paper-card.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-material/paper-material.html">
<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
<!--
Material Design: <a href="http://www.google.com/design/spec/components/cards.html">Cards</a>
`paper-card` is a container with a drop shadow.
Example:
<paper-card heading="Card Title">
<div class="card-content">Some content</div>
<div class="card-actions">
<paper-button>Some action</paper-button>
</div>
</paper-card>
Example - top card image:
<paper-card heading="Card Title" image="/path/to/image.png">
...
</paper-card>
### Accessibility
By default, the `aria-label` will be set to the value of the `heading` attribute.
### Styling
The following custom properties and mixins are available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--paper-card-header-color` | The color of the header text | `#000`
`--paper-card-header` | Mixin applied to the card header section | `{}`
`--paper-card-header-text` | Mixin applied to the title in the card header section | `{}`
`--paper-card-header-image` | Mixin applied to the image in the card header section | `{}`
`--paper-card-header-image-text` | Mixin applied to the text overlapping the image in the card header section | `{}`
`--paper-card-content` | Mixin applied to the card content section| `{}`
`--paper-card-actions` | Mixin applied to the card action section | `{}`
`--paper-card` | Mixin applied to the card | `{}`
@group Paper Elements
@element paper-card
@demo demo/index.html
-->
<dom-module id="paper-card">
<template>
<style>
:host {
display: inline-block;
position: relative;
box-sizing: border-box;
background: #fff;
border-radius: 2px;
@apply(--paper-card);
}
paper-material {
border-radius: inherit;
@apply(--layout-fit);
}
/* IE 10 support for HTML5 hidden attr */
[hidden] {
display: none !important;
}
.header {
position: relative;
@apply(--paper-card-header);
}
.header img {
width: 100%;
pointer-events: none;
@apply(--paper-card-header-image);
}
.header .title-text {
padding: 16px;
font-size: 24px;
font-weight: bold;
color: var(--paper-card-header-color, #000);
@apply(--paper-card-header-text);
}
.header .title-text.over-image {
position: absolute;
bottom: 0px;
@apply(--paper-card-header-image-text);
}
:host ::content .card-content {
padding: 16px;
position:relative;
@apply(--paper-card-content);
}
:host ::content .card-actions {
border-top: 1px solid #e8e8e8;
padding: 5px 16px;
position:relative;
@apply(--paper-card-actions);
}
</style>
<paper-material animated$="[[animatedShadow]]" elevation="[[elevation]]"></paper-material>
<div class="header">
<img hidden$="[[!image]]" src="[[image]]">
<div hidden$="[[!heading]]" class$="[[_computeHeadingClass(image)]]">[[heading]]</div>
</div>
<content></content>
</template>
</dom-module>
<script>
Polymer({
is: 'paper-card',
properties: {
/**
* The title of the card.
*/
heading: {
type: String,
value: '',
observer: '_headingChanged'
},
/**
* The url of the title image of the card.
*/
image: {
type: String,
value: ''
},
/**
* The z-depth of the card, from 0-5.
*/
elevation: {
type: Number,
value: 1
},
/**
* Set this to true to animate the card shadow when setting a new
* `z` value.
*/
animatedShadow: {
type: Boolean,
value: false
}
},
_headingChanged: function(heading) {
var label = this.getAttribute('aria-label');
this.setAttribute('aria-label', heading);
},
_computeHeadingClass: function(image) {
var cls = 'title-text';
if (image)
cls += ' over-image';
return cls;
}
});
</script>