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## javax.swing.plaf.basic
Class BasicScrollBarUI.TrackListener

    java.lang.Object
      |
      +--java.awt.event.MouseAdapter
            |
            +--javax.swing.plaf.basic.BasicScrollBarUI.TrackListener

All Implemented Interfaces:
  EventListener, MouseListener, MouseMotionListener

Enclosing class:
  BasicScrollBarUI

protected class BasicScrollBarUI.TrackListener
extends MouseAdapter
implements MouseMotionListener

Track mouse drags.

Field Summary
`protected int` | `currentMouseX`
`protected int` | `currentMouseY`
`protected int` | `offset`

Constructor Summary
`protected` | `BasicScrollBarUI.TrackListener()`

Method Summary
`void` | `mouseDragged(MouseEvent e)` Set the models value to the position of the thumb's top of Vertical scrollbar, or the left/right of Horizontal scrollbar in left-to-right/right-to-left scrollbar relative to the origin of the track.
`void` | `mouseMoved(MouseEvent e)` Invoked when the mouse button has been moved on a component (with no buttons down).
`void` | `mousePressed(MouseEvent e)` If the mouse is pressed above the "thumb" component then reduce the scrollbars value by one page ("page up"), otherwise increase it by one page.
`void` | `mouseReleased(MouseEvent e)` Invoked when a mouse button has been released on a component.

Methods inherited from class java.awt.event.MouseAdapter
`mouseClicked, mouseEntered, mouseExited`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### offset

    protected transient int offset

### currentMouseX

    protected transient int currentMouseX

### currentMouseY

    protected transient int currentMouseY

Constructor Detail

### BasicScrollBarUI.TrackListener

    protected BasicScrollBarUI.TrackListener()

Method Detail

### mouseReleased

    public void mouseReleased(MouseEvent e)

  Description copied from class: `MouseAdapter`
  Invoked when a mouse button has been released on a component.

  Specified by:
    `mouseReleased` in interface `MouseListener`
  Overrides:
    `mouseReleased` in class `MouseAdapter`

### mousePressed

    public void mousePressed(MouseEvent e)

  If the mouse is pressed above the "thumb" component then reduce the scrollbars value by one page ("page up"), otherwise increase it by one page. If there is no thumb then page up if the mouse is in the upper half of the track.

  Specified by:
    `mousePressed` in interface `MouseListener`
  Overrides:
    `mousePressed` in class `MouseAdapter`

### mouseDragged

    public void mouseDragged(MouseEvent e)

  Set the models value to the position of the thumb's top of Vertical scrollbar, or the left/right of Horizontal scrollbar in left-to-right/right-to-left scrollbar relative to the origin of the track.

  Specified by:
    `mouseDragged` in interface `MouseMotionListener`

### mouseMoved

    public void mouseMoved(MouseEvent e)

  Description copied from interface: `MouseMotionListener`
  Invoked when the mouse button has been moved on a component (with no buttons down).

  Specified by:
    `mouseMoved` in interface `MouseMotionListener`

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