javax.swing.plaf.basic

Class BasicSliderUI.TrackListener

java.lang.Object

javax.swing.event.MouseInputAdapter

javax.swing.plaf.basic.BasicSliderUI.TrackListener

All Implemented Interfaces:

MouseListener, MouseMotionListener, EventListener, MouseInputListener

Enclosing class:

BasicSliderUI

public class BasicSliderUI.TrackListener
extends MouseInputAdapter

Helper class that listens for mouse events.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	currentMouseX The current X position of the mouse.
protected int	currentMouseY The current Y position of the mouse.
protected int	offset The offset between the current slider value and the cursor's position.

Constructor Summary

Constructors

Constructor and Description
BasicSliderUI.TrackListener()

Method Summary

Methods

Modifier and Type	Method and Description
void	mouseDragged(MouseEvent e) Called when the mouse has been dragged.
void	mouseMoved(MouseEvent e) Called when the mouse has moved over a component but no buttons have been pressed yet.
void	mousePressed(MouseEvent e) Called when the mouse is pressed.
void	mouseReleased(MouseEvent e) Called when the mouse is released.
boolean	shouldScroll(int direction) Indicates whether the thumb should scroll in the given direction.

Methods inherited from class javax.swing.event.MouseInputAdapter

mouseClicked, mouseEntered, mouseExited

Methods inherited from class java.lang.Object

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

Field Detail

currentMouseX

protected int currentMouseX

The current X position of the mouse.

currentMouseY

protected int currentMouseY

The current Y position of the mouse.

offset

protected int offset

The offset between the current slider value and the cursor's position.

Constructor Detail

BasicSliderUI.TrackListener

public BasicSliderUI.TrackListener()

Method Detail

mouseDragged

public void mouseDragged(MouseEvent e)

Called when the mouse has been dragged. This should find the mouse's current position and adjust the value of the JSlider accordingly.

Specified by:

mouseDragged in interface MouseMotionListener

Overrides:

mouseDragged in class MouseInputAdapter

Parameters:

e - A MouseEvent

mouseMoved

public void mouseMoved(MouseEvent e)

Called when the mouse has moved over a component but no buttons have been pressed yet.

Specified by:

mouseMoved in interface MouseMotionListener

Overrides:

mouseMoved in class MouseInputAdapter

Parameters:

e - A MouseEvent

mousePressed

public void mousePressed(MouseEvent e)

Called when the mouse is pressed. When the press occurs on the thumb itself, the JSlider should have its value set to where the mouse was pressed. If the press occurs on the track, then the thumb should move one block towards the direction of the mouse.

Specified by:

mousePressed in interface MouseListener

Overrides:

mousePressed in class MouseInputAdapter

Parameters:

e - A MouseEvent

mouseReleased

public void mouseReleased(MouseEvent e)

Called when the mouse is released. This should stop the timer that scrolls the thumb.

Specified by:

mouseReleased in interface MouseListener

Overrides:

mouseReleased in class MouseInputAdapter

Parameters:

e - A MouseEvent

shouldScroll

public boolean shouldScroll(int direction)

Indicates whether the thumb should scroll in the given direction.

Parameters:

direction - The direction to check.

Returns:

True if the thumb should move in that direction.