JavaTM 2 Platform Std. Ed. v1.6.0
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:
- ImageObserver, MenuContainer, Serializable, Accessible, 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. 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 JavaBeansTM
has been added to the java.beans package.
Please see XMLEncoder .
- See Also:
JTable
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 |
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, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, 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, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, 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, 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, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, 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 |
noFocusBorder
protected static Border noFocusBorder
- An empty
Border . This field might not be used. To change the
Border used by this renderer override the
getTableCellRendererComponent method and set the border
of the returned component directly.
DefaultTableCellRenderer
public DefaultTableCellRenderer()
- Creates a default table cell renderer.
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() ,
JComponent.setOpaque(boolean)
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.
During a printing operation, this method will be called with
isSelected and hasFocus values of
false to prevent selection and focus from appearing
in the printed output. To do other customization based on whether
or not the table is being printed, check the return value from
JComponent.isPaintingForPrint() .
- 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 selectedhasFocus - true if cell has focusrow - the row of the cell to rendercolumn - the column of the cell to render
- Returns:
- the default table cell renderer
- See Also:
JComponent.isPaintingForPrint()
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 ,
LayoutManager2.invalidateLayout(Container)
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() ,
Container.validateTree()
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 usedx - the x value of the dirty regiony - the y value of the dirty regionwidth - the width of the dirty regionheight - 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 in class Component
- Parameters:
propertyName - the property whose value has changedoldValue - the property's previous valuenewValue - the property's new value
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 changedoldValue - the property's previous valuenewValue - the property's new value
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)
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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