feat: ImagePickerConfig for setting image size and quality

lib/flutter_image_picker.dart

@@ -1,4 +1,5 @@
 library flutter_image_picker;
 
 export 'src/models/image_picker_theme.dart';
+export 'src/models/image_picker_config.dart';
 export 'src/ui/image_picker.dart';

lib/src/models/image_picker_config.dart

@@ -0,0 +1,20 @@
+class ImagePickerConfig {
+  /// The [ImagePickerConfig] is used to configure the [ImagePicker].
+  const ImagePickerConfig({
+    this.maxWidth,
+    this.maxHeight,
+    this.imageQuality,
+  });
+
+  /// If specified, the image will be at most `maxWidth` wide and
+  /// `maxHeight` tall. Otherwise the image will be returned at it's
+  /// original width and height.
+  /// The `imageQuality` argument modifies the quality of the image, ranging from 0-100
+  /// where 100 is the original/max quality. If `imageQuality` is null, the image with
+  /// the original quality will be returned. Compression is only supported for certain
+  /// image types such as JPEG and on Android PNG and WebP, too. If compression is not supported for the image that is picked,
+  /// a warning message will be logged.
+  final double? maxWidth;
+  final double? maxHeight;
+  final int? imageQuality;
+}

lib/src/services/image_picker_service.dart

@@ -1,5 +1,6 @@
 import 'dart:typed_data';
 
+import 'package:flutter_image_picker/src/models/image_picker_config.dart';
 import 'package:image_picker/image_picker.dart';
 
 /// The Image Picker Service class is the functionality of the Image Picker package which uses the Image Picker package to choose an image.
@@ -12,10 +13,15 @@ class ImagePickerService {
 
   /// [pickImage] is the function that picks the image and returns it as a [Uint8List].
   /// The function requires [source], an [ImageSource] that's the method of how the image needs to be picked, for example gallery or camera.
-  Future<Uint8List?> pickImage(ImageSource source) async {
+  Future<Uint8List?> pickImage(
-    var image =
+    ImageSource source, {
-        await (await (imagePicker ?? ImagePicker()).pickImage(source: source))
+    ImagePickerConfig? config,
+  }) async =>
+      await (await (imagePicker ?? ImagePicker()).pickImage(
+        source: source,
+        maxWidth: config?.maxWidth,
+        maxHeight: config?.maxHeight,
+        imageQuality: config?.imageQuality,
+      ))
           ?.readAsBytes();
-    return image;
-  }
 }

lib/src/ui/image_picker.dart

@@ -1,24 +1,28 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_image_picker/flutter_image_picker.dart';
 import 'package:flutter_image_picker/src/services/image_picker_service.dart';
 import 'package:image_picker/image_picker.dart';
 
-import '../models/image_picker_theme.dart';
+/// The Image Picker class generates the Image Picker Widget which can be displayed in your application. If you call the class you can give it 4 optional variables:
-
-/// The Image Picker class generates the Image Picker Widget which can be displayed in your application. If you call the class you can give it 3 optional variables:
 /// The first one is the [ImagePickerTheme] which can be used to change the UI of the widget.
-/// The second one is your own implementation of the ImagePickerService. Which can be used in testing for example.
+/// The second one is the [ImagePickerConfig] which can be used to configure the behaviour of the image picker.
-/// The third one is a custom Button widget.
+/// The third one is your own implementation of the ImagePickerService. Which can be used in testing for example.
+/// The fourth one is a custom Button widget.
 class ImagePicker extends StatelessWidget {
-  const ImagePicker(
+  const ImagePicker({
-      {Key? key,
+    Key? key,
     this.imagePickerTheme = const ImagePickerTheme(),
+    this.imagePickerConfig = const ImagePickerConfig(),
     this.imagePickerService,
-      this.customButton})
+    this.customButton,
-      : super(key: key);
+  }) : super(key: key);
 
   /// ImagePickerTheme can be used to change the UI of the Image Picker Widget to change the text/icons to your liking.
   final ImagePickerTheme imagePickerTheme;
 
