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l2t-paper-color-radio.html
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<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../paper-behaviors/paper-checked-element-behavior.html">
<link rel="import" href="../paper-styles/default-theme.html">
<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
<link rel="import" href="../iron-icons/iron-icons.html">
<!--
Material design: [Radio button](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-radio-button)
`l2t-paper-color-radio` is a button that can be either checked or unchecked.
User can tap the radio button to check or uncheck it.
Use a `<paper-radio-group>` to group a set of radio buttons. When radio buttons
are inside a radio group, exactly one radio button in the group can be checked
at any time.
Example:
<l2t-paper-color-radio></l2t-paper-color-radio>
<l2t-paper-color-radio>Item label</l2t-paper-color-radio>
### Styling
The following custom properties and mixins are available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--l2t-paper-color-radio-color` | Radio button background color (this is modified by _colorUpdate) | `--primary-color`
`--l2t-paper-color-radio-ink-color` | Selected/focus ripple color (this is modified by _colorUpdate) | `--primary-color`
`--l2t-paper-color-radio-size` | Size of the radio button | `48px`
`--l2t-paper-color-radio-ink-size` | Size of the ripple (calculated when attached) | `76.8px`
`--l2t-paper-color-radio-label-color` | Label color | `--primary-text-color`
`--l2t-paper-color-radio-label-spacing` | Spacing between the label and the button | `10px`
`--l2t-paper-color-icon-color` | Color of the checked icon | `#FFF`
`--l2t-paper-color-radio-container` | A mixin applied to the internal radio container | `{}`
`--l2t-paper-color-radio-label` | A mixin applied to the internal label | `{}`
`--l2t-paper-color-radio-label-checked` | A mixin applied to the internal label when the radio button is checked | `{}`
This element applies the mixin `--paper-font-common-base` but does not import `paper-styles/typography.html`.
In order to apply the `Roboto` font to this element, make sure you've imported `paper-styles/typography.html`.
@group l2t Paper Elements
@element l2t-paper-color-radio
-->
<dom-module id="l2t-paper-color-radio">
<template strip-whitespace>
<style>
:host {
display: inline-block;
line-height: 0;
white-space: nowrap;
cursor: pointer;
@apply --paper-font-common-base;
--calculated-l2t-paper-color-radio-size: var(--l2t-paper-color-radio-size, 48px);
--calculated-l2t-paper-color-icon-size: calc(var(--calculated-l2t-paper-color-radio-size)/2);
/* -1px is a sentinel for the default and is replace in `attached`. */
--calculated-l2t-paper-color-radio-ink-size: var(--l2t-paper-color-radio-ink-size, -1px);
}
:host(:focus) {
outline: none;
-webkit-tap-highlight-color: transparent;
}
#radioContainer {
@apply --layout-inline;
@apply --layout-center-center;
position: relative;
width: var(--calculated-l2t-paper-color-radio-size);
height: var(--calculated-l2t-paper-color-radio-size);
vertical-align: middle;
@apply --l2t-paper-color-radio-container;
}
#ink {
position: absolute;
top: 50%;
left: 50%;
right: auto;
width: var(--calculated-l2t-paper-color-radio-ink-size);
height: var(--calculated-l2t-paper-color-radio-ink-size);
color: var(--l2t-paper-color-radio-ink-color, var(--primary-text-color));
opacity: 0.6;
pointer-events: none;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
}
#offRadio, #onRadio {
position: absolute;
box-sizing: border-box;
top: 0;
left: 0;
width: 100%;
height: 100%;
border-radius: 50%;
}
#offRadio {
background: var(--l2t-paper-color-radio-color, var(--primary-color));
}
#onRadio {
--iron-icon-fill-color: var(--l2t-paper-color-icon-color, #FFF);
--iron-icon-height: var(--calculated-l2t-paper-color-icon-size);
--iron-icon-width: var(--calculated-l2t-paper-color-icon-size);
display: flex;
align-items: center;
justify-content: center;
background-color: rgba(0,0,0,.3);
-webkit-transform: scale(0);
transform: scale(0);
transition: -webkit-transform ease 0.28s;
transition: transform ease 0.28s;
will-change: transform;
}
:host([checked]) #onRadio {
-webkit-transform: scale(0.7);
transform: scale(0.7);
}
#radioLabel {
line-height: normal;
position: relative;
display: inline-block;
vertical-align: middle;
margin-left: var(--l2t-paper-color-radio-label-spacing, 0px);
white-space: normal;
color: var(--l2t-paper-color-radio-label-color, var(--primary-text-color));
@apply --l2t-paper-color-radio-label;
}
:host([checked]) #radioLabel {
@apply --l2t-paper-color-radio-label-checked;
}
:host-context([dir="rtl"]) #radioLabel {
margin-left: 0;
margin-right: var(--l2t-paper-color-radio-label-spacing, 0px);
}
#radioLabel[hidden] {
display: none;
}
</style>
<div id="radioContainer">
<div id="offRadio"></div>
<div id="onRadio"><iron-icon icon="[[icon]]"></iron-icon>
</div>
</div>
<div id="radioLabel"><slot></slot></div>
</template>
<script>
Polymer({
is: 'l2t-paper-color-radio',
behaviors: [
Polymer.PaperCheckedElementBehavior
],
hostAttributes: {
role: 'radio',
'aria-checked': 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
*/
ariaActiveAttribute: {
type: String,
value: 'aria-checked'
},
/**
* color: string to store the color value
*/
color: {
type: String,
value: '#3f51b5',
reflectToAttribute: true,
observer: '_colorUpdate'
},
/**
* icon: string to store iron-icon name for the check symbol
*/
icon: {
type: String,
value: 'check'
}
},
/**
* _colorUpdate: updates styles to match color
*/
_colorUpdate: function() {
if(this._testColor()){
this.updateStyles({
'--l2t-paper-color-radio-ink-color': this.color,
'--l2t-paper-color-radio-color': this.color,
});
} else {
console.warn("l2t-paper-color-radio: "+this.color+" is not a valid color, using default");
this.color = "#3f51b5";
}
},
/**
* _testColor: returns true if this.color is valid
*/
_testColor: function() {
var testDiv = document.createElement("div");
testDiv.style.color = this.color;
return testDiv.style.color != '';
},
ready: function() {
this._rippleContainer = this.$.radioContainer;
},
attached: function() {
// Wait until styles have resolved to check for the default sentinel.
// See polymer#4009 for more details.
Polymer.RenderStatus.afterNextRender(this, function() {
var inkSize = this.getComputedStyleValue('--calculated-l2t-paper-color-radio-ink-size').trim();
// If unset, compute and set the default `--l2t-paper-color-radio-ink-size`.
if (inkSize === '-1px') {
var size = parseFloat(this.getComputedStyleValue('--calculated-l2t-paper-color-radio-size').trim());
var defaultInkSize = Math.floor(1.6 * size);
// The button and ripple need to have the same parity so that their
// centers align.
if (defaultInkSize % 2 !== size % 2) {
defaultInkSize++;
}
this.updateStyles({
'--l2t-paper-color-radio-ink-size': defaultInkSize + 'px',
});
}
});
},
})
</script>
</dom-module>