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import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
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 java.io.IOException;
public class MonDessin extends JFrame {
private JPanel monPanel;
private int xPressed, xDragged, yPressed, yDragged;
private boolean isActive = false;
public MonDessin() {
this.setTitle("Test");
this.setSize(800, 800);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JPanel container = new JPanel ();
monPanel = new JPanel();
monPanel.setPreferredSize(new Dimension(150, 75));
monPanel.setBackground(Color.WHITE);
monPanel.addMouseMotionListener(
new MouseMotionListener() {
public void mouseDragged(MouseEvent e) {
if (isActive) {
xPressed = xDragged;
yPressed = yDragged;
xDragged = e.getXOnScreen();
yDragged = e.getYOnScreen();
repaint();
}
}
public void mouseMoved(MouseEvent e) {
isActive = true;
}
}
);
monPanel.addMouseListener(
new MouseListener() {
// Invoked when a mouse button has been pressed on a component.
public void mousePressed(MouseEvent e) {
if (isActive) {
xPressed = e.getXOnScreen();
yPressed = e.getYOnScreen();
xDragged = xPressed;
yDragged = yPressed;
repaint();
}
}
//Invoked when the mouse has been clicked on a component.
public void mouseClicked(MouseEvent e) {
}
//Invoked when a mouse button has been released on a component.
public void mouseReleased(MouseEvent e) {
}
//Invoked when the mouse enters a component.
public void mouseEntered(MouseEvent e) {
isActive = true;
xDragged = e.getXOnScreen();
yDragged = e.getYOnScreen();
}
//Invoked when the mouse exits a component.
public void mouseExited(MouseEvent e) {
isActive = false;
}
}
);
container.add(monPanel);
JButton b_enregistrer = new JButton("Enregistrer");
b_enregistrer.setPreferredSize(new Dimension(200, 55));
b_enregistrer.addActionListener(
f -> {
try {
BufferedImage bimage = new BufferedImage(150, 75, BufferedImage.TYPE_INT_RGB);
monPanel.paint(bimage.getGraphics());
Graphics g = bimage.getGraphics();
g.setColor(monPanel.getForeground());
g.setFont(monPanel.getFont());
ImageIO.write(bimage, "JPEG", new File("MonDessin.jpg"));
} catch (IOException ex) {
ex.printStackTrace();
}
}
);
container.add(b_enregistrer);
this.setContentPane(container);
}
@Override
public void paint(Graphics g) {
int offsetX = 1;
int offsetY = 25;
if (!isActive) {
super.paint(g);
} else {
g.drawLine(xPressed - offsetX, yPressed - offsetY, xDragged - offsetX, yDragged - offsetY);
}
}
} |
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