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expandable-fab.html
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<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../paper-fab/paper-fab.html">
<link rel="import" href="../iron-icons/iron-icons.html">
<link rel="import" href="../iron-icons/social-icons.html">
<!--
WARNING: This component is relying on the web animation api. The poly fill is in the component dependencies, so you just have to include it in your index.html file.
Example:
```html
<script src="bower_components/web-animations-js/web-animations-next-lite.min.js"></script>
```
`expandable-fab` is a paper-fab that can expand into a drawer (android like).
Example:
```html
<expandable-fab
drawer-height="300"
drawer-width="200"
background-color="red"
orientation="top-left"
fab-icon="add"
fab-diameter="60">
<img class="item" src="icons/logo_docs_64px.png"/>
<img class="item" src="icons/logo_forms_64px.png"/>
<img class="item" src="icons/logo_gmail_64px.png"/>
<img class="item" src="icons/logo_google_plus_64px.png"/>
<img class="item" src="icons/logo_hangouts_64px.png"/>
<img class="item" src="icons/logo_slides_64px.png"/>
</expandable-fab>
```
You can style the items you are passing with a css class. If you want to change the way your content is displayed when the drawer is open,
use the --drawer-content-mixin to apply your rules. By default, the component is using flexbox
### Styling
The following custom properties and mixins are available for styling:
| Custom property | Description | Default |
| ----------------|-------------|---------- |
| `--drawer-content-mixin` | Mixin applied to the drawer content | `{}` |
@demo demo/index.html
-->
<dom-module id="expandable-fab">
<template>
<style is="custom-style">
:host {
display: block;
--element-background-color: var(--expandable-fab-background-color, red);
}
#container {
position: relative;
}
#fab {
background-color: var(--element-background-color);
will-change: transform;
--paper-fab-iron-icon: {
@apply(--expandable-fab-icon);
}
}
#drawer {
height:250px;
width: 200px;
background-color: rgba(0, 0, 0, 0);
border-radius: 2px;
position: absolute;
z-index: 10;
overflow: hidden;
display: none;
}
#drawerContent {
width: 100%;
height: 100%;
display: flex;
justify-content: space-around;
padding: 10px;
flex-wrap: wrap;
box-sizing: border-box;
overflow: hidden;
@apply(--drawer-content-mixin);
}
#drawerContent ::content .drawerItem{
@apply(--drawer-item-mixin);
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
#placeholder {
background-color: var(--element-background-color);
opacity: 0;
position: absolute;
will-change: transform;
border-radius: 50%;
}
</style>
<div id="container">
<div id="drawer">
<div id="placeholder"></div>
<div id="drawerContent">
<content id="content"></content>
</div>
</div>
<paper-fab id="fab" icon="[[fabIcon]]" noink on-tap="toDrawer"></paper-fab>
</div>
</template>
<script>
'use strict';
Polymer({
/**
* Fired on state change, detail is an object with a state property
*
* @event iron-state-changed
*/
is: 'expandable-fab',
properties: {
autoClose: {
type: Boolean,
value: false
},
items: Array,
orientation: {
type: String,
value: 'center'
},
backgroundColor: String,
drawerHeight: {
type: Number,
value: 250
},
drawerWidth: {
type: Number,
value: 200
},
fabIcon: {
type: String,
value: 'add'
},
fabDiameter: {
type: Number,
value: 56
},
state: {
type: String,
value: 'fab'
},
_fabTranslation: {
type: Object
},
_DRAWER_STATE: {
type: String,
value: 'drawer'
},
_FAB_STATE: {
type: String,
value: 'fab'
},
_ANIMATING_STATE: {
type: String,
value: 'animating'
},
_drawerAnimationSettings: {
type: Object,
value: {
duration: 250, //milliseconds
easing: 'ease-in-out', //'linear', a bezier curve, etc.
delay: 0, //milliseconds
iterations: 1, //or a number
direction: 'normal', //'normal', 'reverse', etc.
fill: 'forwards' //'backwards', 'both', 'none', 'auto'
}
},
_fabAnimationSettings: {
type: Object,
value: {
duration: 150, //milliseconds
easing: 'linear', //'linear', a bezier curve, etc.
delay: 0, //milliseconds
iterations: 1, //or a number
direction: 'normal', //'normal', 'reverse', etc.
