add carton editor to update

lib/pages/carton/mix_carton/mix_carton_editor.dart

@@ -1,5 +1,6 @@
 // ignore_for_file: deprecated_member_use
 
+import 'package:fcs/pages/fcs_shipment/model/fcs_shipment_model.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
@@ -50,10 +51,26 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
 
   @override
   void initState() {
-    context.read<CartonSelectionModel>().clearSelection();
+    _init();
     super.initState();
   }
 
+  _init() async {
+    var s = await context
+        .read<FcsShipmentModel>()
+        .getFcsShipment(widget.carton.fcsShipmentID ?? "");
+    _shipment = s;
+    _cartonSizeType = customCarton;
+    _length = widget.carton.length;
+    _width = widget.carton.width;
+    _height = widget.carton.height;
+
+    context.read<CartonSelectionModel>().clearSelection();
+    if (mounted) {
+      setState(() {});
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return WillPopScope(
@@ -90,7 +107,7 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
                   },
                 ),
                 backgroundColor: Colors.white,
-                title: LocalText(context, 'boxes.new',
+                title: LocalText(context, 'box.update_title',
                     color: primaryColor, fontSize: 20),
               ),
               body: Column(
@@ -163,6 +180,7 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
     } else {
       return Expanded(
         child: MixCartonSubmit(
+          isNew: false,
           cartonSizeType: _cartonSizeType,
           standardSize: _standardSize,
           length: _length,
@@ -171,7 +189,7 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
           shipment: _shipment!,
           cartons: _cartons,
           onCreate: () {
-            _create();
+            _update();
           },
           onPrevious: () {
             setState(() {
@@ -183,7 +201,7 @@ class _MixCartonEditorState extends State<MixCartonEditor> {
     }
   }
 
-  _create() async {
+  _update() async {
     setState(() {
       _isLoading = true;
     });