586 lines
21 KiB
Dart
586 lines
21 KiB
Dart
import 'package:currency_picker/currency_picker.dart';
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import 'package:dynamic_color/dynamic_color.dart';
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import 'package:fl_chart/fl_chart.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_gen/gen_l10n/app_localizations.dart';
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import 'package:intl/intl.dart';
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import 'package:prasule/api/category.dart';
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import 'package:prasule/api/wallet_entry.dart';
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import 'package:prasule/util/get_last_date.dart';
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import 'package:prasule/util/text_color.dart';
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/// Monthly/Yearly expense/income [LineChart]
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class ExpensesLineChart extends StatelessWidget {
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/// Monthly/Yearly expense/income [LineChart]
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const ExpensesLineChart({
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required this.date,
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required this.locale,
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required this.expenseData,
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required this.incomeData,
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required this.currency,
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super.key,
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this.yearly = false,
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});
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/// If the graph will be shown yearly
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final bool yearly;
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/// Selected date
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///
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/// Used to get either month or year
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final DateTime date;
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/// Current locale
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///
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/// Used mainly for formatting
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final String locale;
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/// The expense data used for the graph
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final List<double> expenseData;
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/// Wallet currency
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///
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/// Used to show currency symbol
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final Currency currency;
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/// Expense data, but sorted
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List<double> get expenseDataSorted =>
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List<double>.from(expenseData)..sort((a, b) => a.compareTo(b));
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/// Income data used for the graph
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final List<double> incomeData;
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/// Income data, but sorted
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List<double> get incomeDataSorted =>
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List<double>.from(incomeData)..sort((a, b) => a.compareTo(b));
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/// Calculates maxY for the graph
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double get maxY {
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if (incomeData.isEmpty) return expenseDataSorted.last;
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if (expenseData.isEmpty) return incomeDataSorted.last;
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if (expenseDataSorted.last > incomeDataSorted.last) {
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return expenseDataSorted.last;
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} else {
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return incomeDataSorted.last;
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}
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}
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@override
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Widget build(BuildContext context) {
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return LineChart(
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LineChartData(
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lineTouchData: LineTouchData(
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touchTooltipData: LineTouchTooltipData(
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getTooltipColor: (group) =>
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Theme.of(context).colorScheme.secondaryContainer,
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getTooltipItems: (spots) => List<LineTooltipItem>.generate(
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spots.length,
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(index) => LineTooltipItem(
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// Changes what's rendered on the tooltip
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// when clicked in the chart
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(spots[index].barIndex == 0 &&
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incomeData.isNotEmpty) // income chart
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? (yearly
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? AppLocalizations.of(context).incomeForMonth(
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DateFormat.MMMM(locale).format(
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DateTime(
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date.year,
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spots[index].x.toInt() + 1,
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),
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),
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(spots[index].y),
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)
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: AppLocalizations.of(context).incomeForDay(
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(spots[index].y),
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))
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: (yearly // expense chart
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? AppLocalizations.of(context).expensesForMonth(
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DateFormat.MMMM(locale).format(
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DateTime(
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date.year,
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spots[index].x.toInt() + 1,
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),
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),
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(spots[index].y),
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)
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: AppLocalizations.of(context).expensesForDay(
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(spots[index].y),
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)),
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TextStyle(color: spots[index].bar.color),
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children: [
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if (!yearly)
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TextSpan(
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text:
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"\n${DateFormat.yMMMMd(locale).format(DateTime(date.year, date.month, spots[index].spotIndex + 1))}",
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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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maxY: maxY,
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maxX: yearly
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? 11
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: date.lastDay.toDouble() -
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1, // remove 1 because we are indexing from 0
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minY: 0,
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minX: 0,
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lineBarsData: [
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if (incomeData.isNotEmpty)
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LineChartBarData(
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isCurved: true,
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barWidth: 8,
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isStrokeCapRound: true,
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dotData: const FlDotData(show: false),
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belowBarData: BarAreaData(),
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color: ((MediaQuery.of(context).platformBrightness ==
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Brightness.dark)
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? Colors.green.shade300
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: Colors.green)
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.harmonizeWith(Theme.of(context).colorScheme.primary),
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spots: List.generate(
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yearly ? 12 : date.lastDay,
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(index) => FlSpot(index.toDouble(), incomeData[index]),
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),
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),
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if (expenseData.isNotEmpty)
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LineChartBarData(
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isCurved: true,
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barWidth: 8,
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isStrokeCapRound: true,
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dotData: const FlDotData(show: false),
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belowBarData: BarAreaData(),
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color: ((MediaQuery.of(context).platformBrightness ==
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Brightness.dark)
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? Colors.red.shade300
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: Colors.red)
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.harmonizeWith(Theme.of(context).colorScheme.primary),
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spots: List.generate(
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yearly
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? 12
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: date.lastDay, // no -1 because it's the length, not index
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(index) => FlSpot(index.toDouble(), expenseData[index]),
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),
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),
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], // actual data
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titlesData: FlTitlesData(
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rightTitles: const AxisTitles(),
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topTitles: const AxisTitles(),
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leftTitles: AxisTitles(
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sideTitles: SideTitles(
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reservedSize: ((expenseDataSorted.isNotEmpty &&
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NumberFormat.compact(locale: locale)
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.format(expenseDataSorted.last)
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.length >=
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5) ||
