fix length input

lib/pages/carton/carton_editor.dart

@@ -426,17 +426,17 @@ class _CartonEditorState extends State<CartonEditor> {
     final lengthBox = LengthPicker(
       controller: _lengthController,
       lableKey: "box.length",
-      isReadOnly: true,
+      isReadOnly: false,
     );
     final widthBox = LengthPicker(
       controller: _widthController,
       lableKey: "box.width",
-      isReadOnly: true,
+      isReadOnly: false,
     );
     final heightBox = LengthPicker(
       controller: _heightController,
       lableKey: "box.height",
-      isReadOnly: true,
+      isReadOnly: false,
     );
     final dimBox = Row(
       mainAxisAlignment: MainAxisAlignment.start,

lib/pages/carton/carton_info.dart

@@ -408,10 +408,10 @@ class _CartonInfoState extends State<CartonInfo> {
   }
 
   _gotoEditor() async {
-    widget.box.mixCartons = _box.mixCartons;
+    _box.mixCartons = _box.mixCartons;
     bool updated = await Navigator.push<bool>(
       context,
-      CupertinoPageRoute(builder: (context) => CartonEditor(box: widget.box)),
+      CupertinoPageRoute(builder: (context) => CartonEditor(box: _box)),
     );
     if (updated ?? false) {
       var cartonModel = Provider.of<CartonModel>(context, listen: false);

lib/pages/carton/package_carton_editor.dart

@@ -97,17 +97,17 @@ class _PackageCartonEditorState extends State<PackageCartonEditor> {
     final lengthBox = LengthPicker(
       controller: _lengthCtl,
       lableKey: "box.length",
-      isReadOnly: true,
+      isReadOnly: false,
     );
     final widthBox = LengthPicker(
       controller: _widthCtl,
       lableKey: "box.width",
-      isReadOnly: true,
+      isReadOnly: false,
     );
     final heightBox = LengthPicker(
       controller: _heightCtl,
       lableKey: "box.height",
-      isReadOnly: true,
+      isReadOnly: false,
     );
     final dimBox = Row(
       mainAxisAlignment: MainAxisAlignment.start,