aboutsummaryrefslogtreecommitdiff
path: root/catapult/third_party/polymer/components/paper-item/README.md
blob: 18deb629f49cfb857c0fd9e4eae9d14d359bcab8 (plain)
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

<!---

This README is automatically generated from the comments in these files:
paper-icon-item.html  paper-item-behavior.html  paper-item-body.html  paper-item.html

Edit those files, and our readme bot will duplicate them over here!
Edit this file, and the bot will squash your changes :)

The bot does some handling of markdown. Please file a bug if it does the wrong
thing! https://github.com/PolymerLabs/tedium/issues

-->

[![Build status](https://travis-ci.org/PolymerElements/paper-item.svg?branch=master)](https://travis-ci.org/PolymerElements/paper-item)

_[Demo and API docs](https://elements.polymer-project.org/elements/paper-item)_


##&lt;paper-item&gt;

Material design: [Lists](https://www.google.com/design/spec/components/lists.html)

`<paper-item>` is an interactive list item. By default, it is a horizontal flexbox.

```html
<paper-item>Item</paper-item>
```

Use this element with `<paper-item-body>` to make Material Design styled two-line and three-line
items.

```html
<paper-item>
  <paper-item-body two-line>
    <div>Show your status</div>
    <div secondary>Your status is visible to everyone</div>
  </paper-item-body>
  <iron-icon icon="warning"></iron-icon>
</paper-item>
```

To use `paper-item` as a link, wrap it in an anchor tag. Since `paper-item` will
already receive focus, you may want to prevent the anchor tag from receiving
focus as well by setting its tabindex to -1.

```html
<a href="https://www.polymer-project.org/" tabindex="-1">
  <paper-item raised>Polymer Project</paper-item>
</a>
```

If you are concerned about performance and want to use `paper-item` in a `paper-listbox`
with many items, you can just use a native `button` with the `paper-item` class
applied (provided you have correctly included the shared styles):

```html
<style is="custom-style" include="paper-item-shared-styles"></style>

<paper-listbox>
  <button class="paper-item" role="option">Inbox</button>
  <button class="paper-item" role="option">Starred</button>
  <button class="paper-item" role="option">Sent mail</button>
</paper-listbox>
```

### Styling

The following custom properties and mixins are available for styling:

| Custom property | Description | Default |
| --- | --- | --- |
| `--paper-item-min-height` | Minimum height of the item | `48px` |
| `--paper-item` | Mixin applied to the item | `{}` |
| `--paper-item-selected-weight` | The font weight of a selected item | `bold` |
| `--paper-item-selected` | Mixin applied to selected paper-items | `{}` |
| `--paper-item-disabled-color` | The color for disabled paper-items | `--disabled-text-color` |
| `--paper-item-disabled` | Mixin applied to disabled paper-items | `{}` |
| `--paper-item-focused` | Mixin applied to focused paper-items | `{}` |
| `--paper-item-focused-before` | Mixin applied to :before focused paper-items | `{}` |

### Accessibility

This element has `role="listitem"` by default. Depending on usage, it may be more appropriate to set
`role="menuitem"`, `role="menuitemcheckbox"` or `role="menuitemradio"`.

```html
<paper-item role="menuitemcheckbox">
  <paper-item-body>
    Show your status
  </paper-item-body>
  <paper-checkbox></paper-checkbox>
</paper-item>
```



##&lt;paper-icon-item&gt;

`<paper-icon-item>` is a convenience element to make an item with icon. It is an interactive list
item with a fixed-width icon area, according to Material Design. This is useful if the icons are of
varying widths, but you want the item bodies to line up. Use this like a `<paper-item>`. The child
node with the attribute `item-icon` is placed in the icon area.

```html
<paper-icon-item>
  <iron-icon icon="favorite" item-icon></iron-icon>
  Favorite
</paper-icon-item>
<paper-icon-item>
  <div class="avatar" item-icon></div>
  Avatar
</paper-icon-item>
```

### Styling

The following custom properties and mixins are available for styling:

| Custom property | Description | Default |
| --- | --- | --- |
| `--paper-item-icon-width` | Width of the icon area | `56px` |
| `--paper-item-icon` | Mixin applied to the icon area | `{}` |
| `--paper-icon-item` | Mixin applied to the item | `{}` |
| `--paper-item-selected-weight` | The font weight of a selected item | `bold` |
| `--paper-item-selected` | Mixin applied to selected paper-items | `{}` |
| `--paper-item-disabled-color` | The color for disabled paper-items | `--disabled-text-color` |
| `--paper-item-disabled` | Mixin applied to disabled paper-items | `{}` |
| `--paper-item-focused` | Mixin applied to focused paper-items | `{}` |
| `--paper-item-focused-before` | Mixin applied to :before focused paper-items | `{}` |



##&lt;paper-item-body&gt;

Use `<paper-item-body>` in a `<paper-item>` or `<paper-icon-item>` to make two- or
three- line items. It is a flex item that is a vertical flexbox.

```html
<paper-item>
  <paper-item-body two-line>
    <div>Show your status</div>
    <div secondary>Your status is visible to everyone</div>
  </paper-item-body>
</paper-item>
```

The child elements with the `secondary` attribute is given secondary text styling.

### Styling

The following custom properties and mixins are available for styling:

| Custom property | Description | Default |
| --- | --- | --- |
| `--paper-item-body-two-line-min-height` | Minimum height of a two-line item | `72px` |
| `--paper-item-body-three-line-min-height` | Minimum height of a three-line item | `88px` |
| `--paper-item-body-secondary-color` | Foreground color for the `secondary` area | `--secondary-text-color` |
| `--paper-item-body-secondary` | Mixin applied to the `secondary` area | `{}` |



<!-- No docs for Polymer.PaperItemBehavior found. -->