OperacionesPanel.java

package es.uv.eu.calculadora.vista;

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;

/**
 *
 * @author
 */
class OperacionesPanel extends JPanel {

    private JButton bmas,bmenos,bmult,bdiv,bresult;

    public OperacionesPanel(){
        //setBackground(CalculadoraVista.BACKGROUND);

        bmas=new JButton("+");
        bmenos=new JButton("-");
        bmult=new JButton("*");
        bdiv=new JButton("/");
        bresult=new JButton("=");

        bmas.setActionCommand("+");
        bmenos.setActionCommand("-");
        bmult.setActionCommand("*");
        bdiv.setActionCommand("/");
        bresult.setActionCommand("=");

        this.setLayout(new GridLayout(5,1));
        this.setBorder(new EmptyBorder(4, 4, 4, 4));
        //this.setBorder(new LineBorder(Color.BLUE));
        this.add(bmas);
        this.add(bmenos);
        this.add(bmult);
        this.add(bdiv);
        this.add(bresult);
    }

    public void addOpListener(ActionListener l) {
        this.bmas.addActionListener(l);
        this.bmenos.addActionListener(l);
        this.bmult.addActionListener(l);
        this.bdiv.addActionListener(l);
        this.bresult.addActionListener(l);
    }

}