PIbd-23_Mochalov_D.V._Locomotive_Hard/FormEntityWithExtraGallery.java

import javax.swing.*;
import java.awt.*;
import java.util.Random;

public class FormEntityWithExtraGallery extends JComponent {
    private DrawningLocomotive _locomotiveFirst;
    private DrawningLocomotive _locomotiveSecond;
    private DrawningLocomotive _locomotiveThird;
    EntityWithExtraCreator<EntityLocomotive, IDrawningExtra> entityWithExtraCreator;

    public FormEntityWithExtraGallery() {
        JFrame formFrame = new JFrame("Gallery");
        formFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        formFrame.setSize(900, 500);
        formFrame.setLocationRelativeTo(null);

        Panel statusPanel = new Panel();
        statusPanel.setBackground(Color.WHITE);
        statusPanel.setLayout(new FlowLayout());
        setLayout(new BorderLayout());
        add(statusPanel, BorderLayout.SOUTH);



        JButton showRandomEntity = new JButton("Create entity from parts");
        showRandomEntity.addActionListener(e -> {

            Random random = new Random();
            if (entityWithExtraCreator == null) {
                entityWithExtraCreator = new EntityWithExtraCreator<EntityLocomotive, IDrawningExtra>(20, 20);
                for (int i = 0; i < 20; i ++) {
                    if (random.nextBoolean()) {
                        entityWithExtraCreator.Insert(new EntityLocomotive(random.nextInt(100), random.nextInt(100),
                                new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255))));
                    }
                    else {
                        entityWithExtraCreator.Insert(new EntityWarmlyLocomotive(random.nextInt(100), random.nextInt(100),
                                new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255)),
                                new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255)),
                                random.nextBoolean(), random.nextBoolean()));
                    }
                }
                for (int i = 0; i < 20; i ++) {
                    int extraRand = random.nextInt(3);
                    switch (extraRand) {
                        case 0:
                            entityWithExtraCreator.Insert(new ExtraWheelsDraw(random.nextInt(3),
                                    new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255))));
                            break;

                        case 1:
                            entityWithExtraCreator.Insert(new ExtraStarWheelDraw(random.nextInt(3),
                                    new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255))));
                            break;

                        case 2:
                            entityWithExtraCreator.Insert(new ExtraRoundWheelDraw(random.nextInt(3),
                                    new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255))));
                            break;
                    }
                }
            }
            _locomotiveFirst = entityWithExtraCreator.getEntityWithExtra();
            _locomotiveFirst.SetPosition(200, 200, formFrame.getWidth(), formFrame.getHeight() - 75);

            _locomotiveSecond = entityWithExtraCreator.getEntityWithExtra();
            _locomotiveSecond.SetPosition(400, 200, formFrame.getWidth(), formFrame.getHeight() - 75);

            _locomotiveThird = entityWithExtraCreator.getEntityWithExtra();
            _locomotiveThird.SetPosition(600, 200, formFrame.getWidth(), formFrame.getHeight() - 75);
            repaint();
        });
        statusPanel.add(showRandomEntity);


        formFrame.getContentPane().add(this);

        formFrame.setVisible(true);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        if (_locomotiveFirst != null) _locomotiveFirst.DrawTransport(g2);
        if (_locomotiveSecond != null) _locomotiveSecond.DrawTransport(g2);
        if (_locomotiveThird != null) _locomotiveThird.DrawTransport(g2);
        super.repaint();
    }
}