javax.swing
Class CellRendererPane

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.CellRendererPane
All Implemented Interfaces:
Accessible, ImageObserver, MenuContainer, Serializable
public class CellRendererPane
extends Container
implements Accessible

This class is inserted in between cell renderers and the components that use them. It just exists to thwart the repaint() and invalidate() methods which would otherwise propagate up the tree when the renderer was configured. It's used by the implementations of JTable, JTree, and JList. For example, here's how CellRendererPane is used in the code the paints each row in a JList: 

   cellRendererPane = new CellRendererPane();
   ...
   Component rendererComponent = renderer.getListCellRendererComponent();
   renderer.configureListCellRenderer(dataModel.getElementAt(row), row);
   cellRendererPane.paintComponent(g, rendererComponent, this, x, y, w, h);

A renderer component must override isShowing() and unconditionally return true to work correctly because the Swing paint does nothing for components with isShowing false.

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 see XMLEncoder.

 

Nested Class Summary

protected  class CellRendererPane.AccessibleCellRendererPane
    This class implements accessibility support for the CellRendererPane class.
 
Nested classes inherited from class java.awt.Container
 
Nested classes inherited from class java.awt.Component
Component.BltBufferStrategy, Component.FlipBufferStrategy
 

 

Field Summary

protected  AccessibleContext accessibleContext
    
 
Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
 
Fields inherited from interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
 

 

Constructor Summary

CellRendererPane()
    Construct a CellRendererPane object.
 

 

Method Summary

protected  void addImpl(Component x, Object constraints, int index)
    If the specified component is already a child of this then we don't bother doing anything - stacking order doesn't matter for cell renderer components (CellRendererPane doesn't paint anyway).<
 AccessibleContext getAccessibleContext()
    Gets the AccessibleContext associated with this CellRendererPane.
 void invalidate()
    Overridden to avoid propagating a invalidate up the tree when the cell renderer child is configured.
 void paint(Graphics g)
    Shouldn't be called.
 void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h)
    Calls this.paintComponent(g, c, p, x, y, w, h, false).
 void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h, boolean shouldValidate)
    Paint a cell renderer component c on graphics object g.
 void paintComponent(Graphics g, Component c, Container p, Rectangle r)
    Calls this.paintComponent() with the rectangles x,y,width,height fields.
 void update(Graphics g)
    Shouldn't be called.
 
Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFont, setLayout, transferFocusBackward, transferFocusDownCycle,