- java.lang.Object
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- java.awt.Component
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- java.awt.Container
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- javax.swing.JComponent
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- javax.swing.JLabel
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- javax.swing.table.DefaultTableCellRenderer
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- 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 aJTable.Implementation Note: This class inherits from
JLabel, a standard component class. HoweverJTableemploys 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 standardJLabelcomponent was not designed to be used this way and we want to avoid triggering arevalidateeach time the cell is drawn. This would greatly decrease performance because therevalidatemessage 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 thevalidate,invalidate,revalidate,repaint, andfirePropertyChangemethods to be no-ops and override theisOpaquemethod 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.beanspackage. Please seeXMLEncoder.- See Also:
JTable, Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static classDefaultTableCellRenderer.UIResourceA subclass ofDefaultTableCellRendererthat implementsUIResource.-
Nested classes/interfaces declared in class javax.swing.JLabel
JLabel.AccessibleJLabel
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Nested classes/interfaces declared in class javax.swing.JComponent
JComponent.AccessibleJComponent
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Nested classes/interfaces declared in class java.awt.Container
Container.AccessibleAWTContainer
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Nested classes/interfaces declared in class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
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Field Summary
Fields Modifier and Type Field Description protected static BordernoFocusBorderA border without focus.-
Fields declared in class javax.swing.JComponent
listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
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Fields declared in class java.awt.Component
accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
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Fields declared in interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
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Fields declared in 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
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Constructor Summary
Constructors Constructor Description DefaultTableCellRenderer()Creates a default table cell renderer.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidfirePropertyChange(String propertyName, boolean oldValue, boolean newValue)Overridden for performance reasons.protected voidfirePropertyChange(String propertyName, Object oldValue, Object newValue)Overridden for performance reasons.ComponentgetTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)Returns the default table cell renderer.voidinvalidate()Overridden for performance reasons.booleanisOpaque()Overridden for performance reasons.voidrepaint()Overridden for performance reasons.voidrepaint(long tm, int x, int y, int width, int height)Overridden for performance reasons.voidrepaint(Rectangle r)Overridden for performance reasons.voidrevalidate()Overridden for performance reasons.voidsetBackground(Color c)OverridesJComponent.setBackgroundto assign the unselected-background color to the specified color.voidsetForeground(Color c)OverridesJComponent.setForegroundto assign the unselected-foreground color to the specified color.protected voidsetValue(Object value)Sets theStringobject for the cell being rendered tovalue.voidupdateUI()Notification from theUIManagerthat the look and feel [L&F] has changed.voidvalidate()Overridden for performance reasons.-
Methods declared in 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
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Methods declared in class javax.swing.JComponent
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, 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, 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, update
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Methods declared in 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, transferFocusDownCycle, validateTree
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Methods declared in 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, 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, 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, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle
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Field Detail
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noFocusBorder
protected static Border noFocusBorder
A border without focus.
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Method Detail
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setForeground
public void setForeground(Color c)
OverridesJComponent.setForegroundto assign the unselected-foreground color to the specified color.- Overrides:
setForegroundin classJComponent- Parameters:
c- set the foreground color to this value- See Also:
Component.getForeground()
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setBackground
public void setBackground(Color c)
OverridesJComponent.setBackgroundto assign the unselected-background color to the specified color.- Overrides:
setBackgroundin classJComponent- Parameters:
c- set the background color to this value- See Also:
Component.getBackground(),JComponent.setOpaque(boolean)
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updateUI
public void updateUI()
Notification from theUIManagerthat the look and feel [L&F] has changed. Replaces the current UI object with the latest version from theUIManager.- Overrides:
updateUIin classJLabel- See Also:
JComponent.updateUI()
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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
isSelectedandhasFocusvalues offalseto 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 fromJComponent.isPaintingForPrint().- Specified by:
getTableCellRendererComponentin interfaceTableCellRenderer- Parameters:
table- theJTablevalue- 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()
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isOpaque
public boolean isOpaque()
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
isOpaquein classJComponent- Returns:
- true if this component is completely opaque
- See Also:
JComponent.setOpaque(boolean)
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invalidate
public void invalidate()
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
invalidatein classContainer- Since:
- 1.5
- See Also:
Container.validate(),Container.layout(),LayoutManager2
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validate
public void validate()
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
validatein classContainer- See Also:
Container.add(java.awt.Component),Container.invalidate(),Container.isValidateRoot(),JComponent.revalidate(),Container.validateTree()
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revalidate
public void revalidate()
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
revalidatein classJComponent- See Also:
Component.invalidate(),Container.validate(),JComponent.isValidateRoot(),RepaintManager.addInvalidComponent(javax.swing.JComponent)
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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:
repaintin classJComponent- 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:
JComponent.isPaintingOrigin(),Component.isShowing(),RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)
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repaint
public void repaint(Rectangle r)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
repaintin classJComponent- Parameters:
r- aRectanglecontaining the dirty region- See Also:
JComponent.isPaintingOrigin(),Component.isShowing(),RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)
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repaint
public void repaint()
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
repaintin classComponent- Since:
- 1.5
- See Also:
Component.update(Graphics)
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firePropertyChange
protected void firePropertyChange(String propertyName, Object oldValue, Object newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChangein classComponent- Parameters:
propertyName- the property whose value has changedoldValue- the property's previous valuenewValue- the property's new value
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firePropertyChange
public void firePropertyChange(String propertyName, boolean oldValue, boolean newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChangein classJComponent- Parameters:
propertyName- the property whose value has changedoldValue- the property's previous valuenewValue- the property's new value
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setValue
protected void setValue(Object value)
Sets theStringobject for the cell being rendered tovalue.- Parameters:
value- the string value for this cell; if value isnullit sets the text value to an empty string- See Also:
JLabel.setText(java.lang.String)
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