flutter_scale_kit 1.0.0 
flutter_scale_kit: ^1.0.0 copied to clipboard
A high-performance responsive design package for Flutter with intelligent caching, const widget support, and device-specific scaling strategies. Similar to flutter_screenutil but optimized for better [...]
example/lib/main.dart
import 'package:flutter/material.dart';
import 'package:flutter_scale_kit/flutter_scale_kit.dart';
void main() {
runApp(const MyApp());
}
/// Main app widget - ScaleKitBuilder wraps MaterialApp at the top level
/// This allows ScaleKit to be available throughout the entire app
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return ScaleKitBuilder(
designWidth: 375,
designHeight: 812,
designType: DeviceType.mobile,
child: MaterialApp(
title: 'Flutter Scale Kit - Complete Examples',
debugShowCheckedModeBanner: false,
theme: ResponsiveThemeData.create(
context: context,
colorScheme: ColorScheme.fromSeed(
seedColor: Colors.deepPurple,
brightness: Brightness.light,
),
useMaterial3: true,
),
home: const HomePage(),
),
);
}
}
/// Main example page with comprehensive demonstrations
class HomePage extends StatelessWidget {
const HomePage({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Flutter Scale Kit Examples'),
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
elevation: 0,
),
body: SingleChildScrollView(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Quick Start Section
_buildSectionTitle(
'🚀 Quick Start',
'Extension methods (.w, .h, .sp)',
),
SizedBox(height: 12.h),
_buildQuickStartExample(),
SizedBox(height: 24.h),
// Extension Methods
_buildSectionTitle(
'📐 Extension Methods',
'All available extensions',
),
SizedBox(height: 12.h),
_buildExtensionMethodsExample(),
SizedBox(height: 24.h),
// SKit Helper Class
_buildSectionTitle(
'🛠️ SKit Helper Class',
'Short and easy to use',
),
SizedBox(height: 12.h),
_buildSKitHelperExample(),
SizedBox(height: 24.h),
// Size System
_buildSectionTitle('📏 Size System', 'xs, sm, md, lg, xl, xxl'),
SizedBox(height: 12.h),
_buildSizeSystemExample(),
SizedBox(height: 24.h),
// Text Size System
_buildSectionTitle('🔤 Text Size System', 'SKTextSize (s6 to s52)'),
SizedBox(height: 12.h),
_buildTextSizeSystemExample(),
SizedBox(height: 24.h),
// SKitTheme - Centralized Design
_buildSectionTitle(
'🎨 SKitTheme',
'Define all values in one place',
),
SizedBox(height: 12.h),
_buildSKitThemeExample(),
SizedBox(height: 24.h),
// Optimized Widgets
_buildSectionTitle(
'⚡ Optimized Widgets',
'SKPadding, SKContainer, HSpace, VSpace',
),
SizedBox(height: 12.h),
_buildOptimizedWidgetsExample(),
SizedBox(height: 24.h),
// Context Extensions
_buildSectionTitle(
'🔗 Context Extensions',
'context.scalePadding(), context.isMobile',
),
SizedBox(height: 12.h),
_buildContextExtensionsExample(context),
SizedBox(height: 24.h),
// ScaleManager Direct Usage
_buildSectionTitle('⚙️ ScaleManager', 'Direct API access'),
SizedBox(height: 12.h),
_buildScaleManagerExample(),
SizedBox(height: 24.h),
// Device Information
_buildSectionTitle(
'📱 Device Information',
'All available properties',
),
SizedBox(height: 12.h),
_buildDeviceInfoExample(context),
SizedBox(height: 24.h),
// Performance Tips
_buildSectionTitle('💡 Performance Tips', 'Best practices'),
SizedBox(height: 12.h),
_buildPerformanceTipsExample(),
SizedBox(height: 24.h),
],
),
),
);
}
Widget _buildSectionTitle(String title, String subtitle) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
title,
style: TextStyle(
fontSize: 22.sp,
fontWeight: FontWeight.bold,
color: Colors.deepPurple,
),
),
SizedBox(height: 4.h),
Text(
subtitle,
style: TextStyle(
fontSize: 14.sp,
color: Colors.grey.shade600,
fontStyle: FontStyle.italic,
),
),
],
);
}
// ============================================================================
// QUICK START EXAMPLE
// ============================================================================
