add structure

lib/charts/bar_chart.dart

@@ -0,0 +1,119 @@
+import 'package:charts_flutter/flutter.dart' as charts;
+import 'package:charts_flutter/flutter.dart';
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+import 'package:provider/provider.dart';
+import 'package:fcs/charts/qtyby_customer_table.dart';
+import 'package:fcs/model/chart_model.dart';
+import 'package:fcs/model/product_model.dart';
+import 'package:fcs/theme/theme.dart';
+import 'package:fcs/vo/po.dart';
+import 'package:fcs/widget/local_text.dart';
+
+class BarChart extends StatefulWidget {
+  @override
+  _BarChartState createState() => _BarChartState();
+}
+
+class _BarChartState extends State<BarChart> {
+  static final numberFormatter = new NumberFormat("#,###");
+  List<POChartData> chartSummary = new List();
+  List<charts.Series<POChartData, String>> series;
+
+  @override
+  void initState() {
+    super.initState();
+    var chartModel = Provider.of<ChartModel>(context, listen: false);
+    this.chartSummary = chartModel.chartSummary;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    var productModel = Provider.of<ProductModel>(context);
+    if (this.chartSummary.isNotEmpty) {
+      this.chartSummary.forEach((s) {
+        productModel.products.forEach((p) {
+          if (p.id == s.productID) {
+            s.displayOrder = p.displayOrder;
+          } else {
+            return;
+          }
+        });
+      });
+
+      this.chartSummary
+          .sort((s1, s2) => s1.displayOrder.compareTo(s2.displayOrder));
+    }
+    List<charts.Series<POChartData, String>> series = [
+      charts.Series(
+          id: "Subscribers",
+          data: this.chartSummary,
+          domainFn: (POChartData series, _) => series.productName,
+          measureFn: (POChartData series, _) => series.balanceQty,
+          colorFn: (POChartData series, _) =>
+              charts.ColorUtil.fromDartColor(series.getColor),
+          labelAccessorFn: (POChartData series, _) =>
+              '${numberFormatter.format(series.balanceQty)}'),
+    ];
+
+    return Container(
+      height: 200,
+      child: Column(
+        children: <Widget>[
+          Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: <Widget>[
+              LocalText(context, 'product.balance_qty',
+                  color: primaryColor, fontSize: 16),
+              IconButton(
+                icon: Icon(
+                  Icons.refresh,
+                  color: primaryColor,
+                ),
+                onPressed: () {
+                  _load();
+                },
+              )
+            ],
+          ),
+          Expanded(
+            child: charts.BarChart(
+              series,
+              animate: true,
+              vertical: false,
+              defaultRenderer: new charts.BarRendererConfig(
+                barRendererDecorator: new charts.BarLabelDecorator<String>(
+                  labelPosition: charts.BarLabelPosition.auto,
+                ),
+              ),
+              selectionModels: [
+                SelectionModelConfig(changedListener: (SelectionModel model) {
+                  final selectedDatum = model.selectedDatum;
+                  if (selectedDatum.isNotEmpty) {
+                    selectedDatum.forEach((charts.SeriesDatum datumPair) {
+                      Navigator.push(
+                        context,
+                        MaterialPageRoute(
+                            builder: (context) => QtyByCustomerTable(
+                                  poChartData: datumPair.datum,
+                                )),
+                      );
+                    });
+                  }
+                })
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Future<void> _load() async {
+    var chartModel = Provider.of<ChartModel>(context);
+    var _s = await chartModel.loadSummary();
+    setState(() {
+      this.chartSummary = _s ?? [];
+    });
+  }
+}