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import 'package:flutter/material.dart';

enum CardSuit {
  spades,
  hearts,
  diamonds,
  clubs,
}

enum CardType {

d3xvn

import 'package:flutter/material.dart';
import 'package:solitaire_flutter/playing_card.dart';
import 'package:solitaire_flutter/transformed_card.dart';

typedef Null CardAcceptCallback(List<PlayingCard> card, int fromIndex);

// This is a stack of overlayed cards (implemented using a stack)
class CardColumn extends StatefulWidget {

  // List of cards in the stack

d3xvn

import 'package:flutter/material.dart';
import 'package:solitaire_flutter/card_column.dart';
import 'package:solitaire_flutter/playing_card.dart';
import 'package:solitaire_flutter/transformed_card.dart';

// The deck of cards which accept the final cards (Ace to King)
class EmptyCardDeck extends StatefulWidget {
  final CardSuit cardSuit;
  final List<PlayingCard> cardsAdded;
  final CardAcceptCallback onCardAdded;

d3xvn

import 'package:flutter/material.dart';

class DemoPage extends StatefulWidget {
  @override
  _DemoPageState createState() => _DemoPageState();
}

class _DemoPageState extends State<DemoPage> {
  @override
  Widget build(BuildContext context) {

d3xvn

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
 // This widget is the root of your application.
 @override
 Widget build(BuildContext context) {
   return MaterialApp(
     title: 'Flutter Demo',

d3xvn

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
 // This widget is the root of your application.
 @override
 Widget build(BuildContext context) {
   return MaterialApp(

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AnimationController controller;
Animation colorAnimation;
Animation sizeAnimation;

@override
void initState() {
 super.initState();
 controller =  AnimationController(vsync: this, duration: Duration(seconds: 2));
 colorAnimation = ColorTween(begin: Colors.blue, end: Colors.yellow).animate(controller);
 sizeAnimation = Tween<double>(begin: 100.0, end: 200.0).animate(controller);

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@override
Widget build(BuildContext context) {
 return Scaffold(
   appBar: AppBar(
     title: Text("Animation Demo"),
   ),
   body: Center(
     child: Container(
       height: sizeAnimation.value,
       width: sizeAnimation.value,

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// In initState
controller.addListener(() {
 setState(() {});
});

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colorAnimation = ColorTween(begin: Colors.blue, end: Colors.yellow).animate(CurvedAnimation(parent: controller, curve: Curves.bounceOut));