一 代码
import tkinterimport tkinter.filedialogimport tkinter.colorchooserimport tkinter.messageboximport tkinter.scrolledtext#创建应用程序窗口app = tkinter.Tk()app.title('My Notepad----by cakin24')app['width']=1000app['height']=800textChanged = tkinter.IntVar()textChanged.set(0)#当前文件名filename =''#创建菜单menu = tkinter.Menu(app)#File菜单submenu = tkinter.Menu(menu, tearoff=0)defOpen():global filename#如果内容已改变，先保存if textChanged.get():yesno = tkinter.messagebox.askyesno(title='保存么?',message='要保存文件吗?')if yesno == tkinter.YES:Save()filename = tkinter.filedialog.askopenfilename(title='打开文件',filetypes=[('Text files','*.txt')])if filename:#清空内容,0.0是lineNumber.Column的表示方法txtContent.delete(0.0, tkinter.END)fp = open(filename,'r')txtContent.insert(tkinter.INSERT,''.join(fp.readlines()))fp.close()#标记为尚无修改textChanged.set(0)#创建Open菜单并绑定菜单时间处理函数submenu.add_command(label='打开', command=Open)defSave():global filename#如果是第一次保存新建文件，则打开“另存为”窗口ifnot filename:SaveAs()#如果内容发生改变，保存elif textChanged.get():fp = open(filename,'w')fp.write(txtContent.get(0.0, tkinter.END))fp.close()textChanged.set(0)submenu.add_command(label='保存', command=Save)defSaveAs():global filename#打开“另存为”窗口newfilename = tkinter.filedialog.asksaveasfilename(title='另存为...',initialdir=r'c:\\',initialfile='新文件.txt')#如果指定了文件名，则保存文件if newfilename:fp = open(newfilename,'w')fp.write(txtContent.get(0.0, tkinter.END))fp.close()filename = newfilenametextChanged.set(0)submenu.add_command(label='另存为', command=SaveAs)#添加分割线submenu.add_separator()defClose():global filenameSave()txtContent.delete(0.0, tkinter.END)#置空文件名filename =''submenu.add_command(label='关闭', command=Close)#将子菜单关联到主菜单上menu.add_cascade(label='文件', menu=submenu)#Edit菜单submenu = tkinter.Menu(menu, tearoff=0)#撤销最后一次操作defUndo():#启用undo标志txtContent['undo']=Truetry:txtContent.edit_undo()exceptExceptionas e:passsubmenu.add_command(label='Undo', command=Undo)defRedo():txtContent['undo']=Truetry:txtContent.edit_redo()exceptExceptionas e:passsubmenu.add_command(label='Redo', command=Redo)submenu.add_separator()defCopy():txtContent.clipboard_clear()txtContent.clipboard_append(txtContent.selection_get())submenu.add_command(label='拷贝', command=Copy)defCut():Copy()#删除所选内容txtContent.delete(tkinter.SEL_FIRST, tkinter.SEL_LAST)submenu.add_command(label='剪切', command=Cut)defPaste():#如果没有选中内容，则直接粘贴到鼠标位置#如果有所选内容，则先删除再粘贴try:txtContent.insert(tkinter.SEL_FIRST, txtContent.clipboard_get())txtContent.delete(tkinter.SEL_FIRST, tkinter.SEL_LAST)#如果粘贴成功就结束本函数，以免异常处理结构执行完成之后再次粘贴returnexceptExceptionas e:passtxtContent.insert(tkinter.INSERT, txtContent.clipboard_get())submenu.add_command(label='粘贴', command=Paste)submenu.add_separator()defSearch():#获取要查找的内容textToSearch = tkinter.simpledialog.askstring(title='Search',prompt='What to search?')start = txtContent.search(textToSearch,0.0, tkinter.END)if start:tkinter.messagebox.showinfo(title='Found', message='Ok')#tkinter.SEL_FIRST = start#tkinter.SEL_LAST = startsubmenu.add_command(label='查找', command=Search)menu.add_cascade(label='编辑', menu=submenu)#Help菜单submenu = tkinter.Menu(menu, tearoff=0)defAbout():tkinter.messagebox.showinfo(title='关于', message='作者:cakin24')submenu.add_command(label='关于', command=About)menu.add_cascade(label='帮助', menu=submenu)#将创建的菜单关联到应用程序窗口app.config(menu=menu)#创建文本编辑组件txtContent = tkinter.scrolledtext.ScrolledText(app, wrap=tkinter.WORD)txtContent.pack(fill=tkinter.BOTH, expand=tkinter.YES)defKeyPress(event):textChanged.set(1)txtContent.bind('<KeyPress>',KeyPress)app.mainloop()
二 运行结果
