
| position: relative; |
| width: var(--calculated-paper-radio-button-size); |
| height: var(--calculated-paper-radio-button-size); |
| vertical-align: middle; |
| |
| @apply(--paper-radio-button-radio-container); |
| } |
| |
| #ink { |
| position: absolute; |
| top: 50%; |
| left: 50%; |
| right: auto; |
| width: var(--calculated-paper-radio-button-ink-size); |
| height: var(--calculated-paper-radio-button-ink-size); |
| color: var(--paper-radio-button-unchecked-ink-color, --primary-text-color); |
| opacity: 0.6; |
| pointer-events: none; |
| -webkit-transform: translate(-50%, -50%); |
| transform: translate(-50%, -50%); |
| } |
| |
| #ink[checked] { |
| color: var(--paper-radio-button-checked-ink-color, --primary-color); |
| } |
| |
| #offRadio, #onRadio { |
| position: absolute; |
| box-sizing: border-box; |
| top: 0; |
| left: 0; |
| width: 100%; |
| height: 100%; |
| border-radius: 50%; |
| } |
| |
| #offRadio { |
| border: 2px solid var(--paper-radio-button-unchecked-color, --primary-text-color); |
| background-color: var(--paper-radio-button-unchecked-background-color, transparent); |
| transition: border-color 0.28s; |
| } |
| |
| #onRadio { |
| background-color: var(--paper-radio-button-checked-color, --primary-color); |
| -webkit-transform: scale(0); |
| transform: scale(0); |
| transition: -webkit-transform ease 0.28s; |
| transition: transform ease 0.28s; |
| will-change: transform; |
| } |
| |
| :host([checked]) #offRadio { |
| border-color: var(--paper-radio-button-checked-color, --primary-color); |
| } |
| |
| :host([checked]) #onRadio { |
| -webkit-transform: scale(0.5); |
| transform: scale(0.5); |
| } |
| |
| #radioLabel { |
| line-height: normal; |
| position: relative; |
| display: inline-block; |
| vertical-align: middle; |
| margin-left: var(--paper-radio-button-label-spacing, 10px); |
| white-space: normal; |
| color: var(--paper-radio-button-label-color, --primary-text-color); |
| |
| @apply(--paper-radio-button-label); |
| } |
| |
| :host([checked]) #radioLabel { |
| @apply(--paper-radio-button-label-checked); |
| } |
| |
| :host-context([dir="rtl"]) #radioLabel { |
| margin-left: 0; |
| margin-right: var(--paper-radio-button-label-spacing, 10px); |
| } |
| |
| #radioLabel[hidden] { |
| display: none; |
| } |
| |
| /* disabled state */ |
| |
| :host([disabled]) #offRadio { |
| border-color: var(--paper-radio-button-unchecked-color, --primary-text-color); |
| opacity: 0.5; |
| } |
| |
| :host([disabled][checked]) #onRadio { |
| background-color: var(--paper-radio-button-unchecked-color, --primary-text-color); |
| opacity: 0.5; |
| } |
| |
| :host([disabled]) #radioLabel { |
| /* slightly darker than the button, so that it's readable */ |
| opacity: 0.65; |
| } |
| </style> |
| |
| <div id="radioContainer"> |
| <div id="offRadio"></div> |
| <div id="onRadio"></div> |
| </div> |
| |
| <div id="radioLabel"><content></content></div> |
| </template> |
| |
| <script> |
| Polymer({ |
| is: 'paper-radio-button', |
| |
| behaviors: [ |
| Polymer.PaperCheckedElementBehavior |
| ], |
| |
| hostAttributes: { |
| role: 'radio', |
| 'aria-checked': false, |
| tabindex: 0 |
| }, |
| |
| properties: { |
| /** |
| * Fired when the checked state changes due to user interaction. |
| * |
| * @event change |
| */ |
| |
| /** |
| * Fired when the checked state changes. |
| * |
| * @event iron-change |
| */ |
| |
| ariaActiveAttribute: { |
| type: String, |
| value: 'aria-checked' |
| } |
| }, |
| |
| ready: function() { |
| this._rippleContainer = this.$.radioContainer; |
| }, |
| |
| attached: function() { |
| var inkSize = this.getComputedStyleValue('--calculated-paper-radio-button-ink-size').trim(); |
| // If unset, compute and set the default `--paper-radio-button-ink-size`. |
| if (inkSize === '-1px') { |
| var size = parseFloat(this.getComputedStyleValue('--calculated-paper-radio-button-size').trim()); |
| var defaultInkSize = Math.floor(3 * size); |
| |
| // The button and ripple need to have the same parity so that their |
| // centers align. |
| if (defaultInkSize % 2 !== size % 2) { |
| defaultInkSize++; |
| } |
| |
| this.customStyle['--paper-radio-button-ink-size'] = defaultInkSize + 'px'; |
| this.updateStyles(); |
| } |
| }, |
| }) |
| </script> |
| </dom-module> |