JavaTM 2 Platform
Std. Ed. v1.4.2

javax.swing
Class DefaultListCellRenderer

java.lang.Object
  extended byjava.awt.Component
      extended byjava.awt.Container
          extended byjavax.swing.JComponent
              extended byjavax.swing.JLabel
                  extended byjavax.swing.DefaultListCellRenderer
All Implemented Interfaces:
Accessible, ImageObserver, ListCellRenderer, MenuContainer, Serializable, SwingConstants
Direct Known Subclasses:
DefaultListCellRenderer.UIResource, MetalFileChooserUI.FileRenderer, MetalFileChooserUI.FilterComboBoxRenderer

public class DefaultListCellRenderer
extends JLabel
implements ListCellRenderer, Serializable

Renders an item in a list.

Implementation Note: This class overrides validate, revalidate, repaint, and firePropertyChange solely to improve performance. If not overridden, these frequently called methods would execute code paths that are unnecessary for the default list cell renderer. If you write your own renderer, take care to weigh the benefits and drawbacks of overriding these methods.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the java.beans package. Please see XMLEncoder.


Nested Class Summary
static class DefaultListCellRenderer.UIResource
          A subclass of DefaultListCellRenderer that implements UIResource.
 
Nested classes inherited from class javax.swing.JLabel
JLabel.AccessibleJLabel
 
Nested classes inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent
 
Nested classes inherited from class java.awt.Container
Container.AccessibleAWTContainer
 
Nested classes inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy
 
Field Summary
protected static Border noFocusBorder
           
 
Fields inherited from class javax.swing.JLabel
labelFor
 
Fields inherited from class javax.swing.JComponent
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
 
Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
 
Fields inherited from interface javax.swing.SwingConstants
BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST
 
Fields inherited from interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
 
Constructor Summary
DefaultListCellRenderer()
          Constructs a default renderer object for an item in a list.
 
Method Summary
 void firePropertyChange(String propertyName, boolean oldValue, boolean newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, byte oldValue, byte newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, char oldValue, char newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, double oldValue, double newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, float oldValue, float newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, int oldValue, int newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, long oldValue, long newValue)
          Overridden for performance reasons.
protected  void firePropertyChange(String propertyName, Object oldValue, Object newValue)
          Overridden for performance reasons.
 void firePropertyChange(String propertyName, short oldValue, short newValue)
          Overridden for performance reasons.
 Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus)
          Return a component that has been configured to display the specified value.
 void repaint(long tm, int x, int y, int width, int height)
          Overridden for performance reasons.
 void repaint(Rectangle r)
          Overridden for performance reasons.
 void revalidate()
          Overridden for performance reasons.
 void validate()
          Overridden for performance reasons.
 
Methods inherited from class javax.swing.JLabel
checkHorizontalKey, checkVerticalKey, getAccessibleContext, getDisabledIcon, getDisplayedMnemonic, getDisplayedMnemonicIndex, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getLabelFor, getText, getUI, getUIClassID, getVerticalAlignment, getVerticalTextPosition, imageUpdate, paramString, setDisabledIcon, setDisplayedMnemonic, setDisplayedMnemonic, setDisplayedMnemonicIndex, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabelFor, setText, setUI, setVerticalAlignment, setVerticalTextPosition, updateUI
 
Methods inherited from class javax.swing.JComponent
addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
 
Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validateTree
 
Methods inherited from class java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

noFocusBorder

protected static Border noFocusBorder
Constructor Detail

DefaultListCellRenderer

public DefaultListCellRenderer()
Constructs a default renderer object for an item in a list.

Method Detail

getListCellRendererComponent

public Component getListCellRendererComponent(JList list,
                                              Object value,
                                              int index,
                                              boolean isSelected,
                                              boolean cellHasFocus)
Description copied from interface: ListCellRenderer
Return a component that has been configured to display the specified value. That component's paint method is then called to "render" the cell. If it is necessary to compute the dimensions of a list because the list cells do not have a fixed size, this method is called to generate a component on which getPreferredSize can be invoked.

Specified by:
getListCellRendererComponent in interface ListCellRenderer
Parameters:
list - The JList we're painting.
value - The value returned by list.getModel().getElementAt(index).
index - The cells index.
isSelected - True if the specified cell was selected.
cellHasFocus - True if the specified cell has the focus.
Returns:
A component whose paint() method will render the specified value.
See Also:
JList, ListSelectionModel, ListModel

validate

public void validate()
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
validate in class Container
See Also:
Container.add(java.awt.Component), Component.invalidate(), JComponent.revalidate()

revalidate

public void revalidate()
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
revalidate in class JComponent
See Also:
Component.invalidate(), Container.validate(), JComponent.isValidateRoot(), RepaintManager.addInvalidComponent(javax.swing.JComponent)

repaint

public void repaint(long tm,
                    int x,
                    int y,
                    int width,
                    int height)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
repaint in class JComponent
Parameters:
tm - this parameter is not used
x - the x value of the dirty region
y - the y value of the dirty region
width - the width of the dirty region
height - the height of the dirty region
See Also:
Component.isShowing(), RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)

repaint

public void repaint(Rectangle r)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
repaint in class JComponent
Parameters:
r - a Rectangle containing the dirty region
See Also:
Component.isShowing(), RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)

firePropertyChange

protected void firePropertyChange(String propertyName,
                                  Object oldValue,
                                  Object newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as an Object)
newValue - the new value of the property (as an Object)
See Also:
PropertyChangeSupport

firePropertyChange

public void firePropertyChange(String propertyName,
                               byte oldValue,
                               byte newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a byte)
newValue - the new value of the property (as a byte)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               char oldValue,
                               char newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a char)
newValue - the new value of the property (as a char)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               short oldValue,
                               short newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a short)
newValue - the old value of the property (as a short)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               int oldValue,
                               int newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as an int)
newValue - the new value of the property (as an int)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               long oldValue,
                               long newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a long)
newValue - the new value of the property (as a long)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               float oldValue,
                               float newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a float)
newValue - the new value of the property (as a float)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               double oldValue,
                               double newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a double)
newValue - the new value of the property (as a double)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

firePropertyChange

public void firePropertyChange(String propertyName,
                               boolean oldValue,
                               boolean newValue)
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
firePropertyChange in class JComponent
Parameters:
propertyName - the programmatic name of the property that was changed
oldValue - the old value of the property (as a boolean)
newValue - the new value of the property (as a boolean)
See Also:
JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

JavaTM 2 Platform
Std. Ed. v1.4.2

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.


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