home.dart
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
class HomePageScaffold extends StatelessWidget with SU {
const HomePageScaffold({Key? key, this.title = ''}) : super(key: key);
void printScreenInformation(BuildContext context) {
print('Device Size:${Size(1.sw, 1.sh)}');
print('Device pixel density:${ScreenUtil().pixelRatio}');
print('Bottom safe zone distance dp:${ScreenUtil().bottomBarHeight}dp');
print('Status bar height dp:${ScreenUtil().statusBarHeight}dp');
print('The ratio of actual width to UI design:${ScreenUtil().scaleWidth}');
print(
'The ratio of actual height to UI design:${ScreenUtil().scaleHeight}');
print('System font scaling:${ScreenUtil().textScaleFactor}');
print('0.5 times the screen width:${0.5.sw}dp');
print('0.5 times the screen height:${0.5.sh}dp');
print('Screen orientation:${ScreenUtil().orientation}');
}
@override
Widget build(BuildContext context) {
printScreenInformation(context);
/// Uncomment if you wanna force current widget to be rebuilt with updated values
/// Must use it if you use the second method, or if you use ScreenUtilInit's child.
/// Note: don't use it along with ScreenUtil.init()
// ScreenUtil.registerToBuild(context);
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
RSizedBox.square(dimension: 20),
Row(
children: <Widget>[
// Using Extensions
Container(
padding: EdgeInsets.all(10.w),
width: 0.5.sw,
height: 200.h,
color: Colors.red,
child: Text(
'My actual width: ${0.5.sw}dp \n\n'
'My actual height: ${200.h}dp',
style: TextStyle(
color: Colors.white,
fontSize: 12.sp,
),
),
),
// Without using Extensions
Container(
color: Colors.blue,
constraints: BoxConstraints(maxWidth: 180, minHeight: 200).hw,
padding: EdgeInsets.all(10.w),
child: Text(
'My design draft width: 180dp\n\n'
'My design draft height: 200dp',
style: TextStyle(
color: Colors.white,
fontSize: ScreenUtil().setSp(12),
),
),
),
],
),
Container(
padding: EdgeInsets.all(10).w,
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(16).w),
color: Colors.green,
),
width: 100.r,
height: 100.r,
child: Text(
'I am a square with a side length of 100',
style: TextStyle(
color: Colors.white,
fontSize: 12.sp,
),
),
),
Padding(
padding: const EdgeInsets.all(18).r,
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
ElevatedButton(
onPressed: () {
showDialog(
context: context,
builder: (_) {
return Dialog(
child: Padding(
padding: EdgeInsets.all(12.r),
child: Column(
children: [
const Text('Dialog'),
Spacer(),
TextField(),
],
),
),
);
},
);
},
child: const Text('Show Dialog'),
),
18.verticalSpace,
ElevatedButton(
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) {
return const HomePageScaffold();
}),
);
},
child: const Text('Go to next page'),
),
18.verticalSpace,
ElevatedButton(
onPressed: () {
showModalBottomSheet<void>(
context: context,
builder: (BuildContext context) {
return Container(
height: 200.w +
MediaQuery.of(context).viewInsets.bottom,
color: Colors.amber,
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
const Text('Modal BottomSheet'),
Spacer(),
TextField(),
ElevatedButton(
child: const Text('Close BottomSheet'),
onPressed: Navigator.of(context).pop,
),
SizedBox(
height: MediaQuery.of(context)
.viewInsets
.bottom),
],
),
),
);
},
);
},
child: const Text('Open BottomSheet'),
),
18.verticalSpace,
TextField(
decoration: InputDecoration(
border: OutlineInputBorder(),
),
),
18.verticalSpace,
Text('Device width:${ScreenUtil().screenWidth}dp'),
Text('Device height:${ScreenUtil().screenHeight}dp'),
Text('Device pixel density:${ScreenUtil().pixelRatio}'),
Text(
'Bottom safe zone distance:${ScreenUtil().bottomBarHeight}dp'),
Text('Status bar height:${ScreenUtil().statusBarHeight}dp'),
Text(
'The ratio of actual width to UI design:${ScreenUtil().scaleWidth}'),
Text(
'The ratio of actual height to UI design:${ScreenUtil().scaleHeight}'),
10.verticalSpace,
Text(
'System font scaling factor:${ScreenUtil().textScaleFactor}'),
5.verticalSpace,
Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Text(
'16sp, will not change with the system.',
style: TextStyle(
color: Colors.black,
fontSize: 16.sp,
),
textScaleFactor: 1.0,
),
Text(
'16sp,if data is not set in MediaQuery,my font size will change with the system.',
style: TextStyle(
color: Colors.black,
fontSize: 16.sp,
),
),
],
),
],
),
),
],
),
),
floatingActionButton: FloatingActionButton.extended(
onPressed: () {
SystemChrome.setPreferredOrientations([
MediaQuery.of(context).orientation == Orientation.portrait
? DeviceOrientation.landscapeRight
: DeviceOrientation.portraitUp,
]);
// setState(() {});
},
label: const Text('Rotate'),
),
);
}
final String title;
}