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<!--
@license
Copyright (c) 2018 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-ripple-behavior.html">
<!--
This is a lighter version of `paper-icon-button`. Its goal is performance, not
developer ergonomics, so as a result it has fewer features than `paper-icon-button`
itself. To use it, you must distribute a `button` containing the `iron-icon` you
want to use:
<link rel="import" href="../iron-icon/iron-icon.html">
<link rel="import" href="../paper-icon-button/paper-icon-button-light.html">
<link rel="import" href="../iron-icons/iron-icons.html">
<paper-icon-button-light>
<button title="heart">
<iron-icon icon="favorite"></iron-icon>
</button>
</paper-icon-button-light>
Note that this button is assumed to be distributed at the startup of
`paper-icon-button-light`. Dynamically adding a `button` to this element is
not supported.
The `title`/`disabled` etc. attributes go on the distributed button, not on the wrapper.
The following custom properties and mixins are also available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--paper-icon-button-light-ripple` | Mixin applied to the paper ripple | `{}`
@group Paper Elements
@element paper-icon-button-light
@demo demo/paper-icon-button-light.html
-->
<dom-module id="paper-icon-button-light">
<template strip-whitespace>
<style>
:host {
display: inline-block;
position: relative;
width: 24px;
height: 24px;
}
paper-ripple {
opacity: 0.6;
color: currentColor;
@apply(--paper-icon-button-light-ripple);
}
:host > ::slotted(button) {
position: relative;
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background: none;
border: none;
outline: none;
vertical-align: middle;
color: inherit;
cursor: pointer;
/* 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;
}
:host > ::slotted(button[disabled]) {
color: #9b9b9b;
pointer-events: none;
cursor: auto;
}
</style>
<slot></slot>
</template>
<script>
Polymer({
is: 'paper-icon-button-light',
behaviors: [
Polymer.PaperRippleBehavior
],
ready: function() {
Polymer.RenderStatus.afterNextRender(this, () => {
// Add lazy host listeners
this.addEventListener('down', this._rippleDown.bind(this));
this.addEventListener('up', this._rippleUp.bind(this));
// Assume the button has already been distributed.
var button = this.getEffectiveChildren()[0];
this._rippleContainer = button;
// We need to set the focus/blur listeners on the distributed button,
// not the host, since the host isn't focusable.
button.addEventListener('focus', this._rippleDown.bind(this));
button.addEventListener('blur', this._rippleUp.bind(this));
});
},
_rippleDown: function() {
this.getRipple().uiDownAction();
},
_rippleUp: function() {
this.getRipple().uiUpAction();
},
/**
* @param {...*} var_args
*/
ensureRipple: function(var_args) {
var lastRipple = this._ripple;
Polymer.PaperRippleBehavior.ensureRipple.apply(this, arguments);
if (this._ripple && this._ripple !== lastRipple) {
this._ripple.center = true;
this._ripple.classList.add('circle');
}
}
});
</script>
</dom-module>
|
