꿈꾸는 시스템 디자이너

import 'package:flutter/material.dart'; ContainerWidgetState pageState; class ContainerWidget extends StatefulWidget { @override ContainerWidgetState createState() { pageState = ContainerWidgetState(); return pageState; } } class ContainerWidgetState extends State { double _height = 100; double _width = 100; double _padding = 1; double _margin = 1; double _border = 1; Color _bgColor = Colors.red..