Demonstrating the MouseListener and MouseMotionListener
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
public class MouseTest extends JFrame {
int startX, startY, endX, endY;
Color color = Color.BLACK;
public MouseTest() {
super();
final JPopupMenu pop = new JPopupMenu();
pop.add(new JMenuItem("Cut"));
pop.add(new JMenuItem("Copy"));
pop.add(new JMenuItem("Paste"));
pop.addSeparator();
pop.add(new JMenuItem("Select All"));
pop.setInvoker(this);
MouseListener popup = new MouseListener() {
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
if (e.isPopupTrigger()) {
showPopup(e);
}
}
public void mouseReleased(MouseEvent e) {
if (e.isPopupTrigger()) {
showPopup(e);
}
}
private void showPopup(MouseEvent e) {
pop.show(e.getComponent(), e.getX(), e.getY());
}
};
addMouseListener(popup);
MouseListener drawing1 = new MouseListener() {
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
color = Color.RED;
startX = endX = e.getX();
startY = endY = e.getY();
repaint();
}
public void mouseReleased(MouseEvent e) {
color = Color.BLACK;
repaint();
}
};
addMouseListener(drawing1);
MouseMotionListener drawing2 = new MouseMotionListener() {
public void mouseDragged(MouseEvent e) {
endX = e.getX();
endY = e.getY();
repaint();
}
public void mouseMoved(MouseEvent e) {
}
};
addMouseMotionListener(drawing2);
}
public void paint(Graphics g) {
super.paint(g);
g.setColor(color);
g.drawLine(startX, startY, endX, endY);
}
public static void main(String args[]) {
JFrame frame = new MouseTest();
frame.setSize(300, 300);
frame.show();
}
}
Related examples in the same category
