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src/site/codelabs/darrrt/examples/3-buttonbadge/piratebadge.dart

Index: src/site/codelabs/darrrt/examples/3-buttonbadge/piratebadge.dart
diff --git a/src/site/codelabs/darrrt/examples/3-buttonbadge/piratebadge.dart b/src/site/codelabs/darrrt/examples/3-buttonbadge/piratebadge.dart
new file mode 100644
index 0000000000000000000000000000000000000000..308579c0c9aad85a1c334551ff4f3026ff97d343
--- /dev/null
+++ b/src/site/codelabs/darrrt/examples/3-buttonbadge/piratebadge.dart
@@ -0,0 +1,34 @@
+// 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';
+
+ButtonElement genButton;
+
+void  main() {
+  querySelector('#inputName').onInput.listen(updateBadge);
+  genButton = querySelector('#generateButton');
+  genButton.onClick.listen(generateBadge);
+}
+
+void updateBadge(Event e) {
+  String inputName = (e.target as InputElement).value;
+  
+  setBadgeName(inputName);
+  if (inputName.trim().isEmpty) {
+    genButton..disabled = false
+             ..text = 'Aye! Gimme a name!';
+  } else {
+    genButton..disabled = true
+             ..text = 'Arrr! Write yer name!';
+  }
+}
+
+void generateBadge(Event e) {
+  setBadgeName('Anne Bonney');
+}
+
+void setBadgeName(String newName) {
+  querySelector('#badgeName').text = newName;
+}