| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library curly_block_element; |
| |
| import 'package:polymer/polymer.dart'; |
| |
| @CustomTag('curly-block') |
| class CurlyBlockElement extends PolymerElement { |
| CurlyBlockElement.created() : super.created(); |
| |
| @observable bool expanded = false; |
| @observable bool busy = false; |
| @published var callback = null; |
| @published bool expand = false; |
| |
| void expandChanged(oldValue) { |
| expanded = expand; |
| } |
| |
| void doneCallback() { |
| expanded = !expanded; |
| busy = false; |
| } |
| |
| void toggleExpand(var a, var b, var c) { |
| assert(callback == null || expand == false); |
| if (busy) { |
| return; |
| } |
| if (callback != null) { |
| busy = true; |
| callback(!expanded, doneCallback); |
| } else { |
| expanded = !expanded; |
| } |
| } |
| } |