ttree.java

固定资产管理

/*
 *TTree.java主要功能是建立左侧界面中的树状显示界面。
 *该界面包括树状结构和查询按钮。
 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.tree.*;
class Branch {
	DefaultMutableTreeNode r;
	public Branch(String[] data,int cnt,int start) {
		r=new DefaultMutableTreeNode(data[start++]);
		for(int i=0; i<cnt;i++) 
		    r.add(new DefaultMutableTreeNode(data[start++]));
	}
	public DefaultMutableTreeNode node() {
		return r;
	}
}

public class TTree extends JPanel implements ActionListener,TreeSelectionListener {	
	TreeDataModel tdm;
	int i=0;
	int cnt;
	DefaultMutableTreeNode root,child;
	JTree tree;
	public String condition;
	public boolean isleaf;
	public TTree() {
		tdm = new TreeDataModel();
		Container cp=this;
		cp.setLayout(new BorderLayout());
		root=new DefaultMutableTreeNode("类别");
		tree=new JTree(root);
		cp.add(new JScrollPane(tree),BorderLayout.CENTER);
                tree.addTreeSelectionListener(this);
                
		JButton fetch=new JButton("查询类别");
		fetch.addActionListener(this);
		JPanel p=new JPanel();
		p.add(fetch);
		cp.add(p,BorderLayout.SOUTH);
		cp.setVisible(true);
	}
	public void actionPerformed(ActionEvent e) {
		int i=0;
		int j=0;
		int count=0;
		cnt = tdm.selCateCnt();
		int [] scnt = new int[cnt];
		tdm.selSubCateCnt(scnt);
		for (i=0;i<cnt;i++)
		   count+=scnt[i]+1;
		String [] data = new String[count];
		tdm.selCate(data,scnt,cnt);
		i=0;
		j=0;
		root.removeAllChildren();
		while (i<cnt) {
		   child=new Branch(data,scnt[i],j).node();
		   j+=scnt[i]+1;
		   i++;
		   root.add(child);
		}
	}
	public void valueChanged(TreeSelectionEvent e) {
    	   DefaultMutableTreeNode node = (DefaultMutableTreeNode)
                       tree.getLastSelectedPathComponent();
	   if (node == null) return;
	   Object nodeInfo = node.getUserObject();
	   condition = nodeInfo.toString();
	   isleaf = node.isLeaf();
	   Share.condition = condition;
	   Share.isleaf = isleaf;
	}
}