- 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.DefaultListCellRenderer
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- All Implemented Interfaces:
- ImageObserver, MenuContainer, Serializable, Accessible, ListCellRenderer<Object>, SwingConstants
- Direct Known Subclasses:
- DefaultListCellRenderer.UIResource, MetalFileChooserUI.FileRenderer, MetalFileChooserUI.FilterComboBoxRenderer
public class DefaultListCellRenderer extends JLabel implements ListCellRenderer<Object>, Serializable
Renders an item in a list.Implementation Note: This class overrides
invalidate
,validate
,revalidate
,repaint
,isOpaque
, andfirePropertyChange
solely to improve performance. If not overridden, these frequently called methods would execute code paths that are unnecessary for the default list cell renderer. If you write your own renderer, take care to weigh the benefits and drawbacks of overriding these methods.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 seeXMLEncoder
.
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Nested Class Summary
Nested Classes Modifier and Type Class and Description static class
DefaultListCellRenderer.UIResource
A subclass of DefaultListCellRenderer that implements UIResource.-
Nested classes/interfaces inherited from class javax.swing.JLabel
JLabel.AccessibleJLabel
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Nested classes/interfaces inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent
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Nested classes/interfaces inherited from class java.awt.Container
Container.AccessibleAWTContainer
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Nested classes/interfaces inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
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Field Summary
Fields Modifier and Type Field and Description protected static Border
noFocusBorder
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Fields inherited from class javax.swing.JLabel
labelFor
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Fields inherited from class javax.swing.JComponent
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
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Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
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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
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Constructor Summary
Constructors Constructor and Description DefaultListCellRenderer()
Constructs a default renderer object for an item in a list.
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Method Summary
Methods Modifier and Type Method and Description void
firePropertyChange(String propertyName, boolean oldValue, boolean newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, byte oldValue, byte newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, char oldValue, char newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, double oldValue, double newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, float oldValue, float newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, int oldValue, int newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, long oldValue, long newValue)
Overridden for performance reasons.protected void
firePropertyChange(String propertyName, Object oldValue, Object newValue)
Overridden for performance reasons.void
firePropertyChange(String propertyName, short oldValue, short newValue)
Overridden for performance reasons.Component
getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus)
Return a component that has been configured to display the specified value.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
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, updateUI
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Methods inherited from class javax.swing.JComponent
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, 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, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
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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, transferFocusDownCycle, validateTree
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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, 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, transferFocusUpCycle
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Field Detail
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noFocusBorder
protected static Border noFocusBorder
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Constructor Detail
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DefaultListCellRenderer
public DefaultListCellRenderer()
Constructs a default renderer object for an item in a list.
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Method Detail
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getListCellRendererComponent
public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus)
Description copied from interface:ListCellRenderer
Return a component that has been configured to display the specified value. That component'spaint
method is then called to "render" the cell. If it is necessary to compute the dimensions of a list because the list cells do not have a fixed size, this method is called to generate a component on whichgetPreferredSize
can be invoked.- Specified by:
getListCellRendererComponent
in interfaceListCellRenderer<Object>
- Parameters:
list
- The JList we're painting.value
- The value returned by list.getModel().getElementAt(index).index
- The cells index.isSelected
- True if the specified cell was selected.cellHasFocus
- True if the specified cell has the focus.- Returns:
- A component whose paint() method will render the specified value.
- See Also:
JList
,ListSelectionModel
,ListModel
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isOpaque
public boolean isOpaque()
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
isOpaque
in classJComponent
- Returns:
true
if the background is completely opaque and differs from the JList's background;false
otherwise- Since:
- 1.5
- See Also:
JComponent.setOpaque(boolean)
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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()
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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
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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)
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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)
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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:
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)
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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)
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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:
firePropertyChange
in 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, byte oldValue, byte newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classComponent
- Parameters:
propertyName
- the programmatic name of the property that was changedoldValue
- the old value of the property (as a byte)newValue
- the new value of the property (as a byte)- See Also:
Component.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)
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firePropertyChange
public void firePropertyChange(String propertyName, char oldValue, char newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classJComponent
- Parameters:
propertyName
- the programmatic name of the property that was changedoldValue
- the old value of the property (as a char)newValue
- the new value of the property (as a char)- See Also:
Component.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)
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firePropertyChange
public void firePropertyChange(String propertyName, short oldValue, short newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classComponent
- Parameters:
propertyName
- the programmatic name of the property that was changedoldValue
- the old value of the property (as a short)newValue
- the old value of the property (as a short)- See Also:
Component.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)
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firePropertyChange
public void firePropertyChange(String propertyName, int oldValue, int newValue)
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
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firePropertyChange
public void firePropertyChange(String propertyName, long oldValue, long newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classComponent
- Parameters:
propertyName
- the programmatic name of the property that was changedoldValue
- the old value of the property (as a long)newValue
- the new value of the property (as a long)- See Also:
Component.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)
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firePropertyChange
public void firePropertyChange(String propertyName, float oldValue, float newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classComponent
- Parameters:
propertyName
- the programmatic name of the property that was changedoldValue
- the old value of the property (as a float)newValue
- the new value of the property (as a float)- See Also:
Component.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)
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firePropertyChange
public void firePropertyChange(String propertyName, double oldValue, double newValue)
Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
firePropertyChange
in classComponent
- Parameters:
propertyName
- the programmatic name of the property that was changedoldValue
- the old value of the property (as a double)newValue
- the new value of the property (as a double)- See Also:
Component.firePropertyChange(java.lang.String, java.lang.Object, java.lang.Object)
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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:
firePropertyChange
in classJComponent
- Parameters:
propertyName
- the property whose value has changedoldValue
- the property's previous valuenewValue
- the property's new value
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