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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="../paper-styles/color.html">
<link rel="import" href="../paper-styles/default-theme.html">
<link rel="import" href="../paper-ripple/paper-ripple.html">
<link rel="import" href="../paper-behaviors/paper-inky-focus-behavior.html">
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<link rel="import" href="../iron-checked-element-behavior/iron-checked-element-behavior.html">
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<!--
`paper-toggle-button` provides a ON/OFF switch that user can toggle the state
by tapping or by dragging the switch.
Example:
<paper-toggle-button></paper-toggle-button>
### Styling
The following custom properties and mixins are available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--paper-toggle-button-unchecked-bar-color` | Slider color when the input is not checked | `#000000`
`--paper-toggle-button-unchecked-button-color` | Button color when the input is not checked | `--paper-grey-50`
`--paper-toggle-button-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--dark-primary-color`
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`--paper-toggle-button-checked-bar-color` | Slider button color when the input is checked | `--default-primary-color`
`--paper-toggle-button-checked-button-color` | Button color when the input is checked | `--default-primary-color`
`--paper-toggle-button-checked-ink-color` | Selected/focus ripple color when the input is checked | `--default-primary-color`
`--paper-toggle-button-unchecked-bar` | Mixin applied to the slider when the input is not checked | `{}`
`--paper-toggle-button-unchecked-button` | Mixin applied to the slider button when the input is not checked | `{}`
`--paper-toggle-button-checked-bar` | Mixin applied to the slider when the input is checked | `{}`
`--paper-toggle-button-checked-button` | Mixin applied to the slider button when the input is checked | `{}`
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@group Paper Elements
@element paper-toggle-button
@hero hero.svg
@demo demo/index.html
-->
<dom-module id="paper-toggle-button">
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<template>
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<style>
:host {
display: inline-block;
}
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:host([disabled]) {
pointer-events: none;
}
:host(:focus) {
outline:none;
}
.toggle-bar {
position: absolute;
height: 100%;
width: 100%;
border-radius: 8px;
pointer-events: none;
opacity: 0.4;
transition: background-color linear .08s;
background-color: var(--paper-toggle-button-unchecked-bar-color, #000000);
@apply(--paper-toggle-button-unchecked-bar);
}
.toggle-button {
position: absolute;
top: -3px;
height: 20px;
width: 20px;
border-radius: 50%;
box-shadow: 0 1px 5px 0 rgba(0, 0, 0, 0.6);
transition: -webkit-transform linear .08s, background-color linear .08s;
transition: transform linear .08s, background-color linear .08s;
will-change: transform;
background-color: var(--paper-toggle-button-unchecked-button-color, --paper-grey-50);
@apply(--paper-toggle-button-unchecked-button);
}
.toggle-button.dragging {
-webkit-transition: none;
transition: none;
}
:host([checked]):not([disabled]) .toggle-bar {
opacity: 0.5;
background-color: var(--paper-toggle-button-checked-bar-color, --default-primary-color);
@apply(--paper-toggle-button-checked-bar);
}
:host([disabled]) .toggle-bar {
background-color: #000;
opacity: 0.12;
}
:host([checked]) .toggle-button {
-webkit-transform: translate(16px, 0);
transform: translate(16px, 0);
}
:host([checked]):not([disabled]) .toggle-button {
background-color: var(--paper-toggle-button-checked-button-color, --default-primary-color);
@apply(--paper-toggle-button-checked-button);
}
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:host([disabled]) .toggle-button {
background-color: #bdbdbd;
opacity: 1;
}
.toggle-ink {
position: absolute;
top: -14px;
left: -14px;
width: 48px;
height: 48px;
opacity: 0.5;
pointer-events: none;
color: var(--paper-toggle-button-unchecked-ink-color, --primary-text-color);
}
:host([checked]) .toggle-ink {
color: var(--paper-toggle-button-checked-ink-color, --default-primary-color);
}
.toggle-container {
position: relative;
width: 36px;
height: 14px;
}
</style>
<div class="toggle-container">
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<div id="toggleBar" class="toggle-bar"></div>
<div id="toggleButton" class="toggle-button">
<paper-ripple id="ink" class="toggle-ink circle" recenters></paper-ripple>
</div>
</div>
</template>
<script>
Polymer({
is: 'paper-toggle-button',
behaviors: [
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Polymer.PaperInkyFocusBehavior,
Polymer.IronCheckedElementBehavior
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],
hostAttributes: {
role: 'button',
'aria-pressed': '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
*/
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},
listeners: {
track: '_ontrack'
},
ready: function() {
this._isReady = true;
},
// button-behavior hook
_buttonStateChanged: function() {
if (this.disabled) {
return;
}
if (this._isReady) {
this.checked = this.active;
}
},
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_ontrack: function(event) {
var track = event.detail;
if (track.state === 'start') {
this._trackStart(track);
} else if (track.state === 'track') {
this._trackMove(track);
} else if (track.state === 'end') {
this._trackEnd(track);
}
},
_trackStart: function(track) {
this._width = this.$.toggleBar.offsetWidth / 2;
/*
* keep an track-only check state to keep the dragging behavior smooth
* while toggling activations
*/
this._trackChecked = this.checked;
this.$.toggleButton.classList.add('dragging');
},
_trackMove: function(track) {
var dx = track.dx;
this._x = Math.min(this._width,
Math.max(0, this._trackChecked ? this._width + dx : dx));
this.translate3d(this._x + 'px', 0, 0, this.$.toggleButton);
this._userActivate(this._x > (this._width / 2));
},
_trackEnd: function(track) {
this.$.toggleButton.classList.remove('dragging');
this.transform('', this.$.toggleButton);
}
});
</script>
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</dom-module>
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