Painting on Panel - Problem with buttons

[JMateo]

Hello.
The following code is to paint with a brush and erase using the eraser. However, when I click on the button and start painting, the image button also appears in the upper left corner. How to prevent it?

import javax.swing.*;
 
import java.awt.*;
import java.awt.event.*;
 
public class C extends JPanel implements ActionListener,MouseMotionListener 
{
    public int x, y,wybor;
    JButton pedzel,gumka;
    public C()
    {
            ImageIcon ii=new ImageIcon("d:/pedzel.png");
                setLayout(null);
                pedzel=new JButton(ii);
                pedzel.setBounds(400,5,100,54);
                pedzel.addActionListener(this);
                add(pedzel);
 
                ii=new ImageIcon("d:/gumka.png");
                gumka=new JButton(ii);
                gumka.setBounds(400,70,100,100);
                gumka.addActionListener(this);
                add(gumka);
                addMouseMotionListener(this);
    }
 
    public void paintComponent(Graphics g) {
 
        Graphics2D g2d = (Graphics2D) g; 
 if(wybor==1)
 {
        g2d.setColor(Color.BLUE);
        g2d.fillOval(x, y, 20,20);
 }
 if(wybor==2)
 {
        g2d.setColor(getBackground());
        g2d.fillOval(x, y, 20,20);
 }
    }
        public void mouseDragged(MouseEvent e) {
        x = e.getX();
        y = e.getY();
        repaint();        
        }
        public void mouseMoved(MouseEvent e) {        
        }
        public void actionPerformed(ActionEvent e) {
 
                if(e.getSource()==pedzel)
                {
                        wybor=1;
                }
                if(e.getSource()==gumka)
                {
                        wybor=2;
                }
        }
}

My frame

 import javax.swing.JFrame;
import javax.swing.JPanel;
 
 
public class Ramka extends JFrame
{
C j=new C();
        public Ramka()
        {
                add(j);
                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                setVisible(true);
                setSize(600,500);
        }
        public static void main(String[] args) {
                new Ramka();
 
        }
 
}

[Fubarable]

You need to call the super.paintComponent(...) method within your paintComponent method.

[JMateo]

If I do this, I'll lose effect of painting and erasing. When I add super.paintComponent my whole frame will refresh and waht I only paint is an Oval.

[DarrylBurke]

Oh yeah? And what happens if you resize the frame by a few pixels, or iconify (minimize) and restore it?

A suggestion: draw your ellipses (they're not ovals, the method is badly named) to a BufferedImage of the desired painting canvas size and call repaint(). Then paintImage(...) the BufferedImage in a paintComponent(...) override that either paints the entire client area or invokes the super implementation.

db

[JMateo]

It works. Thank you very much:)