Widget _buildQuickStartExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Basic Usage (Like flutter_screenutil)',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
Container(
width: 200.w,
height: 100.h,
decoration: BoxDecoration(
color: Colors.blue.shade100,
borderRadius: BorderRadius.circular(12.r),
),
padding: EdgeInsets.all(16.w),
child: Center(
child: Text(
'200.w × 100.h',
style: TextStyle(
fontSize: 16.sp,
fontWeight: FontWeight.bold,
),
),
),
),
SizedBox(height: 12.h),
Text(
'Code:',
style: TextStyle(fontSize: 12.sp, fontWeight: FontWeight.bold),
),
Container(
padding: EdgeInsets.all(8.w),
decoration: BoxDecoration(
color: Colors.grey.shade100,
borderRadius: BorderRadius.circular(4.r),
),
child: Text(
'Container(\n'
' width: 200.w,\n'
' height: 100.h,\n'
' borderRadius: BorderRadius.circular(12.r),\n'
' child: Text(\'Hello\', style: TextStyle(fontSize: 16.sp)),\n'
')',
style: TextStyle(
fontSize: 11.sp,
fontFamily: 'monospace',
color: Colors.grey.shade800,
),
),
),
],
),
),
);
}
// ============================================================================
// EXTENSION METHODS EXAMPLE
// ============================================================================
Widget _buildExtensionMethodsExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'All Extension Methods',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
_buildExtensionRow('.w - Width scaling', '200.w', 200.w),
_buildExtensionRow('.h - Height scaling', '100.h', 100.h),
_buildExtensionRow('.sp - Font size', '16.sp', 16.sp),
_buildExtensionRow('.r - Border radius', '12.r', 12.r),
_buildExtensionRow('.sw - Screen width %', '0.5.sw', 0.5.sw),
_buildExtensionRow('.sh - Screen height %', '0.3.sh', 0.3.sh),
_buildExtensionRow('.spf - Font with factor', '14.spf', 14.spf),
SizedBox(height: 12.h),
Container(
width: 0.5.sw,
height: 80.h,
decoration: BoxDecoration(
color: Colors.orange.shade100,
borderRadius: BorderRadius.circular(12.r),
),
child: Center(
child: Text(
'50% Screen Width',
style: TextStyle(
fontSize: 18.sp,
fontWeight: FontWeight.bold,
),
),
),
),
],
),
),
);
}
Widget _buildExtensionRow(String label, String code, double value) {
return Padding(
padding: EdgeInsets.only(bottom: 8.h),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
label,
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.w500,
),
),
Text(
code,
style: TextStyle(
fontSize: 11.sp,
color: Colors.grey.shade600,
fontFamily: 'monospace',
),
),
],
),
),
Text(
value.toStringAsFixed(1),
style: TextStyle(fontSize: 14.sp, color: Colors.deepPurple),
),
],
),
);
}
// ============================================================================
// SKIT HELPER CLASS EXAMPLE
// ============================================================================
Widget _buildSKitHelperExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'SKit Helper Methods',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
Text(
'Padding:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.padding(
all: 16,
child: Container(
color: Colors.blue.shade100,
padding: EdgeInsets.all(8.w),
child: Text(
'SKit.padding(all: 16)',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 12.h),
Text(
'Margin:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.margin(
12,
Container(
color: Colors.green.shade100,
padding: EdgeInsets.all(8.w),
child: Text(
'SKit.margin(12)',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 12.h),
Text(
'Rounded Container:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.roundedContainer(
all: 16,
color: Colors.purple.shade100,
child: Padding(
padding: EdgeInsets.all(12.w),
child: Text(
'SKit.roundedContainer(all: 16)',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 12.h),
Text(
'Container with Border (All Sides):',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.roundedContainer(
all: 12,
color: Colors.blue.shade50,
borderColor: Colors.blue,
borderWidth: 2,
child: Padding(
padding: EdgeInsets.all(12.w),
child: Text(
