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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2001 Intersect Software Corporation
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see http://www.gnu.org
*/
package net.wotonomy.ui.swing;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import javax.swing.JTree;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import net.wotonomy.foundation.internal.WotonomyException;
import net.wotonomy.ui.EODisplayGroup;
/**
* A DisplayGroupNode that exposes the MutableTreeNode interface.
* This was required so that other subclasses of DisplayGroupNode
* could opt out of supporting MutableTreeNode (so that they can
* implement IlvActivity, for example).
*
* @author michael@mpowers.net
* @author $Author: cgruber $
* @version $Revision: 904 $
*/
public class MutableDisplayGroupNode
extends DisplayGroupNode implements MutableTreeNode
{
/**
* Constructor for all nodes.
* Root node must have a null delegate.
*/
public MutableDisplayGroupNode(
TreeModelAssociation aParentAssociation,
EODisplayGroup aParentGroup,
Object anObject )
{
super( aParentAssociation, aParentGroup, anObject );
}
public int getIndex(TreeNode node)
{
return getIndex( (DisplayGroupNode) node );
}
public TreeNode getChildAt(int childIndex)
{
return (TreeNode) getChildNodeAt( childIndex );
}
public TreeNode getParent()
{
Object parent = getParentGroup();
if ( parent instanceof TreeNode )
{
return (TreeNode) parent;
}
return null;
}
public void insert(MutableTreeNode aChild, int anIndex)
{
if ( aChild instanceof DisplayGroupNode )
{
insertObjectAtIndex(
((DisplayGroupNode)aChild).object(), anIndex );
}
else // not a display group node
{
throw new WotonomyException(
"Cannot insert nodes of type: " + aChild );
}
}
/**
* Removes the node at the index corresponding
* to the index of the object.
*/
public void remove(MutableTreeNode node)
{
if ( node instanceof DisplayGroupNode )
{
remove((DisplayGroupNode)node);
}
else // not a display group node
{
throw new WotonomyException(
"Cannot insert nodes of type: " + node );
}
}
/**
* Removes the value in the parent display group
* at the index that corresponds to the index of this node
* and add it to the end of the display group that corresponds
* to the user value of the specified node.
*/
public void setParent(MutableTreeNode newParent)
{
if ( newParent instanceof DisplayGroupNode )
{
setParent((DisplayGroupNode)newParent);
}
else // not a display group node
{
throw new WotonomyException(
"Cannot set parent to nodes of type: " + newParent );
}
}
/**
* Overridden to remember expanded state for nodes
* after nodes have been rearranged.
*/
protected void fireEventsForChanges(
Object[] oldObjects, Object[] newObjects )
{
if ( !( parentAssociation.object() instanceof JTree ) )
{
super.fireEventsForChanges( oldObjects, newObjects );
return;
}
JTree tree = (JTree) parentAssociation.object();
Map expansionMap = new HashMap();
DisplayGroupNode node;
TreePath path;
for ( int i = 0; i < oldObjects.length; i++ )
{
node = (DisplayGroupNode)
getChildNodeForObject( oldObjects[i] );
if ( node != null && ! node.isLeaf() )
{
expansionMap.put( node, new Boolean(
tree.isExpanded( node.treePath() ) ) );
}
}
super.fireEventsForChanges( oldObjects, newObjects );
Object value;
Iterator iterator = new LinkedList( childNodes.values() ).iterator();
while ( iterator.hasNext() )
{
node = (DisplayGroupNode) iterator.next();
value = expansionMap.get( node );
if ( value != null )
{
if ( Boolean.TRUE.equals( value ) )
{
tree.expandPath( node.treePath() );
}
else
{
tree.collapsePath( node.treePath() );
}
}
}
}
}
/*
* $Log$
* Revision 1.2 2006/02/18 23:19:05 cgruber
* Update imports and maven dependencies.
*
* Revision 1.1 2006/02/16 13:22:22 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.8 2003/08/06 23:07:52 chochos
* general code cleanup (mostly, removing unused imports)
*
* Revision 1.7 2002/04/23 19:12:28 mpowers
* Reimplemented fireEventsForChanges. Fitter and happier.
*
* Revision 1.6 2002/04/10 21:20:04 mpowers
* Better handling for tree nodes when working with editing contexts.
* Better handling for invalidation. No longer broadcasting events
* when nodes have not been "registered" in the tree.
*
* Revision 1.5 2002/04/03 20:01:47 mpowers
* Now remembers expanded state.
*
* Revision 1.4 2002/03/08 23:19:07 mpowers
* Added getParentGroup to DisplayGroupNode.
*
* Revision 1.3 2002/02/27 23:19:17 mpowers
* Refactoring of TreeAssociation to create TreeModelAssociation parent.
*
* Revision 1.2 2001/04/22 23:05:33 mpowers
* Totally revised DisplayGroupNode so each object gets its own node
* (so the nodes are no longer fixed by index).
*
* Revision 1.1 2001/04/21 23:05:56 mpowers
* Contributing the tree-specific concrete subclass of DisplayGroupNode.
*
*
*/
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