public class DefaultTableCellRenderer extends JLabel implements TableCellRenderer, Serializable
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 JavaBeans™
has been added to the java.beans package.
Please see XMLEncoder.
JTable| Modifier and Type | Class and Description |
|---|---|
static class |
DefaultTableCellRenderer.UIResource
A subclass of
DefaultTableCellRenderer that
implements UIResource. |
JLabel.AccessibleJLabelJComponent.AccessibleJComponentContainer.AccessibleAWTContainerComponent.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy| Modifier and Type | Field and Description |
|---|---|
protected static Border |
noFocusBorder |
listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOWaccessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENTBOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WESTABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH| Constructor and Description |
|---|
DefaultTableCellRenderer()
Creates a default table cell renderer.
|
| Modifier and Type | Method and Description |
|---|---|
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.
|
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, setVerticalTextPositionaddAncestorListener, 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, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, 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, updateadd, 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, transferFocusDownCycle, validateTreeaction, 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, 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, transferFocusBackward, transferFocusUpCycleprotected static Border noFocusBorder
public DefaultTableCellRenderer()
public void setForeground(Color c)
JComponent.setForeground to assign
the unselected-foreground color to the specified color.setForeground in class JComponentc - set the foreground color to this valueComponent.getForeground()public void setBackground(Color c)
JComponent.setBackground to assign
the unselected-background color to the specified color.setBackground in class JComponentc - set the background color to this valueComponent.getBackground(),
JComponent.setOpaque(boolean)public void updateUI()
UIManager that the look and feel
[L&F] has changed.
Replaces the current UI object with the latest version from the
UIManager.updateUI in class JLabelJComponent.updateUI()public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
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().
getTableCellRendererComponent in interface TableCellRenderertable - the JTablevalue - 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 renderJComponent.isPaintingForPrint()public boolean isOpaque()
isOpaque in class JComponentJComponent.setOpaque(boolean)public void invalidate()
invalidate in class ContainerContainer.validate(),
Container.layout(),
LayoutManager2public void validate()
validate in class ContainerContainer.add(java.awt.Component),
Container.invalidate(),
Container.isValidateRoot(),
JComponent.revalidate(),
Container.validateTree()public void revalidate()
revalidate in class JComponentComponent.invalidate(),
Container.validate(),
JComponent.isValidateRoot(),
RepaintManager.addInvalidComponent(javax.swing.JComponent)public void repaint(long tm,
int x,
int y,
int width,
int height)
repaint in class JComponenttm - 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 regionJComponent.isPaintingOrigin(),
Component.isShowing(),
RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)public void repaint(Rectangle r)
repaint in class JComponentr - a Rectangle containing the dirty regionJComponent.isPaintingOrigin(),
Component.isShowing(),
RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)public void repaint()
repaint in class ComponentComponent.update(Graphics)protected void firePropertyChange(String propertyName, Object oldValue, Object newValue)
firePropertyChange in class ComponentpropertyName - the property whose value has changedoldValue - the property's previous valuenewValue - the property's new valuepublic void firePropertyChange(String propertyName, boolean oldValue, boolean newValue)
firePropertyChange in class JComponentpropertyName - the property whose value has changedoldValue - the property's previous valuenewValue - the property's new valueprotected void setValue(Object value)
String object for the cell being rendered to
value.value - the string value for this cell; if value is
null it sets the text value to an empty stringJLabel.setText(java.lang.String) Submit a bug or feature
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