Raw keyboard example

examples/widgets/raw_keyboard.dart

+// Copyright (c) 2015, the Flutter 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 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import 'package:sky_services/raw_keyboard/raw_keyboard.mojom.dart' as mojo;
+import 'package:sky_services/sky/input_event.mojom.dart' as mojo;
+
+void main() {
+  runApp(
+    new MaterialApp(
+      title: "Hardware Key Demo",
+      routes: {
+        '/': (RouteArguments args) => const HardwareKeyDemo()
+      }
+    )
+  );
+}
+
+class HardwareKeyDemo extends StatefulComponent {
+  const HardwareKeyDemo();
+  HardwareKeyDemoState createState() => new HardwareKeyDemoState();
+}
+
+class HardwareKeyDemoState extends State<HardwareKeyDemo> implements mojo.RawKeyboardListener {
+
+  mojo.InputEvent _event = null;
+
+  void initState() {
+    mojo.RawKeyboardServiceProxy rawKeyboardService = new mojo.RawKeyboardServiceProxy.unbound();
+    try {
+      shell.connectToService(null, rawKeyboardService);
+      mojo.RawKeyboardListenerStub listener = new mojo.RawKeyboardListenerStub.unbound()
+        ..impl = this;
+      rawKeyboardService.ptr.addListener(listener);
+    } finally {
+      rawKeyboardService.close();
+    }
+    super.initState();
+  }
+
+  void onKey(mojo.InputEvent event) {
+    setState(() {
+      _event = event;
+    });
+  }
+
+  Widget _buildBody() {
+    if (_event == null) {
+      return new Center(
+        child: new Text("Press a key", style: Typography.black.display1)
+      );
+    }
+    return new Column([
+        new Text(
+          '${_event?.type}',
+          style: Typography.black.body2
+        ),
+        new Text(
+          '${_event?.keyData?.keyCode}',
+          style: Typography.black.display4
+        )
+    ], justifyContent: FlexJustifyContent.center);
+  }
+
+  Widget build(BuildContext context)  {
+    return new Scaffold(
+      toolBar: new ToolBar(
+        center: new Text("Hardware Key Demo")
+      ),
+      body: new Material(
+        child: _buildBody()
+      )
+    );
+  }
+}