shortcuttreenode.java

来自「JavaExplorer是一个独立于平台的浏览器」· Java 代码 · 共 198 行

/**
  * File and FTP Explorer
  * Copyright 2002
  * BOESCH Vincent
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program 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 General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
package javaexplorer.gui.treenode.shortcut;

import java.util.Enumeration;
import java.util.Vector;

import javaexplorer.util.shortcut.*;

import javax.swing.tree.TreeNode;


public class ShortcutTreeNode implements TreeNode {
    private ShortcutTreeNode _parent;
    private Shortcut _shortcut;

    /**
     *  Constructeur objet ShortcutTreeNode
     */
    public ShortcutTreeNode() {
    }

    /**
     *  Constructor for the JFileTreeNode object
     *
     *@param  shortcut      Description of
     *      the Parameter
     */
    public ShortcutTreeNode(Shortcut shortcut) {
        super();
        setShortcut(shortcut);
    }

    /**
     *  Constructeur objet ShortcutTreeNode
     *
     *@param  shortcut  Description of the
     *      Parameter
     *@param  parent    Description of the
     *      Parameter
     */
    public ShortcutTreeNode(Shortcut shortcut, ShortcutTreeNode parent) {
        super();
        setShortcut(shortcut);
        _parent = parent;
    }

    /**
     *@return    Description of the Return
     *      Value
     */
    public Enumeration children() {
        if (!(_shortcut instanceof ShortcutContainer)) {
            return null;
        }

        Shortcut[] tb_shortcut = ((ShortcutContainer) _shortcut).getShortcuts();

        if (tb_shortcut == null) {
            return null;
        }

        Vector v = new Vector(5, 5);

        for (int i = 0; i < tb_shortcut.length; i++) {
            v.addElement(new ShortcutTreeNode(tb_shortcut[i]));
        }

        return v.elements();
    }

    /**
     *  Gets the allowsChildren attribute of
     *  the ShortcutTreeNode object
     *
     *@return    The allowsChildren value
     */
    public boolean getAllowsChildren() {
        return (_shortcut instanceof ShortcutContainer);
    }

    /**
     *  Gets the childAt attribute of the ShortcutTreeNode
     *  object
     *
     *@param  index  Description of the Parameter
     *@return        The childAt value
     */
    public TreeNode getChildAt(int index) {
        if ((index < 0) || (index > getChildCount())) {
            return null;
        }

        return new ShortcutTreeNode(((ShortcutContainer) _shortcut).getShortcutAt(
                index), this);
    }

    /**
     *  Gets the childCount attribute of the
     *  ShortcutTreeNode object
     *
     *@return    The childCount value
     */
    public int getChildCount() {
        if (isLeaf()) {
            return 0;
        }

        return ((ShortcutContainer) _shortcut).getChildCount();
    }

    /**
     *  Gets the index attribute of the ShortcutTreeNode
     *  object
     *
     *@param  tn  Description of the Parameter
     *@return     The index value
     */
    public int getIndex(TreeNode tn) {
        if (!(tn instanceof ShortcutTreeNode)) {
            return -1;
        }

        if (isLeaf()) {
            return -1;
        }

        Shortcut sc = ((ShortcutTreeNode) tn).getShortcut();

        return ((ShortcutContainer) _shortcut).getShortcutIndex(sc.getTitle());
    }

    /**
     *  Gets the parent attribute of the ShortcutTreeNode
     *  object
     *
     *@return    The parent value
     */
    public TreeNode getParent() {
        return _parent;
    }

    /**
     *  Gets the shortcut attribute of the
     *  ShortcutTreeNode object
     *
     *@return    The shortcut value
     */
    public Shortcut getShortcut() {
        return _shortcut;
    }

    /**
     *  Gets the leaf attribute of the ShortcutTreeNode
     *  object
     *
     *@return    The leaf value
     */
    public boolean isLeaf() {
        return (!(_shortcut instanceof ShortcutContainer));
    }

    /**
     *  Sets the shortcut attribute of the
     *  ShortcutTreeNode object
     *
     *@param  shortcut  The new shortcut value
     */
    public void setShortcut(Shortcut shortcut) {
        _shortcut = shortcut;
    }

    /**
     *@return    Description of the Return
     *      Value
     */
    public String toString() {
        return _shortcut.getTitle();
    }
}