'Border on all sides',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 12.h),
Text(
'Container with Border on Specific Sides:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.roundedContainer(
all: 12,
color: Colors.green.shade50,
borderTop: true,
borderBottom: true,
borderColor: Colors.green,
borderWidth: 2,
child: Padding(
padding: EdgeInsets.all(12.w),
child: Text(
'Border on top & bottom only',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 8.h),
SKit.roundedContainer(
all: 12,
color: Colors.orange.shade50,
borderLeft: true,
borderRight: true,
borderColor: Colors.orange,
borderWidth: 2,
child: Padding(
padding: EdgeInsets.all(12.w),
child: Text(
'Border on left & right only',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 8.h),
SKit.roundedContainer(
all: 12,
color: Colors.pink.shade50,
borderTop: true,
borderTopColor: Colors.red,
borderTopWidth: 3,
borderBottom: true,
borderBottomColor: Colors.blue,
borderBottomWidth: 2,
child: Padding(
padding: EdgeInsets.all(12.w),
child: Text(
'Different colors & widths',
style: TextStyle(fontSize: 14.sp),
),
),
),
SizedBox(height: 12.h),
Text(
'Spacing:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Row(
children: [
Container(
width: 40.w,
height: 40.w,
color: Colors.red.shade200,
),
SKit.hSpace(16),
Container(
width: 40.w,
height: 40.w,
color: Colors.blue.shade200,
),
SKit.hSpace(24),
Container(
width: 40.w,
height: 40.w,
color: Colors.green.shade200,
),
],
),
SizedBox(height: 12.h),
Column(
children: [
Container(
width: 100.w,
height: 40.w,
color: Colors.orange.shade200,
),
SKit.vSpace(16),
Container(
width: 100.w,
height: 40.w,
color: Colors.pink.shade200,
),
],
),
SizedBox(height: 12.h),
Text(
'Text:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.text(
'SKit.text() with scaled fontSize',
fontSize: 16,
fontWeight: FontWeight.bold,
color: Colors.deepPurple,
),
SizedBox(height: 8.h),
Text(
'SKit.textStyle() for custom styles',
style: SKit.textStyle(
fontSize: 14,
color: Colors.blue,
fontWeight: FontWeight.w500,
),
),
],
),
),
);
}
// ============================================================================
// SIZE SYSTEM EXAMPLE
// ============================================================================
Widget _buildSizeSystemExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Size System (SKSize)',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Text(
'Default: xs=2, sm=4, md=8, lg=12, xl=16, xxl=24',
style: TextStyle(fontSize: 12.sp, color: Colors.grey.shade600),
),
SizedBox(height: 12.h),
// Size enum examples
Wrap(
spacing: 8.w,
runSpacing: 8.h,
children: [
_buildSizeBox('xs', SKSize.xs, Colors.red.shade100),
_buildSizeBox('sm', SKSize.sm, Colors.orange.shade100),
_buildSizeBox('md', SKSize.md, Colors.yellow.shade100),
_buildSizeBox('lg', SKSize.lg, Colors.green.shade100),
_buildSizeBox('xl', SKSize.xl, Colors.blue.shade100),
_buildSizeBox('xxl', SKSize.xxl, Colors.purple.shade100),
],
),
SizedBox(height: 16.h),
Text(
'Using Size Enums:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.paddingSize(
all: SKSize.md,
child: SKit.roundedContainerSize(
all: SKSize.md,
color: Colors.purple.shade100,
child: Padding(
padding: SKit.paddingEdgeInsetsSize(all: SKSize.sm),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'SKit.paddingSize(all: SKSize.md)',
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 8.h),
Text(
'SKit.roundedContainerSize(all: SKSize.md)',
style: TextStyle(fontSize: 12.sp),
),
],
),
),
),
),
SizedBox(height: 16.h),
Text(
'Custom Size Values:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Builder(
builder: (context) {
setPaddingSizes(
SizeValues.custom(
xs: 4,
sm: 8,
md: 16,
lg: 24,
xl: 32,
xxl: 48,
),
);
setRadiusSizes(
SizeValues.custom(
xs: 2,
sm: 4,
md: 8,
lg: 12,
xl: 16,
xxl: 24,
),
);
return SKit.paddingSize(
all: SKSize.md,
child: SKit.roundedContainerSize(
all: SKSize.md,
color: Colors.green.shade100,
child: Padding(
