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