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November 19, 2019 16:20
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Modifying cross axis alignment
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import 'package:flutter_web/material.dart'; | |
import 'package:flutter_web_test/flutter_web_test.dart'; | |
import 'package:flutter_web_ui/ui.dart' as ui; | |
class MyWidget extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return Row( | |
mainAxisAlignment: MainAxisAlignment.spaceAround, | |
crossAxisAlignment: CrossAxisAlignment.center, | |
children: [ | |
BlueBox(), | |
BiggerBlueBox(), | |
BlueBox(), | |
], | |
); | |
} | |
} | |
class BlueBox extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return Container( | |
width: 50, | |
height: 50, | |
decoration: BoxDecoration( | |
color: Colors.blue, | |
border: Border.all(), | |
), | |
); | |
} | |
} | |
class BiggerBlueBox extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return Container( | |
width: 50, | |
height: 100, | |
decoration: BoxDecoration( | |
color: Colors.blue, | |
border: Border.all(), | |
), | |
); | |
} | |
} |
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class MyApp extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return Directionality( | |
textDirection: TextDirection.ltr, | |
child: Container( | |
color: Color(0xffeeeeee), | |
child: Center( | |
child: Container( | |
child: MyWidget(), | |
color: Color(0xffcccccc), | |
), | |
), | |
), | |
); | |
} | |
} | |
Future<void> main() async { | |
await ui.webOnlyInitializePlatform(); | |
runApp(MyApp()); | |
final controller = LiveWidgetController(WidgetsBinding.instance); | |
final rows = controller.widgetList(find.byType(Row)); | |
if (rows.length == 0) { | |
_result(false, ['Couldn\'t find a Row!']); | |
return; | |
} | |
if (rows.length > 1) { | |
_result(false, ['Found ${rows.length} Rows, rather than just one.']); | |
return; | |
} | |
final row = rows.first as Row; | |
if (row.children.length != 3 || row.children.any((w) => w is! BlueBox && w is! BiggerBlueBox)) { | |
_result(false, ['The Row should have three children, all BlueBox or BiggerBlueBox widgets.']); | |
return; | |
} | |
if (row.crossAxisAlignment == CrossAxisAlignment.start) { | |
_result(true, ['The BlueBox and BiggerBlueBox widgets are positioned at the top of the cross axis.']); | |
} else if (row.crossAxisAlignment == CrossAxisAlignment.end) { | |
_result(true, ['The BlueBox and BiggerBlueBox widgets are positioned at the bottom of the cross axis']); | |
} else if (row.crossAxisAlignment == CrossAxisAlignment.center) { | |
_result(false, ['The widgets are positioned at the middle of the cross axis. Change CrossAxisAlignment.center to CrossAxisAlignment.start.']); | |
} else if (row.crossAxisAlignment == CrossAxisAlignment.stretch) { | |
_result(true, ['The BlueBox and BiggerBlueBox widgets are stretched across the cross axis. Change the Row to a Column, and run again.']); | |
} else if(row.crossAxisAlignment == CrossAxisAlignment.baseline) { | |
_result(false, ['Couldn\t find a text class.']); | |
} | |
} |
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