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| 1 <!-- | |
| 2 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 3 // Use of this source code is governed by a BSD-style license that can be | |
| 4 // found in the LICENSE file. | |
| 5 --> | |
| 6 <import src="sky-element.sky" /> | |
| 7 <import src="sky-icon.sky" /> | |
| 8 | |
| 9 <sky-element attributes="selected:boolean, group:string"> | |
| 10 <template> | |
| 11 <style> | |
| 12 :host { | |
| 13 display: inline-flex; | |
| 14 -webkit-user-select: none; | |
| 15 margin: 8px 16px; | |
| 16 } | |
| 17 </style> | |
| 18 <sky-icon size="18" /> | |
| 19 </template> | |
| 20 <script> | |
| 21 import "dart:sky"; | |
| 22 | |
| 23 final Map<Node, _RadioGroupController> _controllerMap = new Map(); | |
| 24 | |
| 25 class _RadioGroupController { | |
| 26 static _RadioGroupController forRadio(radio) { | |
| 27 Node owner = radio.owner; | |
| 28 return _controllerMap.putIfAbsent(owner, () => | |
| 29 new _RadioGroupController(owner)); | |
| 30 } | |
| 31 | |
| 32 final Node _scope; | |
| 33 final Set<SkyRadio> _radios = new Set<SkyRadio>(); | |
| 34 | |
| 35 _RadioGroupController(this._scope); | |
| 36 | |
| 37 void addRadio(SkyRadio radio) { | |
| 38 _radios.add(radio); | |
| 39 // If this new radio is default-selected, take selection from the group. | |
| 40 if (radio.selected) | |
| 41 takeSelectionFromGroup(radio); | |
| 42 } | |
| 43 | |
| 44 void removeRadio(SkyRadio radio) { | |
| 45 _radios.remove(radio); | |
| 46 if (_radios.isEmpty) | |
| 47 _controllerMap.remove(_scope); | |
| 48 } | |
| 49 | |
| 50 void takeSelectionFromGroup(SkyRadio selectedRadio) { | |
| 51 String group = selectedRadio.group; | |
| 52 if (group == null) | |
| 53 return; | |
| 54 _radios.forEach((SkyRadio radio) { | |
| 55 if (selectedRadio == radio) | |
| 56 return; | |
| 57 if (radio.group != group) | |
| 58 return; | |
| 59 radio.selected = false; | |
| 60 }); | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 const String _kOnIcon = 'toggle/radio_button_on_black'; | |
| 65 const String _kOffIcon = 'toggle/radio_button_off_black'; | |
| 66 | |
| 67 @Tagname('sky-radio') | |
| 68 class SkyRadio extends SkyElement { | |
| 69 _RadioGroupController _controller; | |
| 70 SkyIcon _icon; | |
| 71 | |
| 72 SkyRadio() { | |
| 73 addEventListener('click', _handleClick); | |
| 74 } | |
| 75 | |
| 76 void shadowRootReady() { | |
| 77 _icon = shadowRoot.querySelector('sky-icon'); | |
| 78 _icon.type = selected ? _kOnIcon : _kOffIcon; | |
| 79 } | |
| 80 | |
| 81 void attached() { | |
| 82 super.attached(); | |
| 83 _controller = _RadioGroupController.forRadio(this); | |
| 84 _controller.addRadio(this); | |
| 85 } | |
| 86 | |
| 87 void detached() { | |
| 88 super.detached(); | |
| 89 _controller.removeRadio(this); | |
| 90 _controller = null; | |
| 91 } | |
| 92 | |
| 93 void selectedChanged(bool oldValue, bool newValue) { | |
| 94 if (_icon != null) | |
| 95 _icon.type = newValue ? _kOnIcon : _kOffIcon; | |
| 96 if (newValue && _controller != null) | |
| 97 _controller.takeSelectionFromGroup(this); | |
| 98 } | |
| 99 | |
| 100 void groupChanged(String oldValue, String newValue) { | |
| 101 if (selected && _controller != null) | |
| 102 _controller.takeSelectionFromGroup(this); | |
| 103 } | |
| 104 | |
| 105 _handleClick(_) { | |
| 106 this.selected = true; | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 _init(script) => register(script, SkyRadio); | |
| 111 </script> | |
| 112 </sky-element> | |
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Chromium Code Reviews
Issue 1132063007:
Rationalize Dart mojo and sky package structure (Closed)
Base URL: https://github.com/domokit/mojo.git@master