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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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