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	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 MouseAdapter

mouseClicked, mouseEntered, mouseMoved, mouseReleased, mouseWheelMoved

Modifier and Type	Method	Description
void	mouseClicked(MouseEvent e)	Invoked when the mouse button has been clicked (pressed and released) on a component.
void	mouseEntered(MouseEvent e)	Invoked when the mouse enters a component.
void	mouseMoved(MouseEvent e)	Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.
void	mouseReleased(MouseEvent e)	Invoked when a mouse button has been released on a component.
void	mouseWheelMoved(MouseWheelEvent e)	Invoked when the mouse wheel is rotated.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
int	hashCode()	Answers an integer hash code for the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
String	toString()	Answers a string containing a concise, human-readable description of the receiver.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

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

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