fill: 'forwards' //'backwards', 'both', 'none', 'auto'
}
},
_fabScale: {
type: Array,
value: 1.2
},
_fabEffects: {
type: Object,
value: null
},
_rippleEffect: {
type: Array,
value: null
},
_contentEffects: {
type: Array,
value: null
}
},
attached: function() {
this.backgroundColor = this.getComputedStyleValue('--element-background-color');
},
ready: function(){
this._setupGeometry();
this._setupOrientation();
this._setupContent();
this._setAccessibility();
},
_cleanItems: function() {
var buffer = [];
this.items.forEach(function(child) {
if(child.nodeName !== '#text') buffer.push(child);
})
this.items = buffer;
},
_setupContent: function(){
var _this = this;
this.items = Polymer.dom(this.$.content).getDistributedNodes();
this._cleanItems();
this.items = (this.items.length) ? this.items : Array.from(this.$.drawerContent.children);
this.items.forEach(function(child){
child.classList.add('drawerItem');
if(_this.autoClose){
child.addEventListener('click', function(){
_this.toFab();
})
}
child.addEventListener('keydown', function($event){
if($event.keyCode === 13) child.dispatchEvent(new Event('click'));
})
});
document.addEventListener('click', function($event){
var path = $event.path || $event._path;
if(~path.indexOf(_this)) return;
var target = $event.target;
if(target === document.body) return _this.toFab();
do {
if(target === _this) return false;
target = target.parentNode;
} while (target !== document.body);
return _this.toFab();
})
var closeEl = this.querySelector('[close]');
if(closeEl) {
closeEl.addEventListener('click', function() {
_this.toFab();
});
}
},
_setupGeometry: function(){
this.$.drawer.style.height = this.drawerHeight+'px';
this.$.drawer.style.width = this.drawerWidth+'px';
this.$.fab.style.height = this.fabDiameter+'px';
this.$.fab.style.width = this.fabDiameter+'px';
this.$.placeholder.style.height = (this.fabDiameter * this._fabScale)+'px';
this.$.placeholder.style.width = (this.fabDiameter * this._fabScale)+'px';
},
_setupOrientation: function(){
var _this = this;
this._fabTranslation = {x: 0, y: 0};
var splitted = this.orientation.split('-');
if(splitted.length > 2) return console.error(this.orientation+' is not valid, only two direction are allowed at max, eg: top-left');
splitted.forEach(function(direction){
switch(direction){
case 'top':
_this.$.drawer.style.top = '-'+(_this.drawerHeight - _this.fabDiameter / 2)+'px';
_this.$.placeholder.style.top = '100%';
var scaledDiameter = _this.fabDiameter * _this._fabScale;
_this.$.placeholder.style.marginTop = '-'+scaledDiameter+'px';
_this._fabTranslation.y = _this.fabDiameter / 2 * -1;
if(splitted.indexOf('right') === -1 && splitted.indexOf('left') === -1){
_this.$.drawer.style.left = '-'+( (_this.drawerWidth - _this.fabDiameter) / 2)+'px';
_this.$.placeholder.style.left = '50%';
_this.$.placeholder.style.marginLeft = '-'+(scaledDiameter / 2)+'px';
}
break;
case 'bottom':
_this.$.drawer.style.top = (_this.fabDiameter / 2)+'px';
var scaledDiameter = _this.fabDiameter * _this._fabScale;
_this.$.placeholder.style.top = scaledDiameter+'px';
_this.$.placeholder.style.marginTop = '-'+scaledDiameter+'px'
_this._fabTranslation.y = _this.fabDiameter / 2;
if(splitted.indexOf('right') === -1 && splitted.indexOf('left') === -1){
_this.$.drawer.style.left = '-'+( (_this.drawerWidth - _this.fabDiameter) / 2)+'px';
_this.$.placeholder.style.left = '50%';
_this.$.placeholder.style.marginLeft = '-'+(scaledDiameter / 2)+'px';
}
break;
case 'left':
_this.$.drawer.style.left = '-'+(_this.drawerWidth - _this.fabDiameter / 2)+'px';
var scaledDiameter = _this.fabDiameter * _this._fabScale;
_this.$.placeholder.style.left = '100%';
_this.$.placeholder.style.marginLeft = '-'+scaledDiameter+'px';
_this._fabTranslation.x = _this.fabDiameter / 2 * -1;
if(splitted.indexOf('top') === -1 && splitted.indexOf('bottom') === -1){
_this.$.drawer.style.top = '-'+( (_this.drawerHeight - _this.fabDiameter) / 2)+'px';
_this.$.placeholder.style.top = '50%';
_this.$.placeholder.style.marginTop = '-'+(scaledDiameter / 2)+'px';
}
break;
case 'right':
_this.$.drawer.style.left = (_this.fabDiameter / 2)+'px';
var scaledDiameter = _this.fabDiameter * _this._fabScale;
_this.$.placeholder.style.left = '0%';
_this._fabTranslation.x = _this.fabDiameter / 2;
