Make the keyboard reappear when you tap on a text field after having dismissed the keyboard.

sky/framework/components/input.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import '../editing/editable_string.dart';
 import '../editing/editable_text.dart';
 import '../editing/keyboard.dart';
 import '../fn.dart';
 import '../theme/colors.dart';
 import '../theme/typography.dart' as typography;
+import 'dart:sky' as sky;
 
 typedef void ValueChanged(value);
 
 class Input extends Component {
   static final Style _style = new Style('''
     display: paragraph;
     transform: translateX(0);
     margin: 8px;
     padding: 8px;
     border-bottom: 1px solid ${Grey[200]};
@@ skipping 54 matching lines @@
 
     if (placeholder != null && _value.isEmpty) {
       children.add(new Container(
           style: _placeholderStyle,
           children: [new Text(placeholder)]
       ));
     }
 
     children.add(new EditableText(value: _editableValue, focused: focused));
 
-    return new Container(
-      style: _style,
-      inlineStyle: focused ? _focusedInlineStyle : null,
-      children: children
+    return new EventListenerNode(
+      new Container(
+        style: _style,
+        inlineStyle: focused ? _focusedInlineStyle : null,
+        children: children
+      ),
+      onPointerDown: (sky.Event e) => keyboard.showByRequest()
     );
   }
 }