main.java

本程序不仅实现了记事本基本的功能

    }

    private void copy() {

        String str = text.getSelectedText();
        clipboard.setData(str);
    }

    private void paste() {
        String str = clipboard.getData();
        text.replaceRange(str, text.getSelectionStart(), text.getSelectionEnd());
    }

    private void delete() {
        text.replaceRange("", text.getSelectionStart(), text.getSelectionEnd());
    }

    public void actionPerformed(ActionEvent e) {
        try {
            if (e.getSource() == newfile || e.getSource() == newBn) {
                newFile();
            }
            if (e.getSource() == openfile || e.getSource() == openBn) {
                openFile();
            }
            if (e.getSource() == savefile || e.getSource() == saveBn) {
                saveFile();
            }
            if (e.getSource() == saveas || e.getSource() == saveasBn) {
                saveAs();
            }
            if (e.getSource() == exit || e.getSource() == exitBn) {
                exit();
            }
            if (e.getSource() == undoItem || e.getSource() == undoBn || e.getSource() == popundoItem) {
                if (Un_Re.canUndo()) {
                    Un_Re.undo();
                    redoItem.setEnabled(true);
                }
            }
            if (e.getSource() == redoItem || e.getSource() == redoBn || e.getSource() == popredoItem) {
                if (Un_Re.canRedo()) {
                    Un_Re.redo();
                    undoItem.setEnabled(true);
                } else {
                    redoItem.setEnabled(false);
                }
            }
            if (e.getSource() == cutItem || e.getSource() == cutBn || e.getSource() == popcutItem) {
                cut();
            }
            if (e.getSource() == copyItem || e.getSource() == copyBn || e.getSource() == popcopyItem) {
                copy();
            }
            if (e.getSource() == pasteItem || e.getSource() == pasteBn || e.getSource() == poppasteItem) {
                paste();
            }
            if (e.getSource() == deleteItem || e.getSource() == popdeleteItem) {
                delete();
            }
            if (e.getSource() == selectall || e.getSource() == popselectall) {
                text.setSelectionStart(0);
                text.setSelectionEnd(text.getText().length());
            }
            if (e.getSource() == time_date) {
                Date d = new Date();
                String str = DateFormat.getDateTimeInstance().format(d);
                text.replaceRange(str, text.getSelectionStart(), text.getSelectionStart());
            }
            if (e.getSource() == find) {
                new JFindDialog(new Frame(), text);
            }
            if (e.getSource() == replace) {
                new JReplaceDialog(new Frame(), text);
            }
            if (e.getSource() == font) {
                Frame frame = new Frame();
                frame.setBounds(getX() + 30, getY() + 80, 250, 200);
                text.setFont((new FontDialog(frame, "字体选择", true)).showFontDialog());
                newContent = text.getText();
            }
            if (e.getSource() == musicImport) {
                music.openFile();
                addMusicfile(music.file);
            }
            if (e.getSource() == mode[0]) {
                music.int_mode = 0;
            }
            if (e.getSource() == mode[1]) {
                music.int_mode = 1;
            }
            if (e.getSource() == mode[2]) {
                music.int_mode = 2;
            }
            if (e.getSource() == bkcolor) {
                Color rsltColor = JColorChooser.showDialog(this,
                        "颜色选择",
                        this.getBackground());//arg3 是默认颜色
                text.setBackground(rsltColor);
            }
            if (e.getSource() == info) {
                Frame frame = new Frame();
                frame.setBounds(getX() + 30, getY() + 80, 330, 200);
                new Information(frame);
            }


        } catch (IOException ex) {
            Logger.getLogger(JNotepad.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    private void addToolBar() {
        toolbar.setFloatable(true);
        this.add(toolbar, BorderLayout.NORTH);
        toolbar.add(newBn);
        newBn.setToolTipText("新建");
        newBn.addActionListener(this);
        toolbar.add(openBn);
        openBn.setToolTipText("打开");
        openBn.addActionListener(this);
        toolbar.add(saveBn);
        saveBn.setToolTipText("保存");
        saveBn.addActionListener(this);
        toolbar.add(saveasBn);
        saveasBn.setToolTipText("另存为");
        saveasBn.addActionListener(this);
        toolbar.add(exitBn);
        exitBn.setToolTipText("退出");
        exitBn.addActionListener(this);
        toolbar.add(cutBn);
        cutBn.setToolTipText("剪切");
        cutBn.addActionListener(this);
        toolbar.add(copyBn);
        copyBn.setToolTipText("复制");
        copyBn.addActionListener(this);
        toolbar.add(pasteBn);
        pasteBn.setToolTipText("粘贴");
        pasteBn.addActionListener(this);
        toolbar.add(undoBn);
        undoBn.setToolTipText("上一步");
        undoBn.addActionListener(this);
        toolbar.add(redoBn);
        redoBn.setToolTipText("下一步");
        redoBn.addActionListener(this);
    }

    private void addRecentfiles(String filename) {
        int offset;
        if ((offset = recentfileslist.indexOf(filename)) == -1) {
            recentfileslist.insertElementAt(filename, 0);
            if (recentfileslist.size() > nRecentfiles) {
                recentfileslist.removeElementAt(nRecentfiles);
            }

        } else {
            recentfileslist.removeElementAt(offset);
            recentfileslist.insertElementAt(filename, 0);
        }
        buildRecentfiles();
    }

    private void buildRecentfiles() {
        int size = recentfileslist.size();
        recentfiles.removeAll();

        ActionListener menuListener = new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                try {
                    int decision = decide();
                    if (decision == JOptionPane.YES_OPTION) {
                        if (check()) {
                            saveFile();
                        } else {
                            saveAs();
                        }
                    } else if (decision == JOptionPane.CANCEL_OPTION) {
                        return;
                    }
                    text.setText("");
                    String filename = e.getActionCommand();
                    currentFile = new File(filename);
                    BufferedReader reader;

                    reader = new BufferedReader(new FileReader(currentFile));
                    String oneline = null;
                    oldContent =
                            "";
                    do {
                        oneline = reader.readLine();
                        if (oneline != null) {
                            text.append(oneline + "\n"); //text.append(oneline + "\n");
                        }
                    } while (oneline != null);

                    text.setSelectionEnd(0);
                    oldContent =
                            text.getText();
                    String title = currentFile.getName();
                    JNotepad.this.setTitle(title + "-记事本   Time@");
                    addRecentfiles(currentFile.getPath());
                } catch (IOException ex) {
                    Logger.getLogger(JNotepad.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        };

        for (int i = 0; i <
                size; i++) {
            String file = (String) recentfileslist.get(i);
            JMenuItem mi = new JMenuItem(file);
            recentfiles.add(mi);
            mi.addActionListener(menuListener);
        }

    }

    private void addMusicfile(File file) {
        if (file == null) {
            return;
        }
        String fname = file.getName();
        String suffix = fname.substring(fname.lastIndexOf(".") + 1);

        if (!suffix.equals("mp3")) {
            return;
        }
        int offset;
        if ((offset = music.VdirName.indexOf(file.getPath())) == -1) {
            int size = music.VdirName.size();
            music.VfileName.insertElementAt(file.getName(), size - 1);
            music.VdirName.insertElementAt(file.getPath(), size - 1);
        }
        buildMusicfiles(file);
    }

