Main

import 'dart:math';
import 'dart:ui';
import 'package:flutter/material.dart';

List<Widget> _list = new List<Widget>();
final projectName = TextEditingController();
final double sizeOfTile = window.physicalSize.width / 3 - 90;
final List<Color> colors = [Color(0xFF7DE9FF), Color(0xFFA07DFF),
                            Color(0xFFFD7DFF), Color(0xFFFA5F67),
                            Color(0xFFE6925E), Color(0xFFF5DE5D),
                            Color(0xFF6EF54C), Color(0xFF43FA9C)];
void main() {
  runApp(
      new MaterialApp(
          debugShowCheckedModeBanner: false,
          initialRoute: '/',
          routes: {
            '/': (BuildContext context) => MainMenu(),
            '/counter': (BuildContext context) => Counter()
          },
      )
  );
}

class MainMenu extends StatefulWidget{
  _MainMenu createState() => _MainMenu();
}

class _MainMenu extends State<MainMenu> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(

      backgroundColor: Color(0xFFE8F8FF),
      appBar: new AppBar(
        title: new Text("Мои проекты"),
      ),
      body: GridView.count(
          crossAxisCount: 2,
          children: _list.toList()
      ),
      bottomNavigationBar: new BottomNavigationBar(items: [
        new BottomNavigationBarItem(
            icon: new Icon(Icons.home),
            title: new Text("Главная")
        ),
        new BottomNavigationBarItem(
            icon: new Icon(Icons.stars),
            title: new Text("Схемы")
        ),
        new BottomNavigationBarItem(
            icon: new Icon(Icons.help_outline),
            title: new Text("Советы")
        )
      ]),
      floatingActionButton: new FloatingActionButton(
        onPressed: addProject,
        backgroundColor: Colors.blueAccent,
        child: new Icon(Icons.add),
      ),
    );
  }
//добавляет проект в меню
  void addProject() {
      showDialog(
          context: context,
          builder: (context){
            return AlertDialog(
              title: Text("Новый проект"),
              content: TextField(
                controller: projectName,
              ),
              actions: <Widget>[
                new FlatButton(
                    child: Text("ОТМЕНА"),
                    onPressed: (){
                      projectName.text = "";
                      Navigator.of(context).pop();
                    }
                ),
                new FlatButton(
                  child: Text("ОК"),
                  onPressed: (){
                    if(projectName.text.compareTo("") != 0)
                      addElementToMenu();	//непосредственно создание кнопки и добавление в _list
                    projectName.text = "";
                    Navigator.of(context).pop();
                  },
                )
              ],
            );
          }
      );
  }
//непосредственно создание кнопки и добавление в _list
  void addElementToMenu(){
    setState(() {
      final GlobalKey key_text = new GlobalKey();
      _list.add(
          Center(
              child: Container(
                width: sizeOfTile,
                height: sizeOfTile,
                child: ButtonTheme(
                  height: sizeOfTile,
                  buttonColor: colors[new Random.secure().nextInt(8)],
                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(30)),
                  child: RaisedButton(
                    key: new GlobalKey(),
                    onPressed: () {
                      Navigator.pushNamed(context, '/counter');

                    },
                    child: new Text(
                        projectName.text.toUpperCase(),
                        style: new TextStyle(
                          fontFamily: 'projectName1',
                          fontSize: getFont(projectName.text),
                          fontWeight: FontWeight.bold,
                          height: 1.2
                        ),
                        textAlign: TextAlign.center,
                        key: key_text,
                    ),
                  ),

                ),
              )
          )
      );
    });
  }

  double getFont(String text){
    double fontSize = 34;
    int max = 0;
    List arr = text.split(" ");
    for (String a in arr)
      if( a.length > max)
        max = a.length;
    if (max > 7)
      fontSize = 37 - max * 1.4;
    return fontSize;
  }
}

class Counter extends StatefulWidget{
  _Counter createState() => _Counter();
}

//новое окно в котором я хочу присвоить имя заголовку из текста кнопки
class _Counter extends State{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFFE8F8FF),
      appBar: new AppBar(
        title: new Text(projectName.text),
      ),
      body: Center(),
    );
  }
}