Configurando KeyListeners usando o MVC em java
Estou tentando me tornar uma calculadora em Java. Achei que seria melhor implementar o design MVC (model view controller) para o meu código. Eu tenho algumas noções básicas funcionando, a calculadora realmente funciona, o problema é que não consigo descobrir onde estou errado com a implementação de ouvir teclas. No momento, tenho a capacidade de clicar nos botões usando o ouvinte de ação e atualizar o campo com um valor numérico e os botões para adicionar, subtrair, multiplicar, dividir e também limpar. Então, realmente, a única coisa em minha mente no momento é tentar permitir ao usuário (eu) a opção de usar o teclado numérico no teclado para acrescentar valores ao campo. De qualquer forma, aqui está o meu código.
Essa é a visão
package Calculator;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionListener;
import java.awt.event.KeyListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class CalcFrame extends JFrame{
private Dimension d = new Dimension(300,300);
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JButton equals = new JButton("=");
JButton addBtn = new JButton("+");
JButton subtractBtn = new JButton("-");
JButton multiplyBtn = new JButton("*");
JButton divideBtn = new JButton("/");
JTextArea field = new JTextArea(1,20);
JButton numBtn[] = new JButton[11];
String numTxt[] = {"0","1","2","3","4","5","6","7","8","9","C"};
Color newColor = new Color(10,70,40);
int x = 50, y = 0;
public CalcFrame(){
this.setSize(d);
this.setResizable(false);
// frame.setVisible(true);
this.setTitle("Marks Calculator");
this.setIconImage(new ImageIcon(this.getClass().getResource("emblem.png")).getImage());
for(int i = 0; i < numBtn.length; i++){
numBtn[i] = new JButton(numTxt[i]);
numBtn[i].setSize(50, 30);
}
for(int i = 0; i <numBtn.length; i++){
numBtn[0].setLocation(10,180);
numBtn[1].setLocation(10,140);
numBtn[2].setLocation(65,140);
numBtn[3].setLocation(120,140);
numBtn[4].setLocation(175,140);
numBtn[5].setLocation(10,100);
numBtn[6].setLocation(65,100);
numBtn[7].setLocation(120,100);
numBtn[8].setLocation(175,100);
numBtn[9].setLocation(10,60);
numBtn[10].setLocation(175,20);
panel2.add(numBtn[i]);
, }
field.setLocation(10, 10);
field.setSize(280,30);
field.setEditable(false);
field.setFocusable(true);
panel1.setSize(300, 50);
panel1.setLayout(null);
this.add(panel1);
panel2.setSize(300, 250);
panel2.setBackground(newColor);
panel2.setLocation(0, 51);
panel2.setLayout(null);
this.add(panel2);
equals.setLocation(230,180);
equals.setSize(50, 30);
panel2.add(equals);
addBtn.setLocation(230, 140);
addBtn.setSize(50,30);
panel2.add(addBtn);
subtractBtn.setLocation(230, 100);
subtractBtn.setSize(50,30);
panel2.add(subtractBtn);
multiplyBtn.setLocation(230, 60);
multiplyBtn.setSize(50,30);
panel2.add(multiplyBtn);
divideBtn.setLocation(230, 20);
divideBtn.setSize(50,30);
panel2.add(divideBtn);
panel1.add(field);
this.setLocationRelativeTo(rootPane);
this.setLayout(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void addKeyL(KeyListener keyp){
addKeyListener(keyp);
}
public void addListener(ActionListener listener){
addBtn.addActionListener(listener);
subtractBtn.addActionListener(listener);
equals.addActionListener(listener);
multiplyBtn.addActionListener(listener);
divideBtn.addActionListener(listener);
for(int i = 0; i < numBtn.length; i++){
numBtn[i].addActionListener(listener);
}
}
public int getFieldText(){
return Integer.parseInt(field.getText());
}
public void setFieldText(){
field.setText("");
}
public void setAnswer(int solution){
field.setText(Integer.toString(solution));
}
}
esse é o modelo
package Calculator;
public class Calculations {
private int total;
public void addNumbers(int a, int b){
total = a + b;
}
public void subtractNumbers(int a, int b){
total = a - b;
}
public void multiplyNumbers(int a, int b){
total = a * b;
}
public void divideNumbers(int a, int b){
total = a / b;
}
public int getTotal(){
return total;
}
}
e este é o controlador
package Calculator;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class KeyEvents{
private boolean isAdd = false;
private boolean isSubtract = false;
private boolean isDivide = false;
private boolean isMultiply = false;
private CalcFrame view = new CalcFrame();
private Calculations model = new Calculations();
int a = 0, b = 0, answer;
int counter = 0;
public KeyEvents(CalcFrame view, Calculations model){
this.view = view;
this.model = model;
this.view.addListener(new CalcListener());
this.view.addKeyL(new CalcListener());
}
class CalcListener implements ActionListener, KeyListener{
