蜗牛之路

预备知识：
几行代码就可以实现一个窗口：

from tkinter import *

compiler = Tk()
compiler.title("My Editor")
editor = Text()
editor.pack()

compiler.mainloop()

添加菜单后的效果：

from tkinter import *

compiler = Tk()
compiler.title("My Editor")

menu_bar = Menu(compiler)


def run():
	print("run")

file_menu = Menu(menu_bar,tearoff=0)
file_menu.add_command(label='Open',command=run)
menu_bar.add_cascade(labe="File",menu=file_menu)

run_bar = Menu(menu_bar,tearoff=0)
run_bar.add_command(label='Run',command=run)
menu_bar.add_cascade(labe="Run",menu=run_bar)


compiler.config(menu=menu_bar)

editor = Text()
editor.pack()

compiler.mainloop()

一、项目一

（一）成果展示

（二）代码：

from tkinter import *

root = Tk()
root.title("www.snailtoday.com")
# root.iconbitmap("c:/gui/codemy.ico")
root.geometry("500x300")

#Update the listbox
def update(data):
    #clear the listbox
    my_list.delete(0,END)
    #add toppings to listbox
    for item in data:
        my_list.insert(END,item)


#update entry box with listbox clicked
def fillout(e):
    #delete whatever is in the entry box
    my_entry.delete(0,END)
    #ADD clicked list item to entry box
    my_entry.insert(0, my_list.get(ACTIVE))


#create function to check entry vs listbox
def check(e):
    #grab what was typed
    typed = my_entry.get()
    if type == '':
        data = toppings
    else:
        data = []
        for item in toppings:
            if typed.lower() in item.lower():
                data.append(item)
    #upadate our listbox with selected item
    update(data)

#create a label
my_label = Label(root,text="start Typing...",font=("helvetica",14),fg="grey")
my_label.pack(pady=20)

#create an entry box
my_entry = Entry(root,font=("helvetica",20))
my_entry.pack()

#create a list
my_list = Listbox(root,width=50)
my_list.pack(pady=40)

#Create a list
toppings = ["pepperoni","Peppers","Mushrooms","Cheese","Onions","Ham","Taco"]

#add the toppings to our list
update(toppings)

#Create a binding on the listbox onclick
my_list.bind("<<ListboxSelect>>", fillout)


#create a binding on the entry box
my_entry.bind("<KeyRelease>",check)

root.mainloop()

参考：https://pythonguides.com/python-tkinter-autocomplete/

二、项目二
（一）成果展示

（二）代码

from ttkwidgets.autocomplete import AutocompleteCombobox
from tkinter import *

countries = [
        'Antigua and Barbuda', 'Bahamas','Barbados','Belize', 'Canada',
        'Costa Rica ', 'Cuba', 'Dominica', 'Dominican Republic', 'El Salvador ',
        'Grenada', 'Guatemala ', 'Haiti', 'Honduras ', 'Jamaica', 'Mexico',
        'Nicaragua', 'Saint Kitts and Nevis', 'Panama ', 'Saint Lucia', 
        'Saint Vincent and the Grenadines', 'Trinidad and Tobago', 'United States of America'
        ]

ws = Tk()
ws.title('PythonGuides')
ws.geometry('400x300')
ws.config(bg='#8DBF5A')

frame = Frame(ws, bg='#8DBF5A')
frame.pack(expand=True)

Label(
    frame, 
    bg='#8DBF5A',
    font = ('Times',21),
    text='Countries in North America '
    ).pack()

entry = AutocompleteCombobox(
    frame, 
    width=30, 
    font=('Times', 18),
    completevalues=countries
    )
entry.pack()

ws.mainloop()   

三、项目三
（一）成果展示

（二）代码

import tkinter
import os
from tkinter import *
from tkinter.messagebox import *
from tkinter.filedialog import *

class Notepad:

	__root = Tk()

	# default window width and height
	__thisWidth = 300
	__thisHeight = 300
	__thisTextArea = Text(__root)
	__thisMenuBar = Menu(__root)
	__thisFileMenu = Menu(__thisMenuBar, tearoff=0)
	__thisEditMenu = Menu(__thisMenuBar, tearoff=0)
	__thisHelpMenu = Menu(__thisMenuBar, tearoff=0)
	
	# To add scrollbar
	__thisScrollBar = Scrollbar(__thisTextArea)	
	__file = None

	def __init__(self,**kwargs):

		# Set icon
		try:
				self.__root.wm_iconbitmap("Notepad.ico")
		except:
				pass

		# Set window size (the default is 300x300)

		try:
			self.__thisWidth = kwargs['width']
		except KeyError:
			pass

		try:
			self.__thisHeight = kwargs['height']
		except KeyError:
			pass

		# Set the window text
		self.__root.title("Untitled - Notepad")

		# Center the window
		screenWidth = self.__root.winfo_screenwidth()
		screenHeight = self.__root.winfo_screenheight()
	
		# For left-align
		left = (screenWidth / 2) - (self.__thisWidth / 2)
		
		# For right-align
		top = (screenHeight / 2) - (self.__thisHeight /2)
		
		# For top and bottom
		self.__root.geometry('%dx%d+%d+%d' % (self.__thisWidth,
											self.__thisHeight,
											left, top))