padding: SKit.paddingEdgeInsetsSize(all: SKSize.sm),
child: Text(
'Custom sizes: md padding=16, md radius=8',
style: TextStyle(fontSize: 12.sp),
),
),
),
);
},
),
SizedBox(height: 16.h),
Text(
'Default Values (Use without parameters):',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Builder(
builder: (context) {
setDefaultPadding(20);
setDefaultMargin(10);
setDefaultRadius(15);
setDefaultSpacing(12);
return SKit.pad(
SKit.margin(
SKit.rounded(
null,
Padding(
padding: EdgeInsets.all(12.w),
child: Column(
children: [
Text(
'SKit.pad() - uses default (20)',
style: TextStyle(fontSize: 12.sp),
),
SizedBox(height: 8.h),
Text(
'SKit.margin() - uses default (10)',
style: TextStyle(fontSize: 12.sp),
),
SizedBox(height: 8.h),
Text(
'SKit.rounded() - uses default (15)',
style: TextStyle(fontSize: 12.sp),
),
],
),
),
Colors.orange.shade100,
),
),
);
},
),
],
),
),
);
}
Widget _buildSizeBox(String label, SKSize size, Color color) {
final value = paddingSizes.get(size);
return Container(
width: 50.w + value.toDouble(),
height: 50.h + value.toDouble(),
decoration: BoxDecoration(
color: color,
borderRadius: BorderRadius.circular(8.r),
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
label,
style: TextStyle(fontSize: 10.sp, fontWeight: FontWeight.bold),
),
Text(value.toStringAsFixed(0), style: TextStyle(fontSize: 9.sp)),
],
),
);
}
// ============================================================================
// TEXT SIZE SYSTEM EXAMPLE
// ============================================================================
Widget _buildTextSizeSystemExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Text Size System (SKTextSize)',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Text(
'Sizes: s6, s8, s10, s11, s12, s13, s14, s15, s16, s17, s18, s20, s22, s24, s26, s28, s30, s32, s34, s36, s40, s48, s52',
style: TextStyle(fontSize: 11.sp, color: Colors.grey.shade600),
),
SizedBox(height: 12.h),
// Small sizes
Text(
'Small Sizes:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.text('s10 - Small labels', textSize: SKTextSize.s10),
SKit.text('s12 - Body small', textSize: SKTextSize.s12),
SKit.text('s14 - Body medium (default)', textSize: SKTextSize.s14),
SizedBox(height: 12.h),
// Medium sizes
Text(
'Medium Sizes:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.text('s16 - Body large', textSize: SKTextSize.s16),
SKit.text('s18 - Subheadline', textSize: SKTextSize.s18),
SizedBox(height: 12.h),
// Large sizes
Text(
'Large Sizes:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.text(
's20 - Headline small',
textSize: SKTextSize.s20,
fontWeight: FontWeight.bold,
),
SKit.text(
's24 - Headline large',
textSize: SKTextSize.s24,
fontWeight: FontWeight.bold,
),
SizedBox(height: 12.h),
// Very large sizes
Text(
'Very Large Sizes:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
SKit.text(
's32 - Display',
textSize: SKTextSize.s32,
fontWeight: FontWeight.bold,
),
SKit.text(
's48 - Hero text',
textSize: SKTextSize.s48,
fontWeight: FontWeight.bold,
),
SizedBox(height: 12.h),
Text(
'Using textStyle() with SKTextSize:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Text(
'Custom text with SKit.textStyle(textSize: SKTextSize.s18)',
style: SKit.textStyle(
textSize: SKTextSize.s18,
color: Colors.deepPurple,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 12.h),
Text(
'Custom Text Sizes:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Builder(
builder: (context) {
setTextSizes(
TextSizeValues.custom(s14: 15, s16: 17, s18: 20, s24: 26),
);
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Custom s14=15, s16=17, s18=20, s24=26',
style: TextStyle(
fontSize: 12.sp,
color: Colors.grey.shade600,
),
),
SizedBox(height: 4.h),
SKit.text('s14 (now 15)', textSize: SKTextSize.s14),
SKit.text('s16 (now 17)', textSize: SKTextSize.s16),
SKit.text('s18 (now 20)', textSize: SKTextSize.s18),
SKit.text('s24 (now 26)', textSize: SKTextSize.s24),
],
);
},
),
],
),
),
);
}
