stacked_chart

Description:

stacked chart

stacked_chart #
With Shadow

Without Shadow

Animation for the onPressed callback

A flutter package for creating a stack barchart with easy customization.
Installation #
In the dependencies: section of your pubspec.yaml, add the following line:
stacked_chart:
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Then import it as :
import 'package:stacked_chart/stacked_chart.dart';
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Usage #
import 'dart:math';

import 'package:flutter/material.dart';
import 'package:stacked_chart/stacked_chart.dart';

enum WeekDay { monday, tuesday, wednesday, thursday, friday, saturday, sunday }

class WeeklyChartDemo extends StatefulWidget {
const WeeklyChartDemo({Key? key}) : super(key: key);

@override
_WeeklyChartDemoState createState() => _WeeklyChartDemoState();
}

class _WeeklyChartDemoState extends State<WeeklyChartDemo> {
final rng = Random();
List<BookingStatus> weeklyStatus = [];

@override
void initState() {
createRandomWeeklyStatus();
super.initState();
}

void createRandomWeeklyStatus() {
weeklyStatus.clear();
final List<BookingStatus> weeklyData = [];
WeekDay.values
.map(
(day) => weeklyData.add(BookingStatus(
dateTime: DateTime.now().add(
Duration(days: day.index),
),
bookings: {
'Unfilled booking': rng.nextInt(20),
'Filled booking': rng.nextInt(20),
},
)),
)
.toList();
setState(() {
weeklyStatus = weeklyData;
});
}

@override
Widget build(BuildContext context) {
return GestureDetector(
onTap: createRandomWeeklyStatus,
child: StackedChart(
data: weeklyStatus,
size: const Size(300, 150),
showLabel: true,
),
);
}
}

class BookingStatus extends ChartData<LabelData, int>
implements Comparable<BookingStatus> {
final DateTime dateTime;
final Map<String, int> bookings;

static Map<LabelData, int> convertBookingToMapOfLabelDataInt(
Map<String, int> bookings) {
final Map<LabelData, int> convertedData = {};
bookings.entries
.map((e) => convertedData.addAll({LabelData(e.key): e.value}))
.toList();
return convertedData;
}

int get totalBookingCount =>
bookings.values.reduce((total, value) => total = total + value);

BookingStatus({required this.dateTime, this.bookings = const {}})
: super(
labelWithValue: convertBookingToMapOfLabelDataInt(bookings),
barLabel: dateTime.day.toString());

@override
int compareTo(BookingStatus other) => dateTime.compareTo(other.dateTime);
}
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