JAVA : How to scroll the horizontal scrollbar by (shift + mouse wheel)

วิธี scroll horizontal scrollbar ด้วยการ กด shift + mouse wheel

view plainprint?

1. // create mouse wheel listener and implement follow below...  
2. @Override  
3. public void mouseWheelMoved(MouseWheelEvent e) {  
4.     if ((e.getModifiers() & java.awt.event.InputEvent.SHIFT_MASK)  
5.             == java.awt.event.InputEvent.SHIFT_MASK) {  
6.         if (scrollPane.getHorizontalScrollBar().isShowing()) {  
7.           JViewport viewport = scrollPane.getViewport();  
8.           Point viewPosition = viewport.getViewPosition();  
9.           if (e.getWheelRotation() < 0) { // wheel up -  
10.              viewPosition.x -= scrollPane.getHorizontalScrollBar()  
11.                     .getBlockIncrement() * 15; // adjust up to you!  
12.           } else { // wheel down +  
13.              viewPosition.x += scrollPane.getHorizontalScrollBar()  
14.                     .getBlockIncrement() * 15; // adjust up to you!  
15.           }  
16.           // X axis only  
17.           if (viewPosition.x > viewport.getView().getWidth() - viewport.getWidth()) {  
18.               viewPosition.x = viewport.getView().getWidth() - viewport.getWidth();  
19.           }  
20.           if (viewPosition.x < 0) {  
21.               viewPosition.x = 0;  
22.           }  
23.           viewport.setViewPosition(viewPosition);  
24.         }  
25.     } else { // dispatchEvent of scrollpane  
26.         scrollPane.dispatchEvent(e); // scroll vertical normaly...  
27.     }  
28. }  

// create mouse wheel listener and implement follow below...
@Override
public void mouseWheelMoved(MouseWheelEvent e) {
    if ((e.getModifiers() & java.awt.event.InputEvent.SHIFT_MASK)
            == java.awt.event.InputEvent.SHIFT_MASK) {
        if (scrollPane.getHorizontalScrollBar().isShowing()) {
          JViewport viewport = scrollPane.getViewport();
          Point viewPosition = viewport.getViewPosition();
          if (e.getWheelRotation() < 0) { // wheel up -
             viewPosition.x -= scrollPane.getHorizontalScrollBar()
                    .getBlockIncrement() * 15; // adjust up to you!
          } else { // wheel down +
             viewPosition.x += scrollPane.getHorizontalScrollBar()
                    .getBlockIncrement() * 15; // adjust up to you!
          }
          // X axis only
          if (viewPosition.x > viewport.getView().getWidth() - viewport.getWidth()) {
              viewPosition.x = viewport.getView().getWidth() - viewport.getWidth();
          }
          if (viewPosition.x < 0) {
              viewPosition.x = 0;
          }
          viewport.setViewPosition(viewPosition);
        }
    } else { // dispatchEvent of scrollpane
        scrollPane.dispatchEvent(e); // scroll vertical normaly...
    }
}