JAVA记事本(4)

//系统剪贴板

Toolkit toolkit=Toolkit.getDefaultToolkit(); Clipboard clipBoard=toolkit.getSystemClipboard(); //创建撤销操作管理器(与撤销操作有关) protected UndoManager undo=new UndoManager();

protected UndoableEditListener undoHandler=new UndoHandler(); //其他变量

String oldValue;//存放编辑区原来的内容，用于比较文本是否有改动 boolean isNewFile=true;//是否新文件(未保存过的) File currentFile;//当前文件名 //构造函数开始 public Notepad() {

super(\记事本\//改变系统默认字体

Font font = new Font(\

java.util.Enumeration keys = UIManager.getDefaults().keys(); while (keys.hasMoreElements()) { }

//创建菜单条

JMenuBar menuBar=new JMenuBar(); //创建文件菜单及菜单项并注册事件监听 fileMenu=new JMenu(\文件(F)\

fileMenu.setMnemonic('F');//设置快捷键ALT+F

Object key = keys.nextElement(); Object value = UIManager.get(key);

if (value instanceof javax.swing.plaf.FontUIResource) { }

UIManager.put(key, font);

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fileMenu_New=new JMenuItem(\新建(N)\

fileMenu_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputE

vent.CTRL_MASK));

fileMenu_New.addActionListener(this); fileMenu_Open=new JMenuItem(\打开(O)...\

fileMenu_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,Input

Event.CTRL_MASK));

fileMenu_Open.addActionListener(this); fileMenu_Save=new JMenuItem(\保存(S)\

fileMenu_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputE

vent.CTRL_MASK));

fileMenu_Save.addActionListener(this);

fileMenu_SaveAs=new JMenuItem(\另存为(A)...\fileMenu_SaveAs.addActionListener(this);

fileMenu_PageSetUp=new JMenuItem(\页面设置(U)...\fileMenu_PageSetUp.addActionListener(this); fileMenu_Print=new JMenuItem(\打印(P)...\

fileMenu_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,

InputEvent.CTRL_MASK));

fileMenu_Print.addActionListener(this); fileMenu_Exit=new JMenuItem(\退出(X)\fileMenu_Exit.addActionListener(this);

//创建编辑菜单及菜单项并注册事件监听

editMenu=new JMenu(\编辑(E)\

editMenu.setMnemonic('E');//设置快捷键ALT+E

//当选择编辑菜单时，设置剪切、复制、粘贴、删除等功能的可用性 editMenu.addMenuListener(new MenuListener() {

public void menuCanceled(MenuEvent e)//取消菜单时调用

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{ checkMenuItemEnabled();//设置剪切、复制、粘贴、删除等功能

的可用性

}

public void menuDeselected(MenuEvent e)//取消选择某个菜单时调用

{

checkMenuItemEnabled();//设置剪切、复制、粘贴、删除等功能

的可用性

}

public void menuSelected(MenuEvent e)//选择某个菜单时调用 {

checkMenuItemEnabled();//设置剪切、复制、粘贴、删除等功能

的可用性

});

editMenu_Undo=new JMenuItem(\撤销(U)\

}

editMenu_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,Input

Event.CTRL_MASK));

editMenu_Undo.addActionListener(this); editMenu_Undo.setEnabled(false); editMenu_Cut=new JMenuItem(\剪切(T)\

editMenu_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEv

ent.CTRL_MASK));

editMenu_Cut.addActionListener(this); editMenu_Copy=new JMenuItem(\复制(C)\

editMenu_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,Input

Event.CTRL_MASK));

editMenu_Copy.addActionListener(this); editMenu_Paste=new JMenuItem(\粘贴(P)\

editMenu_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,Input

Event.CTRL_MASK));

editMenu_Paste.addActionListener(this);

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editMenu_Delete=new JMenuItem(\删除(D)\

editMenu_Delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELE

TE,0));

editMenu_Find.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputE

editMenu_Delete.addActionListener(this); editMenu_Find=new JMenuItem(\查找(F)...\

vent.CTRL_ MASK)); ));

editMenu_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H,

editMenu_FindNext.addActionListener(this);

editMenu_Replace = new JMenuItem(\替换(R)...\

editMenu_FindNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0

editMenu_Find.addActionListener(this);

editMenu_FindNext=new JMenuItem(\查找下一个(N)\

InputEvent.CTRL_MASK));

editMenu_Replace.addActionListener(this);

editMenu_GoTo = new JMenuItem(\转到(G)...\

editMenu_GoTo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G,

InputEvent.CTRL_MASK));

editMenu_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,

editMenu_GoTo.addActionListener(this);

editMenu_SelectAll = new JMenuItem(\全选\

InputEvent.CTRL_MASK));

editMenu_SelectAll.addActionListener(this);

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0));

editMenu_TimeDate = new JMenuItem(\时间/日期(D)\

editMenu_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,

editMenu_TimeDate.addActionListener(this);

//创建格式菜单及菜单项并注册事件监听 formatMenu=new JMenu(\格式(O)\

formatMenu.setMnemonic('O');//设置快捷键ALT+O

formatMenu_LineWrap=new JCheckBoxMenuItem(\自动换行(W)\formatMenu_LineWrap.setMnemonic('W');//设置快捷键ALT+W formatMenu_LineWrap.setState(true);

formatMenu_LineWrap.addActionListener(this); formatMenu_Font=new JMenuItem(\字体(F)...\formatMenu_Font.addActionListener(this); //创建查看菜单及菜单项并注册事件监听 viewMenu=new JMenu(\查看(V)\

viewMenu.setMnemonic('V');//设置快捷键ALT+V viewMenu_Status=new JCheckBoxMenuItem(\状态栏(S)\viewMenu_Status.setMnemonic('S');//设置快捷键ALT+S viewMenu_Status.setState(true);

viewMenu_Status.addActionListener(this); //创建帮助菜单及菜单项并注册事件监听 helpMenu = new JMenu(\帮助(H)\

helpMenu.setMnemonic('H');//设置快捷键ALT+H helpMenu_HelpTopics = new JMenuItem(\帮助主题(H)\

helpMenu_HelpTopics.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F

1,0));

helpMenu_HelpTopics.addActionListener(this);

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