Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Main extends JPanel {

    String SIGNAL = "Signal";
    private List<JComboBox<ComboColor>> comboList = new ArrayList<>();

    public Main() {
        setLayout(new GridLayout(0, 1));

        DefaultComboBoxModel<ComboColor> cModel = new DefaultComboBoxModel<>(ComboColor.values());
        JComboBox<ComboColor> combo = new JComboBox<>(cModel);
        add(createComboLabelPanel(1, combo));
        comboList.add(combo);

    }

    private JPanel createComboLabelPanel(int index, JComboBox<ComboColor> combo) {
        JPanel panel = new JPanel();
        JLabel label = new JLabel(SIGNAL + " " + index);
        label.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        label.setOpaque(true);
        combo.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent evt) {
                ComboColor cColor = (ComboColor) combo.getSelectedItem();
                label.setBackground(cColor.getColor());
            }
        });

        panel.add(label);
        panel.add(combo);
        return panel;
    }

    public static void main(String[] args) {
        Main mainPanel = new Main();

        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(mainPanel);
        f.pack();
        f.setLocationByPlatform(true);
        f.setVisible(true);

    }
}

enum ComboColor {
    RED("Red", Color.RED), GREEN("Green", Color.GREEN);

    private String text;
    private Color color;

    public String getText() {
        return text;
    }

    public Color getColor() {
        return color;
    }

    private ComboColor(String text, Color color) {
        this.text = text;
        this.color = color;
    }

    @Override
    public String toString() {
        return text;
    }
}