import javax.swing.*; import java.awt.event.*; import java.awt.*; public class Souris implements MouseWheelListener { Paintvolume draw; public Souris(Paintvolume draw) { this.draw = draw; } public void mouseWheelMoved(MouseWheelEvent e) { if (e.getWheelRotation() > 0) { draw.downVolume(); } else { draw.upVolume(); } } }