// ============================================================================
// SKITTHEME EXAMPLE
// ============================================================================
Widget _buildSKitThemeExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'SKitTheme - Centralized Design System',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Text(
'Define all your design tokens in one place, compute once, use everywhere!',
style: TextStyle(fontSize: 12.sp, color: Colors.grey.shade600),
),
SizedBox(height: 12.h),
Builder(
builder: (context) {
// Define all design tokens in one place
const theme = SKitTheme(
// Text sizes
textXs: 10,
textSm: 12,
textMd: 14,
textLg: 16,
textXl: 18,
textXxl: 24,
// Padding values
paddingXs: 4,
paddingSm: 8,
paddingMd: 16,
paddingLg: 24,
paddingXl: 32,
// Margin values
marginXs: 4,
marginSm: 8,
marginMd: 16,
marginLg: 24,
// Radius values
radiusXs: 2,
radiusSm: 4,
radiusMd: 8,
radiusLg: 12,
radiusXl: 16,
// Spacing values
spacingXs: 4,
spacingSm: 8,
spacingMd: 16,
spacingLg: 24,
spacingXl: 32,
);
// Compute once - all values are now scaled
final values = theme.compute();
// Use const widgets everywhere with pre-computed values
return Column(
children: [
SKPadding(
padding: values.paddingMd!,
child: SKContainer(
decoration: BoxDecoration(
color: Colors.purple.shade100,
borderRadius: values.borderRadiusMd,
),
padding: values.paddingSm!,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Using SKitTheme.compute()',
style: values.textLg?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.black87,
),
),
if (values.spacingSm != null)
SizedBox(height: values.spacingSm!),
Text(
'Text: textMd (14)',
style: values.textMd?.copyWith(
color: Colors.black87,
),
),
if (values.spacingXs != null)
SizedBox(height: values.spacingXs!),
Text(
'Text: textSm (12)',
style: values.textSm?.copyWith(
color: Colors.black87,
),
),
if (values.spacingXs != null)
SizedBox(height: values.spacingXs!),
Text(
'Padding: paddingMd (16)',
style: values.textSm?.copyWith(
color: Colors.black87,
),
),
Text(
'Radius: radiusMd (8)',
style: values.textSm?.copyWith(
color: Colors.black87,
),
),
],
),
),
),
if (values.spacingMd != null)
SizedBox(height: values.spacingMd!),
Text(
'All values defined once, computed once, used everywhere!',
style: values.textSm?.copyWith(
color: Colors.grey.shade600,
fontStyle: FontStyle.italic,
),
),
],
);
},
),
],
),
),
);
}
// ============================================================================
// OPTIMIZED WIDGETS EXAMPLE
// ============================================================================
Widget _buildOptimizedWidgetsExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Optimized Widgets (SKPadding, SKContainer, HSpace, VSpace)',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
SKPadding(
padding: SKit.paddingEdgeInsets(all: 16),
child: SKContainer(
decoration: BoxDecoration(
color: Colors.blue.shade100,
borderRadius: SKit.borderRadius(all: 12),
),
padding: SKit.paddingEdgeInsets(all: 12),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'SKPadding + SKContainer',
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 8.h),
Text(
'Using optimized widgets for better performance',
style: TextStyle(fontSize: 12.sp),
),
],
),
),
),
SizedBox(height: 12.h),
Text(
'Spacing Widgets:',
style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 8.h),
Row(
children: [
Container(
width: 30.w,
height: 30.w,
color: Colors.red.shade200,
),
SKit.hSpace(12),
Container(
width: 30.w,
height: 30.w,
color: Colors.green.shade200,
),
SKit.hSpace(16),
Container(
width: 30.w,
height: 30.w,
color: Colors.blue.shade200,
),
],
),
SizedBox(height: 12.h),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
width: 100.w,
height: 30.w,
color: Colors.orange.shade200,
),
SKit.vSpace(12),
Container(
width: 100.w,
height: 30.w,
color: Colors.pink.shade200,
),
],
),
SizedBox(height: 12.h),
SKMargin(
margin: SKit.marginEdgeInsets(all: 12),
