lots of refactors

example/lib/main.dart

@@ -38,7 +38,6 @@ class ImagePickerExampleHomePage extends StatefulWidget {
 class _ImagePickerExampleHomePageState
     extends State<ImagePickerExampleHomePage> {
   Uint8List? image;
-  final ImagePicker imagePicker = ImagePicker();
   final double whiteSpace = 20;
   final double imageWidth = 300;
   final String placeholder = 'assets/images/placeholder.png';
@@ -89,18 +88,15 @@ class _ImagePickerExampleHomePageState
   }
 
   /// The [pickImage] function is used to show the usage of the Image Picker Package.
-  /// The most important part is the [showImagePickerDialog] function call.
-  /// The only required parameter is the [context] of the application.
-  /// There are multiple optional parameters that can be included to customize the Image Picker Dialog.
-  /// You can add an optional parameter by for example adding [title: "Image Picker"] to the function call after the context parameter.
-  /// Check the README for all possible optional parameters you can add.
+  /// The most important part is the [ImagePicker] call.
+  /// You can add a custom [ImagePickerTheme] to it if you want to change some of the UI.
+  /// You can do that by adding [imagePickerTheme: const ImagePickerTheme()] in the [ImagePicker] in the builder.
+  /// Check the README for all possible parameters you can add in the [ImagePickerTheme].
   /// This function saves the image in a variable and if it's different than the current image it will get displayed in the application.
   /// When the same image is chosen there will be a snackbar popping up to let you know it's already being displayed.
   void pickImage() async {
     Uint8List? imageInBytes = await showModalBottomSheet<Uint8List?>(
-        context: context,
-        builder: (BuildContext context) =>
-            imagePicker.showImagePickerDialog(context));
+        context: context, builder: (BuildContext context) => ImagePicker());
     if (imageInBytes != null) {
       if (!listEquals(image, imageInBytes)) {
         setState(() {

lib/image_picker.dart

@@ -1,49 +1,4 @@
-import 'dart:typed_data';
-import 'package:flutter/cupertino.dart';
+library flutter_image_picker;
 
-import 'src/models/image_picker_settings.dart';
-import 'src/ui/image_picker_ui.dart';
-
-class ImagePicker {
-  /// [showImagePickerDialog] is the function that gets called by the user of the package.
-  /// With this function the Image Picker Dialog gets shown and can be used to pick an image.
-  /// The image gets returned as a [Uint8List] and can be used in the application.
-  /// It can also return null when there is no image selected.
-  /// The function has one required parameter and multiple optional parameters to customize the Image Picker Dialog.
-  /// The only required parameter is [context] which is the [BuildContext] of the application.
-  /// Then you can give the following optional parameters to customize the Image Picker Dialog:
-  /// [title] expects a [String] that is used as the title of the Image Picker Dialog and will be showed at the top of it.
-  /// [titleTextSize] is the font size of the [title].
-  /// [iconSize] is the size of each icon shown in the Image Picker Dialog.
-  /// [iconTextSize] is the size of the text that's show underneath the icon.
-  /// [spaceBetweenIcons] is the size of the space that's between the two icons in the Image Picker Dialog.
-  /// [makePhotoIcon] is the icon as [IconData] that's shown for the make photo button of the Image Picker Dialog.
-  /// [makePhotoText] is the text that's shown underneath the make photo button in the Image Picker Dialog.
-  /// [selectImageIcon] is the icon as [IconData] that's shown for the select image button of the Image Picker Dialog.
-  /// [selectImageText] is the text that's shown underneath the select image button in the Image Picker Dialog.
-  /// [closeButtonText] is the text that's shown on the close dialog button on the bottom of the Image Picker Dialog.
-  Widget showImagePickerDialog(BuildContext context,
-      {String title = ImagePickerDefaultParameters.title,
-      double titleTextSize = ImagePickerDefaultParameters.titleTextSize,
-      double iconSize = ImagePickerDefaultParameters.iconSize,
-      double iconTextSize = ImagePickerDefaultParameters.iconTextSize,
-      double spaceBetweenIcons = ImagePickerDefaultParameters.spaceBetweenIcons,
-      IconData makePhotoIcon = ImagePickerDefaultParameters.makePhotoIcon,
-      String makePhotoText = ImagePickerDefaultParameters.makePhotoText,
-      IconData selectImageIcon = ImagePickerDefaultParameters.selectImageIcon,
-      String selectImageText = ImagePickerDefaultParameters.selectImageText,
-      String closeButtonText = ImagePickerDefaultParameters.closeButtonText}) {
-    return ImagePickerUI().pickImageDialog(
-        context,
-        title,
-        titleTextSize,
-        iconSize,
-        iconTextSize,
-        spaceBetweenIcons,
-        makePhotoIcon,
-        makePhotoText,
-        selectImageIcon,
-        selectImageText,
-        closeButtonText);
-  }
-}
+export 'src/models/image_picker_theme.dart';
+export 'src/ui/image_picker_ui.dart';

lib/src/models/image_picker_settings.dart

@@ -1,16 +0,0 @@
-import 'package:flutter/material.dart';
-
-/// Default values for all the possible optional parameters to be included in the function call when opening the Image Picker Dialog.
-/// When the function call has no optional parameters included these values will be used.
-class ImagePickerDefaultParameters {
-  static const String title = "Upload Image";
-  static const double titleTextSize = 20;
-  static const double iconSize = 125;
-  static const double iconTextSize = 15;
-  static const double spaceBetweenIcons = 30;
-  static const IconData makePhotoIcon = Icons.camera_alt_rounded;
-  static const String makePhotoText = "Take a Picture";
-  static const IconData selectImageIcon = Icons.image;
-  static const String selectImageText = "Select File";
-  static const String closeButtonText = "Close";
-}

