🔥 Code cleanup.

Author: AlexV525

example/lib/main.dart

@@ -45,7 +45,7 @@ class _MyHomePageState extends State<MyHomePage> {
           );
         },
         tooltip: 'Increment',
-        child: Icon(Icons.camera_enhance),
+        child: const Icon(Icons.camera_enhance),
       ),
     );
   }

lib/src/widget/camera_picker.dart

@@ -531,8 +531,8 @@ class CameraPickerState extends State<CameraPicker> {
   Widget get switchCamerasButton {
     return InkWell(
       onTap: switchCameras,
-      child: Padding(
-        padding: const EdgeInsets.all(8.0),
+      child: const Padding(
+        padding: EdgeInsets.all(8.0),
         child: Icon(
           Icons.switch_camera,
           color: Colors.white,
@@ -596,7 +596,7 @@ class CameraPickerState extends State<CameraPicker> {
           color: Colors.white,
           shape: BoxShape.circle,
         ),
-        child: Center(
+        child: const Center(
           child: Icon(
             Icons.keyboard_arrow_down,
             color: Colors.black,
@@ -634,7 +634,7 @@ class CameraPickerState extends State<CameraPicker> {
                   padding: EdgeInsets.all(
                     Screens.width / (isShootingButtonAnimate ? 10 : 35),
                   ),
-                  decoration: BoxDecoration(
+                  decoration: const BoxDecoration(
                     color: Colors.white30,
                     shape: BoxShape.circle,
                   ),

lib/src/widget/camera_picker_viewer.dart

@@ -254,7 +254,7 @@ class _CameraPickerViewerState extends State<CameraPickerViewer> {
           color: Colors.white,
           shape: BoxShape.circle,
         ),
-        child: Center(
+        child: const Center(
           child: Icon(
             Icons.close,
             color: Colors.black,
@@ -302,7 +302,7 @@ class _CameraPickerViewerState extends State<CameraPickerViewer> {
           child: GestureDetector(
             onTap: playButtonCallback,
             child: DecoratedBox(
-              decoration: BoxDecoration(
+              decoration: const BoxDecoration(
                 boxShadow: <BoxShadow>[BoxShadow(color: Colors.black12)],
                 shape: BoxShape.circle,
               ),

lib/src/widget/circular_progress_bar.dart

@@ -120,9 +120,7 @@ class ProgressPainter extends CustomPainter {
     final double outerRadius = center;
     final double innerRadius = center - ringsWidth * 2;
 
-//    if (progress > 0.0) {
     final double progressWidth = outerRadius - innerRadius;
-//      if (radians > 0.0) {
     canvas.save();
     canvas.translate(0.0, size.width);
     canvas.rotate(-90.0.toRad);
@@ -137,8 +135,6 @@ class ProgressPainter extends CustomPainter {
     canvas
       ..drawArc(arcRect, 0, radians, false, progressPaint)
       ..restore();
-//      }
-//    }
   }
 
   @override
@@ -147,6 +143,4 @@ class ProgressPainter extends CustomPainter {
 
 extension _MathExtension on double {
   double get toRad => this * (math.pi / 180.0);
-
-  double get toDeg => this * (180.0 / math.pi);
 }