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29 lines
665 B
Dart
29 lines
665 B
Dart
import 'package:flutter/material.dart';
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typedef OnWidgetSizeChange = void Function(Size size);
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class MeasureSize extends StatefulWidget {
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final Widget child;
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final OnWidgetSizeChange onChange;
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const MeasureSize({
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Key? key,
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required this.onChange,
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required this.child,
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}) : super(key: key);
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@override
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_MeasureSizeState createState() => _MeasureSizeState();
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}
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class _MeasureSizeState extends State<MeasureSize> {
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@override
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Widget build(BuildContext context) {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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final size = context.size;
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if (size != null) widget.onChange(size);
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});
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return widget.child;
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}
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}
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