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<!--
@license
Copyright (c) 2016 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/default-theme.html">
<link rel="import" href="../paper-behaviors/paper-checked-element-behavior.html">
<!--
Material design: [Checkbox](https://www.google.com/design/spec/components/selection-controls.html#selection-controls-checkbox)
`paper-checkbox` is a button that can be either checked or unchecked. User
can tap the checkbox to check or uncheck it. Usually you use checkboxes
to allow user to select multiple options from a set. If you have a single
ON/OFF option, avoid using a single checkbox and use `paper-toggle-button`
instead.
Example:
<paper-checkbox>label</paper-checkbox>
<paper-checkbox checked> label</paper-checkbox>
### Styling
The following custom properties and mixins are available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--paper-checkbox-unchecked-background-color` | Checkbox background color when the input is not checked | `transparent`
`--paper-checkbox-unchecked-color` | Checkbox border color when the input is not checked | `--primary-text-color`
`--paper-checkbox-unchecked-ink-color` | Selected/focus ripple color when the input is not checked | `--primary-text-color`
`--paper-checkbox-checked-color` | Checkbox color when the input is checked | `--primary-color`
`--paper-checkbox-checked-ink-color` | Selected/focus ripple color when the input is checked | `--primary-color`
`--paper-checkbox-checkmark-color` | Checkmark color | `white`
`--paper-checkbox-label-color` | Label color | `--primary-text-color`
`--paper-checkbox-label-checked-color` | Label color when the input is checked | `--paper-checkbox-label-color`
`--paper-checkbox-label-spacing` | Spacing between the label and the checkbox | `8px`
`--paper-checkbox-label` | Mixin applied to the label | `{}`
`--paper-checkbox-label-checked` | Mixin applied to the label when the input is checked | `{}`
`--paper-checkbox-error-color` | Checkbox color when invalid | `--error-color`
`--paper-checkbox-size` | Size of the checkbox | `18px`
`--paper-checkbox-ink-size` | Size of the ripple | `48px`
`--paper-checkbox-margin` | Margin around the checkbox container | `initial`
`--paper-checkbox-vertical-align` | Vertical alignment of the checkbox container | `middle`
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`.
@demo demo/index.html
-->
<dom-module id="paper-checkbox">
<template strip-whitespace>
<style>
:host {
display: inline-block;
white-space: nowrap;
cursor: pointer;
--calculated-paper-checkbox-size: var(--paper-checkbox-size, 18px);
/* -1px is a sentinel for the default and is replaced in `attached`. */
--calculated-paper-checkbox-ink-size: var(--paper-checkbox-ink-size, -1px);
@apply(--paper-font-common-base);
line-height: 0;
-webkit-tap-highlight-color: transparent;
}
:host([hidden]) {
display: none !important;
}
:host(:focus) {
outline: none;
}
.hidden {
display: none;
}
#checkboxContainer {
display: inline-block;
position: relative;
width: var(--calculated-paper-checkbox-size);
height: var(--calculated-paper-checkbox-size);
min-width: var(--calculated-paper-checkbox-size);
margin: var(--paper-checkbox-margin, initial);
vertical-align: var(--paper-checkbox-vertical-align, middle);
background-color: var(--paper-checkbox-unchecked-background-color, transparent);
}
#ink {
position: absolute;
/* Center the ripple in the checkbox by negative offsetting it by
* (inkWidth - rippleWidth) / 2 */
top: calc(0px - (var(--calculated-paper-checkbox-ink-size) - var(--calculated-paper-checkbox-size)) / 2);
left: calc(0px - (var(--calculated-paper-checkbox-ink-size) - var(--calculated-paper-checkbox-size)) / 2);
width: var(--calculated-paper-checkbox-ink-size);
height: var(--calculated-paper-checkbox-ink-size);
color: var(--paper-checkbox-unchecked-ink-color, var(--primary-text-color));
opacity: 0.6;
pointer-events: none;
}
:host-context([dir="rtl"]) #ink {
right: calc(0px - (var(--calculated-paper-checkbox-ink-size) - var(--calculated-paper-checkbox-size)) / 2);
left: auto;
}
#ink[checked] {
color: var(--paper-checkbox-checked-ink-color, var(--primary-color));
}
#checkbox {
