- All Implemented Interfaces:
ImageObserver
,MenuContainer
,Serializable
,Accessible
,SwingConstants
,TableCellRenderer
- Direct Known Subclasses:
DefaultTableCellRenderer.UIResource
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
.
- See Also:
JTable
-
Nested Class Summary
Nested Classes Modifier and Type Class Description static class
DefaultTableCellRenderer.UIResource
A subclass ofDefaultTableCellRenderer
that implementsUIResource
.Nested classes/interfaces declared in class javax.swing.JLabel
JLabel.AccessibleJLabel
Nested classes/interfaces declared in class javax.swing.JComponent
JComponent.AccessibleJComponent
Nested classes/interfaces declared in class java.awt.Container
Container.AccessibleAWTContainer
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 Border
noFocusBorder
A 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
Fields declared in class java.awt.Component
accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
Fields declared in interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
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. -
Method Summary
Modifier and Type Method 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)
OverridesJComponent.setBackground
to assign the unselected-background color to the specified color.void
setForeground(Color c)
OverridesJComponent.setForeground
to assign the unselected-foreground color to the specified color.protected void
setValue(Object value)
Sets theString
object for the cell being rendered tovalue
.void
updateUI()
Notification from theUIManager
that the look and feel [L&F] has changed.void
validate()
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
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, 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, update
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
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, 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 Details
-
noFocusBorder
A border without focus.
-
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Constructor Details
-
DefaultTableCellRenderer
public DefaultTableCellRenderer()Creates a default table cell renderer.
-
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Method Details
-
setForeground
OverridesJComponent.setForeground
to assign the unselected-foreground color to the specified color.- Overrides:
setForeground
in classJComponent
- Parameters:
c
- set the foreground color to this value- See Also:
Component.getForeground()
-
setBackground
OverridesJComponent.setBackground
to assign the unselected-background color to the specified color.- Overrides:
setBackground
in classJComponent
- Parameters:
c
- set the background color to this value- See Also:
Component.getBackground()
,JComponent.setOpaque(boolean)
-
updateUI
public void updateUI()Notification from theUIManager
that the look and feel [L&F] has changed. Replaces the current UI object with the latest version from theUIManager
.- Overrides:
updateUI
in classJLabel
- 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
andhasFocus
values offalse
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 fromJComponent.isPaintingForPrint()
.- Specified by:
getTableCellRendererComponent
in interfaceTableCellRenderer
- Parameters:
table
- theJTable
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 classJComponent
- 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 classContainer
- Since:
- 1.5
- See Also:
Container.validate()
,Container.layout()
,LayoutManager2
-
validate
public void validate()Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
validate
in classContainer
- See Also:
Container.add(java.awt.Component)
,Container.invalidate()
,Container.isValidateRoot()
,JComponent.revalidate()
,Container.validateTree()
-
revalidate
public void revalidate()Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
revalidate
in classJComponent
- 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 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)
-
repaint
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
repaint
in classJComponent
- Parameters:
r
- aRectangle
containing 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:
repaint
in classComponent
- Since:
- 1.5
- See Also:
Component.update(Graphics)
-
firePropertyChange
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classComponent
- Parameters:
propertyName
- the property whose value has changedoldValue
- the property's previous valuenewValue
- the property's new value
-
firePropertyChange
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classJComponent
- Parameters:
propertyName
- the property whose value has changedoldValue
- the property's previous valuenewValue
- the property's new value
-
setValue
Sets theString
object for the cell being rendered tovalue
.- Parameters:
value
- the string value for this cell; if value isnull
it sets the text value to an empty string- See Also:
JLabel.setText(java.lang.String)
-