Datasets:
Ekhlass
/
flutter_constraints

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197
),
),
),
Expanded(
child: Container(
color: green,
child: const Text(
'Goodbye!',
style: big,
),
),
),
],
);
}
}
class Example27 extends Example {
const Example27({super.key});
@override
final code = 'Row(children:[\n'
' Flexible(\n'
' child: Container(color: red, child: Text(\'…\')))\n'
' Flexible(\n'
' child: Container(color: green, child: Text(\'Goodbye!\'))]';
@override
final String explanation =
'The only difference if you use Flexible instead of Expanded, '
'is that Flexible lets its child be SMALLER than the Flexible width, '
'while Expanded forces its child to have the same width of the Expanded.'
'\n\n'
'But both Expanded and Flexible ignore their children\'s width when sizing themselves.'
'\n\n'
'This means that it\'s IMPOSSIBLE to expand Row children proportionally to their sizes. '
'The Row either uses the exact child\'s width, or ignores it completely when you use Expanded or Flexible.';
@override
Widget build(BuildContext context) {
return Row(
children: [
Flexible(
child: Container(
color: red,
child: const Text(
'This is a very long text that won\'t fit the line.',
style: big,
),
),
),
Flexible(
child: Container(
color: green,
child: const Text(
'Goodbye!',
style: big,
),
),
),
],
);
}
}
class Example28 extends Example {
const Example28({super.key});
@override
final code = 'Scaffold(\n'
' body: Container(color: blue,\n'
' child: Column(\n'
' children: [\n'
' Text(\'Hello!\'),\n'
' Text(\'Goodbye!\')])))';
@override
final String explanation =
'The screen forces the Scaffold to be exactly the same size as the screen, '
'so the Scaffold fills the screen.'
'\n\n'
'The Scaffold tells the Container that it can be any size it wants, but not bigger than the screen.'
'\n\n'
'When a widget tells its child that it can be smaller than a certain size, '
'we say the widget supplies "loose" constraints to its child. More on that later.';
@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
color: blue,
child: const Column(
children: [
Text('Hello!'),
Text('Goodbye!'),
],
),
),
);