refactor: rename opacity indicator

Author: gonuit

example/lib/main.dart

@@ -5,7 +5,7 @@ import 'package:example/screens/programmatically_controlled_indicator_screen.dar
 import 'package:example/widgets/web_frame.dart';
 import 'package:flutter/material.dart';
 
-import 'screens/example_indicator_screen.dart';
+import 'screens/opacity_indicator_screen.dart';
 import 'screens/fetch_more_screen.dart';
 import 'screens/ice_cream_indicator_screen.dart';
 import 'screens/plane_indicator_screen.dart';
@@ -29,7 +29,7 @@ class MyApp extends StatelessWidget {
       home: const MainScreen(),
       builder: (context, child) => WebFrame(child: child),
       routes: {
-        '/example': (context) => const ExampleIndicatorScreen(),
+        '/example': (context) => const OpacityIndicatorScreen(),
         '/plane': (context) => const PlaneIndicatorScreen(),
         '/ice-cream': (context) => const IceCreamIndicatorScreen(),
         '/presentation': (context) => const PresentationScreen(),
@@ -38,7 +38,8 @@ class MyApp extends StatelessWidget {
         '/envelope': (context) => const EnvelopIndicatorScreen(),
         '/fetch-more': (context) => const FetchMoreScreen(),
         '/horizontal': (context) => const HorizontalScreen(),
-        '/programmatically-controlled': (context) => const ProgrammaticallyControlled(),
+        '/programmatically-controlled': (context) =>
+            const ProgrammaticallyControlled(),
       },
     );
   }
@@ -85,7 +86,8 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: const Text("Custom material indicator with list opacity"),
+                child:
+                    const Text("Custom material indicator with list opacity"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,

example/lib/screens/example_indicator_screen.dart renamed to example/lib/screens/opacity_indicator_screen.dart

@@ -3,8 +3,8 @@ import 'package:example/widgets/example_app_bar.dart';
 import 'package:example/widgets/example_list.dart';
 import 'package:flutter/material.dart';
 
-class ExampleIndicatorScreen extends StatelessWidget {
-  const ExampleIndicatorScreen({super.key});
+class OpacityIndicatorScreen extends StatelessWidget {
+  const OpacityIndicatorScreen({super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -23,7 +23,8 @@ class ExampleIndicatorScreen extends StatelessWidget {
           },
           scrollableBuilder: (context, child, controller) {
             return FadeTransition(
-              opacity: Tween(begin: 1.0, end: 0.0).animate(controller.clamp(0.0, 1.0)),
+              opacity: Tween(begin: 1.0, end: 0.0)
+                  .animate(controller.clamp(0.0, 1.0)),
               child: child,
             );
           },