BasicSliderUI.TrackListener (Java SE 14 & JDK 14)

java.lang.Object

java.awt.event.MouseAdapter

javax.swing.event.MouseInputAdapter

javax.swing.plaf.basic.BasicSliderUI.TrackListener

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

Enclosing class:: BasicSliderUI

public class BasicSliderUI.TrackListener
extends MouseInputAdapter

Track mouse movements. This class should be treated as a "protected" inner class. Instantiate it only within subclasses of Foo.

Field Summary

Fields

Modifier and Type Field Description

protected int currentMouseX
Current mouse x.

protected int currentMouseY
Current mouse y.

protected int offset
The offset
Constructor Summary

Constructors

Constructor Description

TrackListener()

Method Summary

Modifier and Type	Method	Description
`void`	`mouseDragged(MouseEvent e)`	Set the models value to the position of the top/left of the thumb relative to the origin of the track.
`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.
`boolean`	`shouldScroll(int direction)`	Returns if scrolling should occur

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, mouseExited, 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.
- currentMouseY
  
  protected transient int currentMouseY
  
  Current mouse y.
Constructor Details
- TrackListener
  
  public 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.
  
  Parameters:
  
  e - the event to be processed
- shouldScroll
  
  public boolean shouldScroll(int direction)
  
  Returns if scrolling should occur
  
  Parameters:
  
  direction - the direction.
  
  Returns:
  
  if scrolling should occur
- mouseDragged
  
  public void mouseDragged(MouseEvent e)
  
  Set the models value to the position of the top/left of the thumb 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