Datasets:
Ekhlass
/
flutter_constraints

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197
}
}
class Example24 extends Example {
const Example24({super.key});
@override
final code = 'Row(children:[\n'
' Container(color: red, child: Text(\'…\'))\n'
' Container(color: green, child: Text(\'Goodbye!\'))]';
@override
final String explanation =
'Since the Row won\'t impose any constraints onto its children, '
'it\'s quite possible that the children might be too big to fit the available width of the Row.'
'In this case, just like an UnconstrainedBox, the Row displays the "overflow warning".';
@override
Widget build(BuildContext context) {
return Row(
children: [
Container(
color: red,
child: const Text(
'This is a very long text that '
'won\'t fit the line.',
style: big,
),
),
Container(color: green, child: const Text('Goodbye!', style: big)),
],
);
}
}
class Example25 extends Example {
const Example25({super.key});
@override
final code = 'Row(children:[\n'
' Expanded(\n'
' child: Container(color: red, child: Text(\'…\')))\n'
' Container(color: green, child: Text(\'Goodbye!\'))]';
@override
final String explanation =
'When a Row\'s child is wrapped in an Expanded widget, the Row won\'t let this child define its own width anymore.'
'\n\n'
'Instead, it defines the Expanded width according to the other children, and only then the Expanded widget forces the original child to have the Expanded\'s width.'
'\n\n'
'In other words, once you use Expanded, the original child\'s width becomes irrelevant, and is ignored.';
@override
Widget build(BuildContext context) {
return Row(
children: [
Expanded(
child: Center(
child: Container(
color: red,
child: const Text(
'This is a very long text that won\'t fit the line.',
style: big,
),
),
),
),
Container(color: green, child: const Text('Goodbye!', style: big)),
],
);
}
}
class Example26 extends Example {
const Example26({super.key});
@override
final code = 'Row(children:[\n'
' Expanded(\n'
' child: Container(color: red, child: Text(\'…\')))\n'
' Expanded(\n'
' child: Container(color: green, child: Text(\'Goodbye!\'))]';
@override
final String explanation =
'If all of Row\'s children are wrapped in Expanded widgets, each Expanded has a size proportional to its flex parameter, '
'and only then each Expanded widget forces its child to have the Expanded\'s width.'
'\n\n'
'In other words, Expanded ignores the preferred width of its children.';
@override
Widget build(BuildContext context) {
return Row(
children: [
Expanded(
child: Container(
color: red,
child: const Text(
'This is a very long text that won\'t fit the line.',
style: big,