1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
<!--
@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="../iron-flex-layout/iron-flex-layout.html">
<link rel="import" href="../iron-image/iron-image.html">
<link rel="import" href="../paper-material/paper-material.html">
<link rel="import" href="../paper-styles/default-theme.html">
<!--
Material design: [Cards](https://www.google.com/design/spec/components/cards.html)
`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-background-color` | The background color of the card | `--primary-background-color`
`--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 include="paper-material">
:host {
display: inline-block;
position: relative;
box-sizing: border-box;
background-color: var(--paper-card-background-color, --primary-background-color);
border-radius: 2px;
@apply(--paper-font-common-base);
@apply(--paper-card);
}
/* IE 10 support for HTML5 hidden attr */
[hidden] {
display: none !important;
}
.header {
position: relative;
border-top-left-radius: inherit;
border-top-right-radius: inherit;
overflow: hidden;
@apply(--paper-card-header);
}
.header iron-image {
display: block;
width: 100%;
--iron-image-width: 100%;
pointer-events: none;
@apply(--paper-card-header-image);
}
.header .title-text {
padding: 16px;
font-size: 24px;
font-weight: 400;
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>
<div class="header">
<iron-image hidden$="[[!image]]" src="[[image]]" preload$="[[preloadImage]]" fade$="[[fadeImage]]"></iron-image>
<div hidden$="[[!heading]]" class$="[[_computeHeadingClass(image)]]">[[heading]]</div>
</div>
<content></content>
</template>
<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: ''
},
/**
* When `true`, any change to the image url property will cause the
* `placeholder` image to be shown until the image is fully rendered.
*/
preloadImage: {
type: Boolean,
value: false
},
/**
* When `preloadImage` is true, setting `fadeImage` to true will cause the
* image to fade into place.
*/
fadeImage: {
type: Boolean,
value: false
},
/**
* The z-depth of the card, from 0-5.
*/
elevation: {
type: Number,
value: 1,
reflectToAttribute: true
},
/**
* Set this to true to animate the card shadow when setting a new
* `z` value.
*/
animatedShadow: {
type: Boolean,
value: false
},
/**
* Read-only property used to pass down the `animatedShadow` value to
* the underlying paper-material style (since they have different names).
*/
animated: {
type: Boolean,
reflectToAttribute: true,
readOnly: true,
computed: '_computeAnimated(animatedShadow)'
}
},
_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;
},
_computeAnimated: function(animatedShadow) {
return animatedShadow;
}
});
</script>
</dom-module>
|
