Configurando KeyListeners usando el MVC en java
Estoy tratando de hacerme una calculadora en Java. Pensé que sería mejor implementar el diseño MVC (controlador de vista de modelo) para mi código. Tengo algunos de los conceptos básicos funcionando, la calculadora realmente funciona, el problema es que no puedo averiguar dónde me está yendo mal con la implementación de la escucha de teclas. En este momento tengo la capacidad de hacer clic en los botones con el detector de acciones y actualizar el campo con un valor numérico y los botones para agregar, restar, multiplicar, dividir y también para borrar. Así que en realidad lo único que tengo en mente en este momento es tratar de permitirle al usuario (a mí mismo) la opción de usar el teclado numérico en el teclado para agregar valores al campo, de todos modos aquí está mi código.
Esta la vista
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));
}
}
este es el 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;
}
}
y este es el 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");
}
}
}
}
el tl; dr de esto es, no puedo hacer que keyListener funcione correctamente, he intentado asignar keyListener al campo, panel1, panel2 y esto. por separado La asistencia es apreciada como siempre.
~ ACTUALIZACIÓN ~ Decidí darle una oportunidad a GitHub y acabo de poner mi código. Espero que haga que mi código sea más fácil de entender o incluso se pueda bifurcar para que una persona pueda jugar con él.https://github.com/niroshido/TestCalculator/tree/master/Calculator