Overview | Package | Class | Tree | Deprecated | Index | Help			Java Platform 1.1.7
PREV CLASS | NEXT CLASS	FRAMES | NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

Class com.sun.java.swing.CellRendererPane

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--com.sun.java.swing.CellRendererPane

public class CellRendererPane

extends java.awt.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 propogate 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 Swing1.0 applications. It will not be possible to load serialized Swing1.0 objects with future releases of Swing. The JDK1.2 release of Swing will be the compatibility baseline for the serialized form of Swing objects.

See Also:

Serialized Form

Inner Class Summary

CellRendererPane.AccessibleCellRendererPane

Field Summary

AccessibleContext

accessibleContext

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Constructor Summary

CellRendererPane()

Method Summary

void	addImpl(java.awt.Component x, java.lang.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() Get the AccessibleContext associated with this CellRendererPane
void	invalidate() Overridden to avoid propogating a invalidate up the tree when the cell renderer child is configured.
void	paint(java.awt.Graphics g) Shouldn't be called.
void	paintComponent(java.awt.Graphics g, java.awt.Component c, java.awt.Container p, int x, int y, int w, int h, boolean shouldValidate) Paint a cell renderer component c on graphics object g.
void	paintComponent(java.awt.Graphics g, java.awt.Component c, java.awt.Container p, int x, int y, int w, int h) Calls this.paintComponent(g, c, p, x, y, w, h, false).
void	paintComponent(java.awt.Graphics g, java.awt.Component c, java.awt.Container p, java.awt.Rectangle r) Calls this.paintComponent() with the rectangles x,y,width,height fields.
void	update(java.awt.Graphics g) Shouldn't be called.

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addNotify, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponentAt, getComponentAt, getComponent, getComponentCount, getComponents, getInsets, getLayout, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paintComponents, paint, paramString, preferredSize, printComponents, print, processContainerEvent, processEvent, removeAll, remove, remove, removeContainerListener, removeNotify, setLayout, update, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getHeight, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMinimumSize, getName, getParent, getPeer, getPreferredSize, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, paint, paramString, postEvent, preferredSize, prepareImage, prepareImage, printAll, print, processComponentEvent, processEvent, processFocusEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFont, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, update, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notifyAll, notify, toString, wait, wait, wait

Field Detail

accessibleContext

protected AccessibleContext accessibleContext

Constructor Detail

CellRendererPane

public CellRendererPane()

Method Detail

invalidate

public void invalidate()

Overridden to avoid propogating a invalidate up the tree when the cell renderer child is configured.

Overrides:

invalidate in class java.awt.Container

paint

public void paint(java.awt.Graphics g)

Shouldn't be called.

Overrides:

paint in class java.awt.Container

update

public void update(java.awt.Graphics g)

Shouldn't be called.

Overrides:

update in class java.awt.Container

addImpl

protected void addImpl(java.awt.Component x,
                       java.lang.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).<

Overrides:

addImpl in class java.awt.Container

paintComponent

public void paintComponent(java.awt.Graphics g,
                           java.awt.Component c,
                           java.awt.Container p,
                           int x,
                           int y,
                           int w,
                           int h,
                           boolean shouldValidate)

Paint a cell renderer component c on graphics object g. Before the component is drawn it's reparented to this (if that's neccessary), it's bounds are set to w,h and the graphics object is (effectively) translated to x,y. If it's a JComponent, double buffering is temporarily turned off. After the component is painted it's bounds are reset to -w, -h, 0, 0 so that, if it's the last renderer component painted, it will not start consuming input. The Container p is the component we're actually drawing on, typically it's equal to this.getParent(). If shouldValidate is true the component c will be validated before painted.

paintComponent

public void paintComponent(java.awt.Graphics g,
                           java.awt.Component c,
                           java.awt.Container p,
                           int x,
                           int y,
                           int w,
                           int h)

Calls this.paintComponent(g, c, p, x, y, w, h, false).

paintComponent

public void paintComponent(java.awt.Graphics g,
                           java.awt.Component c,
                           java.awt.Container p,
                           java.awt.Rectangle r)

Calls this.paintComponent() with the rectangles x,y,width,height fields.

getAccessibleContext

public AccessibleContext getAccessibleContext()

Get the AccessibleContext associated with this CellRendererPane

Specified by:

getAccessibleContext in interface Accessible

Returns:

the AccessibleContext of this CellRendererPane