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Merge pull request #1380 from abarth/raw_keyboard_listener

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Add RawKeyboardListener
This commit is contained in:
Adam Barth 2016-01-25 20:48:46 -08:00
commit dc7451d642
3 changed files with 130 additions and 55 deletions
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108
examples/widgets/raw_keyboard.dart
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@ -1,81 +1,79 @@
// 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.
// Copyright 2016 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 '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;
import 'package:sky_services/sky/input_event.mojom.dart' as mojom;
GlobalKey _key = new GlobalKey();
void main() {
runApp(
new MaterialApp(
title: "Hardware Key Demo",
routes: {
'/': (RouteArguments args) => const HardwareKeyDemo()
routes: <String, RouteBuilder>{
'/': (RouteArguments args) {
return new Scaffold(
toolBar: new ToolBar(
center: new Text("Hardware Key Demo")
),
body: new Material(
child: new RawKeyboardDemo(
key: _key
)
)
);
}
}
)
);
}
class HardwareKeyDemo extends StatefulComponent {
const HardwareKeyDemo();
HardwareKeyDemoState createState() => new HardwareKeyDemoState();
class RawKeyboardDemo extends StatefulComponent {
RawKeyboardDemo({ GlobalKey key }) : super(key: key);
_HardwareKeyDemoState createState() => new _HardwareKeyDemoState();
}
class HardwareKeyDemoState extends State<HardwareKeyDemo> implements mojo.RawKeyboardListener {
class _HardwareKeyDemoState extends State<RawKeyboardDemo> {
mojom.InputEvent _event = null;
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) {
void _handleKey(mojom.InputEvent event) {
setState(() {
_event = event;
});
}
Widget _buildBody() {
if (_event == null) {
return new Center(
child: new Text("Press a key", style: Typography.black.display1)
Widget build(BuildContext context) {
bool focused = Focus.at(context);
Widget child;
if (!focused) {
child = new GestureDetector(
onTap: () {
Focus.moveTo(config.key);
},
child: new Center(
child: new Text('Tap to focus', style: Typography.black.display1)
)
);
} else if (_event == null) {
child = new Center(
child: new Text('Press a key', style: Typography.black.display1)
);
} else {
child = new Column(
children: <Widget>[
new Text('${_event.type}', style: Typography.black.body2),
new Text('${_event.keyData.keyCode}', style: Typography.black.display4)
],
justifyContent: FlexJustifyContent.center
);
}
return new Column(
children: <Widget>[
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()
)
return new RawKeyboardListener(
focused: focused,
onKey: _handleKey,
child: child
);
}
}

76
packages/flutter/lib/src/widgets/raw_keyboard_listener.dart Normal file
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@ -0,0 +1,76 @@
// Copyright 2016 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 'package:flutter/services.dart';
import 'package:sky_services/raw_keyboard/raw_keyboard.mojom.dart' as mojom;
import 'package:sky_services/sky/input_event.mojom.dart' as mojom;
import 'basic.dart';
import 'framework.dart';
class RawKeyboardListener extends StatefulComponent {
RawKeyboardListener({
Key key,
this.focused: false,
this.onKey,
this.child
}) : super(key: key) {
assert(child != null);
}
final bool focused;
final ValueChanged<mojom.InputEvent> onKey;
final Widget child;
_RawKeyboardListenerState createState() => new _RawKeyboardListenerState();
}
class _RawKeyboardListenerState extends State<RawKeyboardListener> implements mojom.RawKeyboardListener {
void initState() {
super.initState();
_attachOrDetachKeyboard();
}
mojom.RawKeyboardListenerStub _stub;
void didUpdateConfig(RawKeyboardListener oldConfig) {
_attachOrDetachKeyboard();
}
void dispose() {
_detachKeyboard();
super.dispose();
}
void _attachOrDetachKeyboard() {
if (config.focused && _stub == null)
_attachKeyboard();
else if (!config.focused && _stub != null)
_detachKeyboard();
}
void _attachKeyboard() {
assert(_stub == null);
_stub = new mojom.RawKeyboardListenerStub.unbound()..impl = this;
mojom.RawKeyboardServiceProxy keyboard = new mojom.RawKeyboardServiceProxy.unbound();
shell.connectToService(null, keyboard);
keyboard.ptr.addListener(_stub);
keyboard.close();
}
void _detachKeyboard() {
assert(_stub != null);
_stub.close();
_stub = null;
}
void onKey(mojom.InputEvent event) {
if (config.onKey != null)
config.onKey(event);
}
Widget build(BuildContext context) {
return config.child;
}
}

1
packages/flutter/lib/widgets.dart
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@ -31,6 +31,7 @@ export 'src/widgets/pageable_list.dart';
export 'src/widgets/pages.dart';
export 'src/widgets/performance_overlay.dart';
export 'src/widgets/placeholder.dart';
export 'src/widgets/raw_keyboard_listener.dart';
export 'src/widgets/routes.dart';
export 'src/widgets/scrollable.dart';
export 'src/widgets/scrollable_grid.dart';