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javax.swing.table
Class DefaultTableCellRenderer


java.lang.Object
  extended by java.awt.Component
      extended by java.awt.Container
          extended by javax.swing.JComponent
              extended by javax.swing.JLabel
                  extended by 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. As the renderer is only parented for the lifetime of a painting operation we similarly want to avoid the overhead associated with walking the hierarchy for painting operations. So this class overrides the validate, invalidate, revalidate, repaint, and firePropertyChange methods to be no-ops and override the isOpaque method solely to improve performance. 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. As of 1.4, support for long term storage of all JavaBeans TM has been added to the java.beans package. Please see XMLEncoder .

See Also:
JTable

Nested Class Summary
static class DefaultTableCellRenderer.UIResource
          A subclass of DefaultTableCellRenderer 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
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 invalidate ()
          Overridden for performance reasons.
 boolean isOpaque ()
          Overridden for performance reasons.
 void repaint ()
          Overridden for performance reasons.
 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.setBackground 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 object 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 , 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
 
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 , getAncestorListeners , getAutoscrolls , getBorder , getBounds , getClientProperty , getComponentGraphics , getComponentPopupMenu , getConditionForKeyStroke , getDebugGraphicsOptions , getDefaultLocale , getFontMetrics , getGraphics , getHeight , getInheritsPopupMenu , getInputMap , getInputMap , getInputVerifier , getInsets , getInsets , getListeners , getLocation , getMaximumSize , getMinimumSize , getNextFocusableComponent , getPopupLocation getPreferredSize , getPreferredSize getPropertyChangeListeners , getPropertyChangeListeners , getRegisteredKeyStrokes , getRootPane , getSize , getToolTipLocation , getToolTipText , getToolTipText , getTopLevelAncestor , getTransferHandler , getVerifyInputWhenFocusTarget , getVetoableChangeListeners , getVisibleRect , getWidth , getX , getY , grabFocus , isDoubleBuffered , isLightweightComponent , isManagingFocus , isMaximumSizeSet , isMinimumSizeSet , isOptimizedDrawingEnabled , isPaintingTile , isPreferredSizeSet , isRequestFocusEnabled , isValidateRoot , paint , paintBorder , paintChildren , paintComponent , paintImmediately , paintImmediately , print , printAll , printBorder , printChildren , printComponent , processComponentKeyEvent , processKeyBinding , processKeyEvent , processMouseEvent , processMouseMotionEvent , putClientProperty , registerKeyboardAction , registerKeyboardAction , removeAncestorListener , removeNotify , removePropertyChangeListener , removePropertyChangeListener , removeVetoableChangeListener , requestDefaultFocus , requestFocus , requestFocus , requestFocusInWindow , requestFocusInWindow , resetKeyboardActions , reshape , scrollRectToVisible , setActionMap , setAlignmentX , setAlignmentY , setAutoscrolls , setBorder , setComponentPopupMenu , setDebugGraphicsOptions , setDefaultLocale , setDoubleBuffered , setEnabled , setFocusTraversalKeys , setFont , setInheritsPopupMenu , 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 , addPropertyChangeListener , addPropertyChangeListener , applyComponentOrientation , areFocusTraversalKeysSet , countComponents , deliverEvent , doLayout , findComponentAt , findComponentAt , getComponent , getComponentAt , getComponentAt , getComponentCount , getComponents , getComponentZOrder , getContainerListeners , getFocusTraversalKeys , getFocusTraversalPolicy , getLayout , getMousePosition insets , insets invalidate , isAncestorOf , isFocusCycleRoot , isFocusCycleRoot , isFocusTraversalPolicyProvider , isFocusTraversalPolicySet , layout , list , list , locate , minimumSize , paintComponents , preferredSize , printComponents , processContainerEvent , processEvent , remove , remove , removeAll , removeContainerListener , setComponentZOrder setFocusCycleRoot , setFocusCycleRoot setFocusTraversalKeys , setFocusTraversalPolicy , setFocusTraversalPolicyProvider , 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 , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , 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 , getMousePosition , getMouseWheelListeners , getName , getParent , getPeer , getPropertyChangeListeners , getPropertyChangeListeners , getSize , getToolkit , getTreeLock , gotFocus , handleEvent , hasFocus , hide , inside , isBackgroundSet , isCursorSet , isDisplayable , isEnabled , isFocusable , isFocusOwner , isFocusTraversable , isFontSet , isForegroundSet , isLightweight , isMaximumSizeSet , isMinimumSizeSet , isPreferredSizeSet , 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 , removePropertyChangeListener repaint , removePropertyChangeListener , 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

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
See Also:
Component.getForeground()

setBackground


public void setBackground(Color c)
Overrides JComponent.setBackground to assign the unselected-background color to the specified color.

Overrides:
setBackground in class JComponent
Parameters:
c - set the background color to this value
See Also:
Component.getBackground()

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
hasFocus - 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

isOpaque


public boolean isOpaque()
Overridden for performance reasons. See the Implementation Note for more information.

Overrides:
isOpaque in class JComponent
Returns:
true if this component is completely opaque
See Also:
JComponent.setOpaque(boolean)

invalidate


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

Overrides:
invalidate in class Container
Since:
1.5
See Also:
Container.validate() , Container.layout() , LayoutManager

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)

repaint


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

Overrides:
repaint in class Component
Since:
1.5
See Also:
Component.update(Graphics)

firePropertyChange


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

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

setValue


protected void setValue(Object value)
Sets the String object 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)