133 lines
No EOL
4.4 KiB
Dart
133 lines
No EOL
4.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:numberpicker/numberpicker.dart';
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import 'package:ohthatsa/other/AppDrawer.dart';
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import 'package:ohthatsa/util/DayCalculator.dart';
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import 'package:ohthatsa/util/Months.dart';
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class LeapInstructionPage extends StatefulWidget {
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@override
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_LeapInstructionPageState createState() => _LeapInstructionPageState();
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}
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class _LeapInstructionPageState extends State<LeapInstructionPage> {
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int year;
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bool isLeapYear;
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bool divBy4;
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bool divBy100;
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bool divBy400;
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@override
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void initState(){
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super.initState();
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this.setYear(DateTime.now().year);
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}
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void setYear(int newYear){
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year = newYear;
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isLeapYear = DayCalculator.isLeapYear(year);
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divBy4 = (year % 4) == 0;
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divBy100 = (year % 100) == 0;
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divBy400 = (year % 400) == 0;
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setState(() {});
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}
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static const textStyle = TextStyle(
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fontSize: 20
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);
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static const pageNum = TextStyle(
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color: Colors.grey,
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fontSize: 20
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);
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static const pageNumCurrent = TextStyle(
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color: Colors.blue,
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fontSize: 20
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);
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@override
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Widget build(BuildContext context){
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return Scaffold(
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drawer: AppDrawer(),
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appBar: AppBar(
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title: Text("Leap Year Instructions")
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),
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body: PageView(
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children: <Widget>[
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Container(
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padding: EdgeInsets.fromLTRB(0, 50, 0, 10),
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child:Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text("A year is a leap year if...", style: textStyle),
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Text("It is divisible by 4, unless...", style: textStyle),
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Text("It's also divisible by 100, unless...", style: textStyle),
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Text("It's divisible by 400", style: textStyle),
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Spacer(),
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text("1", style: pageNumCurrent),
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Text(" - ", style: pageNum),
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Text("2", style: pageNum),
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],
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)
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]
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)
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),
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Container(
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padding: EdgeInsets.fromLTRB(0, 50, 0, 10),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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NumberPicker.integer(
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initialValue: year,
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minValue: 0,
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maxValue: 10000,
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onChanged: (newYear) => { this.setYear(newYear) }
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),
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Visibility(
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visible: divBy4,
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child: Text(year.toString() + " is divisible by 4", style: textStyle)
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),
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Visibility(
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visible: divBy100,
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child: Column(
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children: <Widget>[
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Text("But...", style: textStyle),
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Text(year.toString() + " is also divisible by 100", style: textStyle)
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],
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)
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),
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Visibility(
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visible: divBy400,
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child: Column(
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children: <Widget>[
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Text("But...", style: textStyle),
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Text(year.toString() + " is also divisible by 400", style: textStyle)
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],
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)
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),
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text("So " + year.toString() + " is", style: textStyle),
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Text(this.isLeapYear ? " " : " not ", style: textStyle),
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Text("a leap year", style: textStyle)
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],
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),
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Spacer(),
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text("1", style: pageNum),
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Text(" - ", style: pageNum),
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Text("2", style: pageNumCurrent),
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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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} |