Line data    Source code

       1              : // Copyright 2023 The terCAD team. All rights reserved.
       2              : // Use of this source code is governed by a CC BY-NC-ND 4.0 license that can be found in the LICENSE file.
       3              : 
       4              : import 'package:app_finance/_classes/herald/app_start_of_month.dart';
       5              : import 'package:app_finance/_ext/build_context_ext.dart';
       6              : import 'package:app_finance/_ext/date_time_ext.dart';
       7              : import 'package:app_finance/charts/interface/chart_data.dart';
       8              : import 'package:app_finance/charts/painter/forecast_chart_painter.dart';
       9              : import 'package:app_finance/charts/painter/foreground_chart_painter.dart';
      10              : import 'package:app_finance/design/generic/empty_widget.dart';
      11              : import 'package:material_ui/material_ui.dart';
      12              : 
      13              : class ForecastChart extends StatelessWidget {
      14              :   final double width;
      15              :   final double height;
      16              :   final double indent;
      17              :   final String tooltip;
      18              :   final List<ChartData> data;
      19              :   final double yMax;
      20              : 
      21            0 :   const ForecastChart({
      22              :     super.key,
      23              :     required this.data,
      24              :     required this.yMax,
      25              :     required this.width,
      26              :     required this.height,
      27              :     this.indent = 0.0,
      28              :     this.tooltip = '',
      29              :   });
      30              : 
      31            0 :   @override
      32              :   Widget build(BuildContext context) {
      33            0 :     if (data.isEmpty || data.first.data.isEmpty) {
      34              :       return const EmptyWidget();
      35              :     }
      36            0 :     final now = DateTime.now();
      37            0 :     final size = Size(width, height);
      38            0 :     final bgColor = context.colorScheme.onSurface;
      39            0 :     final startingDay = AppStartOfMonth.get();
      40            0 :     final xMin = now.getStartingDay(startingDay).millisecondsSinceEpoch.toDouble();
      41              :     final xMax =
      42            0 :         DateTime(now.year, now.month + 1, now.day).getStartingDay(startingDay).millisecondsSinceEpoch.toDouble();
      43            0 :     final bg = ForegroundChartPainter(
      44              :       size: size,
      45              :       color: bgColor,
      46              :       lineColor: bgColor,
      47            0 :       background: bgColor.withValues(alpha: 0.1),
      48              :       yMin: 0.0,
      49              :       yMax: 140,
      50            0 :       yArea: [80, 120],
      51              :       xType: DateTime,
      52              :       yType: Percentage,
      53              :       xMin: xMin,
      54              :       xMax: xMax,
      55              :     );
      56            0 :     return SizedBox(
      57            0 :       height: size.height,
      58            0 :       width: size.width,
      59            0 :       child: CustomPaint(
      60              :         size: size,
      61            0 :         painter: ForecastChartPainter(
      62            0 :           indent: bg.shift,
      63              :           size: size,
      64            0 :           data: data,
      65            0 :           yMax: yMax * bg.yMax / 100,
      66              :           xMin: xMin,
      67              :           xMax: xMax,
      68              :         ),
      69              :         foregroundPainter: bg,
      70              :         willChange: false,
      71            0 :         child: Padding(
      72            0 :           padding: EdgeInsets.only(top: indent / 4),
      73            0 :           child: Text(tooltip),
      74              :         ),
      75              :       ),
      76              :     );
      77              :   }
      78              : }