📄 notepad_tree.java
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package com.edu.sccp.snail.notepad.view;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.File;
import java.util.Enumeration;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTree;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.filechooser.FileSystemView;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
public class Notepad_Tree extends JTree implements TreeExpansionListener, TreeSelectionListener, MouseListener{
private static final long serialVersionUID = 1L;
DefaultTreeModel treeModel;
FileSystemView fileView;
FileRoot root;
File right_Click_file = null;
Notepad_Main parent_frame = null;
JPopupMenu pm = null; // 弹出菜单
JMenuItem newfile = null, openfile = null, copy = null, paste = null, cut = null, per = null,
refresh = null, find = null, change = null; // 右键功能菜单
public Notepad_Tree(Notepad_Main parent){
this.parent_frame = parent; //
Font myFont = new Font("宋体", 11, 12);
fileView = FileSystemView.getFileSystemView();
root = new FileRoot(fileView.getRoots()[0]);
root.Child();
pm = getJPopuMenu(); //右键菜单的初始化
treeModel = new DefaultTreeModel(root);
this.setModel(treeModel);
this.addTreeExpansionListener(this);//树扩展或折叠某一节点时获得通知的侦听器
this.addTreeSelectionListener(this);//对 TreeSelection 事件的侦听器。
this.setCellRenderer(new SetInco());
this.setFont(myFont);
this.setRootVisible(true);
this.setRowHeight(18);
this.addMouseListener(this);
}
/**
* 得到一个右键菜单
* @author 小豆包
* @time 08/1/8
*/
/**
* 得到右键菜单
* @return PopupMenu
* @author 小豆包
* @time 08/1/4
*/
public JPopupMenu getJPopuMenu() {
JPopupMenu pm1 = new JPopupMenu();
pm1.add(newfile = new JMenuItem("新建"));
pm1.add(openfile = new JMenuItem("打开"));
pm1.addSeparator();
pm1.add(refresh = new JMenuItem("刷新"));
pm1.addSeparator();
pm1.add(cut = new JMenuItem("剪切"));
pm1.add(copy = new JMenuItem("复制"));
pm1.add(paste = new JMenuItem("粘贴"));
pm1.addSeparator();
pm1.add(find = new JMenuItem("查找"));
pm1.add(change = new JMenuItem("替换"));
pm1.addSeparator();
pm1.add(per = new JMenuItem("属性"));
newfile.setAccelerator(KeyStroke.getKeyStroke('N', InputEvent.CTRL_MASK));
openfile.setAccelerator(KeyStroke.getKeyStroke('O', InputEvent.CTRL_MASK));
copy.setAccelerator(KeyStroke.getKeyStroke('C', InputEvent.CTRL_MASK));
paste.setAccelerator(KeyStroke.getKeyStroke('V', InputEvent.CTRL_MASK));
cut.setAccelerator(KeyStroke.getKeyStroke('X', InputEvent.CTRL_MASK));
find.setAccelerator(KeyStroke.getKeyStroke('F', InputEvent.SHIFT_MASK));
change.setAccelerator(KeyStroke
.getKeyStroke('C', InputEvent.SHIFT_MASK));
refresh.setAccelerator(KeyStroke.getKeyStroke('R',
InputEvent.SHIFT_MASK));
per.setAccelerator(KeyStroke.getKeyStroke('P', InputEvent.ALT_MASK));
newfile.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
/**
* 处理事件
*/
new Notepad_TreeNewFile(parent_frame,right_Click_file);
}
});
openfile.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
/**
* 处理事件
*/
new Notepad_TreeOpenFile(parent_frame,right_Click_file);
}
});
copy.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
/**
* 处理事件
*/
}
});
paste.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
/**
* 处理代码
*/
}
});
cut.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
/**
* 处理代码
*/
}
});
return pm1;
}
/**
* TreeCellRenderer
* 定义针对显示树节点的对象的要求
*/
class SetInco extends JPanel implements TreeCellRenderer{
private static final long serialVersionUID = 1L;
JLabel label = new JLabel();
public SetInco(){
this.setLayout(null);
this.add(label);
label.setBackground(UIManager.getColor("Tree.textBackground"));
this.setBackground(UIManager.getColor("Tree.textBackground"));
}
//Dimension 类封装单个对象中组件的宽度和高度（精确到整数）。
public Dimension getPreferredSize(){
Dimension labelDimension = label.getPreferredSize();
return new Dimension(labelDimension.width,
labelDimension.height);
}
//是一个具有图形表示能力的对象，可在屏幕上显示，并可与用户进行交互
public Component getTreeCellRendererComponent(JTree tree,Object value, boolean selected,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus){
String stringValue = tree.convertValueToText(value, selected, expanded, leaf,
row, hasFocus);
setEnabled(tree.isEnabled());
label.setFont(tree.getFont());
// checkBox.setSelected( ( (FileRoot) value).Selection());
//设置图标为系统的文件类型图标
FileSystemView fileSystemView = FileSystemView.getFileSystemView();
label.setIcon(fileSystemView.getSystemIcon( ( (FileRoot) value).getFile()));
label.setText(stringValue);
return this;
}
public void doLayout() {
