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/OpenJDK 21

Class BasicSliderUI.TrackListener

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

Modifier and Type Field Description
protected int currentMouseX
Current mouse x.
protected int currentMouseY
Current mouse y.
protected int offset
The offset

Constructor Summary

Constructor Description
TrackListener()
Constructs a 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 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.
void mouseReleased(MouseEvent e)
Invoked when a mouse button has been released on a component.
boolean shouldScroll(int direction)
Returns if scrolling should occur

Methods declared in class java.awt.event.MouseAdapter

mouseClicked, mouseEntered, mouseExited, mouseMoved, mouseReleased, 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

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()
Constructs a TrackListener.

Method Details

mouseReleased

public void mouseReleased(MouseEvent e)
Invoked when a mouse button has been released on a component.
Parameters:
e - the event to be processed

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

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

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/plaf/basic/BasicSliderUI.TrackListener.html