add signin function

lib/charts/bar_chart.dart

@@ -6,7 +6,7 @@ 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/fcs/common/theme.dart';
 import 'package:fcs/vo/po.dart';
 import 'package:fcs/widget/local_text.dart';
 
@@ -41,7 +41,8 @@ class _BarChartState extends State<BarChart> {
         });
       });
 
-      this.chartSummary
+      this
+          .chartSummary
           .sort((s1, s2) => s1.displayOrder.compareTo(s2.displayOrder));
     }
     List<charts.Series<POChartData, String>> series = [