position: relative;
box-sizing: border-box;
height: 100%;
border: solid 2px;
border-color: var(--paper-checkbox-unchecked-color, var(--primary-text-color));
border-radius: 2px;
pointer-events: none;
-webkit-transition: background-color 140ms, border-color 140ms;
transition: background-color 140ms, border-color 140ms;
}
/* checkbox checked animations */
#checkbox.checked #checkmark {
-webkit-animation: checkmark-expand 140ms ease-out forwards;
animation: checkmark-expand 140ms ease-out forwards;
}
@-webkit-keyframes checkmark-expand {
0% {
-webkit-transform: scale(0, 0) rotate(45deg);
}
100% {
-webkit-transform: scale(1, 1) rotate(45deg);
}
}
@keyframes checkmark-expand {
0% {
transform: scale(0, 0) rotate(45deg);
}
100% {
transform: scale(1, 1) rotate(45deg);
}
}
#checkbox.checked {
background-color: var(--paper-checkbox-checked-color, var(--primary-color));
border-color: var(--paper-checkbox-checked-color, var(--primary-color));
}
#checkmark {
position: absolute;
width: 36%;
height: 70%;
border-style: solid;
border-top: none;
border-left: none;
border-right-width: calc(2/15 * var(--calculated-paper-checkbox-size));
border-bottom-width: calc(2/15 * var(--calculated-paper-checkbox-size));
border-color: var(--paper-checkbox-checkmark-color, white);
-webkit-transform-origin: 97% 86%;
transform-origin: 97% 86%;
box-sizing: content-box; /* protect against page-level box-sizing */
}
:host-context([dir="rtl"]) #checkmark {
-webkit-transform-origin: 50% 14%;
transform-origin: 50% 14%;
}
/* label */
#checkboxLabel {
position: relative;
display: inline-block;
vertical-align: middle;
padding-left: var(--paper-checkbox-label-spacing, 8px);
white-space: normal;
line-height: normal;
color: var(--paper-checkbox-label-color, var(--primary-text-color));
@apply(--paper-checkbox-label);
}
:host([checked]) #checkboxLabel {
color: var(--paper-checkbox-label-checked-color, var(--paper-checkbox-label-color, var(--primary-text-color)));
@apply(--paper-checkbox-label-checked);
}
:host-context([dir="rtl"]) #checkboxLabel {
padding-right: var(--paper-checkbox-label-spacing, 8px);
padding-left: 0;
}
#checkboxLabel[hidden] {
display: none;
}
/* disabled state */
:host([disabled]) #checkbox {
opacity: 0.5;
border-color: var(--paper-checkbox-unchecked-color, var(--primary-text-color));
}
:host([disabled][checked]) #checkbox {
background-color: var(--paper-checkbox-unchecked-color, var(--primary-text-color));
opacity: 0.5;
}
:host([disabled]) #checkboxLabel {
opacity: 0.65;
}
/* invalid state */
#checkbox.invalid:not(.checked) {
border-color: var(--paper-checkbox-error-color, var(--error-color));
}
</style>
<div id="checkboxContainer">
<div id="checkbox" class$="[[_computeCheckboxClass(checked, invalid)]]">
<div id="checkmark" class$="[[_computeCheckmarkClass(checked)]]"></div>
</div>
</div>
<div id="checkboxLabel"><content></content></div>
</template>
</dom-module>
<script>
Polymer({
is: 'paper-checkbox',
behaviors: [
Polymer.PaperCheckedElementBehavior
],
hostAttributes: {
role: 'checkbox',
'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'
}
},
attached: function() {
var inkSize = this.getComputedStyleValue('--calculated-paper-checkbox-ink-size').trim();
// If unset, compute and set the default `--paper-checkbox-ink-size`.
if (inkSize === '-1px') {
var checkboxSize = parseFloat(this.getComputedStyleValue('--calculated-paper-checkbox-size').trim());
var defaultInkSize = Math.floor((8 / 3) * checkboxSize);
// The checkbox and ripple need to have the same parity so that their
// centers align.
if (defaultInkSize % 2 !== checkboxSize % 2) {
defaultInkSize++;
}
this.customStyle['--paper-checkbox-ink-size'] = defaultInkSize + 'px';
this.updateStyles();
}
},
_computeCheckboxClass: function(checked, invalid) {
var className = '';
if (checked) {
className += 'checked ';
}
if (invalid) {
className += 'invalid';
}
return className;
},
_computeCheckmarkClass: function(checked) {
return checked ? '' : 'hidden';
},
// create ripple inside the checkboxContainer
_createRipple: function() {
this._rippleContainer = this.$.checkboxContainer;
return Polymer.PaperInkyFocusBehaviorImpl._createRipple.call(this);
}
});
</script>
|