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource().equals(view.addBtn)){
a = view.getFieldText();
view.field.setText("");
isAdd = true;
isSubtract = false;
isDivide = false;
isMultiply = false;
}
if(e.getSource().equals(view.numBtn[0])){
view.field.append("0");
}
if(e.getSource().equals(view.numBtn[1])){
view.field.append("1");
}
if(e.getSource().equals(view.numBtn[2])){
view.field.append("2");
}
if(e.getSource().equals(view.numBtn[3])){
view.field.append("3");
}
if(e.getSource().equals(view.numBtn[4])){
view.field.append("4");
}
if(e.getSource().equals(view.numBtn[5])){
view.field.append("5");
}
if(e.getSource().equals(view.numBtn[6])){
view.field.append("6");;
}
if(e.getSource().equals(view.numBtn[7])){
view.field.append("7");
}
if(e.getSource().equals(view.numBtn[8])){
view.field.append("8");
}
if(e.getSource().equals(view.numBtn[9])){
view.field.append("9");
}
if(e.getSource().equals(view.numBtn[10])){
view.field.setText("");
}
if(e.getSource().equals(view.subtractBtn)){
a = view.getFieldText();
view.field.setText("");
isAdd = false;
isSubtract = true;
isDivide = false;
isMultiply = false;
}
if(e.getSource().equals(view.multiplyBtn)){
a = view.getFieldText();
view.field.setText("");
isAdd = false;
isSubtract = false;
isDivide = false;
isMultiply = true;
}
if(e.getSource().equals(view.divideBtn)){
a = view.getFieldText();
view.field.setText("");
isAdd = false;
isSubtract = false;
isDivide = true;
isMultiply = false;
}
if(e.getSource().equals(view.equals)){
b = view.getFieldText();
if(isAdd == true){
view.setFieldText();
model.addNumbers(a, b);
view.setAnswer(model.getTotal());
}
if(isSubtract == true){
view.setFieldText();
model.subtractNumbers(a, b);
view.setAnswer(model.getTotal());
}
if(isMultiply == true){
view.setFieldText();
model.multiplyNumbers(a, b);
view.setAnswer(model.getTotal());
}
if(isDivide == true){
view.setFieldText();
model.divideNumbers(a, b);
view.setAnswer(model.getTotal());
}
}
}
@Override
public void keyTyped(KeyEvent e) {
if(e.getSource().equals(KeyEvent.VK_0)){
System.out.println("sjkdhlkj");
}
if(e.getSource().equals(KeyEvent.VK_1)){
view.field.append("1");
}
if(e.getSource().equals(KeyEvent.VK_2)){
view.field.append("2");
}
if(e.getSource().equals(KeyEvent.VK_3)){
view.field.append("3");
}
if(e.getSource().equals(KeyEvent.VK_4)){
view.field.append("4");
}
if(e.getSource().equals(KeyEvent.VK_5)){
view.field.append("5");
}
if(e.getSource().equals(KeyEvent.VK_6)){
view.field.append("6");
}
if(e.getSource().equals(KeyEvent.VK_7)){
view.field.append("7");
}
if(e.getSource().equals(KeyEvent.VK_8)){
view.field.append("8");
}
if(e.getSource().equals(KeyEvent.VK_9)){
view.field.append("9");
}
}
@Override
public void keyPressed(KeyEvent e) {
if(e.getSource().equals(KeyEvent.VK_0)){
System.out.println("sjkdhlkj");
}
if(e.getSource().equals(KeyEvent.VK_1)){
view.field.append("1");
}
if(e.getSource().equals(KeyEvent.VK_2)){
view.field.append("2");
}
if(e.getSource().equals(KeyEvent.VK_3)){
view.field.append("3");
}
if(e.getSource().equals(KeyEvent.VK_4)){
view.field.append("4");
}
if(e.getSource().equals(KeyEvent.VK_5)){
view.field.append("5");
}
if(e.getSource().equals(KeyEvent.VK_6)){
view.field.append("6");
}
if(e.getSource().equals(KeyEvent.VK_7)){
view.field.append("7");
}
if(e.getSource().equals(KeyEvent.VK_8)){
view.field.append("8");
}
if(e.getSource().equals(KeyEvent.VK_9)){
view.field.append("9");
}
}
@Override
public void keyReleased(KeyEvent e) {
if(e.getSource().equals(KeyEvent.VK_0)){
System.out.println("sjkdhlkj");
}
if(e.getSource().equals(KeyEvent.VK_1)){
view.field.append("1");
}
if(e.getSource().equals(KeyEvent.VK_2)){
view.field.append("2");
}
if(e.getSource().equals(KeyEvent.VK_3)){
view.field.append("3");
}
if(e.getSource().equals(KeyEvent.VK_4)){
view.field.append("4");
}
if(e.getSource().equals(KeyEvent.VK_5)){
view.field.append("5");
}
if(e.getSource().equals(KeyEvent.VK_6)){
view.field.append("6");
}
if(e.getSource().equals(KeyEvent.VK_7)){
view.field.append("7");
}
if(e.getSource().equals(KeyEvent.VK_8)){
view.field.append("8");
}
if(e.getSource().equals(KeyEvent.VK_9)){
view.field.append("9");
}
}
}
}
o tl; dr disto é, não consigo fazer com que o keyListener funcione corretamente, tentei atribuir o keyListener ao campo, panel1, panel2 e isso. separadamente. A assistência é apreciada como sempre.
~ UPDATE ~ Decidi experimentar o GitHub e acabei de colocar meu código nele. Espero que isso facilite o entendimento do meu código ou até mesmo seja possível utilizá-lo, para que uma pessoa possa mexer com ele.https://github.com/niroshido/TestCalculator/tree/master/Calculator