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(incomeDataSorted.isNotEmpty &&
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NumberFormat.compact(locale: locale)
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.format(incomeDataSorted.last)
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.length >=
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5))
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? 50
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: 25,
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showTitles: true,
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),
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),
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bottomTitles: AxisTitles(
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sideTitles: SideTitles(
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reservedSize: 30,
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showTitles: true,
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getTitlesWidget: (value, meta) {
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String text;
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if (yearly) {
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text = DateFormat.MMM(locale).format(
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DateTime(date.year, value.toInt() + 1),
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);
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} else {
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text = (value.toInt() + 1).toString();
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}
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return SideTitleWidget(
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axisSide: meta.axisSide,
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child: Text(text),
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);
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},
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),
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),
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), // axis descriptions
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),
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);
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}
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}
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/// Renders expenses/income as a [BarChart]
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class ExpensesBarChart extends StatelessWidget {
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/// Renders expenses/income as a [BarChart]
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const ExpensesBarChart({
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required this.yearly,
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required this.date,
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required this.locale,
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required this.expenseData,
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required this.incomeData,
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required this.currency,
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super.key,
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});
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/// If the graph will be shown yearly
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final bool yearly;
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/// Selected date
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///
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/// Used to get either month or year
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final DateTime date;
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/// Current locale
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///
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/// Used mainly for formatting
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final String locale;
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/// The expense data used for the graph
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final List<double> expenseData;
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/// Wallet currency
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///
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/// Used to show currency symbol
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final Currency currency;
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/// Expense data, but sorted
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List<double> get expenseDataSorted =>
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List<double>.from(expenseData)..sort((a, b) => a.compareTo(b));
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/// Income data used for the graph
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final List<double> incomeData;
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/// Income data, but sorted
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List<double> get incomeDataSorted =>
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List<double>.from(incomeData)..sort((a, b) => a.compareTo(b));
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/// Calculates maxY for the graph
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double get maxY {
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if (incomeData.isEmpty) return expenseDataSorted.last;
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if (expenseData.isEmpty) return incomeDataSorted.last;
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if (expenseDataSorted.last > incomeDataSorted.last) {
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return expenseDataSorted.last;
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} else {
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return incomeDataSorted.last;
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}
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}
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@override
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Widget build(BuildContext context) => BarChart(
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BarChartData(
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barTouchData: BarTouchData(
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enabled: true,
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touchTooltipData: BarTouchTooltipData(
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getTooltipItem: (group, groupIndex, rod, rodIndex) =>
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yearly // create custom tooltips for graph bars
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? BarTooltipItem(
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(rodIndex == 1 || incomeData.isEmpty) // expense
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? AppLocalizations.of(context).expensesForMonth(
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DateFormat.MMMM(locale).format(
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DateTime(date.year, groupIndex + 1),
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),
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(rod.toY),
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)
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: AppLocalizations.of(context).incomeForMonth(
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// income
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DateFormat.MMMM(locale).format(
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DateTime(date.year, groupIndex + 1),
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),
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(rod.toY),
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),
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TextStyle(color: rod.color),
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)
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: BarTooltipItem(
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(rodIndex == 1)
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? AppLocalizations.of(context).expensesForDay(
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(rod.toY),
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)
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: AppLocalizations.of(context).incomeForDay(
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NumberFormat.compactCurrency(
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locale: locale,
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symbol: currency.symbol,
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name: currency.name,
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).format(rod.toY),
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),
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TextStyle(color: rod.color),
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),
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),
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),
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titlesData: FlTitlesData(
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rightTitles: const AxisTitles(),
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topTitles: const AxisTitles(),
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bottomTitles: AxisTitles(
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sideTitles: SideTitles(
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showTitles: true,
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reservedSize: 30,
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getTitlesWidget: (value, meta) {
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String text;
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if (yearly) {
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text = DateFormat.MMM(locale).format(
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DateTime(date.year, value.toInt() + 1),
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);
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} else {
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text = (value.toInt() + 1).toString();
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}
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return SideTitleWidget(
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axisSide: meta.axisSide,
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child: Text(text),
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);
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},
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),
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),
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), // axis descriptions,
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minY: 0,
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maxY: maxY,
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barGroups: List<BarChartGroupData>.generate(
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yearly ? 12 : date.lastDay - 1,
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(index) => BarChartGroupData(
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x: index,
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barRods: [
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if (incomeData.isNotEmpty)
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BarChartRodData(
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toY: incomeData[index],
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color: Colors.green
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.harmonizeWith(Theme.of(context).colorScheme.primary),
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),
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if (expenseData.isNotEmpty)
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BarChartRodData(
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toY: expenseData[index],
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color: Colors.red
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.harmonizeWith(Theme.of(context).colorScheme.primary),
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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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/// [PieChart] used to display expenses/income visualized
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/// under their respective category
