org.apache.poi.contrib.poibrowser
Class ExtendableTreeCellRenderer

java.lang.Object
  org.apache.poi.contrib.poibrowser.ExtendableTreeCellRenderer

All Implemented Interfaces:

javax.swing.tree.TreeCellRenderer

public class ExtendableTreeCellRenderer
extends java.lang.Object
implements javax.swing.tree.TreeCellRenderer

This is a TreeCellRenderer implementation which is able to render arbitrary objects. The ExtendableTreeCellRenderer does not do the rendering itself but instead dispatches to class-specific renderers. A class/renderer pair must be registered using the register(java.lang.Class, javax.swing.tree.TreeCellRenderer) method. If a class has no registered renderer, the renderer of its closest superclass is used. Since the ExtendableTreeCellRenderer always has a default renderer for the Object class, rendering is always possible. The default Object renderer can be replaced by another renderer but it cannot be unregistered.

Since:

2002-01-22

Version:

$Id: ExtendableTreeCellRenderer.java 489730 2006-12-22 19:18:16Z bayard $

Author:

Rainer Klute <klute@rainer-klute.de>

Field Summary

protected java.util.Map

renderers Maps classes to renderers.

Constructor Summary

ExtendableTreeCellRenderer()

Method Summary

protected javax.swing.tree.TreeCellRenderer	findRenderer(java.lang.Class c) Find the renderer for the specified class.
java.awt.Component	getTreeCellRendererComponent(javax.swing.JTree tree, java.lang.Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) Renders an object in a tree cell depending of the object's class.
void	register(java.lang.Class c, javax.swing.tree.TreeCellRenderer renderer) Registers a renderer for a class.
void	unregister(java.lang.Class c) Unregisters a renderer for a class.

Methods inherited from class java.lang.Object

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

Field Detail

renderers

protected java.util.Map renderers

Maps classes to renderers.

Constructor Detail

ExtendableTreeCellRenderer

public ExtendableTreeCellRenderer()

Method Detail

register

public void register(java.lang.Class c,
                     javax.swing.tree.TreeCellRenderer renderer)

Registers a renderer for a class.

unregister

public void unregister(java.lang.Class c)

Unregisters a renderer for a class. The renderer for the Object class cannot be unregistered.

getTreeCellRendererComponent

public java.awt.Component getTreeCellRendererComponent(javax.swing.JTree tree,
                                                       java.lang.Object value,
                                                       boolean selected,
                                                       boolean expanded,
                                                       boolean leaf,
                                                       int row,
                                                       boolean hasFocus)

Renders an object in a tree cell depending of the object's class.

Specified by:

getTreeCellRendererComponent in interface javax.swing.tree.TreeCellRenderer

See Also:

TreeCellRenderer.getTreeCellRendererComponent(javax.swing.JTree, java.lang.Object, boolean, boolean, boolean, int, boolean)

findRenderer

protected javax.swing.tree.TreeCellRenderer findRenderer(java.lang.Class c)

Find the renderer for the specified class.