child: Container(
padding: EdgeInsets.all(12.w),
color: Colors.green.shade100,
child: Text(
'SKMargin - Container with margin',
style: TextStyle(fontSize: 14.sp),
),
),
),
],
),
),
);
}
// ============================================================================
// CONTEXT EXTENSIONS EXAMPLE
// ============================================================================
Widget _buildContextExtensionsExample(BuildContext context) {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Context Extensions',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
Container(
padding: context.scalePadding(horizontal: 20, vertical: 16),
margin: context.scaleMargin(all: 8),
decoration: BoxDecoration(
color: Colors.amber.shade100,
borderRadius: context.scaleBorderRadius(all: 10),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'context.scalePadding(horizontal: 20, vertical: 16)',
style: TextStyle(fontSize: 12.sp),
),
SizedBox(height: 8.h),
Text(
'context.scaleMargin(all: 8)',
style: TextStyle(fontSize: 12.sp),
),
SizedBox(height: 8.h),
Text(
'context.scaleBorderRadius(all: 10)',
style: TextStyle(fontSize: 12.sp),
),
SizedBox(height: 12.h),
Divider(),
SizedBox(height: 8.h),
Text(
'Device Detection:',
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 8.h),
Text(
'Is Mobile: ${context.isMobile}',
style: TextStyle(fontSize: 12.sp),
),
Text(
'Is Tablet: ${context.isTablet}',
style: TextStyle(fontSize: 12.sp),
),
Text(
'Is Desktop: ${context.isDesktop}',
style: TextStyle(fontSize: 12.sp),
),
],
),
),
],
),
),
);
}
// ============================================================================
// SCALEMANAGER EXAMPLE
// ============================================================================
Widget _buildScaleManagerExample() {
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'ScaleManager Direct API',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
Builder(
builder: (context) {
final scale = ScaleManager.instance;
return Container(
width: scale.getWidth(200),
height: scale.getHeight(100),
decoration: BoxDecoration(
color: Colors.purple.shade200,
borderRadius: BorderRadius.circular(scale.getRadius(12)),
),
padding: EdgeInsets.all(16.w),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'ScaleManager.instance',
style: TextStyle(
fontSize: scale.getFontSize(16),
fontWeight: FontWeight.bold,
color: Colors.white,
),
),
SizedBox(height: 8.h),
Text(
'getWidth(200) × getHeight(100)',
style: TextStyle(
fontSize: scale.getFontSize(12),
color: Colors.white70,
),
),
],
),
);
},
),
SizedBox(height: 12.h),
Builder(
builder: (context) {
final scale = ScaleManager.instance;
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Screen Percentage:',
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: 8.h),
Container(
width: scale.getScreenWidth(0.75),
height: 60.h,
decoration: BoxDecoration(
color: Colors.blue.shade200,
borderRadius: BorderRadius.circular(8.r),
),
child: Center(
child: Text(
'75% Screen Width',
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.bold,
),
),
),
),
],
);
},
),
],
),
),
);
}
// ============================================================================
// DEVICE INFORMATION EXAMPLE
// ============================================================================
Widget _buildDeviceInfoExample(BuildContext context) {
final scaleKit = ScaleManager.instance;
return Card(
elevation: 2,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Device Information',
style: TextStyle(fontSize: 16.sp, fontWeight: FontWeight.bold),
),
SizedBox(height: 12.h),
_buildInfoRow(
'Device Type',
DeviceDetector.detectFromContext(context).name,
),
_buildInfoRow(
'Screen Width',
'${scaleKit.screenWidth.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Screen Height',
'${scaleKit.screenHeight.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Pixel Ratio',
scaleKit.pixelRatio.toStringAsFixed(2),
),
_buildInfoRow('Orientation', scaleKit.orientation.name),
