theme mode and accent color

Author: VikramadityaDev

lib/utils/my_states.dart

@@ -0,0 +1,68 @@
+import 'package:flutter/material.dart';
+import 'package:text_to_image_gen/utils/prefs_manager.dart';
+
+class ThemeState extends ChangeNotifier {
+  int currentThemeIndex = 0;
+  ThemeMode currentThemeMode = ThemeMode.light;
+  final List<ThemeMode> _themeModes = [
+    ThemeMode.light,
+    ThemeMode.dark,
+    ThemeMode.system
+  ];
+  void getTheme() async {
+    currentThemeIndex = await PrefManager().getThemeIndex();
+    currentThemeMode = _themeModes[currentThemeIndex];
+    currentAccentIndex = await PrefManager().getAccentIndex();
+    currentAccent = accentColors[currentAccentIndex];
+    notifyListeners();
+  }
+
+  changeThemeMode(index) {
+    currentThemeMode = _themeModes[index];
+    currentThemeIndex = index;
+    notifyListeners();
+    PrefManager().saveThemeIndex(index);
+  }
+
+  ThemeData getDarkTheme() {
+    return ThemeData(
+      useMaterial3: true,
+      brightness: Brightness.dark,
+      colorSchemeSeed: currentAccent,
+    );
+  }
+
+  ThemeData getLightTheme() {
+    return ThemeData(
+      useMaterial3: true,
+      colorSchemeSeed: currentAccent,
+    );
+  }
+
+  // For Accent colors
+  int currentAccentIndex = 0;
+  List<Color> accentColors = [
+    Colors.amber,
+    Colors.purple,
+    Colors.cyan,
+    Colors.greenAccent,
+    Colors.lime,
+    Colors.redAccent
+  ];
+  List<Text> accentTexts = [
+    const Text("Amber"),
+    const Text("Purple"),
+    const Text("Cyan"),
+    const Text("Green Accent"),
+    const Text("Lime"),
+    const Text("Red Accent")
+  ];
+  Color currentAccent = Colors.amber;
+
+  changeAccent(index) {
+    currentAccent = accentColors[index];
+    currentAccentIndex = index;
+    notifyListeners();
+    PrefManager().saveAccentIndex(index);
+  }
+}