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Side by Side Diff: runtime/observatory/lib/src/elements/nav/menu_item.dart

Issue 2160123002: Converted Observatory nav-menu-item element (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Converted from single to triple quotes Created 4 years, 5 months ago
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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4
5 import 'dart:html';
6 import 'dart:async';
7 import 'package:observatory/src/elements/helpers/tag.dart';
8 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
9
10 class NavMenuItemElement extends HtmlElement implements Renderable {
11 static final StyleElement _style = () {
12 var style = new StyleElement();
13 style.text = '''li.nav-menu-item {
14 float: none;
15 border-top: 1px solid #677;
16 border-bottom: 1px solid #556; position: relative;
17 }
18 li.nav-menu-item:hover {
19 background: #455;
20 }
21 li.nav-menu-item > a {
22 display: block;
23 padding: 12px 12px;
24 color: white;
25 text-decoration: none;
26 }
27 li.nav-menu-item > ul {
28 display: none;
29 position: absolute;
30 top:0;
31 left: 100%;
32 list-style: none;
33 padding: 0;
34 margin-left: 0;
35 width: auto;
36 z-index: 1000;
37 font: 400 16px \'Montserrat\', sans-serif;
38 color: white;
39 background: #567;
40 }
41 li.nav-menu-item > ul:after {
42 content: ""; clear: both; display: block;
43 }
44 li.nav-menu-item:hover > ul {
45 display: block;
46 }''';
47 return style;
48 }();
49
50 static const tag = const Tag<NavMenuItemElement>('nav-menu-item-wrapped');
51
52 RenderingScheduler _r;
53
54 Stream<RenderedEvent<NavMenuItemElement>> get onRendered => _r.onRendered;
55
56 String _label;
57 String _link;
58 String get label => _label;
59 String get link => _link;
60 set label(String value) {
61 if (_label != value) {
62 _label = value;
63 _r.dirty();
64 } else {
65 _r.scheduleNotification();
66 }
67 }
68 set link(String value) {
69 if (_link != value) {
70 _link = value;
71 _r.dirty();
72 } else {
73 _r.scheduleNotification();
74 }
75 }
76
77
78 factory NavMenuItemElement(String label, {String link,
79 RenderingQueue queue}) {
80 assert(label != null);
81 NavMenuItemElement e = document.createElement(tag.name);
82 e._r = new RenderingScheduler(e, queue: queue);
83 e._label = label;
84 e._link = link;
85 return e;
86 }
87
88 NavMenuItemElement.created() : super.created() { createShadowRoot(); }
89
90 @override
91 void attached() { super.attached(); _r.enable(); }
92
93 @override
94 void detached() {
95 super.detached(); _r.disable(notify: true);
96 shadowRoot.children = [];
97 }
98
99 void render() {
100 shadowRoot.children = [
101 _style.clone(true),
102 new LIElement()
103 ..classes = ['nav-menu-item']
104 ..children = [
105 new AnchorElement(href: '#$link')
106 ..text = label,
107 new UListElement()
108 ..children = [
109 new ContentElement()
110 ]
111 ]
112 ];
113 }
114 }
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