+  /// ImagePickerConfig can be used to define the size and quality for the uploaded image.
+  final ImagePickerConfig imagePickerConfig;
+
   /// The Image Picker Dialog can have a custom button if you want to.
   final StatelessWidget? customButton;
 
@@ -26,8 +30,7 @@ class ImagePicker extends StatelessWidget {
   final ImagePickerService? imagePickerService;
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context) => SingleChildScrollView(
-    return SingleChildScrollView(
         child: Column(
           children: <Widget>[
             ListTile(
@@ -42,9 +45,7 @@ class ImagePicker extends StatelessWidget {
                 ),
               ),
             ),
-        const SizedBox(
+            const SizedBox(height: 20),
-          height: 20,
-        ),
             Row(
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
@@ -54,7 +55,8 @@ class ImagePicker extends StatelessWidget {
                   imagePickerTheme,
                   Icons.image,
                   ImageSource.gallery,
-                imagePickerTheme.selectImageText),
+                  imagePickerTheme.selectImageText,
+                ),
                 SizedBox(
                   width: imagePickerTheme.spaceBetweenIcons,
                 ),
@@ -64,12 +66,11 @@ class ImagePicker extends StatelessWidget {
                   imagePickerTheme,
                   Icons.camera_alt_rounded,
                   ImageSource.camera,
-                imagePickerTheme.makePhotoText),
+                  imagePickerTheme.makePhotoText,
+                ),
               ],
             ),
-        const SizedBox(
+            const SizedBox(height: 10),
-          height: 10,
-        ),
             Row(
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
@@ -80,23 +81,25 @@ class ImagePicker extends StatelessWidget {
                       ElevatedButton(
                         style: ElevatedButton.styleFrom(
                           backgroundColor:
-                              imagePickerTheme.closeButtonBackgroundColor),
+                              imagePickerTheme.closeButtonBackgroundColor,
+                        ),
                         onPressed: () => Navigator.of(context).pop(),
-                      child: Text(imagePickerTheme.closeButtonText,
+                        child: Text(
+                          imagePickerTheme.closeButtonText,
                           style: TextStyle(
                             fontFamily: imagePickerTheme.font,
                             fontSize: imagePickerTheme.closeButtonTextSize,
                             color: imagePickerTheme.closeButtonTextColor,
-                          ))),
+                          ),
+                        ),
+                      ),
                 )
               ],
             ),
-        const SizedBox(
+            const SizedBox(height: 30),
-          height: (30),
-        ),
           ],
-    ));
+        ),
-  }
+      );
 
   /// The [_generateIconButtonWithText] function returns a column that includes an [IconButton] and [Text].
   /// The function requires the following parameters to be able to generate an icon with text:
@@ -111,8 +114,8 @@ class ImagePicker extends StatelessWidget {
           ImagePickerTheme imagePickerTheme,
           IconData icon,
           ImageSource imageSource,
-      String bottomText) {
+          String bottomText) =>
-    return Column(
+      Column(
         mainAxisSize: MainAxisSize.min,
         children: <Widget>[
           InkWell(
@@ -120,7 +123,7 @@ class ImagePicker extends StatelessWidget {
             onTap: () async {
               final navigator = Navigator.of(context);
               var image = await (imagePickerService ?? ImagePickerService())
-                .pickImage(imageSource);
+                  .pickImage(imageSource, config: imagePickerConfig);
               navigator.pop(image);
             },
             child: customIcon ??
@@ -135,12 +138,10 @@ class ImagePicker extends StatelessWidget {
             style: TextStyle(
               fontFamily: imagePickerTheme.font,
               fontSize: imagePickerTheme.iconTextSize,
-              color: imagePickerTheme.textColor),
+              color: imagePickerTheme.textColor,
             ),
-        const SizedBox(
-          height: 20,
           ),
+          const SizedBox(height: 20),
         ],
       );
 }
-}