Graphs_dart/flutter/lib/pages/drawing_page.dart

import 'dart:io';

import 'package:graphs/curve_painter.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:graphs/src/graph.dart';

class DrawingPage extends StatefulWidget {
  const DrawingPage({Key? key}) : super(key: key);

  @override
  State<StatefulWidget> createState() => _DrawingPageState();
}

class _DrawingPageState extends State<DrawingPage> {
  Graphs data = Graphs("Data");

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
      appBar: AppBar(
          title: const Text("Graph",
              style: TextStyle(fontSize: 35, color: Colors.white)),
          toolbarHeight: 110, // Set this height
          flexibleSpace: Container(
            color: Colors.blue,
            child: Column(children: <Widget>[
              /*Row(children: const <Widget>[
              SizedBox(width: 25),
              Text("Graph", style: TextStyle(fontSize: 23, color: Colors.white))
            ]),*/
              const SizedBox(height: 5),
              Container(
                width: MediaQuery.of(context).size.width / 3 + 30,
                height: 40,
                margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
                child: const TextField(
                  textAlign: TextAlign.center,
                  decoration: InputDecoration(
                      contentPadding:
                          EdgeInsets.symmetric(vertical: 10, horizontal: 10),
                      filled: true,
                      fillColor: Colors.white,
                      prefixIcon: Icon(Icons.fiber_manual_record_outlined,
                          color: Colors.black),
                      border: OutlineInputBorder(
                          borderRadius: BorderRadius.all(Radius.circular(40))),
                      hintStyle: TextStyle(color: Colors.black38),
                      hintText: "Input dot number"),
                ),
              ),
              Container(
                width: MediaQuery.of(context).size.width / 3 + 30,
                height: 40,
                margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
                child: const TextField(
                  textAlign: TextAlign.center,
                  decoration: InputDecoration(
                      contentPadding:
                          EdgeInsets.symmetric(vertical: 10, horizontal: 10),
                      filled: true,
                      fillColor: Colors.white,
                      prefixIcon: Icon(Icons.arrow_right_alt_outlined,
                          color: Colors.black),
                      border: OutlineInputBorder(
                          borderRadius: BorderRadius.all(Radius.circular(40))),
                      hintStyle: TextStyle(color: Colors.black38),
                      hintText: "Input path length"),
                ),
              ),
            ]),
          ),
          actions: [
            Column(
              children: [
                addVerticalSpace(10),
                createButton("\nAdd dot\n"),
                addVerticalSpace(3),
                createButton("\nDel dot \n"),
              ],
            ),
            IconButton(
              onPressed: () => closeApp(),
              icon: const Icon(Icons.close),
              iconSize: 50,
            ),
          ]),
      body: CustomPaint(
        painter: CurvePainter(),
        child: const Center(),
      ),
    ));
  }

  ElevatedButton createButton(String txt) {
    return ElevatedButton(
      style: TextButton.styleFrom(
        primary: Colors.blue,
      ),
      onPressed: null,
      child: Text(txt,
          style: const TextStyle(
            fontSize: 15,
            color: Colors.white,
            height: 1,
          )),
    );
  }

  SizedBox addVerticalSpace(double h) {
    return SizedBox(height: h);
  }

  void closeApp() {
    if (Platform.isWindows) {
      exit(0);
    }
    SystemChannels.platform.invokeMethod('SystemNavigator.pop');
  }
}

class _Buttons extends StatelessWidget {
  const _Buttons({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container();
  }
}