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import 'dart:async';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter_homescreen/layout_size_helper.dart';
// The Dashboard page.
class DashboardPage extends StatefulWidget {
DashboardPage({Key? key}) : super(key: key);
@override
_DashboardPageState createState() => _DashboardPageState();
}
class _DashboardPageState extends State<DashboardPage> {
late Timer _timer;
double speed = 20;
// between 0 and 1.0
double rpm = 0.2;
// between 0 and 1.0
double fuel = 0.2;
@override
void initState() {
_timer = new Timer.periodic(
Duration(milliseconds: 10),
(Timer timer) {
setState(() {
double now = DateTime.now().millisecondsSinceEpoch / 2000;
speed = 50 + 40 * sin(now);
rpm = 0.5 + sin(now) / 3.0;
fuel = 0.6 + cos(now) / 4.0;
});
},
);
// Animate the values for the demo.
// Eventually, we will get the state of the car from the API.
super.initState();
}
@override
void dispose() {
_timer.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
var sizeHelper = LayoutSizeHelper(context);
return Container(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topRight,
end: Alignment.bottomLeft,
colors: [Colors.teal.shade900, Colors.grey.shade900])),
constraints: BoxConstraints.expand(),
alignment: Alignment.center,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
height: sizeHelper.largeIconSize * 1,
width: sizeHelper.largeIconSize * 2,
decoration: BoxDecoration(
border: Border.all(
color: Theme.of(context).primaryColorLight,
width: sizeHelper.defaultBorder,
),
borderRadius: BorderRadius.all(
Radius.circular(sizeHelper.largeIconSize / 2.0))),
child: Center(
child: Text(
'${speed.floor()} kpm',
style: Theme.of(context).textTheme.headline2,
),
),
),
_RPMWidget(rpm),
_FuelWidget(fuel),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.end,
children: [
_TireWidget('Left front tire', 21, CrossAxisAlignment.end),
_TireWidget('Left rear tire', 23, CrossAxisAlignment.end),
],
),
Image.asset(
'images/HMI_Dashboard_Car_720.png',
width: 2.0 * sizeHelper.largeIconSize,
fit: BoxFit.contain,
),
Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_TireWidget('Right front tire', 21, CrossAxisAlignment.start),
_TireWidget('Right rear tire', 23, CrossAxisAlignment.start),
],
),
],
),
],
),
);
}
}
// The RPM indicator.
class _RPMWidget extends StatelessWidget {
final double rpm;
_RPMWidget(this.rpm);
@override
Widget build(BuildContext context) {
var sizeHelper = LayoutSizeHelper(context);
return Stack(
alignment: Alignment.center,
children: [
Text(
'RPM',
style: Theme.of(context).textTheme.headline4,
),
Container(
height: sizeHelper.largeIconSize * 1.5,
width: sizeHelper.largeIconSize * 1.5,
child: RotatedBox(
quarterTurns: 2,
child: CircularProgressIndicator(
value: rpm,
color: HSLColor.fromColor(Colors.redAccent)
.withSaturation(rpm)
.toColor(),
strokeWidth: sizeHelper.largeIconSize / 2.0,
semanticsLabel: 'RPM indicator',
),
),
)
],
);
}
}
// The fuel indicator.
class _FuelWidget extends StatelessWidget {
final double fuel;
_FuelWidget(this.fuel);
@override
Widget build(BuildContext context) {
var sizeHelper = LayoutSizeHelper(context);
return Row(
children: [
Container(
height: sizeHelper.largeIconSize / 4.0,
width: sizeHelper.largeIconSize / 2.0,
child: Center(
child: Text(
'Fuel',
style: Theme.of(context).textTheme.headline4,
),
),
),
Container(
height: sizeHelper.largeIconSize / 4.0,
width: sizeHelper.largeIconSize * 1.5,
margin: EdgeInsets.fromLTRB(
0, sizeHelper.largePadding, 0, sizeHelper.largePadding),
child: LinearProgressIndicator(
value: fuel,
color: HSLColor.fromColor(Colors.blueAccent)
.withSaturation(fuel)
.toColor(),
semanticsLabel: 'RPM indicator',
),
)
],
);
}
}
// The small indicator for the state of each tire.
class _TireWidget extends StatelessWidget {
final String label;
final int value;
final CrossAxisAlignment crossAlign;
_TireWidget(this.label, this.value, this.crossAlign);
@override
Widget build(BuildContext context) {
return Column(
crossAxisAlignment: crossAlign,
children: [
Text(
label,
style: Theme.of(context).textTheme.headline6,
),
Text(
'$value PSI',
style: Theme.of(context).textTheme.headline4,
),
],
);
}
}
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