BasicScrollBarUI.TrackListener (Java SE 14 & JDK 14)

java.lang.Object

java.awt.event.MouseAdapter

javax.swing.plaf.basic.BasicScrollBarUI.TrackListener

All Implemented Interfaces:: MouseListener, MouseMotionListener, MouseWheelListener, EventListener

Enclosing class:: BasicScrollBarUI

protected class BasicScrollBarUI.TrackListener
extends MouseAdapter
implements MouseMotionListener

Track mouse drags.

Field Summary

Fields
Modifier and Type	Field	Description
`protected int`	`currentMouseX`	Current mouse x position
`protected int`	`currentMouseY`	Current mouse y position
`protected int`	`offset`	The offset

Constructor Summary

Constructors

Modifier Constructor Description

protected TrackListener()

Method Summary

Modifier and Type	Method	Description
`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`	`mouseExited(MouseEvent e)`	Invoked when the mouse exits the scrollbar.
`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.

Methods declared in class java.awt.event.MouseAdapter

mouseMoved, mouseWheelMoved

Methods declared in class java.lang.Object

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

Methods declared in interface java.awt.event.MouseListener

mouseClicked, mouseEntered, mouseReleased

Methods declared in interface java.awt.event.MouseMotionListener

mouseMoved

Field Details
- offset
  
  protected transient int offset
  
  The offset
- currentMouseX
  
  protected transient int currentMouseX
  
  Current mouse x position
- currentMouseY
  
  protected transient int currentMouseY
  
  Current mouse y position
Constructor Details
- TrackListener
  
  protected TrackListener()
Method Details
- 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
  
  Parameters:
  
  e - the event to be processed
- 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
  
  Overrides:
  
  mouseDragged in class MouseAdapter
  
  Parameters:
  
  e - the event to be processed
- mouseExited
  
  public void mouseExited(MouseEvent e)
  
  Invoked when the mouse exits the scrollbar.
  
  Specified by:
  
  mouseExited in interface MouseListener
  
  Parameters:
  
  e - MouseEvent further describing the event
  
  Since:
  
  1.5