if(splitted.indexOf('top') === -1 && splitted.indexOf('bottom') === -1){
_this.$.drawer.style.top = '-'+( (_this.drawerHeight - _this.fabDiameter) / 2)+'px';
_this.$.placeholder.style.top = '50%';
_this.$.placeholder.style.marginTop = '-'+(scaledDiameter / 2)+'px';
}
break;
case 'center':
_this.$.drawer.style.top = '-'+( (_this.drawerHeight - _this.fabDiameter) / 2)+'px';
_this.$.drawer.style.left = '-'+( (_this.drawerWidth - _this.fabDiameter) / 2)+'px';
_this.$.placeholder.style.top = '50%';
_this.$.placeholder.style.left = '50%';
var scaledDiameter = _this.fabDiameter * _this._fabScale / 2;
_this.$.placeholder.style.margin = '-'+scaledDiameter+'px 0 0 -'+scaledDiameter+'px';
break;
default:
console.error('Cannot process direction '+direction);
break;
}
})
},
_setAccessibility: function(){
var _this = this;
this.items.forEach(function(child, index){
if(_this.state === _this._DRAWER_STATE){
child.setAttribute('tabindex', 0);
} else if (_this.state === _this._FAB_STATE) {
child.setAttribute('tabindex', -1);
}
});
if(_this.state === _this._DRAWER_STATE) {
var firstFocus = this.querySelector('[first-focus]');
if(firstFocus) {
firstFocus.setAttribute('tabindex', 0);
firstFocus.focus();
}
}
},
toDrawer: function(){
var _this = this;
return new Promise(function(resolve, reject){
if(_this.state === _this._ANIMATING_STATE || _this.state === _this._DRAWER_STATE) return reject(new Error('Cannot display drawer now'));
_this.state = _this._ANIMATING_STATE;
_this.fire('iron-activate', {from: _this._FAB_STATE, to: _this._DRAWER_STATE})
_this.$.drawer.style.display = 'block';
var placeholderBcr = _this.$.placeholder.getBoundingClientRect();
var fabBcr = _this.$.fab.getBoundingClientRect();
var drawerBcr = _this.$.drawer.getBoundingClientRect();
var contentGroupEffect = _this._computeContentFadeInEffects(drawerBcr);
requestAnimationFrame(function(){
_this._translateInFab()
.then(function(){
_this._rippleIn(placeholderBcr, drawerBcr, fabBcr)
.then(function(){
_this._fadeInContent(contentGroupEffect)
.then(function(){
_this.$.drawerContent.style.overflow = 'auto';
_this.state = _this._DRAWER_STATE;
_this._setAccessibility();
_this.fire('iron-state-changed', {state: _this.state})
return resolve();
})
})
})
})
})
},
toFab: function(){
var _this = this;
return new Promise(function(resolve, reject){
if(_this.state === _this._ANIMATING_STATE || _this.state === _this._FAB_STATE) return reject('Cannot display fab now');
_this.state = _this._ANIMATING_STATE;
_this.fire('iron-activate', {to: _this._FAB_STATE, from: _this._DRAWER_STATE})
_this.$.drawerContent.style.overflow = 'hidden';
_this._fadeOutContent()
.then(function(){
_this._contentEffects = null;
_this.$.placeholder.style.display = 'block';
_this.$.drawer.style.boxShadow = 'none';
_this.$.drawer.style.backgroundColor = 'rgba(0,0,0,0)';
requestAnimationFrame(function(){
_this._rippleOut()
.then(function(){
_this._rippleEffect = null;
_this._translateOutFab()
.then(function(){
_this._fabEffects = null;
_this.$.drawer.style.display = 'none';
_this.state = _this._FAB_STATE;
_this._setAccessibility();
_this.fire('iron-state-changed', {state: _this._state})
return resolve();
})
})
})
})
})
},
_isChrome: function(){
// please note,
// that IE11 now returns undefined again for window.chrome
// and new Opera 30 outputs true for window.chrome
// and new IE Edge outputs to true now for window.chrome
// and if not iOS Chrome check
// so use the below updated condition
var isChromium = window.chrome,
winNav = window.navigator,
vendorName = winNav.vendor,
isOpera = winNav.userAgent.indexOf("OPR") > -1,
isIEedge = winNav.userAgent.indexOf("Edge") > -1,
isIOSChrome = winNav.userAgent.match("CriOS");
if(isIOSChrome){
return true;
} else if(isChromium !== null && isChromium !== undefined && vendorName === "Google Inc." && isOpera == false && isIEedge == false) {
return true;
} else {
return false;
}
},
_computeContentFadeInEffects: function(drawerBcr){
var _this = this;
var childrenPerRow = null;
var childrenShareWidth = true;
var previousChildWidth = null;
var delay = 50;
var keyframe = [
{ opacity: 0, transform: 'translate('+(_this._fabTranslation.x * -1)+'px, '+(_this._fabTranslation.y * -1)+'px) scale(0.8)', offset: 0 },
{ transform: 'none', opacity: 1, offset: 1 }
];
this._contentEffects = [];
var effects = [];
