Java Swing enlarge image

Enlarge images in java with mouse clicked on image, and return to previous state when clicked on blank space. Maybe there is some more elegant solution, but I did this with java swing timer.

ImageEnlarge class:

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import java.awt.Graphics; import java.awt.Image; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.ImageIcon; import javax.swing.JPanel; import javax.swing.Timer; /** * * @author Anak1n */ public class ImageEnlarge extends JPanel implements ActionListener, MouseListener { private ImageIcon imageIcon; private Image image; private int width; private int heigth; private int imageHeigth; private int imageWidth; boolean mouseClickedInImageArea = false; Rectangle boundsOfImage; public ImageEnlarge() { imageHeigth = 174; imageWidth = 170; heigth = (600 - imageHeigth) / 2; width = (600 - imageWidth) / 2; imageIcon = new ImageIcon("images/one.jpg"); image = imageIcon.getImage(); boundsOfImage = new Rectangle(width, heigth, imageWidth, imageHeigth); addMouseListener(this); Timer timer = new Timer(5, this); timer.start(); } public void paintComponent(Graphics g) { super.paintComponent(g); g.drawImage(image, heigth, width, imageWidth, imageHeigth, this); } @Override public void actionPerformed(ActionEvent arg0) { if (mouseClickedInImageArea) { if (imageHeigth < 494) { ++imageHeigth; heigth = (600 - imageHeigth) / 2; } if (imageWidth < 450) { ++imageWidth; width = (600 - imageWidth) / 2; } boundsOfImage = new Rectangle(width, heigth, imageWidth, imageHeigth); repaint(); } else if (!mouseClickedInImageArea ) { if (imageHeigth > 174) { --imageHeigth; heigth = (600 - imageHeigth) / 2; } if (imageWidth > 170) { --imageWidth; width = (600 - imageWidth) / 2; } boundsOfImage = new Rectangle(width, heigth, imageWidth, imageHeigth); repaint(); } } @Override public void mouseClicked(MouseEvent e) { if (boundsOfImage.contains(e.getX(), e.getY())) { mouseClickedInImageArea = true; } else mouseClickedInImageArea = false; } @Override public void mouseEntered(MouseEvent e) { } @Override public void mouseExited(MouseEvent e) { } @Override public void mousePressed(MouseEvent e) { } @Override public void mouseReleased(MouseEvent e) { } }

Main class:

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import javax.swing.JFrame; /** * * @author Anak1n */ public class ImageMain { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setTitle("Image enlarge"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(600, 600); ImageEnlarge enlarge = new ImageEnlarge(); frame.add(enlarge); frame.setVisible(true); } }

If it is too slow and you wish to enlarge image faster you can play with values on lines 63, 67 in ImageEnlarge class, and for restoring to previous state you can change values on lines 76,80, to speed up the process or to slow it, or to change timer value on line 47.

Note: You can create folder images and put in it image named one.jpg or chose path to image. Or you can load images on other ways.

Video: