Module java.desktop

Package javax.swing.plaf.basic

Class BasicScrollBarUI.TrackListener

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()	Constructs a 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	mouseMoved(MouseEvent e)	Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.
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

mouseClicked, mouseEntered, mouseMoved, mouseReleased, mouseWheelMoved

Methods declared in class java.lang.Object

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

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()

Constructs a 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

mouseMoved

public void mouseMoved(MouseEvent e)

Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.

Specified by:

mouseMoved in interface MouseMotionListener

Overrides:

mouseMoved 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