Some Changes

Author: yashugarg

lib/src/simulations/bubble_sort.dart

@@ -49,37 +49,33 @@ class _BubbleSortBarsState extends State<BubbleSortBars> {
   }
 
   _initialize() {
-    barColor.clear();
     if (refresh) {
+      barColor.clear();
       _elements.clear();
       _index.clear();
       i = 0;
       var rng = new Random();
       for (int i = 0; i < _numberOfElements; i++) {
         _elements.add(rng.nextInt(400));
         _index.add(i);
+        barColor.add(Theme.of(context).primaryColor);
       }
       n = _elements.length;
     }
     this.barwidth = MediaQuery.of(context).size.width / (_elements.length + 1);
-    for (int j = 0; j < _elements.length; j++) {
-      if (n == 1)
-        barColor.add(Colors.greenAccent[400]);
-      else {
-        if (j == i)
-          barColor.add(Colors.red);
-        else if (j == i - 1)
-          barColor.add(Colors.blue);
-        else
-          barColor.add(Theme.of(context).primaryColor);
-      }
-    }
   }
 
   nextStep() async {
     await Future.delayed(Duration(milliseconds: delay));
     setState(() {
-      for (int k = 0; k < _numberOfElements; k++) _index[k] = k;
+      barColor.clear();
+      for (int j = 0; j < _elements.length; j++) {
+        if (n == 1)
+          barColor.add(Colors.greenAccent[400]);
+        else
+          barColor.add(Theme.of(context).primaryColor);
+        _index[j] = j;
+      }
       if (n == 1) {
         animating = false;
         return;
@@ -100,6 +96,8 @@ class _BubbleSortBarsState extends State<BubbleSortBars> {
       } else {
         i++;
       }
+      barColor[i] = Colors.red;
+      barColor[i - 1] = Colors.blue;
     });
   }
 
@@ -233,7 +231,7 @@ class _BubbleSortBarsState extends State<BubbleSortBars> {
               ),
               Center(
                 child: Text(
-                  "Delay: ${delay2/1000.toInt()} s",
+                  "Delay: ${delay2 / 1000.toInt()} s",
                   style: TextStyle(
                     fontSize: 18,
                     fontFamily: 'Ubuntu',

pubspec.yaml

@@ -14,7 +14,7 @@ description: A new Flutter project.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.2.2 <3.0.0"
 
 dependencies:
   flutter: