Try Dart 1 hour experience first draft

src/site/articles/trydart/examples/5-checkboxbadge/piratebadge.dart

+// Copyright (c) 2012, 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.
+
+import 'dart:html';
+import 'dart:math';
+
+InputElement inputNameElement;
+ButtonElement genButtonElement;
+
+bool useRandomName = false;
+
+void  main() {
+  inputNameElement = query('#inputName');
+  inputNameElement.onChange.listen(generateBadge);
+
+  genButtonElement = query('#generateButton');
+  genButtonElement.onClick.listen(generateBadge);
+
+  query('#useRandomName').onClick.listen(useRandomNameClickHandler);
+}
+
+void generateBadge(Event event) {
+  if (!useRandomName) {
+    query('#badgeName').text = new PirateName(firstName: inputNameElement.value).name;
+  } else {
+    query('#badgeName').text = new PirateName().name;
+  }
+}
+
+void useRandomNameClickHandler(MouseEvent e) {  
+  if ((e.target as CheckboxInputElement).checked) {
+    genButtonElement.disabled = false;
+    inputNameElement
+        ..disabled = true
+        ..value = ''
+        ..placeholder = '';
+    useRandomName = true;
+  } else {
+    genButtonElement.disabled = true;
+    inputNameElement
+        ..disabled = false
+        ..placeholder = 'Your name here';
+    useRandomName = false;
+  }
+}
+
+class PirateName {
+  
+  Random indexGen = new Random();
+  
+  String _pirateName;
+  
+  String get name => _pirateName;
+         set name(String value) => _pirateName = value;
+         
+  String toString() => name;
+
+  PirateName({String firstName}) {
+    if (firstName == null) {
+      firstName = names[indexGen.nextInt(names.length)];
+    }
+    _pirateName = '$firstName';
+  }
+
+  List names = const [ 'Anne', 'Bette', 'Cate', 'Dawn',
+                       'Elise', 'Faye', 'Ginger', 'Harriot',
+                       'Izzy', 'Jane', 'Kaye', 'Liz',
+                       'Maria', 'Nell', 'Olive', 'Pat',
+                       'Queenie', 'Rae', 'Sal', 'Tam',
+                       'Uma', 'Violet', 'Wilma', 'Xana',
+                       'Yvonne', 'Zelda',
+                       'Abe', 'Billy', 'Caleb', 'Davie',
+                       'Eb', 'Frank', 'Gabe', 'House',
+                       'Icarus', 'Jack', 'Kurt', 'Larry',
+                       'Mike', 'Nolan', 'Oliver', 'Pat',
+                       'Quib', 'Roy', 'Sal', 'Tom',
+                       'Ube', 'Val', 'Walt', 'Xavier',
+                       'Yvan', 'Zeb'];
+}
+