this.items.forEach(function(child){
var width = child.width || child.style.width;
if(previousChildWidth === null) previousChildWidth = width;
else if(previousChildWidth !== width) childrenShareWidth = false;
});
if(childrenShareWidth) childrenPerRow = (drawerBcr.width - 20) / previousChildWidth;
this.items.forEach(function(child, index){
child.style.opacity = '0';
var settings = {
duration: 200,
easing: 'ease',
delay: 0,
iterations: 1,
direction: 'normal',
fill: 'forwards'
};
if(childrenPerRow !== null){
var row = Math.ceil((index + 1)/childrenPerRow);
var col = (index < childrenPerRow - 1) ? index : index - row;
settings.delay = (row + col) * delay;
}
_this._contentEffects.push({effect: keyframe, settings: settings});
effects.push(new KeyframeEffect(child, keyframe, settings));
});
return new GroupEffect(effects);
},
_fadeInContent: function(group){
var _this = this;
return new Promise(function(resolve, reject){
var player = document.timeline.play(group);
player.onfinish = function(){
return resolve(player);
}
});
},
_fadeOutContent: function(){
var _this = this;
return new Promise(function(resolve, reject){
var effects = [];
_this.items.forEach(function(child, index){
effects.push(new KeyframeEffect(child, _this._reverse(_this._contentEffects[index].effect), _this._contentEffects[index].settings));
});
var player = document.timeline.play(new GroupEffect(effects));
player.onfinish = resolve;
})
},
_translateInFab: function(){
var _this = this;
return new Promise(function(resolve, reject){
var translateEffect = [
{ transform: 'none', offset: 0 },
{ transform: 'translate('+_this._fabTranslation.x+'px, '+_this._fabTranslation.y+'px) scale('+_this._fabScale+')', offset: 1 }
];
var opacityEffect = [
{ opacity: 1, offset: 0 },
{ opacity: 0, offset: 1 }
];
_this._fabEffects = {};
_this._fabEffects.translate = translateEffect;
_this._fabEffects.opacity = opacityEffect;
var kEffects = [
new KeyframeEffect(_this.$.fab, translateEffect, _this._fabAnimationSettings),
new KeyframeEffect(_this.$.fab.$.icon, opacityEffect, _this._fabAnimationSettings)
];
var group = new GroupEffect(kEffects);
var player = document.timeline.play(group);
player.onfinish = function(){
_this.$.fab.style.opacity = 0;
_this.$.placeholder.style.opacity = 1;
return resolve();
}
})
},
_rippleIn: function(placeholderBcr, drawerBcr, fabBcr){
var _this = this;
return new Promise(function(resolve, reject){
var diameter = Math.max(drawerBcr.height, drawerBcr.width) * 1.3;
var scaleRatio = diameter / fabBcr.width;
var fabHalfWidth = fabBcr.width * _this._fabScale / 2;
var translateX = ( (drawerBcr.left + drawerBcr.width / 2 - fabHalfWidth) - placeholderBcr.left ) / scaleRatio;
var translateY = ( (drawerBcr.top + drawerBcr.height / 2 - fabHalfWidth) - placeholderBcr.top ) / scaleRatio;
_this._rippleEffect = [
{ transform: 'none', offset: 0 },
{ transform: 'scale('+scaleRatio+') translate('+translateX+'px, '+translateY+'px)', offset: 1 }
];
var player = _this.$.placeholder.animate(_this._rippleEffect, _this._drawerAnimationSettings);
player.onfinish = function(){
_this.$.drawer.style.boxShadow = '0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12), 0 3px 1px -2px rgba(0, 0, 0, 0.2)';
_this.$.drawer.style.backgroundColor = _this.backgroundColor;
_this.$.placeholder.style.display = 'none';
return resolve();
};
})
},
_rippleOut: function(){
var _this = this;
return new Promise(function(resolve, reject){
var player = _this.$.placeholder.animate(_this._reverse(_this._rippleEffect), _this._drawerAnimationSettings);
player.onfinish = function(){
_this.$.placeholder.style.opacity = 0;
_this.$.fab.style.opacity = 1;
return resolve();
}
})
},
_translateOutFab: function(){
var _this = this;
return new Promise(function(resolve, reject){
var kEffects = [
new KeyframeEffect(_this.$.fab, _this._reverse(_this._fabEffects.translate), _this._fabAnimationSettings),
new KeyframeEffect(_this.$.fab.$.icon, _this._reverse(_this._fabEffects.opacity), _this._fabAnimationSettings)
];
var group = new GroupEffect(kEffects);
var player = document.timeline.play(group);
player.onfinish = resolve;
})
},
_reverse: function(array) {
var buffer = [];
for(var i = 0; i < array.length; i++) {
buffer[i] = array[array.length - 1 - i];
buffer[i].offset = i;
}
return buffer;
}
});
</script>
</dom-module>