prevent 0's added at the beginning

lib/providers/calculate.dart

@@ -139,9 +139,15 @@ class Calculate with ChangeNotifier {
   }
 
   void _getButtonText(String buttonValue) {
-    // any operator excluding -
-    RegExp regExp = RegExp(r'[÷×+]$');
-    if (expression == '0' && regExp.hasMatch(buttonValue)) {
+    // prevents multiple 0 input at the beginning
+    if (expression.startsWith('0') && buttonValue == '0') {
+      _expression = '0';
+      return;
+    }
+
+    // dot and any operator excluding -
+    RegExp regExp1 = RegExp(r'[÷×+]$');
+    if (expression == '0' && regExp1.hasMatch(buttonValue)) {
       // _expression += buttonValue will not work
       // _getExpression() returns exp if string not empty
       // thus _expression will only return buttonValue
@@ -150,7 +156,7 @@ class Calculate with ChangeNotifier {
     }
 
     // prevents spamming of operators
-    if (regExp.hasMatch(expression) && regExp.hasMatch(buttonValue)) {
+    if (regExp1.hasMatch(expression) && regExp1.hasMatch(buttonValue)) {
       _deleteLast(calculate: false);
     }
 
@@ -178,7 +184,14 @@ class Calculate with ChangeNotifier {
       return;
     }
 
-    _expression += buttonValue;
+    // removes 0 at start
+    RegExp regExp4 = RegExp(r'\d');
+    if (expression.startsWith('0') && regExp4.hasMatch(expression)) {
+      _expression = buttonValue;
+    } else {
+      _expression += buttonValue;
+    }
+
     _result = _getResult();
   }
 

lib/providers/color_provider.dart

@@ -8,9 +8,9 @@ const int _brightness = 25;
 class ColorProvider with ChangeNotifier {
   Color _primary;
 
-  var box = Hive.box(boxColor);
+  final _box = Hive.box(boxColor);
 
-  Color get primary => Color(box.get('primary'));
+  Color get primary => Color(_box.get('primary'));
 
   Color get primaryLight => _primaryLight();
 
@@ -20,8 +20,7 @@ class ColorProvider with ChangeNotifier {
 
   updatePrimaryColor(Color color) {
     _primary = _primaryColor(color);
-    final box = Hive.box(boxColor);
-    box.put('primary', _primary.value);
+    _box.put('primary', _primary.value);
     notifyListeners();
   }
 

lib/ui/widgets/shadows.dart

@@ -66,7 +66,7 @@ BoxDecoration innerShadowCircle(BuildContext context) {
         color: _theme.primaryColorLight,
         spreadRadius: 20,
         blurRadius: 45,
-        offset: Offset(0, 8), // changes position of shadow
+        offset: Offset(0, 8),
       ),
     ],
   );

pubspec.yaml

@@ -3,7 +3,7 @@ description: A new Flutter application.
 
 publish_to: 'none'
 
-version: 1.2.1+7
+version: 1.2.2+8
 
 environment:
   sdk: ">=2.7.0 <3.0.0"