paper-progress.html
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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/paper-styles.html">
<link rel="import" href="../iron-range-behavior/iron-range-behavior.html">
<link rel="import" href="../iron-flex-layout/classes/iron-flex-layout.html">
<!--
The progress bars are for situations where the percentage completed can be
determined. They give users a quick sense of how much longer an operation
will take.
Example:
<paper-progress value="10"></paper-progress>
There is also a secondary progress which is useful for displaying intermediate
progress, such as the buffer level during a streaming playback progress bar.
Example:
<paper-progress value="10" secondary-progress="30"></paper-progress>
### Styling progress bar:
To change the active progress bar color:
paper-progress {
--paper-progress-active-color: #e91e63;
}
To change the secondary progress bar color:
paper-progress {
--paper-progress-secondary-color: #f8bbd0;
}
To change the progress bar background color:
paper-progress {
--paper-progress-container-color: #64ffda;
}
Add the class `transiting` to a paper-progress to animate the progress bar when
the value changed. You can also customize the transition:
paper-progress {
--paper-progress-transition-duration: 0.08s;
--paper-progress-transition-timing-function: ease;
--paper-progress-transition-transition-delay: 0s;
}
@group Paper Elements
@element paper-progress
@hero hero.svg
@demo demo/index.html
-->
<dom-module id="paper-progress">
<style>
:host {
display: inline-block;
width: 200px;
height: 4px;
}
:host(.transiting) #activeProgress,
:host(.transiting) #secondaryProgress {
-webkit-transition-property: -webkit-transform;
transition-property: transform;
/* Duration */
-webkit-transition-duration: var(--paper-progress-transition-duration, 0.08s);
transition-duration: var(--paper-progress-transition-duration, 0.08s);
/* Timing function */
-webkit-transition-timing-function: var(--paper-progress-transition-timing-function, ease);
transition-timing-function: var(--paper-progress-transition-timing-function, ease);
/* Delay */
-webkit-transition-delay: var(--paper-progress-transition-delay, 0s);
transition-delay: var(--paper-progress-transition-delay, 0s);
}
#progressContainer {
position: relative;
height: 100%;
background-color: var(--paper-progress-container-color, --google-grey-300);
overflow: hidden;
}
#activeProgress,
#secondaryProgress {
-webkit-transform-origin: left center;
transform-origin: left center;
-webkit-transform: scaleX(0);
transform: scaleX(0);
}
#activeProgress {
background-color: var(--paper-progress-active-color, --google-green-500);
}
#secondaryProgress {
background-color: var(--paper-progress-secondary-color, --google-green-100);
}
#activeProgress.indeterminate {
-webkit-transform-origin: center center;
transform-origin: center center;
-webkit-animation: indeterminate-bar 1s linear infinite;
animation: indeterminate-bar 1s linear infinite;
}
@-webkit-keyframes indeterminate-bar {
0% {
-webkit-transform: translate(-50%) scaleX(0);
}
50% {
-webkit-transform: translate(0%) scaleX(0.3);
}
100% {
-webkit-transform: translate(50%) scaleX(0);
}
}
@keyframes indeterminate-bar {
0% {
transform: translate(-50%) scaleX(0);
}
50% {
transform: translate(0%) scaleX(0.3);
}
100% {
transform: translate(50%) scaleX(0);
}
}
</style>
<template>
<div id="progressContainer" role="progressbar" aria-valuenow$="{{value}}" aria-valuemin$="{{min}}" aria-valuemax$="{{max}}">
<div id="secondaryProgress" class="fit"></div>
<div id="activeProgress" class="fit"></div>
</div>
</template>
</dom-module>
<script>
Polymer({
is: 'paper-progress',
behaviors: [
Polymer.IronRangeBehavior
],
properties: {
/**
* The number that represents the current secondary progress.
*/
secondaryProgress: {
type: Number,
value: 0,
notify: true
},
/**
* The secondary ratio
*/
secondaryRatio: {
type: Number,
value: 0,
readOnly: true,
observer: '_secondaryRatioChanged'
},
/**
* Use an indeterminate progress indicator.
*/
indeterminate: {
type: Boolean,
value: false,
notify: true,
observer: '_toggleIndeterminate'
}
},
observers: [
'_ratioChanged(ratio)',
'_secondaryProgressChanged(secondaryProgress, min, max)'
],
_toggleIndeterminate: function() {
// If we use attribute/class binding, the animation sometimes doesn't translate properly
// on Safari 7.1. So instead, we toggle the class here in the update method.
this.toggleClass('indeterminate', this.indeterminate, this.$.activeProgress);
},
_transformProgress: function(progress, ratio) {
var transform = 'scaleX(' + (ratio / 100) + ')';
progress.style.transform = progress.style.webkitTransform = transform;
},
_ratioChanged: function(ratio) {
this._transformProgress(this.$.activeProgress, ratio);
},
_secondaryRatioChanged: function(secondaryRatio) {
this._transformProgress(this.$.secondaryProgress, secondaryRatio);
},
_secondaryProgressChanged: function() {
this.secondaryProgress = this._clampValue(this.secondaryProgress);
this._setSecondaryRatio(this._calcRatio(this.secondaryProgress) * 100);
}
});
</script>