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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="../iron-behaviors/iron-button-state.html">
<link rel="import" href="../iron-behaviors/iron-control-state.html">
<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
<link rel="import" href="../paper-behaviors/paper-ripple-behavior.html">
<!--
`paper-tab` is styled to look like a tab. It should be used in conjunction with
`paper-tabs`.
Example:
<paper-tabs selected="0">
<paper-tab>TAB 1</paper-tab>
<paper-tab>TAB 2</paper-tab>
<paper-tab>TAB 3</paper-tab>
</paper-tabs>
### Styling
The following custom properties and mixins are available for styling:
Custom property | Description | Default
----------------|-------------|----------
`--paper-tab-ink` | Ink color | `--paper-yellow-a100`
`--paper-tab` | Mixin applied to the tab | `{}`
`--paper-tab-content` | Mixin applied to the tab content | `{}`
`--paper-tab-content-unselected` | Mixin applied to the tab content when the tab is not selected | `{}`
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`.
-->
<dom-module id="paper-tab">
<template>
<style>
:host {
@apply(--layout-inline);
@apply(--layout-center);
@apply(--layout-center-justified);
@apply(--layout-flex-auto);
position: relative;
padding: 0 12px;
overflow: hidden;
cursor: pointer;
vertical-align: middle;
@apply(--paper-font-common-base);
@apply(--paper-tab);
}
:host(:focus) {
outline: none;
}
:host([link]) {
padding: 0;
}
.tab-content {
height: 100%;
transform: translateZ(0);
-webkit-transform: translateZ(0);
transition: opacity 0.1s cubic-bezier(0.4, 0.0, 1, 1);
@apply(--layout-horizontal);
@apply(--layout-center-center);
@apply(--layout-flex-auto);
@apply(--paper-tab-content);
}
:host(:not(.iron-selected)) > .tab-content {
opacity: 0.8;
@apply(--paper-tab-content-unselected);
}
:host(:focus) .tab-content {
opacity: 1;
font-weight: 700;
}
paper-ripple {
color: var(--paper-tab-ink, --paper-yellow-a100);
}
.tab-content > ::content > a {
@apply(--layout-flex-auto);
height: 100%;
}
</style>
<div class="tab-content">
<content></content>
</div>
</template>
</dom-module>
<script>
Polymer({
is: 'paper-tab',
behaviors: [
Polymer.IronControlState,
Polymer.IronButtonState,
Polymer.PaperRippleBehavior
],
properties: {
/**
* If true, the tab will forward keyboard clicks (enter/space) to
* the first anchor element found in its descendants
*/
link: {
type: Boolean,
value: false,
reflectToAttribute: true
}
},
hostAttributes: {
role: 'tab'
},
listeners: {
down: '_updateNoink',
tap: '_onTap'
},
attached: function() {
this._updateNoink();
},
get _parentNoink () {
var parent = Polymer.dom(this).parentNode;
return !!parent && !!parent.noink;
},
_updateNoink: function() {
this.noink = !!this.noink || !!this._parentNoink;
},
_onTap: function(event) {
if (this.link) {
var anchor = this.queryEffectiveChildren('a');
if (!anchor) {
return;
}
// Don't get stuck in a loop delegating
// the listener from the child anchor
if (event.target === anchor) {
return;
}
anchor.click();
}
}
});
</script>
|
