# Class BasicScrollBarUI.ScrollListener

java.lang.Object
javax.swing.plaf.basic.BasicScrollBarUI.ScrollListener

All Implemented Interfaces:
  `ActionListener, EventListener`

Enclosing class:
  `BasicScrollBarUI`

protected class BasicScrollBarUI.ScrollListener extends Object implements ActionListener
Listener for scrolling events initiated in the `ScrollPane`.

## Constructor Summary

Constructors
Constructor
Description
`ScrollListener()`
Constructs a `ScrollListener`.
`ScrollListener(int dir, boolean block)`
Constructs a `ScrollListener`.

## Method Summary

Modifier and Type
Method
Description
`void`
`actionPerformed(ActionEvent e)`
Invoked when an action occurs.
`void`
`setDirection(int direction)`
Sets the direction.
`void`
`setScrollByBlock(boolean block)`
Sets the scrolling by block

### Methods declared in class Object

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

## Constructor Details

### ScrollListener

public ScrollListener()
Constructs a `ScrollListener`.

### ScrollListener

public ScrollListener(int dir, boolean block)
Constructs a `ScrollListener`.

Parameters:
  `dir` - direction
  `block` - use block increment

## Method Details

### setDirection

public void setDirection(int direction)
Sets the direction.

Parameters:
  `direction` - the new direction

### setScrollByBlock

public void setScrollByBlock(boolean block)
Sets the scrolling by block

Parameters:
  `block` - whether or not to scroll by block

### actionPerformed

public void actionPerformed(ActionEvent e)
Invoked when an action occurs.

Specified by:
  `actionPerformed` in interface `ActionListener`
Parameters:
  `e` - the event to be processed