		# To make the textarea auto resizable
		self.__root.grid_rowconfigure(0, weight=1)
		self.__root.grid_columnconfigure(0, weight=1)

		# Add controls (widget)
		self.__thisTextArea.grid(sticky = N + E + S + W)
		
		# To open new file
		self.__thisFileMenu.add_command(label="New",
										command=self.__newFile)
		
		# To open a already existing file
		self.__thisFileMenu.add_command(label="Open",
										command=self.__openFile)
		
		# To save current file
		self.__thisFileMenu.add_command(label="Save",
										command=self.__saveFile)

		# To create a line in the dialog	
		self.__thisFileMenu.add_separator()										
		self.__thisFileMenu.add_command(label="Exit",
										command=self.__quitApplication)
		self.__thisMenuBar.add_cascade(label="File",
									menu=self.__thisFileMenu)	
		
		# To give a feature of cut
		self.__thisEditMenu.add_command(label="Cut",
										command=self.__cut)			
	
		# to give a feature of copy
		self.__thisEditMenu.add_command(label="Copy",
										command=self.__copy)		
		
		# To give a feature of paste
		self.__thisEditMenu.add_command(label="Paste",
										command=self.__paste)		
		
		# To give a feature of editing
		self.__thisMenuBar.add_cascade(label="Edit",
									menu=self.__thisEditMenu)	
		
		# To create a feature of description of the notepad
		self.__thisHelpMenu.add_command(label="About Notepad",
										command=self.__showAbout)
		self.__thisMenuBar.add_cascade(label="Help",
									menu=self.__thisHelpMenu)

		self.__root.config(menu=self.__thisMenuBar)

		self.__thisScrollBar.pack(side=RIGHT,fill=Y)				
		
		# Scrollbar will adjust automatically according to the content	
		self.__thisScrollBar.config(command=self.__thisTextArea.yview)	
		self.__thisTextArea.config(yscrollcommand=self.__thisScrollBar.set)
	
		
	def __quitApplication(self):
		self.__root.destroy()
		# exit()

	def __showAbout(self):
		showinfo("Notepad","Mrinal Verma")

	def __openFile(self):
		
		self.__file = askopenfilename(defaultextension=".txt",
									filetypes=[("All Files","*.*"),
										("Text Documents","*.txt")])

		if self.__file == "":
			
			# no file to open
			self.__file = None
		else:
			
			# Try to open the file
			# set the window title
			self.__root.title(os.path.basename(self.__file) + " - Notepad")
			self.__thisTextArea.delete(1.0,END)

			file = open(self.__file,"r")

			self.__thisTextArea.insert(1.0,file.read())

			file.close()

		
	def __newFile(self):
		self.__root.title("Untitled - Notepad")
		self.__file = None
		self.__thisTextArea.delete(1.0,END)

	def __saveFile(self):

		if self.__file == None:
			# Save as new file
			self.__file = asksaveasfilename(initialfile='Untitled.txt',
											defaultextension=".txt",
											filetypes=[("All Files","*.*"),
												("Text Documents","*.txt")])

			if self.__file == "":
				self.__file = None
			else:
				
				# Try to save the file
				file = open(self.__file,"w")
				file.write(self.__thisTextArea.get(1.0,END))
				file.close()
				
				# Change the window title
				self.__root.title(os.path.basename(self.__file) + " - Notepad")
				
			
		else:
			file = open(self.__file,"w")
			file.write(self.__thisTextArea.get(1.0,END))
			file.close()

	def __cut(self):
		self.__thisTextArea.event_generate("<<Cut>>")

	def __copy(self):
		self.__thisTextArea.event_generate("<<Copy>>")

	def __paste(self):
		self.__thisTextArea.event_generate("<<Paste>>")

	def run(self):

		# Run main application
		self.__root.mainloop()




# Run main application
notepad = Notepad(width=600,height=400)
notepad.run()

参考：
https://www.youtube.com/watch?v=iyJ1_ODzNUk
https://www.geeksforgeeks.org/make-notepad-using-tkinter/

四、
https://doc.qt.io/qt-5/qtwidgets-tools-customcompleter-example.html

五、另外一种方案
https://sourceforge.net/projects/npp-python/files/1.2/

不过同样存在这个缺点，它只能自动完成函数，不能自动完成带空格的内容。
python.xml文件要放到C:\Program Files (x86)\Notepad++\plugins\APIs，且不能改名。

六、自己的方案

import sqlite3
from tkinter import *
from tkinter import filedialog
from tkinter import font

root = Tk()
root.title("豆芽写作助手V1.0")
# root.iconbitmap("c:/gui/codemy.ico")
root.geometry("1850x800")

#Set variable for open file name
global open_status_name
open_status_name =False


global selected
selected = False

#create main frame
my_frame = Frame(root)
my_frame.pack(pady=5)