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class CategoriesPieChart extends StatefulWidget {
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/// [PieChart] used to display expenses/income visualized
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/// under their respective category
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const CategoriesPieChart({
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required this.entries,
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required this.categories,
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required this.symbol,
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required this.locale,
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super.key,
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});
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/// Entries to be used
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final List<WalletSingleEntry> entries;
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/// Categories to be displayed
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final List<WalletCategory> categories;
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/// Currency symbol displayed on the chart
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final String symbol;
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/// User locale
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final String locale;
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@override
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State<CategoriesPieChart> createState() => _CategoriesPieChartState();
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}
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class _CategoriesPieChartState extends State<CategoriesPieChart> {
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int touchedIndex = -1;
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@override
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Widget build(BuildContext context) => Column(
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children: [
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SizedBox(
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width: MediaQuery.of(context).size.width,
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child: Wrap(
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alignment: WrapAlignment.center,
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spacing: 4,
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children: List<Widget>.generate(
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widget.categories.length,
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(index) => Padding(
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padding: const EdgeInsets.all(8),
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child: Indicator(
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size: (touchedIndex != -1 &&
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touchedIndex ==
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widget.categories
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.where(
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(element) => widget.entries
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.where(
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(w) =>
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w.category.id ==
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element
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.id, // TODO: more elegant fix
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)
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.isNotEmpty,
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)
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.toList()
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.indexOf(widget.categories[index]))
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? 18
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: 16,
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color: widget.categories[index].color,
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text: widget.categories[index].name,
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textStyle: TextStyle(
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fontWeight: (touchedIndex != -1 &&
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touchedIndex ==
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widget.categories
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.where(
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(element) => widget.entries
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.where(
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(w) =>
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w.category.id == element.id,
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)
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.isNotEmpty,
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)
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.toList()
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.indexOf(widget.categories[index]))
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? FontWeight.bold
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: FontWeight.normal,
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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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const SizedBox(
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height: 5,
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),
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LimitedBox(
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maxHeight: MediaQuery.of(context).size.height * 0.23,
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maxWidth: MediaQuery.of(context).size.width * 0.9,
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child: PieChart(
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PieChartData(
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centerSpaceRadius: double.infinity,
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pieTouchData: PieTouchData(
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touchCallback: (event, response) {
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// Set touchedIndex so we can highlight
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// the corresponding indicator
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setState(() {
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if (!event.isInterestedForInteractions ||
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response == null ||
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response.touchedSection == null) {
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touchedIndex = -1;
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return;
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}
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touchedIndex =
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response.touchedSection!.touchedSectionIndex;
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});
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},
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),
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sections: List<PieChartSectionData>.generate(
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widget.categories.length,
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(index) => PieChartSectionData(
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title: NumberFormat.compactCurrency(
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symbol: widget.symbol,
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locale: widget.locale,
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).format(
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widget.entries
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.where(
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(element) =>
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element.category.id ==
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widget.categories[index].id,
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)
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.fold<double>(
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0,
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(previousValue, element) =>
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previousValue + element.data.amount,
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),
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),
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titleStyle: TextStyle(
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color:
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widget.categories[index].color.calculateTextColor(),
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fontWeight: FontWeight.bold,
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backgroundColor: widget.categories[index].color,
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),
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color: widget.categories[index].color,
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value: widget.entries
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.where(
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(element) =>
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element.category.id ==
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widget.categories[index].id,
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)
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.fold<double>(
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0,
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(previousValue, element) =>
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previousValue + element.data.amount,
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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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/// Used to indicate which part of a chart is for what
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class Indicator extends StatelessWidget {
|
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/// Used to indicate which part of a chart is for what
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const Indicator({
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required this.size,
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required this.color,
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required this.text,
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this.textStyle = const TextStyle(),
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super.key,
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});
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/// Size of the indicator circle
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final double size;
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/// Color of the indicator circle
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final Color color;
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/// Text shown next to the indicator circle
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final String text;
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/// Text style of the indicator
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final TextStyle textStyle;
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@override
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Widget build(BuildContext context) => Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Container(
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width: size,
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height: size,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: color,
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),
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),
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const SizedBox(
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width: 4,
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),
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Text(text, style: textStyle),
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],
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);
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}
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