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package org.cristalise.gui;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.DropMode;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.ToolTipManager;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
import org.cristalise.gui.tree.Node;
import org.cristalise.gui.tree.NodeItem;
import org.cristalise.gui.tree.NodeTransferHandler;
import org.cristalise.kernel.lookup.DomainPath;
import org.cristalise.kernel.utils.Logger;
/**
* Container for the tree browser
* @version $Revision: 1.31 $ $Date: 2006/01/17 07:49:44 $
* @author $Author: abranson $
*/
// must put in top level list of loaded items, so we don't have duplicates
public class TreeBrowser extends JPanel implements DomainKeyConsumer
{
private ItemTabManager desktop;
protected JTree tree;
private Node userRoot;
public TreeBrowser(ItemTabManager target, Node userRoot) {
setLayout(new java.awt.BorderLayout());
//record the desktop and node factory for our item frames
this.desktop = target;
this.userRoot = userRoot;
this.setPreferredSize(new Dimension(300, 500));
tree = new JTree(new DefaultTreeModel(userRoot.getTreeNode()));
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setToggleClickCount(3); // need three clicks to expand a branch
tree.addTreeExpansionListener(
new TreeExpansionListener() {
@Override
public void treeCollapsed(TreeExpansionEvent e) {
//REVISIT: possible reaping here if things are getting heavy
}
@Override
public void treeExpanded(TreeExpansionEvent e) {
TreePath p = e.getPath();
// find the clicked tree node
DefaultMutableTreeNode nodeClicked = (DefaultMutableTreeNode)p.getLastPathComponent();
// run the tree builder if it is there.
DefaultMutableTreeNode loadNode = (DefaultMutableTreeNode)nodeClicked.getFirstChild();
if (loadNode.getUserObject() instanceof DynamicTreeBuilder) {
DynamicTreeBuilder loading = (DynamicTreeBuilder)loadNode.getUserObject();
if (loading.state == DynamicTreeBuilder.IDLE) {
loading.buildInfo(tree);
loading.start();
}
}
}
}
);
//Enable tool tips.
ToolTipManager.sharedInstance().registerComponent(tree);
tree.setCellRenderer(new ItemRenderer());
tree.addMouseListener(new TreeMouseListener());
tree.setDragEnabled(true);
tree.setDropMode(DropMode.ON);
tree.setTransferHandler(new NodeTransferHandler(this));
JScrollPane myScrollPane = new JScrollPane(tree);
this.add(myScrollPane);
DefaultMutableTreeNode loadNode = (DefaultMutableTreeNode)userRoot.getTreeNode().getFirstChild();
DynamicTreeBuilder loading = (DynamicTreeBuilder)loadNode.getUserObject();
loading.buildInfo(tree);
loading.start();
}
@Override
public void push(DomainPath target) {
String[] components = target.getPath();
Node currentNode = userRoot;
Object[] treePath = new Object[components.length+1];
treePath[0] = currentNode.getTreeNode();
for (int i=0; i<components.length; i++) {
// create sub-path
String[] newPath = new String[i+1];
for (int j=0; j<newPath.length; j++)
newPath[j] = components[j];
DomainPath nextNodePath = new DomainPath(newPath);
Node nextNode = currentNode.getChildNode(nextNodePath);
if (nextNode == null) {
Logger.msg(6, "TreeBrowser.push() - creating "+nextNodePath);
nextNode = currentNode.newNode(nextNodePath);
currentNode.add(nextNode);
DynamicTreeBuilder builder = currentNode.getTreeBuilder();
builder.buildInfo(tree);
builder.add(nextNode);
}
treePath[i+1] = nextNode.getTreeNode();
currentNode = nextNode;
}
// select it
TreePath targetNode = new TreePath(treePath);
if (Logger.doLog(5)) dumpPath(targetNode, 5);
tree.clearSelection();
tree.addSelectionPath(targetNode);
tree.makeVisible(targetNode);
// open it
if (currentNode instanceof NodeItem) {
desktop.add((NodeItem)currentNode);
}
}
public JTree getTree() {
return tree;
}
@Override
public void push(String name) {
// only interested in real paths
JOptionPane.showMessageDialog(null, "'"+name+"' was not found.",
"No results", JOptionPane.INFORMATION_MESSAGE);
}
public Node getSelectedNode() {
Object selObj = tree.getLastSelectedPathComponent();
if (selObj != null)
try {
DefaultMutableTreeNode nodeClicked = (DefaultMutableTreeNode)selObj;
Object userObject = nodeClicked.getUserObject();
if (userObject instanceof Node) return (Node)userObject;
} catch (Exception ex) { } // Not a node that was clicked on
return null;
}
public Node getNodeAt(Point p) {
TreePath selPath = tree.getPathForLocation(p.x, p.y);
if (selPath != null)
try {
DefaultMutableTreeNode nodeClicked = (DefaultMutableTreeNode)selPath.getLastPathComponent();
Object userObject = nodeClicked.getUserObject();
if (userObject instanceof Node) return (Node)userObject;
}
catch (Exception ex) { } // Not a node that was clicked on
return null;
}
private static void dumpPath(TreePath selPath, int logLevel) {
if (selPath == null) { Logger.msg(logLevel, "TreeBrowser.dumpPath() - selPath null"); return; }
for (int i =0; i<selPath.getPath().length; i++)
Logger.msg(logLevel, "TreeBrowser.dumpPath() - selPath "+i+" = "+selPath.getPath()[i]);
}
private class ItemRenderer extends DefaultTreeCellRenderer {
public ItemRenderer() {
}
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf,
int row, boolean hasFocus) {
super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
Object thisLeaf = ((DefaultMutableTreeNode)value).getUserObject();
if (thisLeaf instanceof DynamicTreeBuilder) {
DynamicTreeBuilder thisLoader = (DynamicTreeBuilder)thisLeaf;
ImageIcon loadGif = thisLoader.getIcon();
setIcon(loadGif);
loadGif.setImageObserver(tree);
setToolTipText("Tree Content Loader");
}
else if (thisLeaf instanceof Node) {
Node thisNode = (Node)thisLeaf;
if (thisNode.getIcon() !=null) setIcon(thisNode.getIcon());
setToolTipText(thisNode.getToolTip());
}
return this;
}
}
private class TreeMouseListener extends MouseAdapter {
@Override
public void mousePressed(MouseEvent e) {
if (e.isPopupTrigger())
showPopup(e);
else {
Object source = getNodeAt(e.getPoint());
if (source == null) return;
if (e.getClickCount() == 2) {
if (source instanceof NodeItem) {
NodeItem thisNode = (NodeItem)source;
desktop.add(thisNode);
}
if (source instanceof DynamicTreeBuilder) {
DynamicTreeBuilder thisLoader = (DynamicTreeBuilder)source;
if (thisLoader.state == DynamicTreeBuilder.PARTIAL)
thisLoader.start();
}
}
}
}
@Override
public void mouseReleased(MouseEvent e) {
if (e.isPopupTrigger()) {
showPopup(e);
}
}
private void showPopup(MouseEvent e) {
Object source = getNodeAt(e.getPoint());
if (source == null) return;
if (source instanceof Node) {
Node thisNode = (Node)source;
thisNode.getPopupMenu().show(e.getComponent(), e.getX(), e.getY());
}
}
}
}
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