themes setup

FrontEnd/lib/theme/theme_constant.dart

+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+
+const Color primaryColor = Colors.green;
+ThemeData lightTheme = ThemeData(
+  textTheme: GoogleFonts.latoTextTheme(),
+  brightness: Brightness.light,
+  primaryTextTheme: const TextTheme(),
+  colorScheme: const ColorScheme.light(
+    primary: primaryColor,
+  ),
+  appBarTheme: const AppBarTheme(
+    backgroundColor: primaryColor,
+    elevation: 0,
+    iconTheme: IconThemeData(
+      color: Colors.white,
+    ),
+    titleTextStyle: TextStyle(
+      color: Colors.white,
+      fontWeight: FontWeight.bold,
+      fontSize: 20,
+    ),
+  ),
+  drawerTheme: const DrawerThemeData(
+    elevation: 0,
+    backgroundColor: Colors.white,
+    endShape: RoundedRectangleBorder(
+      borderRadius: BorderRadius.only(
+        topLeft: Radius.circular(20),
+        bottomRight: Radius.circular(20),
+      ),
+    ),
+  ),
+  floatingActionButtonTheme: const FloatingActionButtonThemeData(
+    backgroundColor: primaryColor,
+    foregroundColor: Colors.white,
+  ),
+  primaryColor: primaryColor,
+  bottomNavigationBarTheme: const BottomNavigationBarThemeData(
+    backgroundColor: Colors.white,
+    selectedItemColor: primaryColor,
+    unselectedItemColor: Colors.black,
+    selectedIconTheme: IconThemeData(
+      color: primaryColor,
+    ),
+    unselectedIconTheme: IconThemeData(
+      color: Colors.black,
+    ),
+    selectedLabelStyle: TextStyle(
+      fontWeight: FontWeight.w600,
+    ),
+    unselectedLabelStyle: TextStyle(
+      fontWeight: FontWeight.w600,
+    ),
+  ),
+  elevatedButtonTheme: ElevatedButtonThemeData(
+    style: ElevatedButton.styleFrom(
+      padding: const EdgeInsets.fromLTRB(30, 15, 30, 15),
+      textStyle: const TextStyle(
+        fontSize: 20,
+        fontWeight: FontWeight.bold,
+      ),
+      backgroundColor: primaryColor,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.only(
+          topLeft: Radius.circular(20),
+          bottomRight: Radius.circular(20),
+        ),
+      ),
+    ),
+  ),
+  inputDecorationTheme: InputDecorationTheme(
+    border: OutlineInputBorder(
+      borderRadius: BorderRadius.circular(10),
+    ),
+    focusColor: primaryColor,
+    focusedBorder: OutlineInputBorder(
+      borderRadius: BorderRadius.circular(10),
+      borderSide: const BorderSide(color: primaryColor),
+    ),
+  ),
+);
+
+ThemeData darkTheme = ThemeData(
+  brightness: Brightness.dark,
+);

FrontEnd/lib/theme/theme_manager.dart

+import 'package:flutter/material.dart';
+
+class ThemeManager with ChangeNotifier {
+  ThemeMode _themeMode = ThemeMode.light;
+  get themeMode => _themeMode;
+
+  toggleTheme(bool isDark) {
+    _themeMode = isDark ? ThemeMode.dark : ThemeMode.light;
+    notifyListeners();
+  }
+}