Class ListUI

java.lang.Object

javax.swing.plaf.ComponentUI

javax.swing.plaf.ListUI

Direct Known Subclasses:

BasicListUI, MultiListUI

public abstract class ListUI
extends ComponentUI

The JList pluggable look and feel delegate.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ListUI()	Constructor for subclasses to call.

Method Summary

Modifier and Type	Method	Description
abstract Rectangle	getCellBounds(JList<?> list, int index1, int index2)	Returns the bounding rectangle, in the given list's coordinate system, for the range of cells specified by the two indices.
abstract Point	indexToLocation(JList<?> list, int index)	Returns the origin in the given JList, of the specified item, in the list's coordinate system.
abstract int	locationToIndex(JList<?> list, Point location)	Returns the cell index in the specified JList closest to the given location in the list's coordinate system.

Methods declared in class ComponentUI

contains, createUI, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, getPreferredSize, installUI, paint, uninstallUI, update

Modifier and Type	Method	Description
boolean	contains(JComponent c, int x, int y)	Returns true if the specified x,y location is contained within the look and feel's defined shape of the specified component.
static ComponentUI	createUI(JComponent c)	Returns an instance of the UI delegate for the specified component.
Accessible	getAccessibleChild(JComponent c, int i)	Returns the ith Accessible child of the object.
int	getAccessibleChildrenCount(JComponent c)	Returns the number of accessible children in the object.
int	getBaseline(JComponent c, int width, int height)	Returns the baseline.
Component.BaselineResizeBehavior	getBaselineResizeBehavior(JComponent c)	Returns an enum indicating how the baseline of the component changes as the size changes.
Dimension	getMaximumSize(JComponent c)	Returns the specified component's maximum size appropriate for the look and feel.
Dimension	getMinimumSize(JComponent c)	Returns the specified component's minimum size appropriate for the look and feel.
Dimension	getPreferredSize(JComponent c)	Returns the specified component's preferred size appropriate for the look and feel.
void	installUI(JComponent c)	Configures the specified component appropriately for the look and feel.
void	paint(Graphics g, JComponent c)	Paints the specified component appropriately for the look and feel.
void	uninstallUI(JComponent c)	Reverses configuration which was done on the specified component during installUI.
void	update(Graphics g, JComponent c)	Notifies this UI delegate that it is time to paint the specified component.

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.

Constructor Details

ListUI

protected ListUI()

Constructor for subclasses to call.

Method Details

locationToIndex

public abstract int locationToIndex(JList<?> list,
 Point location)

Returns the cell index in the specified JList closest to the given location in the list's coordinate system. To determine if the cell actually contains the specified location, compare the point against the cell's bounds, as provided by getCellBounds. This method returns -1 if the list's model is empty.

Parameters:

list - the list

location - the coordinates of the point

Returns:

the cell index closest to the given location, or -1

Throws:

NullPointerException - if location is null

indexToLocation

public abstract Point indexToLocation(JList<?> list,
 int index)

Returns the origin in the given JList, of the specified item, in the list's coordinate system. Returns null if the index isn't valid.

Parameters:

list - the list

index - the cell index

Returns:

the origin of the cell, or null

getCellBounds

public abstract Rectangle getCellBounds(JList<?> list,
 int index1,
 int index2)

Returns the bounding rectangle, in the given list's coordinate system, for the range of cells specified by the two indices. The indices can be supplied in any order.

If the smaller index is outside the list's range of cells, this method returns null. If the smaller index is valid, but the larger index is outside the list's range, the bounds of just the first index is returned. Otherwise, the bounds of the valid range is returned.

Parameters:

list - the list

index1 - the first index in the range

index2 - the second index in the range

Returns:

the bounding rectangle for the range of cells, or null