check image for null safety

lib/pages/widgets/display_image_source.dart

@@ -8,17 +8,26 @@ class DisplayImageSource {
   File? file;
   DisplayImageSource({this.url, this.file});
 
-  ImageProvider? get imageProvider =>
+  ImageProvider get imageProvider {
-      file == null ? CachedNetworkImageProvider(url!) : FileImage(file!);
+    if (file == null) {
+      return CachedNetworkImageProvider(url!);
+    } else {
+      return FileImage(file!);
+    }
+  }
 
   @override
   bool operator ==(other) {
-    if (identical(this, other)) {
+    if (identical(this, other) && other is DisplayImageSource) {
       return true;
     }
-    return (other.file == this.file &&
+
+    return (other is DisplayImageSource &&
+            other.file == this.file &&
             (other.file != null || this.file != null)) ||
-        (other.url == this.url && (other.url != null || this.url != null));
+        (other is DisplayImageSource &&
+            other.url == this.url &&
+            (other.url != null || this.url != null));
   }
 
   @override

lib/pages/widgets/image_file_picker.dart

@@ -7,7 +7,7 @@ import 'local_text.dart';
 
 typedef OnFile = void Function(File);
 
-modelBottomSheet(BuildContext context, {final OnFile onFile}) {
+modelBottomSheet(BuildContext context, {final OnFile? onFile}) {
   showModalBottomSheet(
       elevation: 10,
       backgroundColor: Colors.white,
@@ -84,7 +84,7 @@ class _ImageFileState extends State<ImageFile> {
   }
 
   pickImage(ImageSource source) async {
-    var tempImage = await ImagePicker.pickImage(source: source);
+    var tempImage = await ImagePicker().pickImage(source: source);
     return tempImage;
   }
 }

lib/pages/widgets/img_picker.dart

@@ -1,5 +1,6 @@
 import 'dart:io';
 
+import 'package:fcs/helpers/theme.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
@@ -7,19 +8,19 @@ import 'package:image_picker/image_picker.dart';
 
 import 'show_img.dart';
 
-typedef OnFile = void Function(File);
+typedef OnFile = void Function(File?);
 
 class LocalImagePicker extends StatefulWidget {
-  final Color color;
+  final Color? color;
   final String title;
-  final OnFile onFile;
+  final OnFile? onFile;
   final bool enabled;
-  final String initialImgUrl;
+  final String? initialImgUrl;
   final ImageSource imageSource;
 
   const LocalImagePicker(
-      {Key key,
+      {Key? key,
-      this.title,
+      required this.title,
       this.onFile,
       this.enabled = true,
       this.initialImgUrl,
@@ -31,8 +32,8 @@ class LocalImagePicker extends StatefulWidget {
 }
 
 class _LocalImagePickerState extends State<LocalImagePicker> {
-  String url;
+  String? url;
-  File file;
+  File? file;
 
   @override
   void initState() {
@@ -56,16 +57,16 @@ class _LocalImagePickerState extends State<LocalImagePicker> {
                 await _dialog(
                     context, () => camera = true, () => gallery = true);
                 if (camera || gallery) {
-                  var selectedFile = await ImagePicker.pickImage(
+                  var selectedFile = await ImagePicker().pickImage(
                       source: camera ? ImageSource.camera : ImageSource.gallery,
                       imageQuality: 80,
                       maxWidth: 1000);
                   if (selectedFile != null) {
                     setState(() {
-                      this.file = selectedFile;
+                      this.file = File(selectedFile.path);
                     });
                     if (widget.onFile != null) {
-                      widget.onFile(selectedFile);
+                      widget.onFile!(File(selectedFile.path));
                     }
                   }
                 }
@@ -93,7 +94,7 @@ class _LocalImagePickerState extends State<LocalImagePicker> {
                             this.file = null;
                             this.url = null;
                             if (widget.onFile != null) {
-                              widget.onFile(null);
+                              widget.onFile!(null);
                             }
                           });
                         },

lib/pages/widgets/length_picker.dart

@@ -144,7 +144,8 @@ class _LengthPickerDialogState extends State<LengthPickerDialog> {
                     borderSide: BorderSide(color: primaryColor, width: 1.0),
                   ),
                   enabledBorder: OutlineInputBorder(
-                    borderSide: BorderSide(color: Colors.grey.shade400, width: 1.0),
+                    borderSide:
+                        BorderSide(color: Colors.grey.shade400, width: 1.0),
                   ),
                 ),
               ),
@@ -196,7 +197,8 @@ class _LengthPickerDialogState extends State<LengthPickerDialog> {
                     borderSide: BorderSide(color: primaryColor, width: 1.0),
                   ),
                   enabledBorder: OutlineInputBorder(
-                    borderSide: BorderSide(color: Colors.grey.shade400, width: 1.0),
+                    borderSide:
+                        BorderSide(color: Colors.grey.shade400, width: 1.0),
                   ),
                 ),
               ),
@@ -273,7 +275,7 @@ class _LengthPickerDialogState extends State<LengthPickerDialog> {
                     min: 0,
                     max: MAX_FEET,
                     divisions: 100,
-                    label: (_valueFeet ?? 0).round().toString(),
+                    label: _valueFeet.round().toString(),
                     onChanged: (double v) {
                       _updateFeet(v);
                     },
@@ -301,7 +303,7 @@ class _LengthPickerDialogState extends State<LengthPickerDialog> {
               min: 0,
               max: widget.displayFeet! ? 11 : MAX_INC,
               divisions: 100,
-              label: (_valueInc ?? 0).round().toString(),
+              label: _valueInc.round().toString(),
               onChanged: (double v) {
                 _updateInc(v);
               },

lib/pages/widgets/multi_img_controller.dart

@@ -5,12 +5,12 @@ import 'display_image_source.dart';
 
 class MultiImgController {
   List<String> imageUrls = [];
-  List<File> imageFiles = [];
+  List<File?> imageFiles = [];
   List<DisplayImageSource> addedFiles = [];
   List<DisplayImageSource> removedFiles = [];
 
   List<DisplayImageSource> fileContainers = [];
-  CallBack callback;
+  CallBack? callback;
   MultiImgController() {
     fileContainers = [];
   }
@@ -26,7 +26,7 @@ class MultiImgController {
       fileContainers.add(DisplayImageSource(url: e));
     });
     if (callback != null) {
-      callback();
+      callback!();
     }
   }
 
@@ -42,7 +42,7 @@ class MultiImgController {
       fileContainers.add(DisplayImageSource(file: e));
     });
     if (callback != null) {
-      callback();
+      callback!();
     }
   }
 
@@ -54,7 +54,7 @@ class MultiImgController {
     // if (fileContainers.contains(fileContainer)) return;
     addedFiles.add(fileContainer);
     if (callback != null) {
-      callback();
+      callback!();
     }
   }
 
@@ -74,11 +74,11 @@ class MultiImgController {
     }
 
     if (callback != null) {
-      callback();
+      callback!();
     }
   }
 
-  List<File> get getUpdatedFile {
+  List<File?> get getUpdatedFile {
     List<File?> _addfiles = getAddedFile;
     this.imageFiles.addAll(_addfiles);
     return this.imageFiles;