Improve shuffling indicator

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.26
-app.versionCode=26
+app.versionName=0.0.27
+app.versionCode=27

lib/provider/data.dart

@@ -13,7 +13,7 @@ class Data extends ChangeNotifier {
   List _tiles = [];
 
   // application state
-  bool _shuffling = false;
+  bool _isShufflingBoard = false;
   bool _displayTipImage = false;
 
   String get image => _image;
@@ -44,10 +44,10 @@ class Data extends ChangeNotifier {
     notifyListeners();
   }
 
-  bool get shuffling => _shuffling;
+  bool get isShufflingBoard => _isShufflingBoard;
 
-  set updateShuffling(bool value) {
-    _shuffling = value;
+  set updateIsShufflingBoard(bool value) {
+    _isShufflingBoard = value;
     notifyListeners();
   }
 

lib/screens/home.dart

+import 'dart:async';
 import 'dart:typed_data';
 import 'dart:math';
 
@@ -41,10 +42,11 @@ class Home extends StatelessWidget {
   }
 
   Future<void> selectImage(Data myProvider, String imageCode, double tileImageSize) async {
-    myProvider.updateShuffling = true;
+    myProvider.updateIsShufflingBoard = true;
     myProvider.updateImage = imageCode;
-    myProvider.updateTiles = await splitImageInTiles(myProvider, tileImageSize);
-    myProvider.updateShuffling = false;
+    Timer timer = new Timer(new Duration(seconds: 1), () {
+      splitImageInTiles(myProvider, tileImageSize);
+    });
   }
 
   void shuffleImages(Data myProvider) {
@@ -161,7 +163,7 @@ class Home extends StatelessWidget {
     return tiles;
   }
 
-  Future<List<Tile>> splitImageInTiles(Data myProvider, double tileImageSize) async {
+  Future<void> splitImageInTiles(Data myProvider, double tileImageSize) async {
     String imageAsset = getImageAssetName(myProvider.image);
     Uint8List imageData = (await rootBundle.load(imageAsset))
       .buffer
@@ -194,7 +196,8 @@ class Home extends StatelessWidget {
       y += height;
     }
 
-    return shuffleTiles(tiles);
+    myProvider.updateTiles = shuffleTiles(tiles);
+    myProvider.updateIsShufflingBoard = false;
   }
 
   bool _checkTilesetIsOrdered(List<Tile> tiles) {
@@ -307,6 +310,8 @@ class Home extends StatelessWidget {
               color: Colors.black,
             ),
           ),
+          SizedBox(height: 20),
+          CircularProgressIndicator(),
         ],
       ),
     );
@@ -321,7 +326,7 @@ class Home extends StatelessWidget {
     double _selectorImageSize = (MediaQuery.of(context).size.width - 140) / _selectImageColumnsCount;
     double _tileImageSize = (MediaQuery.of(context).size.width - 70) / _myProvider.tilesCount;
 
-    if (_myProvider.shuffling) {
+    if (_myProvider.isShufflingBoard) {
       content = _buildShufflingIndicatorWidget();
     } else {
       if (_myProvider.image == '') {