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javax.swing.table
Class DefaultTableCellRenderer

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.JLabel
                          |
                          +--javax.swing.table.DefaultTableCellRenderer

All Implemented Interfaces:

Accessible, ImageObserver, MenuContainer, Serializable, SwingConstants, TableCellRenderer

Direct Known Subclasses:

DefaultTableCellRenderer.UIResource

public class DefaultTableCellRenderer

extends JLabel

implements TableCellRenderer, Serializable

The standard class for rendering (displaying) individual cells in a JTable.

Implementation Note: This class inherits from JLabel, a standard component class. However JTable employs a unique mechanism for rendering its cells and therefore requires some slightly modified behavior from its cell renderer. The table class defines a single cell renderer and uses it as a as a rubber-stamp for rendering all cells in the table; it renders the first cell, changes the contents of that cell renderer, shifts the origin to the new location, re-draws it, and so on. The standard JLabel component was not designed to be used this way and we want to avoid triggering a revalidate each time the cell is drawn. This would greatly decrease performance because the revalidate message would be passed up the hierarchy of the container to determine whether any other components would be affected. So this class overrides the validate, revalidate, repaint, and firePropertyChange methods to be no-ops. If you write your own renderer, please keep this performance consideration in mind.

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. A future release of Swing will provide support for long term persistence.

See Also:

JTable, Serialized Form

Inner Class Summary

static class

DefaultTableCellRenderer.UIResource A subclass of DefaultTableCellRenderer that implements UIResource.

Inner classes inherited from class javax.swing.JLabel

JLabel.AccessibleJLabel

Inner classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Inner classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

Component.AccessibleAWTComponent

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, NORTH, NORTH_EAST, NORTH_WEST, 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

DefaultTableCellRenderer()
Creates a default table cell renderer.

Method Summary

void	firePropertyChange(String propertyName, boolean oldValue, boolean newValue) Overridden for performance reasons.
protected void	firePropertyChange(String propertyName, Object oldValue, Object newValue) Overridden for performance reasons.
Component	getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) Returns the default table cell renderer.
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	setBackground(Color c) Overrides JComponent.setForeground to assign the unselected-background color to the specified color.
void	setForeground(Color c) Overrides JComponent.setForeground to assign the unselected-foreground color to the specified color.
protected void	setValue(Object value) Sets the string for the cell being rendered to value.
void	updateUI() Notification from the UIManager that the look and feel [L&F] has changed.
void	validate() Overridden for performance reasons.

Methods inherited from class javax.swing.JLabel

checkHorizontalKey, checkVerticalKey, getAccessibleContext, getDisabledIcon, getDisplayedMnemonic, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getLabelFor, getText, getUI, getUIClassID, getVerticalAlignment, getVerticalTextPosition, imageUpdate, paramString, setDisabledIcon, setDisplayedMnemonic, setDisplayedMnemonic, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabelFor, setText, setUI, setVerticalAlignment, setVerticalTextPosition

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getDebugGraphicsOptions, getGraphics, getHeight, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getVerifyInputWhenFocusTarget, getVisibleRect, getWidth, getX, getY, grabFocus, hasFocus, hide, isDoubleBuffered, isFocusCycleRoot, isFocusTraversable, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processFocusEvent, processKeyBinding, processKeyEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, requestDefaultFocus, requestFocus, resetKeyboardActions, reshape, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBorder, setDebugGraphicsOptions, setDoubleBuffered, setEnabled, setFont, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getLayout, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setLayout, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, inside, isDisplayable, isEnabled, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus

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

DefaultTableCellRenderer

public DefaultTableCellRenderer()

Creates a default table cell renderer.

Method Detail

setForeground

public void setForeground(Color c)

Overrides JComponent.setForeground to assign the unselected-foreground color to the specified color.

Overrides:

setForeground in class JComponent

Parameters:

c - set the foreground color to this value

setBackground

public void setBackground(Color c)

Overrides JComponent.setForeground to assign the unselected-background color to the specified color.

Overrides:

setBackground in class JComponent

Parameters:

c - set the background color to this value

updateUI

public void updateUI()

Notification from the UIManager that the look and feel [L&F] has changed. Replaces the current UI object with the latest version from the UIManager.

Overrides:

updateUI in class JLabel

See Also:

JComponent.updateUI()

getTableCellRendererComponent

public Component getTableCellRendererComponent(JTable table,
                                               Object value,
                                               boolean isSelected,
                                               boolean hasFocus,
                                               int row,
                                               int column)

Returns the default table cell renderer.

Specified by:

getTableCellRendererComponent in interface TableCellRenderer

Parameters:

table - the JTable

value - the value to assign to the cell at [row, column]

isSelected - true if cell is selected

isFocus - true if cell has focus

row - the row of the cell to render

column - the column of the cell to render

Returns:

the default table cell renderer

validate

public void validate()

Overridden for performance reasons. See the Implementation Note for more information.

Overrides:

validate in class Container

Following copied from class: java.awt.Container

See Also:

Container.validate(), Component.invalidate()

revalidate

public void revalidate()

Overridden for performance reasons. See the Implementation Note for more information.

Overrides:

revalidate in class JComponent

Following copied from class: javax.swing.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

Following copied from class: javax.swing.JComponent

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

Following copied from class: javax.swing.JComponent

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

Following copied from class: javax.swing.JComponent

Parameters:

propertyName - the programmatic name of the property that was changed

oldValue - the old value of the property

newValue - the new value of the property

See Also:

PropertyChangeSupport

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

Following copied from class: javax.swing.JComponent

See Also:

JComponent.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)

setValue

protected void setValue(Object value)

Sets the string for the cell being rendered to value.

Parameters:

value - the string value for this cell; if value is null it sets the text value to an empty string

See Also:

JLabel.setText(java.lang.String)