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Code Issues Releases Wiki Activity

Secondpage (#97)

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This commit is contained in:
Branden Taylor
2019-06-28 08:28:31 -07:00
committed by Andrew Brogdon
parent b3ef6466fc
commit 2ec8cc3684
1 changed files with 40 additions and 43 deletions
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83
isolate_example/lib/page_two.dart
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@@ -19,9 +19,9 @@ import 'dart:math';
class InfiniteProcessPageStarter extends StatelessWidget { class InfiniteProcessPageStarter extends StatelessWidget {
@override @override
Widget build(BuildContext context) { Widget build(context) {
return ChangeNotifierProvider( return ChangeNotifierProvider(
builder: (context) => IsolateController(), builder: (context) => InfiniteProcessIsolateController(),
child: InfiniteProcessPage(), child: InfiniteProcessPage(),
); );
} }
@@ -29,7 +29,9 @@ class InfiniteProcessPageStarter extends StatelessWidget {
class InfiniteProcessPage extends StatelessWidget { class InfiniteProcessPage extends StatelessWidget {
@override @override
Widget build(BuildContext context) { Widget build(context) {
final controller = Provider.of<InfiniteProcessIsolateController>(context);
return Column( return Column(
mainAxisSize: MainAxisSize.min, mainAxisSize: MainAxisSize.min,
children: [ children: [
@@ -40,21 +42,15 @@ class InfiniteProcessPage extends StatelessWidget {
children: [ children: [
Row( Row(
mainAxisAlignment: MainAxisAlignment.center, mainAxisAlignment: MainAxisAlignment.center,
children: [ children: [newButtons(context)],
newButtons(context),
],
), ),
Row( Row(
mainAxisAlignment: MainAxisAlignment.center, mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center, crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[ children: [
Switch( Switch(
value: value: !controller.paused,
!(Provider.of<IsolateController>(context, listen: true) onChanged: (_) => controller.pausedSwitch(),
.paused),
onChanged: (_) =>
Provider.of<IsolateController>(context, listen: false)
.pausedSwitch(),
activeTrackColor: Colors.lightGreenAccent, activeTrackColor: Colors.lightGreenAccent,
activeColor: Colors.black, activeColor: Colors.black,
inactiveTrackColor: Colors.deepOrangeAccent, inactiveTrackColor: Colors.deepOrangeAccent,
@@ -72,7 +68,7 @@ class InfiniteProcessPage extends StatelessWidget {
} }
} }
class IsolateController extends ChangeNotifier { class InfiniteProcessIsolateController extends ChangeNotifier {
Isolate newIsolate; Isolate newIsolate;
ReceivePort mIceRP; ReceivePort mIceRP;
SendPort newIceSP; SendPort newIceSP;
@@ -83,30 +79,30 @@ class IsolateController extends ChangeNotifier {
bool _running = false; bool _running = false;
bool _paused = false; bool _paused = false;
IsolateController() { InfiniteProcessIsolateController() {
start(); start();
_running = true; _running = true;
} }
void createIsolate() async { Future<void> createIsolate() async {
mIceRP = ReceivePort(); mIceRP = ReceivePort();
newIsolate = await Isolate.spawn(_secondIsolateEntryPoint, mIceRP.sendPort); newIsolate = await Isolate.spawn(_secondIsolateEntryPoint, mIceRP.sendPort);
} }
void listen() async { void listen() {
mIceRP.listen((message) { mIceRP.listen((message) {
if (message is SendPort) { if (message is SendPort) {
newIceSP = message; newIceSP = message;
newIceSP.send(_currentMultiplier.toString()); newIceSP.send(_currentMultiplier);
} else if (message is int) { } else if (message is int) {
setCurrentResults(message); setCurrentResults(message);
} }
}); });
} }
Future start() async { Future<void> start() async {
if (_running == false && _paused == false) { if (_running == false && _paused == false) {
createIsolate(); await createIsolate();
listen(); listen();
_running = true; _running = true;
notifyListeners(); notifyListeners();
@@ -144,20 +140,24 @@ class IsolateController extends ChangeNotifier {
bool get running => _running; bool get running => _running;
List<int> get currentResults => _currentResults; List<int> get currentResults => _currentResults;
void dispose() {
super.dispose();
newIsolate?.kill(priority: Isolate.immediate);
newIsolate = null;
}
} }
class RunningList extends StatelessWidget { class RunningList extends StatelessWidget {
@override @override
Widget build(BuildContext context) { Widget build(context) {
List<int> sums = final controller = Provider.of<InfiniteProcessIsolateController>(context);
Provider.of<IsolateController>(context, listen: true).currentResults;
List<int> sums = controller.currentResults;
return DecoratedBox( return DecoratedBox(
decoration: BoxDecoration( decoration: BoxDecoration(
color: (Provider.of<IsolateController>(context, listen: true).running == color: (controller.running == true && controller.paused == false)
true &&
Provider.of<IsolateController>(context, listen: true).paused ==
false)
? Colors.lightGreenAccent ? Colors.lightGreenAccent
: Colors.deepOrangeAccent, : Colors.deepOrangeAccent,
), ),
@@ -212,51 +212,48 @@ Future<int> brokenUpComputation(int num) {
} }
Widget newButtons(context) { Widget newButtons(context) {
final controller =
Provider.of<InfiniteProcessIsolateController>(context, listen: false);
return ButtonBar( return ButtonBar(
alignment: MainAxisAlignment.center, alignment: MainAxisAlignment.center,
children: [ children: [
RaisedButton( RaisedButton(
child: const Text('Start'), child: const Text('Start'),
elevation: 8.0, elevation: 8.0,
onPressed: () => onPressed: () => controller.start(),
Provider.of<IsolateController>(context, listen: false).start(),
), ),
RaisedButton( RaisedButton(
child: const Text('Terminate'), child: const Text('Terminate'),
elevation: 8.0, elevation: 8.0,
onPressed: () => onPressed: () => controller.terminate(),
Provider.of<IsolateController>(context, listen: false).terminate(),
), ),
], ],
); );
} }
Widget radioButtonWidget(context) { Widget radioButtonWidget(context) {
final controller = Provider.of<InfiniteProcessIsolateController>(context);
return new Row( return new Row(
mainAxisAlignment: MainAxisAlignment.center, mainAxisAlignment: MainAxisAlignment.center,
children: [ children: [
new Radio( new Radio(
value: 1, value: 1,
groupValue: groupValue: controller.multiplier,
Provider.of<IsolateController>(context, listen: true).multiplier, onChanged: (_) => controller.setMultiplier(1),
onChanged: (_) => Provider.of<IsolateController>(context, listen: false)
.setMultiplier(1),
), ),
new Text('1x'), new Text('1x'),
new Radio( new Radio(
value: 2, value: 2,
groupValue: groupValue: controller.multiplier,
Provider.of<IsolateController>(context, listen: true).multiplier, onChanged: (_) => controller.setMultiplier(2),
onChanged: (_) => Provider.of<IsolateController>(context, listen: false)
.setMultiplier(2),
), ),
new Text('2x'), new Text('2x'),
new Radio( new Radio(
value: 3, value: 3,
groupValue: groupValue: controller.multiplier,
Provider.of<IsolateController>(context, listen: true).multiplier, onChanged: (_) => controller.setMultiplier(3),
onChanged: (_) => Provider.of<IsolateController>(context, listen: false)
.setMultiplier(3),
), ),
new Text('3x'), new Text('3x'),
], ],