update carton from packages

lib/pages/carton/mix_carton_editor.dart

@@ -1,12 +1,15 @@
 import 'package:fcs/domain/entities/carton.dart';
 import 'package:fcs/helpers/theme.dart';
+import 'package:fcs/pages/carton/model/carton_model.dart';
 import 'package:fcs/pages/carton_search/carton_search.dart';
+import 'package:fcs/pages/main/util.dart';
 import 'package:fcs/pages/widgets/local_button.dart';
 import 'package:fcs/pages/widgets/local_text.dart';
 import 'package:fcs/pages/widgets/local_title.dart';
 import 'package:fcs/pages/widgets/progress.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 import 'carton_row.dart';
 
 class MixCartonEditor extends StatefulWidget {
@@ -26,14 +29,7 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
   @override
   void initState() {
     super.initState();
-
-    if (widget.box != null) {
-      _box = widget.box;
-      _isNew = false;
-    } else {
-      _isNew = true;
-      _box = Carton(cargoTypes: []);
-    }
+    _box = widget.box;
   }
 
   @override
@@ -124,5 +120,26 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
     });
   }
 
-  _creatCarton() {}
+  _creatCarton() {
+    if ((this._cartons?.length ?? 0) == 0) {
+      showMsgDialog(context, "Error", "Expect at least one carton");
+      return;
+    }
+    Carton carton = Carton();
+    carton.id = _box.id;
+    carton.cartonType = _box.cartonType;
+    setState(() {
+      _isLoading = true;
+    });
+    try {
+      CartonModel cartonModel =
+          Provider.of<CartonModel>(context, listen: false);
+    } catch (e) {
+      showMsgDialog(context, "Error", e.toString());
+    } finally {
+      setState(() {
+        _isLoading = false;
+      });
+    }
+  }
 }