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1 <!-- | |
2 Copyright (c) 2014 The Polymer Project Authors. All rights reserved. | |
3 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt | |
4 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt | |
5 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt | |
6 Code distributed by Google as part of the polymer project is also | |
7 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt | |
8 --> | |
9 | |
10 <!-- | |
11 `paper-tabs` is a `core-selector` styled to look like tabs. Tabs make it easy to
| |
12 explore and switch between different views or functional aspects of an app, or | |
13 to browse categorized data sets. | |
14 | |
15 Use `selected` property to get or set the selected tab. | |
16 | |
17 Example: | |
18 | |
19 <paper-tabs selected="0"> | |
20 <paper-tab>TAB 1</paper-tab> | |
21 <paper-tab>TAB 2</paper-tab> | |
22 <paper-tab>TAB 3</paper-tab> | |
23 </paper-tabs> | |
24 | |
25 See <a href="#paper-tab">paper-tab</a> for more information about | |
26 `paper-tab`. | |
27 | |
28 Styling tabs: | |
29 | |
30 To change the sliding bar color: | |
31 | |
32 paper-tabs.pink::shadow #selectionBar { | |
33 background-color: #ff4081; | |
34 } | |
35 | |
36 @group Paper Elements | |
37 @element paper-tabs | |
38 @extends core-selector | |
39 @homepage github.io | |
40 --> | |
41 | |
42 <link rel="import" href="../core-selector/core-selector.html"> | |
43 <link rel="import" href="paper-tab.html"> | |
44 | |
45 <polymer-element name="paper-tabs" extends="core-selector" attributes="noink nob
ar" role="tablist"> | |
46 <template> | |
47 | |
48 <link rel="stylesheet" href="paper-tabs.css"> | |
49 | |
50 <div id="tabsContainer" horizontal layout> | |
51 | |
52 <shadow></shadow> | |
53 <div id="selectionBar" hidden?="{{nobar}}" on-transitionend="{{barTransition
End}}"></div> | |
54 | |
55 </div> | |
56 | |
57 </template> | |
58 <script> | |
59 | |
60 Polymer('paper-tabs', { | |
61 | |
62 /** | |
63 * If true, ink effect is disabled. | |
64 * | |
65 * @attribute noink | |
66 * @type boolean | |
67 * @default false | |
68 */ | |
69 noink: false, | |
70 | |
71 /** | |
72 * If true, the bottom bar to indicate the selected tab will not be shown. | |
73 * | |
74 * @attribute nobar | |
75 * @type boolean | |
76 * @default false | |
77 */ | |
78 nobar: false, | |
79 | |
80 activateEvent: 'down', | |
81 | |
82 nostretch: false, | |
83 | |
84 selectedIndexChanged: function(old) { | |
85 var s = this.$.selectionBar.style; | |
86 | |
87 if (!this.selectedItem) { | |
88 s.width = 0; | |
89 s.left = 0; | |
90 return; | |
91 } | |
92 | |
93 var w = 100 / this.items.length; | |
94 | |
95 if (this.nostretch || old === null || old === -1) { | |
96 s.width = w + '%'; | |
97 s.left = this.selectedIndex * w + '%'; | |
98 return; | |
99 } | |
100 | |
101 var m = 5; | |
102 this.$.selectionBar.classList.add('expand'); | |
103 if (old < this.selectedIndex) { | |
104 s.width = w + w * (this.selectedIndex - old) - m + '%'; | |
105 this._transitionCounter = 1; | |
106 } else { | |
107 s.width = w + w * (old - this.selectedIndex) - m + '%'; | |
108 s.left = this.selectedIndex * w + m + '%'; | |
109 this._transitionCounter = 2; | |
110 } | |
111 }, | |
112 | |
113 barTransitionEnd: function(e) { | |
114 this._transitionCounter--; | |
115 var cl = this.$.selectionBar.classList; | |
116 if (cl.contains('expand') && !this._transitionCounter) { | |
117 cl.remove('expand'); | |
118 cl.add('contract'); | |
119 var s = this.$.selectionBar.style; | |
120 var w = 100 / this.items.length; | |
121 s.width = w + '%'; | |
122 s.left = this.selectedIndex * w + '%'; | |
123 } else if (cl.contains('contract')) { | |
124 cl.remove('contract'); | |
125 } | |
126 } | |
127 | |
128 }); | |
129 | |
130 </script> | |
131 </polymer-element> | |
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