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