_buildInfoRow(
'Status Bar Height',
'${scaleKit.statusBarHeight.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Bottom Bar Height',
'${scaleKit.bottomBarHeight.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Top Safe Height',
'${scaleKit.topSafeHeight.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Bottom Safe Height',
'${scaleKit.bottomSafeHeight.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Safe Area Height',
'${scaleKit.safeAreaHeight.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Safe Area Width',
'${scaleKit.safeAreaWidth.toStringAsFixed(1)}px',
),
_buildInfoRow(
'Text Scale Factor',
scaleKit.textScaleFactor.toStringAsFixed(2),
),
_buildInfoRow(
'Scale Width',
scaleKit.scaleWidth.toStringAsFixed(3),
),
_buildInfoRow(
'Scale Height',
scaleKit.scaleHeight.toStringAsFixed(3),
),
_buildInfoRow('Is Mobile', context.isMobile.toString()),
_buildInfoRow('Is Tablet', context.isTablet.toString()),
_buildInfoRow('Is Desktop', context.isDesktop.toString()),
],
),
),
);
}
Widget _buildInfoRow(String label, String value) {
return Padding(
padding: EdgeInsets.only(bottom: 6.h),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
SizedBox(
width: 140.w,
child: Text(
'$label:',
style: TextStyle(fontSize: 13.sp, fontWeight: FontWeight.w500),
),
),
Expanded(
child: Text(
value,
style: TextStyle(fontSize: 13.sp, color: Colors.grey.shade700),
),
),
],
),
);
}
// ============================================================================
// PERFORMANCE TIPS EXAMPLE
// ============================================================================
Widget _buildPerformanceTipsExample() {
return Card(
elevation: 2,
color: Colors.blue.shade50,
child: Padding(
padding: EdgeInsets.all(16.w),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Icon(Icons.lightbulb_outline, size: 20.sp, color: Colors.blue),
SizedBox(width: 8.w),
Text(
'Performance Tips & Best Practices',
style: TextStyle(
fontSize: 16.sp,
fontWeight: FontWeight.bold,
color: Colors.blue.shade900,
),
),
],
),
SizedBox(height: 12.h),
_buildTip(
'1. Use SKitTheme for const widgets',
'Define all design tokens once, compute once, use everywhere with const widgets for optimal performance.',
),
SizedBox(height: 12.h),
_buildTip(
'2. Use size enums for consistency',
'Use SKSize (xs, sm, md, lg, xl, xxl) and SKTextSize (s6 to s52) for consistent sizing across your app.',
),
SizedBox(height: 12.h),
_buildTip(
'3. Set default values',
'Use setDefaultPadding(), setDefaultMargin(), etc. to use methods without parameters (e.g., SKit.pad()).',
),
SizedBox(height: 12.h),
_buildTip(
'4. Use optimized widgets',
'SKPadding, SKContainer, HSpace, VSpace are optimized for performance and can be used with const.',
),
SizedBox(height: 12.h),
_buildTip(
'5. Cache is automatic',
'ScaleKitBuilder automatically clears cache only on size/orientation changes - no manual cache management needed.',
),
SizedBox(height: 12.h),
_buildTip(
'6. Extension methods are convenient',
'Use .w, .h, .sp, .r, .sw, .sh for quick scaling - they\'re cached and optimized.',
),
],
),
),
);
}
Widget _buildTip(String title, String description) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
title,
style: TextStyle(
fontSize: 14.sp,
fontWeight: FontWeight.bold,
color: Colors.blue.shade900,
),
),
SizedBox(height: 4.h),
Text(
description,
style: TextStyle(fontSize: 12.sp, color: Colors.blue.shade700),
),
],
);
}
}Metadata
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points
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downloads
Publisher
unverified uploader
Weekly Downloads
Metadata
A high-performance responsive design package for Flutter with intelligent caching, const widget support, and device-specific scaling strategies. Similar to flutter_screenutil but optimized for better performance.
Repository (GitHub)
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License
unknown (license)
