Question

How to code to crop and capture image by mousepress. using Java

Answer 1

Please find the Java code to crop and capture images by mouse press

1. CropImage.java

/**

* @author Gopal Malaker

* @version 1.0

* @since 2018-04-02

*

*/

import java.awt.Graphics;

import java.awt.Rectangle;

import java.awt.Robot;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionListener;

import java.awt.image.BufferedImage;

import java.io.File;

import javax.imageio.ImageIO;

import javax.swing.JFrame;

public class CropImage extends JFrame implements MouseListener, MouseMotionListener {

private static final long serialVersionUID = -8718753966695793325L;

int drag_status = 0, c1, c2, c3, c4;

public static void main(String args[]) {

new CropImage().start();

}

public void start() {

ImagePanel im = new ImagePanel("C:\\Users\\gmalaker\\Desktop\\Image1.jpeg");

add(im);

setSize(400, 400);

setVisible(true);

addMouseListener(this);

addMouseMotionListener(this);

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

public void draggedScreen() throws Exception {

int w = c1 - c3;

int h = c2 - c4;

w = w * -1;

h = h * -1;

Robot robot = new Robot();

BufferedImage img = robot.createScreenCapture(new Rectangle(c1, c2, w, h));

File save_path = new File("C:\\Users\\gmalaker\\Desktop\\Cropped_Image.jpeg");

ImageIO.write(img, "JPG", save_path);

System.out.println("Cropped image saved successfully.");

}

@Override

public void mouseClicked(MouseEvent arg0) {

}

@Override

public void mouseEntered(MouseEvent arg0) {

}

@Override

public void mouseExited(MouseEvent arg0) {

}

@Override

public void mousePressed(MouseEvent arg0) {

repaint();

c1 = arg0.getX();

c2 = arg0.getY();

}

@Override

public void mouseReleased(MouseEvent arg0) {

repaint();

if (drag_status == 1) {

c3 = arg0.getX();

c4 = arg0.getY();

try {

draggedScreen();

} catch (Exception e) {

e.printStackTrace();

}

}

}

@Override

public void mouseDragged(MouseEvent arg0) {

repaint();

drag_status = 1;

c3 = arg0.getX();

c4 = arg0.getY();

}

@Override

public void mouseMoved(MouseEvent arg0) {

}

public void paint(Graphics g) {

super.paint(g);

int w = c1 - c3;

int h = c2 - c4;

w = w * -1;

h = h * -1;

if (w < 0)

w = w * -1;

g.drawRect(c1, c2, w, h);

}

}

2. ImagePanel.java

/**

* @author Gopal Malaker

* @version 1.0

* @since 2018-04-02

*

*/

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Image;

import javax.swing.ImageIcon;

import javax.swing.JPanel;

public class ImagePanel extends JPanel {

private static final long serialVersionUID = 185260570543109853L;

private Image img;

public ImagePanel(String img) {

this(new ImageIcon(img).getImage());

}

public ImagePanel(Image img) {

this.img = img;

Dimension size = new Dimension(img.getWidth(null), img.getHeight(null));

setPreferredSize(size);

setMinimumSize(size);

setMaximumSize(size);

setSize(size);

setLayout(null);

setVisible(true);

}

public void paintComponent(Graphics g) {

g.drawImage(img, 0, 0, null);

}

}

The Output is attached below:-

Original Image Frame:-

After Cropping and Capturing Image, we get:-

Please let me know in case of any clarifications required. Thanks!