Cara Membuat Number Pad di Flutter

Azhar Rivaldi    12/04/2024    Tutorial Flutter    Comment   

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Cara Membuat Number Pad di Flutter

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Berikut ini source code nya:

import 'package:flutter/material.dart';

class NumPad extends StatelessWidget {
  final double buttonSize;
  final Color buttonColor;
  final Color iconColor;
  final TextEditingController controller;
  final Function delete;
  final Function onSubmit;

  const NumPad({
    super.key,
    this.buttonSize = 70,
    this.buttonColor = Colors.indigo,
    this.iconColor = Colors.amber,
    required this.delete,
    required this.onSubmit,
    required this.controller,
  });

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: const EdgeInsets.only(left: 30, right: 30),
      child: Column(
        children: [
          const SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              NumberButton(
                number: 1,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              NumberButton(
                number: 2,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              NumberButton(
                number: 3,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
            ],
          ),
          const SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              NumberButton(
                number: 4,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              NumberButton(
                number: 5,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              NumberButton(
                number: 6,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
            ],
          ),
          const SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              NumberButton(
                number: 7,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              NumberButton(
                number: 8,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              NumberButton(
                number: 9,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
            ],
          ),
          const SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              IconButton(
                onPressed: () => delete(),
                icon: Icon(
                  Icons.backspace,
                  color: iconColor,
                ),
                iconSize: buttonSize,
              ),
              NumberButton(
                number: 0,
                size: buttonSize,
                color: buttonColor,
                controller: controller,
              ),
              IconButton(
                onPressed: () => onSubmit(),
                icon: Icon(
                  Icons.done_rounded,
                  color: iconColor,
                ),
                iconSize: buttonSize,
              ),
            ],
          ),
        ],
      ),
    );
  }
}

class NumberButton extends StatelessWidget {
  final int number;
  final double size;
  final Color color;
  final TextEditingController controller;

  const NumberButton({
    super.key,
    required this.number,
    required this.size,
    required this.color,
    required this.controller,
  });

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: size,
      height: size,
      child: ElevatedButton(
        style: ElevatedButton.styleFrom(
          backgroundColor: color,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(size / 2),
          ),
        ),
        onPressed: () {
          controller.text += number.toString();
        },
        child: Center(
          child: Text(
            number.toString(),
            style: const TextStyle(
                fontWeight: FontWeight.bold,
                color: Colors.white,
                fontSize: 30
            ),
          ),
        ),
      ),
    );
  }
}

Ini untuk Class main.dart nya:

import 'package:flutter/material.dart';

import 'num_pad.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        useMaterial3: false,
        primarySwatch: Colors.green,
      ),
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({super.key});

  @override
  HomePageState createState() => HomePageState();
}

class HomePageState extends State {

  final TextEditingController _myController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Example Num Pad'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Padding(
            padding: const EdgeInsets.all(20),
            child: SizedBox(
              height: 70,
              child: Center(
                  child: TextField(
                    controller: _myController,
                    textAlign: TextAlign.center,
                    showCursor: false,
                    style: const TextStyle(fontSize: 40),
                    keyboardType: TextInputType.none,
                  )
              ),
            ),
          ),
          NumPad(
            buttonSize: 75,
            buttonColor: Colors.purple,
            iconColor: Colors.deepOrange,
            controller: _myController,
            delete: () {
              _myController.text = _myController.text
                  .substring(0, _myController.text.length - 1);
            },
            onSubmit: () {
              debugPrint('Your code: ${_myController.text}');
              showDialog(
                  context: context,
                  builder: (_) => AlertDialog(
                    content: Text(
                      "You code is ${_myController.text}",
                      style: const TextStyle(fontSize: 30),
                    ),
                  )
              );
            },
          ),
        ],
      ),
    );
  }
}

Untuk Output-nya nanti seperti ini:

Hasil Output

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