import 'package:flutter/material.dart';
MaterialApp(
   ThemeData(
        name: "Majid Hajian",
        location: "Oslo, Norway",
        description: '''
                Google Developer Expert
        	Passionate Software engineer, 
	        Community Leader, Author and international Speaker
         ''',
        main: "Head of DevRel at Invertase.io",
        homepage: "https://www.majidhajian.com",
        socials: {
          twitter: "https://www.twitter.com/mhadaily",
          github: "https://www.github.com/mhadaily"
        },
        author: {
          Pluralsight: "www.pluralsight.com/authors/majid-hajian",
          Apress: "Progressive Web App with Angular, Book",
          PacktPub: "PWA development",
          Udemy: "PWA development",
        }
        founder: "Softiware As (www.Softiware.com)"
        devDependencies: {
          tea: "Ginger", 
          mac: "10.14+",
        },
        community: {
          FlutterVikings: "Orginizer", 
          FlutterCommunity: "Admin/Lead",
          ...more
        },
        ),
       );

Column(
    mainAxisAlignment: MainAxisAlignment.center,
    children: [
    	Text('Double Whistle'),
        Text('7th-8th century'),
    ]

)

MaterialApp(

	theme: ThemeData(...)

)

Column(
    mainAxisAlignment: MainAxisAlignment.center,
    children: [
      Text('Double Whistle'),
      Text(
       '7th-8th century',
       style: Theme.of(context).textTheme.headlineSmall,
      ),
    ]

)

MaterialApp(

	theme: ThemeData(
    	...
        headlineSmall: ...
    	
    )

)

theme: ThemeData(
    ...
    headlineSmall: ...
    elevatedButtonTheme: ElevatedButtonThemeData(
      style: TextButton.styleFrom(
      backgroundColor: Colors.black
   )
  )
 )

CustomPaint(
  painter: YourPainter(),
  child: ...
);


class PathPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Paint paint = Paint()
      ..color = Colors.red
      ..style = PaintingStyle.stroke
      ..strokeWidth = 8.0;

    Path path = Path();
    path.lineTo(size.width, size.height);
    canvas.drawPath(path, paint);
  }
  
  ...
}

controller = AnimationController(
      vsync: this,
      duration: const Duration(seconds: 1),
);

animation = TweenSequence(points).animate(controller)

TextStyle(
  fontFamily: 'RobotoFlex',
  fontSize: 18,
  fontVariations:[
    FontVariation('wght', 374),
    FontVariation('wdth', 118)
  ],
)

// GLSL
void loadMyShader() async {
  var program = await FragmentProgram.fromAsset('shaders/myshader.frag');
}



void updateShader(Canvas canvas, Rect rect, FragmentProgram program) {
  var shader = program.fragmentShader();
  shader.setFloat(0, 42.0);
  canvas.drawRect(rect, Paint()..shader = shader);
}

import 'dart:ffi'; // For FFI
import 'dart:io'; // For Platform.isX

final DynamicLibrary nativeAddLib = Platform.isAndroid
    ? DynamicLibrary.open('libnative_add.so')
    : DynamicLibrary.process();
    
    
final int Function(int x, int y) nativeAdd = nativeAddLib
    .lookup<NativeFunction<Int32 Function(Int32, Int32)>>('native_add')
    .asFunction();