Gui

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class Gui {
    public static void main(String[] args) {
        JFrame win = new MainWin();
        win.setVisible(true);
    }
}

class MainWin extends JFrame implements ActionListener, FocusListener {
    private Container c = new Container();
    private PaintPanel painting = new PaintPanel();
    private JPanel controls = new JPanel();
    private String[] colorsLabel = {"red", "blue", "green", "yellow"};
    private Color[] colors = {Color.RED, Color.BLUE, Color.GREEN, Color.YELLOW};
    private JComboBox<String> combo = new JComboBox<String>(colorsLabel);
    private JLabel label = new JLabel("DIMEMSIONS");
    private JTextField width = new JTextField(3);
    private JTextField height = new JTextField(3);
    private int w;
    private int h;
    private JCheckBox ovale = new JCheckBox("Ovale");
    private JCheckBox rectangle = new JCheckBox("Rectangle");

    public MainWin() {
        setTitle("FIGURES");
        setSize(400, 250);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        c = getContentPane();
        c.setLayout(new BorderLayout());
        c.add(painting);
        c.add(controls, "South");
        combo.addActionListener(this);
        width.setText("400");
        width.addActionListener(this);
        width.addFocusListener(this);
        height.setText("250");
        height.addActionListener(this);
        height.addFocusListener(this);
        ovale.addActionListener(this);
        rectangle.addActionListener(this);
        controls.add(combo);
        controls.add(label);
        controls.add(width);
        controls.add(height);
        controls.add(ovale);
        controls.add(rectangle);

    }

    public void actionPerformed(ActionEvent ev) {
        Object source = ev.getSource();
        if (source == combo) {
            for (int i = 0; i < colors.length; i++) {
                if (combo.getSelectedItem() == colorsLabel[i])
                    painting.setBackground(colors[i]);
            }
        }
        if  (source == width || source == height)
            setPaintingSize();
        if (source == ovale) {
            painting.setOvale(ovale.isSelected());
            painting.repaint();
        }
        if (source == rectangle) {
            painting.setRectangle(rectangle.isSelected());
            painting.repaint();
        }
    }

    public void focusGained(FocusEvent ev) {}

    public void focusLost(FocusEvent ev) {
        setPaintingSize();
    }

    private void setPaintingSize() {
        w = Integer.parseInt(width.getText());
        h = Integer.parseInt(height.getText());
        painting.repaint();
    }

    class PaintPanel extends JPanel {
        private boolean ovale = false;
        private boolean rectangle = false;

        public void paintComponent(Graphics g) {
            super.paintComponent(g);
            if (ovale) g.drawOval(80, 20, w, h);
            if (rectangle) g.drawRect(80, 20, w, h);
        }

        public void setOvale(boolean state) {
            ovale = state;
        }

        public void setRectangle(boolean state) {
            rectangle = state;
        }
    }
}