Starter/samples
1
0
Fork 0
mirror of https://github.com/flutter/samples.git synced 2025-11-11 07:18:15 +00:00
Code Issues Releases Wiki Activity

Quarterly maintenance on isolate_example (#142)

Browse Source
This commit is contained in:
Andrew Brogdon
2019-09-13 10:25:16 -07:00
committed by GitHub
parent 7a63156650
commit 0f3721f696
12 changed files with 245 additions and 230 deletions
Download Patch File Download Diff File Expand all files Collapse all files

120
isolate_example/lib/page_three.dart
View File

@@ -11,9 +11,11 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import 'dart:typed_data';
import 'dart:isolate';
import 'dart:math';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
@@ -30,6 +32,8 @@ class DataTransferPageStarter extends StatelessWidget {
class DataTransferPage extends StatelessWidget {
@override
Widget build(context) {
final controller = Provider.of<DataTransferIsolateController>(context);
return SafeArea(
child: Column(
mainAxisSize: MainAxisSize.min,
@@ -42,17 +46,34 @@ class DataTransferPage extends StatelessWidget {
padding: EdgeInsets.all(8),
),
LinearProgressIndicator(
value: Provider.of<DataTransferIsolateController>(context)
.progressPercent,
value: controller.progressPercent,
backgroundColor: Colors.grey[200],
),
Expanded(child: RunningList()),
Expanded(
child: RunningList(),
),
Column(
mainAxisSize: MainAxisSize.min,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [createButtons(context)],
RaisedButton(
child: const Text('Transfer Data to 2nd Isolate'),
color: (controller.runningTest == 1)
? Colors.blueAccent
: Colors.grey[300],
onPressed: () => controller.generateRandomNumbers(false),
),
RaisedButton(
child: const Text('Transfer Data with TransferableTypedData'),
color: (controller.runningTest == 2)
? Colors.blueAccent
: Colors.grey[300],
onPressed: () => controller.generateRandomNumbers(true),
),
RaisedButton(
child: const Text('Generate on 2nd Isolate'),
color: (controller.runningTest == 3)
? Colors.blueAccent
: Colors.grey[300],
onPressed: controller.generateOnSecondaryIsolate,
),
],
),
@@ -63,33 +84,39 @@ class DataTransferPage extends StatelessWidget {
}
class DataTransferIsolateController extends ChangeNotifier {
Isolate _newIsolate;
ReceivePort _mIceRP;
SendPort _newIceSP;
Isolate _isolate;
ReceivePort _incomingReceivePort;
SendPort _outgoingSendPort;
final currentProgress = <String>[];
int runningTest = 0;
Stopwatch _timer = Stopwatch();
double progressPercent = 0;
Isolate get newIsolate => _isolate;
bool get running => runningTest != 0;
DataTransferIsolateController() {
createIsolate();
listen();
}
Future<void> createIsolate() async {
_mIceRP = ReceivePort();
_newIsolate =
await Isolate.spawn(_secondIsolateEntryPoint, _mIceRP.sendPort);
_incomingReceivePort = ReceivePort();
_isolate = await Isolate.spawn(
_secondIsolateEntryPoint, _incomingReceivePort.sendPort);
}
void listen() {
_mIceRP.listen((dynamic message) {
if (message is SendPort) _newIceSP = message;
_incomingReceivePort.listen((dynamic message) {
if (message is SendPort) {
_outgoingSendPort = message;
}
if (message is int) {
currentProgress.insert(
0, '$message% - ${_timer.elapsedMilliseconds / 1000} Sec');
0, '$message% - ${_timer.elapsedMilliseconds / 1000} seconds');
progressPercent = message / 100;
}
@@ -109,7 +136,7 @@ class DataTransferIsolateController extends ChangeNotifier {
_timer = Stopwatch();
_timer.start();
_newIceSP.send('start');
_outgoingSendPort.send('start');
notifyListeners();
}
@@ -150,26 +177,22 @@ class DataTransferIsolateController extends ChangeNotifier {
Future<void> sendNumbers(dynamic numList) async {
return Future<void>(() {
_newIceSP.send(numList);
_outgoingSendPort.send(numList);
});
}
Isolate get newIsolate => _newIsolate;
bool get running => runningTest != 0;
void dispose() {
super.dispose();
_newIsolate?.kill(priority: Isolate.immediate);
_newIsolate = null;
_isolate?.kill(priority: Isolate.immediate);
_isolate = null;
}
}
class RunningList extends StatelessWidget {
@override
Widget build(BuildContext context) {
final controller = Provider.of<DataTransferIsolateController>(context);
final progress = controller.currentProgress;
final progress =
Provider.of<DataTransferIsolateController>(context).currentProgress;
return DecoratedBox(
decoration: BoxDecoration(
@@ -234,7 +257,10 @@ Iterable<int> createNums() sync* {
}
Future<void> generateAndSum(
SendPort callerSP, Iterable<int> iter, int length) async {
SendPort callerSP,
Iterable<int> iter,
int length,
) async {
int sum = 0;
int count = 1;
@@ -248,41 +274,3 @@ Future<void> generateAndSum(
return sum;
}
Widget createButtons(BuildContext context) {
final controller =
Provider.of<DataTransferIsolateController>(context, listen: false);
return ButtonBar(
alignment: MainAxisAlignment.center,
children: [
Column(
children: [
RaisedButton(
child: const Text('Transfer Data to 2nd Isolate'),
elevation: 8.0,
color: (controller.runningTest == 1)
? Colors.blueAccent
: Colors.grey[300],
onPressed: () => controller.generateRandomNumbers(false),
),
RaisedButton(
child: const Text('Transfer Data with TransferableTypedData'),
elevation: 8.0,
color: (controller.runningTest == 2)
? Colors.blueAccent
: Colors.grey[300],
onPressed: () => controller.generateRandomNumbers(true),
),
RaisedButton(
child: const Text('Generate on 2nd Isolate'),
elevation: 8.0,
color: (controller.runningTest == 3)
? Colors.blueAccent
: Colors.grey[300],
onPressed: controller.generateOnSecondaryIsolate,
),
],
),
],
);
}