BasicScrollPaneUI.MouseWheelHandler (Java SE 12 & JDK 12 )
Keywords: javax.swing.plaf.basic.BasicScrollPaneUI.MouseWheelHandler class

Module java.desktop
Package javax.swing.plaf.basic

## Class BasicScrollPaneUI.MouseWheelHandler

- java.lang.Object
- - javax.swing.plaf.basic.BasicScrollPaneUI.MouseWheelHandler

- All Implemented Interfaces:
    `MouseWheelListener`, `EventListener`
  Enclosing class:
    BasicScrollPaneUI

      protected class BasicScrollPaneUI.MouseWheelHandler
      extends Object
      implements MouseWheelListener

  MouseWheelHandler is an inner class which implements the MouseWheelListener interface. MouseWheelHandler responds to MouseWheelEvents by scrolling the JScrollPane appropriately. If the scroll pane's `isWheelScrollingEnabled` method returns false, no scrolling occurs.
  Since:
    1.4
  See Also:
    `JScrollPane.isWheelScrollingEnabled()`, `BasicScrollPaneUI.createMouseWheelListener()`, `MouseWheelListener`, `MouseWheelEvent`

- - ### Constructor Summary

    Constructors
    Modifier | Constructor | Description
    --- | --- | ---
    `protected` | `MouseWheelHandler()` |

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `mouseWheelMoved​(MouseWheelEvent e)` | Called when the mouse wheel is rotated while over a JScrollPane.

    - ### Methods declared in class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### MouseWheelHandler

          protected MouseWheelHandler()

  - ### Method Detail

    - #### mouseWheelMoved

          public void mouseWheelMoved​(MouseWheelEvent e)

      Called when the mouse wheel is rotated while over a JScrollPane.
      Specified by:
        `mouseWheelMoved` in interface `MouseWheelListener`
      Parameters:
        `e` - MouseWheelEvent to be handled
      Since:
        1.4
      See Also:
        `MouseWheelEvent`