75 lines
2.1 KiB
Dart
75 lines
2.1 KiB
Dart
import 'dart:io';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:breakpoint/breakpoint.dart';
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/// main is entry point of Flutter application
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void main() {
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// Desktop platforms aren't a valid platform.
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if (!kIsWeb) _setTargetPlatformForDesktop();
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return runApp(MyApp());
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}
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/// If the current platform is desktop, override the default platform to
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/// a supported platform (iOS for macOS, Android for Linux and Windows).
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/// Otherwise, do nothing.
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void _setTargetPlatformForDesktop() {
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TargetPlatform targetPlatform;
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if (Platform.isMacOS) {
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targetPlatform = TargetPlatform.iOS;
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} else if (Platform.isLinux || Platform.isWindows) {
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targetPlatform = TargetPlatform.android;
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}
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if (targetPlatform != null) {
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debugDefaultTargetPlatformOverride = targetPlatform;
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}
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}
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class MyApp extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Flutter Demo',
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theme: ThemeData(
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primarySwatch: Colors.blue,
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),
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home: MyHomePage(),
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);
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}
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}
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class MyHomePage extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return LayoutBuilder(builder: (_, constraints) {
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final _breakpoint = Breakpoint.fromConstraints(constraints);
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return Scaffold(
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appBar: AppBar(
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title: Text('Breakpoint Example: ${_breakpoint.toString()}'),
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),
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body: Container(
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padding: EdgeInsets.all(_breakpoint.gutters),
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child: GridView.builder(
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gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: _breakpoint.columns,
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crossAxisSpacing: _breakpoint.gutters,
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mainAxisSpacing: _breakpoint.gutters,
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),
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itemCount: 200,
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itemBuilder: (_, index) {
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return Container(
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child: Card(
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child: Text(
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index.toString(),
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),
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),
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);
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},
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),
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),
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);
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});
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}
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}
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