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davmar
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/// Material 3 light and dark themes, including typography and component styles.
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library;
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import 'package:flutter/material.dart';
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/// Builds the [ThemeData] used by [MaterialApp] for light and dark mode.
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///
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/// Colors are generated from a single seed so both schemes stay consistent
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/// with Material 3 tonal palettes.
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abstract final class AppTheme {
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static const Color seed = Color(0xFF0F766E);
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static ThemeData light() => _build(Brightness.light);
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static ThemeData dark() => _build(Brightness.dark);
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static ThemeData _build(Brightness brightness) {
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final colorScheme = ColorScheme.fromSeed(
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seedColor: seed,
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brightness: brightness,
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);
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final isDark = brightness == Brightness.dark;
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final textTheme = _textTheme(colorScheme);
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return ThemeData(
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useMaterial3: true,
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colorScheme: colorScheme,
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textTheme: textTheme,
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scaffoldBackgroundColor: colorScheme.surface,
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appBarTheme: AppBarTheme(
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centerTitle: false,
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elevation: 0,
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scrolledUnderElevation: 1,
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backgroundColor: colorScheme.surface,
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foregroundColor: colorScheme.onSurface,
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titleTextStyle: textTheme.titleLarge,
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),
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cardTheme: CardThemeData(
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elevation: 0,
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color: colorScheme.surfaceContainerLow,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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clipBehavior: Clip.antiAlias,
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margin: EdgeInsets.zero,
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),
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navigationBarTheme: NavigationBarThemeData(
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elevation: 0,
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height: 72,
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backgroundColor: colorScheme.surfaceContainer,
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indicatorColor: colorScheme.secondaryContainer,
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labelTextStyle: WidgetStateProperty.resolveWith((states) {
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final selected = states.contains(WidgetState.selected);
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return textTheme.labelMedium?.copyWith(
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fontWeight: selected ? FontWeight.w600 : FontWeight.w500,
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);
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}),
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),
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inputDecorationTheme: InputDecorationTheme(
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filled: true,
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fillColor: colorScheme.surfaceContainerHighest.withValues(alpha: 0.6),
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(12),
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),
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enabledBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(12),
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borderSide: BorderSide(color: colorScheme.outlineVariant),
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),
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focusedBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(12),
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borderSide: BorderSide(color: colorScheme.primary, width: 2),
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),
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contentPadding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 14,
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),
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),
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filledButtonTheme: FilledButtonThemeData(
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style: FilledButton.styleFrom(
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minimumSize: const Size.fromHeight(48),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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textStyle: textTheme.labelLarge,
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),
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),
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floatingActionButtonTheme: FloatingActionButtonThemeData(
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backgroundColor: colorScheme.primary,
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foregroundColor: colorScheme.onPrimary,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(16),
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),
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),
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dividerTheme: DividerThemeData(
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color: colorScheme.outlineVariant,
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space: 1,
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),
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snackBarTheme: SnackBarThemeData(
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behavior: SnackBarBehavior.floating,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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),
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listTileTheme: ListTileThemeData(
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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iconColor: colorScheme.primary,
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),
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shadowColor: isDark ? Colors.black : const Color(0x1A0F172A),
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);
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}
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/// Slightly tighter, more editorial type scale than the Material defaults.
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static TextTheme _textTheme(ColorScheme colors) {
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const family = 'Roboto';
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return TextTheme(
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displaySmall: TextStyle(
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fontFamily: family,
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fontSize: 36,
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fontWeight: FontWeight.w700,
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letterSpacing: -0.5,
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color: colors.onSurface,
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),
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headlineMedium: TextStyle(
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fontFamily: family,
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fontSize: 28,
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fontWeight: FontWeight.w600,
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letterSpacing: -0.3,
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color: colors.onSurface,
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),
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titleLarge: TextStyle(
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fontFamily: family,
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fontSize: 22,
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fontWeight: FontWeight.w600,
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color: colors.onSurface,
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),
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titleMedium: TextStyle(
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fontFamily: family,
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fontSize: 16,
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fontWeight: FontWeight.w600,
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color: colors.onSurface,
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),
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bodyLarge: TextStyle(
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fontFamily: family,
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fontSize: 16,
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height: 1.45,
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color: colors.onSurface,
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),
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bodyMedium: TextStyle(
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fontFamily: family,
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fontSize: 14,
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height: 1.4,
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color: colors.onSurfaceVariant,
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),
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labelLarge: TextStyle(
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fontFamily: family,
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fontSize: 14,
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fontWeight: FontWeight.w600,
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letterSpacing: 0.1,
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color: colors.onPrimary,
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),
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labelMedium: TextStyle(
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fontFamily: family,
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fontSize: 12,
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fontWeight: FontWeight.w500,
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letterSpacing: 0.4,
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color: colors.onSurfaceVariant,
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),
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);
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}
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}
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@@ -0,0 +1,34 @@
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/// Shared string keys, timings, and layout breakpoints used across the app.
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library;
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/// Human-readable name shown in the splash screen, app bars, and About tile.
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const String kAppName = 'MyApp';
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/// Package / Android application id.
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const String kPackageName = 'com.example.myapp';
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/// How long the splash screen stays visible before navigating to the shell.
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const Duration kSplashDuration = Duration(seconds: 2);
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/// SharedPreferences keys.
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abstract final class StorageKeys {
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static const themeMode = 'theme_mode';
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static const useRemoteData = 'use_remote_data';
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}
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/// Named routes registered on [MaterialApp].
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abstract final class AppRoutes {
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static const splash = '/';
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static const shell = '/shell';
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static const itemDetail = '/item';
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static const addItem = '/add-item';
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}
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/// Width thresholds used to adapt padding and card density.
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abstract final class Breakpoints {
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static const compact = 600.0;
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static const medium = 840.0;
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}
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/// Maximum content width on tablets / large phones so lists stay readable.
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const double kMaxContentWidth = 720.0;
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@@ -0,0 +1,59 @@
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/// Small pure helpers for layout, formatting, and user-facing strings.
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library;
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import 'package:flutter/material.dart';
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import 'constants.dart';
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/// Horizontal padding that grows a little on wider screens.
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double pagePadding(double width) {
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if (width >= Breakpoints.medium) return 32;
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if (width >= Breakpoints.compact) return 24;
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return 16;
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}
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/// Formats [date] as `MMM d, y` without pulling in `intl`.
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String formatDate(DateTime date) {
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const months = [
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'Jan',
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'Feb',
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'Mar',
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'Apr',
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'May',
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'Jun',
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'Jul',
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'Aug',
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'Sep',
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'Oct',
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'Nov',
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'Dec',
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];
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return '${months[date.month - 1]} ${date.day}, ${date.year}';
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}
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/// Converts a stored theme key into a [ThemeMode].
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ThemeMode themeModeFromName(String name) {
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return switch (name) {
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'light' => ThemeMode.light,
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'dark' => ThemeMode.dark,
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_ => ThemeMode.system,
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};
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}
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/// Inverse of [themeModeFromName] for persistence.
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String nameFromThemeMode(ThemeMode mode) {
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return switch (mode) {
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ThemeMode.light => 'light',
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ThemeMode.dark => 'dark',
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ThemeMode.system => 'system',
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};
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}
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/// Title-cases a [ThemeMode] for settings labels.
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String labelForThemeMode(ThemeMode mode) {
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return switch (mode) {
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ThemeMode.light => 'Light',
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ThemeMode.dark => 'Dark',
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ThemeMode.system => 'System',
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};
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}
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