prasule/lib/views/graph_view.dart

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Dart
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import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:intl/intl.dart';
import 'package:prasule/api/category.dart';
import 'package:prasule/api/wallet.dart';
import 'package:prasule/api/walletmanager.dart';
import 'package:prasule/main.dart';
import 'package:prasule/pw/platformbutton.dart';
import 'package:prasule/pw/platformroute.dart';
import 'package:prasule/util/drawer.dart';
import 'package:prasule/util/graphs.dart';
import 'package:prasule/views/settings/settings.dart';
import 'package:prasule/views/setup.dart';
import 'package:shared_preferences/shared_preferences.dart';
/// Shows data from a [Wallet] in graphs
class GraphView extends StatefulWidget {
/// Shows data from a [Wallet] in graphs
const GraphView({super.key});
@override
State<GraphView> createState() => _GraphViewState();
}
class _GraphViewState extends State<GraphView> {
var _selectedDate = DateTime.now();
Wallet? selectedWallet;
List<Wallet> wallets = [];
String? locale;
Set<String> yearlyBtnSet = {"monthly"};
Set<String> graphTypeSet = {"expense", "income"};
bool get yearly => yearlyBtnSet.contains("yearly");
@override
void didChangeDependencies() {
super.didChangeDependencies();
locale ??= Localizations.localeOf(context).languageCode;
}
List<double> generateChartData(EntryType type) {
final data = List<double>.filled(
yearly ? 12 : DateTime(_selectedDate.year, _selectedDate.month, 0).day,
0,
);
if (selectedWallet == null) return [];
for (var i = 0; i < data.length; i++) {
final entriesForRange = selectedWallet!.entries.where(
(element) =>
((!yearly)
? element.date.month == _selectedDate.month &&
element.date.year == _selectedDate.year &&
element.date.day == i + 1
: element.date.month == i + 1 &&
element.date.year == _selectedDate.year) &&
element.type == type,
);
var sum = 0.0;
for (final e in entriesForRange) {
sum += e.data.amount;
}
data[i] = sum;
}
return data;
}
Future<void> loadWallet() async {
wallets = await WalletManager.listWallets();
if (wallets.isEmpty && mounted) {
unawaited(
Navigator.of(context)
.pushReplacement(platformRoute((c) => const SetupView())),
);
return;
}
selectedWallet = wallets.first;
setState(() {});
}
int? chartType;
@override
void initState() {
super.initState();
loadWallet();
SharedPreferences.getInstance().then((s) {
chartType = s.getInt("monthlygraph") ?? 2;
setState(() {});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: DropdownButton<int>(
value:
(selectedWallet == null) ? -1 : wallets.indexOf(selectedWallet!),
items: [
...wallets.map(
(e) => DropdownMenuItem(
value: wallets.indexOf(
e,
),
child: Text(e.name),
),
),
DropdownMenuItem(
value: -1,
child: Text(AppLocalizations.of(context).newWallet),
),
],
onChanged: (v) async {
if (v == null || v == -1) {
await Navigator.of(context).push(
platformRoute(
(c) => const SetupView(
newWallet: true,
),
),
);
wallets = await WalletManager.listWallets();
logger.i(wallets.length);
selectedWallet = wallets.last;
setState(() {});
return;
}
selectedWallet = wallets[v];
setState(() {});
},
),
actions: [
PopupMenuButton(
itemBuilder: (context) => [
AppLocalizations.of(context).settings,
AppLocalizations.of(context).about,
].map((e) => PopupMenuItem(value: e, child: Text(e))).toList(),
onSelected: (value) {
if (value == AppLocalizations.of(context).settings) {
Navigator.of(context).push(
platformRoute(
(context) => const SettingsView(),
),
);
} else if (value == AppLocalizations.of(context).about) {
showAboutDialog(
context: context,
applicationLegalese: AppLocalizations.of(context).license,
applicationName: "Prašule",
);
}
},
),
],
),
drawer: makeDrawer(context, 2),
body: SingleChildScrollView(
child: Center(
child: (selectedWallet == null)
? const CircularProgressIndicator(
strokeWidth: 5,
)
: SizedBox(
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width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
SegmentedButton<String>(
segments: [
ButtonSegment<String>(
value: "expense",
label: Text(AppLocalizations.of(context).expenses),
),
ButtonSegment<String>(
value: "income",
label: Text(AppLocalizations.of(context).income),
),
],
selected: graphTypeSet,
multiSelectionEnabled: true,
onSelectionChanged: (selection) {
graphTypeSet = selection;
setState(() {});
},
),
const SizedBox(
height: 5,
),
SegmentedButton<String>(
segments: [
ButtonSegment<String>(
value: "yearly",
label: Text(AppLocalizations.of(context).yearly),
),
ButtonSegment<String>(
value: "monthly",
label: Text(AppLocalizations.of(context).monthly),
),
],
selected: yearlyBtnSet,
onSelectionChanged: (selection) async {
yearlyBtnSet = selection;
final s = await SharedPreferences.getInstance();
chartType = yearly
? (s.getInt("yearlygraph") ?? 1)
: (s.getInt("monthlygraph") ?? 2);
setState(() {});
},
),
const SizedBox(height: 5),
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8),
color:
Theme.of(context).colorScheme.secondaryContainer,
),
child: Padding(
padding: const EdgeInsets.all(8),
child: Column(
children: [
PlatformButton(
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style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(
Theme.of(context).colorScheme.primary,
),
foregroundColor: MaterialStateProperty.all(
Theme.of(context).colorScheme.onPrimary,
),
),
text: yearly
? DateFormat.y(locale).format(_selectedDate)
: DateFormat.yMMMM(locale)
.format(_selectedDate),
onPressed: () async {
final firstDate = (selectedWallet!.entries
..sort(
(a, b) => a.date.compareTo(b.date),
))
.first
.date;
final lastDate = (selectedWallet!.entries
..sort(
(a, b) => b.date.compareTo(a.date),
))
.first
.date;
final newDate = await showDatePicker(
context: context,
initialDate: DateTime(
_selectedDate.year,
_selectedDate.month,
),
firstDate: firstDate,
lastDate: lastDate,
initialEntryMode: yearly
? DatePickerEntryMode.input
: DatePickerEntryMode.calendar,
initialDatePickerMode: yearly
? DatePickerMode.year
: DatePickerMode.day,
);
if (newDate == null) return;
_selectedDate = newDate;
setState(() {});
},
),
const SizedBox(
height: 5,
),
SizedBox(
width: MediaQuery.of(context).size.width * 0.9,
height: 300,
child: (chartType == null)
? const CircularProgressIndicator()
: (chartType == 1)
? ExpensesBarChart(
currency: selectedWallet!.currency,
date: _selectedDate,
locale: locale ?? "en",
yearly: yearly,
expenseData: (graphTypeSet
.contains("expense"))
? generateChartData(
EntryType.expense,
)
: [],
incomeData: (graphTypeSet
.contains("income"))
? generateChartData(
EntryType.income,
)
: [],
)
: ExpensesLineChart(
currency: selectedWallet!.currency,
date: _selectedDate,
locale: locale ?? "en",
yearly: yearly,
expenseData: (graphTypeSet
.contains("expense"))
? generateChartData(
EntryType.expense,
)
: [],
incomeData: (graphTypeSet
.contains("income"))
? generateChartData(
EntryType.income,
)
: [],
),
),
],
),
),
),
],
),
),
),
),
);
}
}