Class BasicScrollBarUI.TrackListener

All Implemented Interfaces:
MouseListener, MouseMotionListener, MouseWheelListener, EventListener
Enclosing class:
BasicScrollBarUI
protected class BasicScrollBarUI.TrackListener
extends MouseAdapter
implements MouseMotionListener

Track mouse drags.

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

Constructors

Modifier Constructor Description
protected TrackListener()

Methods

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

Fields

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

Constructors

TrackListener

protected TrackListener()

Methods

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

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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/plaf/basic/BasicScrollBarUI.TrackListener.html