Dimension labelDimension = label.getPreferredSize();
int labelY = 0;
label.setLocation(0,labelY);
label.setBounds(0, labelY, labelDimension.width,
labelDimension.height);
}
}
// 每当树中的一个项被折叠时调用
public void treeCollapsed(TreeExpansionEvent arg0) {
}
//每当树中的一个项被扩展时调用
public void treeExpanded(TreeExpansionEvent e) {
this.setCursor(new Cursor(Cursor.WAIT_CURSOR));//Cursor 是一个封装鼠标光标的位图表示形式的类
TreePath path = e.getPath(); //表示节点的路径
FileRoot fileroot = (FileRoot)path.getLastPathComponent();//返回此路径的最后一个组件
fileroot.Child();
/**
* nodeStructureChanged 方法：
* 如果完全更改了节点的子节点、子节点的子节点、依此类推，则调用此方法。
*调用此方法将发布 treeStructureChanged 事件
*/
treeModel.nodeStructureChanged(fileroot);
this.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
}
//当 TreeSelectionModel 中的选择发生更改时调用
public void valueChanged(TreeSelectionEvent arg0) {
String filePath = "";
Object object = this.getLastSelectedPathComponent();//返回当前选择的第一个节点中的最后一个路径组件。
if(object != null){
filePath = ((File)(((DefaultMutableTreeNode)(object)).getUserObject())).getPath();
}
}
public void mouseClicked(MouseEvent e) {
FileRoot node = null;
TreePath path = null;
String str = "";
int count = e.getClickCount();
if (count != 1) {
//System.out.println(count);
}
else {
int x = e.getX();
int y = e.getY();
int row = this.getRowForLocation(x, y);
path = this.getPathForRow(row);
if (path != null) {
node = (FileRoot) path.getLastPathComponent();
if(node.isLeaf())
{
File file = node.getFile();
/**
* 传过去创建一个新的文件 然后加到主窗体中
*/
new Notepad_TreeOpenFile(parent_frame,file);
}
else
{ boolean isSelected = ! (node.Selection());
node.setSelected(isSelected);
( (DefaultTreeModel)this.getModel()).nodeChanged(node);
}
}
}
}
public void mouseEntered(MouseEvent arg0) {
}
public void mouseExited(MouseEvent arg0) {
}
public void mousePressed(MouseEvent e) {
/**
* 右键菜单处理
*/
Component parent = e.getComponent();
//////////////////////////////////////////////////////////////////////////////////
FileRoot node = null;
TreePath path = null;
int x1 = e.getX();
int y1 = e.getY();
int row = this.getRowForLocation(x1, y1);
path = this.getPathForRow(row);
if (path != null) {
node = (FileRoot) path.getLastPathComponent();
if(node.isLeaf())
{
right_Click_file = node.getFile();
}}
//////////////////////////////////////////////////////////////////////////////////
if (e.getButton() == MouseEvent.BUTTON3) {
int x = e.getX();
int y = e.getY(); // 获得鼠标在父组件上的坐标
Dimension parentSize = parent.getSize(); // 返回父组件的大小
Dimension d = pm.getSize();
y = ((parentSize.height - y) - d.height) > 0 ? y
: (parentSize.height - d.height); // 如果坐标显示不开 则自动定位
x = ((parentSize.width - x) - d.width) > 0 ? x
: (parentSize.width - d.width);
pm.show(parent, x, y);
}
}
public void mouseReleased(MouseEvent arg0) {
}
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
//文件节点类
class FileRoot extends DefaultMutableTreeNode{
boolean isExpanded = false;//不展开路径标识的节点
boolean isSelection = false;//该选择当前不为空
public FileRoot(File files){
this(files,false);
}
public FileRoot(File files, boolean b) {
super(files);
this.isSelection= b;
}
public boolean Selection(){
return isSelection;
}
public void setExplored(boolean b) {
isExpanded = b;
}
public boolean Expanded(){
return isExpanded;
}
public boolean isDirectory() {
return getFile().isDirectory();
}
public File getFile(){
return (File) getUserObject();
}
public boolean isLeaf() {
return !isDirectory();
}
public boolean getAllowsChildren() {
return isDirectory();
}
public void setSelected(boolean isSelection) {
this.isSelection = isSelection;
if (children != null) {
Enumeration enum = children.elements();
while (enum.hasMoreElements()) {
FileRoot node = (FileRoot) enum.nextElement();
node.setSelected(isSelection);
}
}
}
public void Child(){
if (!Expanded()) {
File file = getFile();
File[] children = file.listFiles();
// String[] children =file.list(new FilenameFilter(){
// public boolean accept(File dir,String n){
//String f =file.getName();
// return true;
// }
// });
if (children == null || children.length == 0)
return;
for (int i = 0; i < children.length; ++i) {
File f = children[i];
add(new FileRoot(f, isSelection));
}
isExpanded = true;
}
}
public String toString() {
File file = (File) getUserObject();
String filename = file.toString();
int index = filename.lastIndexOf(File.separator);
return (index != -1 && index != filename.length() - 1)? filename.substring(index + 1) : filename;
}
}
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