177 lines
5.2 KiB
HTML
177 lines
5.2 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="../iron-icon/iron-icon.html">
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<link rel="import" href="../paper-behaviors/paper-inky-focus-behavior.html">
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<link rel="import" href="../paper-styles/default-theme.html">
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<!--
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Material design: [Icon toggles](https://www.google.com/design/spec/components/buttons.html#buttons-toggle-buttons)
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`paper-icon-button` is a button with an image placed at the center. When the user touches
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the button, a ripple effect emanates from the center of the button.
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`paper-icon-button` includes a default icon set. Use `icon` to specify which icon
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from the icon set to use.
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<paper-icon-button icon="menu"></paper-icon-button>
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See [`iron-iconset`](iron-iconset) for more information about
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how to use a custom icon set.
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Example:
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<link href="path/to/iron-icons/iron-icons.html" rel="import">
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<paper-icon-button icon="favorite"></paper-icon-button>
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<paper-icon-button src="star.png"></paper-icon-button>
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To use `paper-icon-button` as a link, wrap it in an anchor tag. Since `paper-icon-button`
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will already receive focus, you may want to prevent the anchor tag from receiving focus
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as well by setting its tabindex to -1.
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<a href="https://www.polymer-project.org" tabindex="-1">
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<paper-icon-button icon="polymer"></paper-icon-button>
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</a>
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### Styling
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Style the button with CSS as you would a normal DOM element. If you are using the icons
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provided by `iron-icons`, they will inherit the foreground color of the button.
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/* make a red "favorite" button */
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<paper-icon-button icon="favorite" style="color: red;"></paper-icon-button>
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By default, the ripple is the same color as the foreground at 25% opacity. You may
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customize the color using the `--paper-icon-button-ink-color` custom property.
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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-icon-button-disabled-text` | The color of the disabled button | `--disabled-text-color`
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`--paper-icon-button-ink-color` | Selected/focus ripple color | `--primary-text-color`
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`--paper-icon-button` | Mixin for a button | `{}`
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`--paper-icon-button-disabled` | Mixin for a disabled button | `{}`
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`--paper-icon-button-hover` | Mixin for button on hover | `{}`
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@group Paper Elements
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@element paper-icon-button
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@demo demo/index.html
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-->
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<dom-module id="paper-icon-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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position: relative;
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padding: 8px;
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outline: none;
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-webkit-user-select: none;
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-moz-user-select: none;
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-ms-user-select: none;
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user-select: none;
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cursor: pointer;
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z-index: 0;
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line-height: 1;
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width: 40px;
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height: 40px;
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/* NOTE: Both values are needed, since some phones require the value to be `transparent`. */
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-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
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-webkit-tap-highlight-color: transparent;
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/* Because of polymer/2558, this style has lower specificity than * */
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box-sizing: border-box !important;
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@apply(--paper-icon-button);
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}
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:host #ink {
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color: var(--paper-icon-button-ink-color, --primary-text-color);
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opacity: 0.6;
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}
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:host([disabled]) {
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color: var(--paper-icon-button-disabled-text, --disabled-text-color);
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pointer-events: none;
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cursor: auto;
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@apply(--paper-icon-button-disabled);
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}
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:host(:hover) {
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@apply(--paper-icon-button-hover);
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}
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iron-icon {
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--iron-icon-width: 100%;
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--iron-icon-height: 100%;
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}
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</style>
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<iron-icon id="icon" src="[[src]]" icon="[[icon]]" alt$="[[alt]]"></iron-icon>
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</template>
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</dom-module>
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<script>
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Polymer({
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is: 'paper-icon-button',
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hostAttributes: {
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role: 'button',
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tabindex: '0'
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},
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behaviors: [
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Polymer.PaperInkyFocusBehavior
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],
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properties: {
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/**
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* The URL of an image for the icon. If the src property is specified,
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* the icon property should not be.
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*/
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src: {
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type: String
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},
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/**
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* Specifies the icon name or index in the set of icons available in
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* the icon's icon set. If the icon property is specified,
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* the src property should not be.
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*/
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icon: {
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type: String
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},
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/**
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* Specifies the alternate text for the button, for accessibility.
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*/
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alt: {
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type: String,
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observer: "_altChanged"
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}
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},
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_altChanged: function(newValue, oldValue) {
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var label = this.getAttribute('aria-label');
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// Don't stomp over a user-set aria-label.
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if (!label || oldValue == label) {
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this.setAttribute('aria-label', newValue);
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}
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}
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});
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</script>
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