在Java中使用帶有JSpinner的鼠標滾輪

Question

我想用我的鼠標滾輪來遞增和遞減JSpinner。這可能嗎？

Answer 1

import javax.swing.*; 
import java.awt.event.*; 
public class TestSpinner extends JFrame implements 
MouseWheelListener 
{ 
    public TestSpinner() 
    { 
    setSize(100, 50); 
    spinner = new JSpinner(); 
    spinner.addMouseWheelListener(this); 
    getContentPane().add(spinner, "Center"); 
    } 
    public void mouseWheelMoved(MouseWheelEvent e) 
    { 
    spinner.setValue(new Integer(
((Integer)spinner.getValue()).intValue() - 
e.getWheelRotation())); 
    } 
    public static void main(String [] args) 
    { 
    TestSpinner t = new TestSpinner(); 
    t.setVisible(true); 
    } 
    private JSpinner spinner; 
} 

出處：http：//www.devx.com/tips/Tip/14880

Answer 2

spinner.addMouseWheelListener(new MouseWheelListener() { 
    public void mouseWheelMoved(MouseWheelEvent mwe) { 
     if (mwe.getScrollType() != MouseWheelEvent.WHEEL_UNIT_SCROLL) { 
      return; 
     } 
     double value = (Double)spinner.getValue(); 
     value -= mwe.getUnitsToScroll(); 
     spinner.setValue(value); 
    } 
}); 

這劈爲我工作。