add structure

2020-05-29 07:45:27 +06:30
parent 4c851d9971
commit bad27ba5c4
272 changed files with 36065 additions and 174 deletions
--- a/lib/charts/lines.dart
+++ b/lib/charts/lines.dart
@@ -0,0 +1,107 @@
+import 'package:charts_flutter/flutter.dart' as charts;
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+
+import '../model/product_model.dart';
+
+typedef void ProductClick(DateTime date, Map<String, int> measures);
+
+class ProductsChart extends StatelessWidget {
+  static final numberFormatter = new NumberFormat("#,###");
+  final ChartData chartData;
+  final ProductClick productClick;
+  const ProductsChart(this.chartData, {Key key, this.productClick})
+      : super(key: key);
+  factory ProductsChart.fromModel(ProductModel productModel,
+      {ProductClick productClick}) {
+    return new ProductsChart(_createData(productModel),
+        productClick: productClick);
+  }
+
+  static ChartData _createData(ProductModel productModel) {
+    List<charts.Series<TimeSeriesSales, DateTime>> list = [];
+    var min = 9999, max = 0;
+    productModel.products.forEach((p) {
+      List<TimeSeriesSales> data = [];
+      if (p.priceHistory != null) {
+        var dateKeys = {};
+        p.priceHistory.entries.forEach((e) {
+          dateKeys[DateTime.parse(e.key)] = e.value;
+        });
+
+        var sortedKeys = dateKeys.keys.toList()..sort((a, b) => b.compareTo(a));
+        sortedKeys.forEach((k) {
+          var v = dateKeys[k];
+          data.add(new TimeSeriesSales(k, v));
+          if (v < min) min = v;
+          if (v > max) max = v;
+        });
+      }
+
+      list.add(new charts.Series<TimeSeriesSales, DateTime>(
+        id: p.name,
+        colorFn: (_, __) => charts.ColorUtil.fromDartColor(Color(p.color)),
+        domainFn: (TimeSeriesSales sales, _) => sales.time,
+        measureFn: (TimeSeriesSales sales, _) => sales.sales,
+        data: data,
+        labelAccessorFn: (TimeSeriesSales series, _) =>
+            '${numberFormatter.format(series.sales)}',
+        measureFormatterFn: (TimeSeriesSales series, _) => (n) => "s",
+      ));
+    });
+    var chartData = ChartData(list, min, max);
+    return chartData;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return charts.TimeSeriesChart(
+      chartData.seriesList,
+      animate: true,
+      defaultRenderer: new charts.LineRendererConfig(
+        includePoints: true,
+      ),
+      primaryMeasureAxis: new charts.NumericAxisSpec(
+          tickProviderSpec: new charts.BasicNumericTickProviderSpec(
+              zeroBound: false, desiredTickCount: 10),
+          renderSpec: new charts.GridlineRendererSpec(
+              lineStyle: charts.LineStyleSpec(
+            dashPattern: [4, 4],
+          ))),
+      selectionModels: [
+        new charts.SelectionModelConfig(
+          type: charts.SelectionModelType.info,
+          updatedListener: _onSelectionChanged,
+        )
+      ],
+    );
+  }
+
+  _onSelectionChanged(charts.SelectionModel model) {
+    final selectedDatum = model.selectedDatum;
+    if (selectedDatum.isNotEmpty) {
+      var _time = selectedDatum.first.datum.time;
+      Map<String, int> _measures = <String, int>{};
+
+      selectedDatum.forEach((charts.SeriesDatum datumPair) {
+        _measures[datumPair.series.displayName] = datumPair.datum.sales;
+      });
+      if (productClick != null) {
+        productClick(_time, _measures);
+      }
+    }
+  }
+}
+
+class TimeSeriesSales {
+  final DateTime time;
+  final int sales;
+
+  TimeSeriesSales(this.time, this.sales);
+}
+
+class ChartData {
+  final List<charts.Series> seriesList;
+  final num min, max;
+  ChartData(this.seriesList, this.min, this.max);
+}