lib/src/models/image_picker_theme.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+
+class ImagePickerTheme {
+  /// The [ImagePickerTheme] is used to style the [ImagePicker].
+
+  const ImagePickerTheme(
+      {this.title = "Upload Image",
+      this.titleTextSize = 20,
+      this.iconSize = 125,
+      this.iconTextSize = 15,
+      this.spaceBetweenIcons = 30,
+      this.makePhotoIcon = Icons.camera_alt_rounded,
+      this.makePhotoText = "Take a Picture",
+      this.selectImageIcon = Icons.image,
+      this.selectImageText = "Select File",
+      this.closeButtonText = "Close"});
+
+  final String title;
+  final double titleTextSize;
+  final double iconSize;
+  final double iconTextSize;
+  final double spaceBetweenIcons;
+  final IconData makePhotoIcon;
+  final String makePhotoText;
+  final IconData selectImageIcon;
+  final String selectImageText;
+  final String closeButtonText;
+}

lib/src/ui/image_picker_ui.dart

@@ -1,51 +1,47 @@
-import 'dart:typed_data';
-
 import 'package:flutter/material.dart';
 import 'package:flutter_image_picker/src/services/image_picker_service.dart';
 import 'package:image_picker/image_picker.dart';
 
-class ImagePickerUI {
+import '../models/image_picker_theme.dart';
+
+class ImagePicker extends StatelessWidget {
+  ImagePicker({Key? key, this.imagePickerTheme = const ImagePickerTheme()})
+      : super(key: key);
+
+  final ImagePickerTheme imagePickerTheme;
+
   final ImagePickerService _imagePickerService = ImagePickerService();
 
-  /// [pickImageDialog] returns a [ModalBottomSheet] widget that displays two icons.
-  /// When clicked on the left icon the user can pick an image from their documents on their phone.
-  /// When clicked on the right icon the user can make a photo with the camera on their phone.
-  /// The function gets all the parameters from the [image_picker] class where a function provides them all.
-  /// See that function for a description of each parameter.
-  /// The [pickImageDialog] function can return a [Uint8List] that is the picked image as a bytes list.
-  /// It can also return null when no image gets chosen.
-  Widget pickImageDialog(
-      BuildContext context,
-      String title,
-      double titleTextSize,
-      double iconSize,
-      double iconTextSize,
-      double spaceBetweenIcons,
-      IconData makePhotoIcon,
-      String makePhotoText,
-      IconData selectImageIcon,
-      String selectImageText,
-      String closeButtonText) {
+  @override
+  Widget build(BuildContext context) {
     return Wrap(
       children: <Widget>[
         ListTile(
           title: Text(
-            title,
+            imagePickerTheme.title,
             style: TextStyle(
-              fontSize: titleTextSize,
+              fontSize: imagePickerTheme.titleTextSize,
             ),
           ),
         ),
         Row(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            _generateIconButtonWithText(context, selectImageIcon, iconSize,
-                iconTextSize, ImageSource.gallery, selectImageText),
+            _generateIconButtonWithText(
+                context,
+                imagePickerTheme,
+                imagePickerTheme.selectImageIcon,
+                ImageSource.gallery,
+                imagePickerTheme.selectImageText),
             SizedBox(
-              width: spaceBetweenIcons,
+              width: imagePickerTheme.spaceBetweenIcons,
             ),
-            _generateIconButtonWithText(context, makePhotoIcon, iconSize,
-                iconTextSize, ImageSource.camera, makePhotoText),
+            _generateIconButtonWithText(
+                context,
+                imagePickerTheme,
+                imagePickerTheme.makePhotoIcon,
+                ImageSource.camera,
+                imagePickerTheme.makePhotoText),
           ],
         ),
         Row(
@@ -56,7 +52,7 @@ class ImagePickerUI {
               height: 40,
               child: ElevatedButton(
                   onPressed: () => Navigator.of(context).pop(),
-                  child: Text(closeButtonText)),
+                  child: Text(imagePickerTheme.closeButtonText)),
             )
           ],
         ),
@@ -70,16 +66,14 @@ class ImagePickerUI {
   /// 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:
   /// [context] The build context that is required to make the [pickImage] function in [_imagePickerService] work.
+  /// [imagePickerTheme] The ImagePickerTheme that includes all default values for the Image Picker Dialog.
   /// [icon] The icon that needs to be displayed, requires an [IconData] as value to be used.
-  /// [iconSize] The size of the icon.
-  /// [iconTextSize] The size of the text that's displayed underneath the icon.
   /// [imageSource] The type of [ImageSource] to be used to pick an image when pressed on the icon.
   /// [bottomText] The text that's displayed underneath the icon.
   Column _generateIconButtonWithText(
       BuildContext context,
+      ImagePickerTheme imagePickerTheme,
       IconData icon,
-      double iconSize,
-      double iconTextSize,
       ImageSource imageSource,
       String bottomText) {
     return Column(
@@ -88,7 +82,7 @@ class ImagePickerUI {
         IconButton(
           key: Key(bottomText),
           icon: Icon(icon),
-          iconSize: iconSize,
+          iconSize: imagePickerTheme.iconSize,
           onPressed: () async {
             var image = await _imagePickerService.pickImage(imageSource);
             Navigator.of(context).pop(image);
@@ -96,7 +90,7 @@ class ImagePickerUI {
         ),
         Text(
           bottomText,
-          style: TextStyle(fontSize: iconTextSize),
+          style: TextStyle(fontSize: imagePickerTheme.iconTextSize),
         ),
         const SizedBox(
           height: 20,