Demonstrating the MouseWheelListener

import java.awt.Color;
import java.awt.Container;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;

import javax.swing.JFrame;

public class MouseWheelTest extends JFrame {
  private static final Color colors[] = { Color.BLACK, Color.BLUE,
      Color.CYAN, Color.DARK_GRAY, Color.GRAY, Color.GREEN,
      Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE, Color.PINK,
      Color.RED, Color.WHITE, Color.YELLOW };

  public MouseWheelTest() {
    super();
    final Container contentPane = getContentPane();

    MouseWheelListener listener = new MouseWheelListener() {
      int colorCounter;

      private static final int UP = 1;

      private static final int DOWN = 2;

      public void mouseWheelMoved(MouseWheelEvent e) {
        int count = e.getWheelRotation();
        int direction = (Math.abs(count) > 0) ? UP : DOWN;
        changeBackground(direction);
      }

      private void changeBackground(int direction) {
        contentPane.setBackground(colors[colorCounter]);

        if (direction == UP) {
          colorCounter++;
        } else {
          --colorCounter;
        }

        if (colorCounter == colors.length) {
          colorCounter = 0;
        } else if (colorCounter < 0) {
          colorCounter = colors.length - 1;
        }
      }
    };
    contentPane.addMouseWheelListener(listener);
  }

  public static void main(String args[]) {
    JFrame frame = new MouseWheelTest();
    frame.setSize(300, 300);
    frame.show();
  }
}

1.	Demonstrating the WindowListener with a WindowAdapter
2.	Demonstrating the ActionListener
3.	Demonstrating the AdjustmentListener
4.	Demonstrating the AncestorListener
5.	Demonstrating the ComponentListener
6.	Demonstrating the ContainerListener
7.	Demonstrating the FocusListener
8.	Demonstrating the HyperlinkListener
9.	Demonstrating the InternalFrameListener
10.	Demonstrating the ItemListener
11.	Demonstrating the KeyListener
12.	Demonstrating the MenuListener
13.	Demonstrating the MouseListener and MouseMotionListener
14.	Demonstrating the PopupMenuListener
15.	Demonstrating the WindowListener
16.	Responding to Keystrokes

Demonstrating the MouseWheelListener : Various Event Listener « Swing JFC « Java

Related examples in the same category