    private void buildMusicfiles(File file) {
        ActionListener musicListener = new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                String filename = e.getActionCommand();
                music.index = music.VfileName.indexOf(filename);
                music.createPlayer2();
            }
        };
        JMenuItem sing = new JMenuItem(file.getName());
        musiclist.add(sing);
        sing.addActionListener(musicListener);
        this.validate();
    }
    private String title;
    private JToolBar toolbar = new JToolBar("工具栏");
    private JButton newBn = new JButton(new ImageIcon("new.gif"));
    private JButton openBn = new JButton(new ImageIcon("open.gif"));
    private JButton saveBn = new JButton(new ImageIcon("save.gif"));
    private JButton saveasBn = new JButton(new ImageIcon("saveas.gif"));
    private JButton exitBn = new JButton(new ImageIcon("exit.gif"));
    private JButton cutBn = new JButton(new ImageIcon("cut.gif"));
    private JButton copyBn = new JButton(new ImageIcon("copy.gif"));
    private JButton pasteBn = new JButton(new ImageIcon("paste.gif"));
    private JButton undoBn = new JButton(new ImageIcon("undo.gif"));
    private JButton redoBn = new JButton(new ImageIcon("redo.gif"));
    private JMenuBar menubar;
    private JMenu menu;
    private JMenuItem newfile;
    private JMenuItem openfile;
    private JMenuItem savefile;
    private JMenuItem saveas;
    private JMenu recentfiles;
    static final int nRecentfiles = 5;
    private Vector recentfileslist = new Vector(nRecentfiles);
    private JMenuItem exit;
    private JPopupMenu popmenu = new JPopupMenu();
    private JMenuItem popundoItem = new JMenuItem("撤销(U)");
    private JMenuItem popredoItem = new JMenuItem("重做(R)");
    private JMenuItem popcutItem = new JMenuItem("剪切(T)");
    private JMenuItem popcopyItem = new JMenuItem("复制(C)");
    private JMenuItem poppasteItem = new JMenuItem("粘贴(P)");
    private JMenuItem popdeleteItem = new JMenuItem("删除(D)");
    private JMenuItem popselectall = new JMenuItem("全选(A)");
    private JMenu edit;
    private JMenuItem undoItem;
    private JMenuItem redoItem;
    private JClipboard clipboard = new JClipboard();
    private JMenuItem cutItem;
    private JMenuItem copyItem;
    private JMenuItem pasteItem;
    private JMenuItem deleteItem;
    private JMenuItem find;
    private JMenuItem replace;
    private JMenuItem selectall;
    private JMenuItem time_date;
    private JMenu style;
    private JCheckBoxMenuItem enter;//自动换行
    private JMenuItem font;
    private JMenu bkmusic;
    private JPanel musicpanel = new JPanel();
    private JMusic music;
    private JMenuItem musicImport = new JMenuItem("添加背景音乐");
    private JMenu musicmode = new JMenu("音乐播放模式");
    private ButtonGroup group = new ButtonGroup();
    private JRadioButtonMenuItem[] mode = new JRadioButtonMenuItem[3];
    private String[] modeValues = {"随机播放", "顺序播放", "单曲循环"};
    private JMenu musiclist = new JMenu("背景音乐列表");
    private JMenuItem bkcolor;
    private JCheckBoxMenuItem drag;
    private UndoManager Un_Re = new UndoManager();
    private JMenu view;
    private JCheckBoxMenuItem tool;
    private JMenu about;
    private JMenuItem info;
    private boolean candrag = true;
    private MyJTextArea text = new MyJTextArea();
    private JScrollPane scroll = new JScrollPane(text);
    String filename = "";
    private File currentFile = new File(filename);
    String oldContent = "";
    String newContent = "";
    private Thread thread = new Thread(this);

    public void run() {
        while (true) {
            Date d = new Date();
            String str = DateFormat.getDateTimeInstance().format(d);
            title =
                    this.getTitle();
            int index = title.lastIndexOf("@");
            title =
                    title.substring(0, index + 1);
            this.setTitle(title + str);
        }
    }

    public void itemStateChanged(ItemEvent e) {
        if (e.getSource() == enter) {
            if (enter.isSelected()) {
                text.setLineWrap(true);
            } else {
                text.setLineWrap(false);
            }
        }
        if (e.getSource() == drag) {
            if (drag.isSelected()) {
                text.candrag = true;
            } else {
                text.candrag = false;
            }
        }
        if (e.getSource() == tool) {
            if (tool.isSelected()) {
                addToolBar();
            } else {
                this.remove(toolbar);
            }
            this.validate();
        }

    }

    private boolean check() {
        String str = "";
        try {
            str = title.substring(0, title.lastIndexOf("-记事本"));
        } catch (Exception e) {
            return false;
        }
        if (str.endsWith("无标题")) {
            return false;
        }
        return true;
    }
}

/**
 *
 * @author Administrator
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new JNotepad();
    // thread.start();
    // TODO code application logic here
    }
}