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 JavaBeans™ has been added to the java.beans
package. Please see XMLEncoder
.
- See Also:
-
JTable
, Serialized Form
Nested Class Summary
Modifier and Type | Class | Description |
---|---|---|
static class | DefaultTableCellRenderer.UIResource | A subclass of |
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
Field Summary
Modifier and Type | Field | Description |
---|---|---|
protected static Border | noFocusBorder | A border without focus. |
Fields declared in class javax.swing.JLabel
labelFor
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
Constructor Summary
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) | Overrides |
void | setForeground(Color c) | Overrides |
protected void | setValue(Object value) | Sets the |
void | updateUI() | Notification from the |
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, 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, 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
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Field Detail
noFocusBorder
protected static Border noFocusBorder
A border without focus.
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 classJComponent
- 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 classJComponent
- 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 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
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 interfaceTableCellRenderer
- Parameters:
-
table
- theJTable
-
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
- 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 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:
-
JComponent.isPaintingOrigin()
,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 classJComponent
- Parameters:
-
r
- aRectangle
containing the dirty region - See Also:
-
JComponent.isPaintingOrigin()
,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 classComponent
- 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 classComponent
- Parameters:
-
propertyName
- the property whose value has changed -
oldValue
- the property's previous value -
newValue
- 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 classJComponent
- Parameters:
-
propertyName
- the property whose value has changed -
oldValue
- the property's previous value -
newValue
- 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 isnull
it sets the text value to an empty string - See Also:
JLabel.setText(java.lang.String)