128 lines
3.2 KiB
Java
128 lines
3.2 KiB
Java
/*
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*
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* Copyright (C) 2003 Kent Hansen.
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*
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* This file is part of Tile Mangler.
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*
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* Tile Mangler is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Tile Mangler is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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package tm.treenodes;
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import java.util.Enumeration;
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import javax.swing.*;
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import javax.swing.tree.*;
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import java.awt.*;
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/**
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*
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* A tree for showing treenodes.
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*
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**/
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public class TMTreeNodeTree extends JTree {
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/**
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*
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*
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*
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**/
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public TMTreeNodeTree() {
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super();
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getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
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setShowsRootHandles(true);
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}
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/**
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*
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* Loads the tree with root <code>rootNode</code>.
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* @param loadLeaves If true, all nodes are loaded; if false, only internal nodes.
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*
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**/
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public void loadTreeNodes(TMTreeNode rootNode, boolean loadLeaves) {
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if (loadLeaves) {
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setModel(new DefaultTreeModel(rootNode));
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}
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else {
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setModel(new FolderTreeModel(rootNode));
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}
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// model.addTreeModelListener(this);
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}
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/**
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*
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* Gets the selected node.
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* If there is no selected node, the root is returned as default.
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*
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**/
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public TMTreeNode getSelectedNode() {
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TMTreeNode n = (TMTreeNode)getLastSelectedPathComponent();
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if (n != null) return n;
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return (TMTreeNode)getModel().getRoot();
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}
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/**
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*
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* Expands the specified node.
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*
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**/
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public void expandNode(DefaultMutableTreeNode node) {
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setExpandedState(new TreePath(node.getPath()), true);
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}
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/**
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*
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*
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*
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**/
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private class FolderTreeModel extends DefaultTreeModel {
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private DefaultMutableTreeNode mRoot;
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FolderTreeModel(DefaultMutableTreeNode root) {
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super(root);
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mRoot= root;
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}
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public Object getChild(Object parent, int index) {
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DefaultMutableTreeNode node = (DefaultMutableTreeNode)parent;
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int pos = 0;
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for (int i=0, cnt=0; i<node.getChildCount(); i++) {
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if (node.getChildAt(i) instanceof FolderNode) {
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if (cnt++ == index) {
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pos = i;
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break;
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}
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}
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}
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return node.getChildAt(pos);
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}
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public int getChildCount(Object parent) {
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DefaultMutableTreeNode node = (DefaultMutableTreeNode)parent;
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int childCount = 0;
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Enumeration children = node.children();
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while (children.hasMoreElements()) {
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if (children.nextElement() instanceof FolderNode) {
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childCount++;
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}
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}
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return childCount;
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}
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}
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} |