#create sroll bar
text_scroll = Scrollbar(my_frame)
text_scroll.pack(side=RIGHT,fill=Y)


#create text box
my_text = Text(my_frame,width=197, height=16,font=("Helvetica",16),undo=True)
my_text.pack(pady=5)

#configure our scrollbar
text_scroll.config(command = my_text.yview)

# add status bar to bottom of App
status_bar = Label(root,text='Ready     ',anchor=E)
status_bar.pack(fill=X,side=BOTTOM,ipady=5)


#Create New file function
def new_file():
    my_text.delete("1.0",END)
    #update status bars
    root.title("New File - TextPad!")
    status_bar.config(text="New File      ")

    global open_status_name
    open_status_name =False


def open_file():
    #delete previous text
    my_text.delete("1.0",END)
    

    #Grab filename
    text_file = filedialog.askopenfilename(initialdir="C:\gui",title="Open file",filetypes=(("Text Files","*.txt"),("HTML FIles","*.html"),("All Files","*.*")))
    
    #check to see if there is a file name
    if text_file:
        #make filename global,so we can access it later.
        global open_status_name
        open_status_name =text_file

    #update status bars
    name = text_file
    status_bar.config(text=f'{name}   ')
    name = name.replace("H:\\py_project\\编辑器开发","")
    root.title(f'{name}' "- TextPad!")

    #open the file
    text_file = open(text_file,'r')
    stuff = text_file.read()

    my_text.insert(END,stuff)
    #close the opend file
    text_file.close()


def save_as_file():
    text_file = filedialog.asksaveasfilename(defaultextension=".*",initialdir="C:\gui",title="Open file",filetypes=(("Text Files","*.txt"),("HTML FIles","*.html"),("All Files","*.*")))
    if text_file:
        name = text_file
        #update status bars
        status_bar.config(text=f'Saved {name}   ')
        name = name.replace("H:\\py_project\\编辑器开发","")
        root.title(f'{name}' "- TextPad!")

        #save the file
        text_file = open(text_file,"w")
        text_file.write(my_text.get(1.0,END))
        text_file.close()

def save_file():
    global open_status_name
    if open_status_name:
        #save the file
        text_file = open(open_status_name,"w")
        text_file.write(my_text.get(1.0,END))
        text_file.close()  

        status_bar.config(text=f'Saved {open_status_name}   ')  
    else:
        save_as_file()    

def cut_text(e):
    global selected
    if e:
        selected = root.clipboard_get()
    else:
        if my_text.selection_get():
            #grab selected text from text box
            selected = my_text.selection_get()
            #delete selected text from text box
            my_text.delete("sel.first","sel.last")
            #clear the clipboard then append
            root.clipboard_clear()
            root.clipboard_append(selected)

def copy_text(e):
    global selected
    if e:
        selected = root.clipboard_get()
    if my_text.selection_get():    
        #grab selected text from text box
        selected = my_text.selection_get()
        #clear the clipboard then append
        root.clipboard_clear()
        root.clipboard_append(selected)



def paste_text(e):
    global selected
    if e:
        selected = root.clipboard_get()
    else:
        if selected:
            position = my_text.index(INSERT)
            my_text.insert(position,selected)



#create Menu
my_menu = Menu(root)
root.config(menu=my_menu) 

#Add file menu
file_menu = Menu(my_menu,tearoff = False)
my_menu.add_cascade(label="File",menu= file_menu)
file_menu.add_command(label="New",command= new_file)
file_menu.add_command(label="Open",command= open_file)
file_menu.add_command(label="Save",command= save_file)
file_menu.add_command(label="Save As",command= save_as_file)
file_menu.add_separator()
file_menu.add_command(label="Exit",command=root.quit)

#Add edit menu
edit_menu = Menu(my_menu,tearoff = False)
my_menu.add_cascade(label="Edit",menu= edit_menu)
edit_menu.add_command(label="Cut",command= lambda: cut_text(False))
edit_menu.add_command(label="Copy",command= lambda: copy_text(False))
edit_menu.add_command(label="Paste",command= lambda: paste_text(False))
edit_menu.add_separator()
edit_menu.add_command(label="undo",command= my_text.edit_undo)
edit_menu.add_command(label="Redo",command= my_text.edit_redo)


#Update the listbox
def update(data):
    #clear the listbox
    my_list.delete(0,END)
    #add toppings to listbox
    for item in data:
        my_list.insert(END,item)


#update entry box with listbox clicked
def fillout(e):
    #delete whatever is in the entry box
    my_entry.delete(0,END)
    #ADD clicked list item to entry box
    my_entry.insert(0, my_list.get(ACTIVE))


#create function to check entry vs listbox
def check(e):
    #grab what was typed
    typed = my_entry.get()
    if type == '':
        data = toppings
    else:
        data = []
        for item in toppings:
            if typed.lower() in item.lower():
                data.append(item)
    #upadate our listbox with selected item
    update(data)


#create a label
my_label = Label(root,text="Start Typing...",font=("helvetica",14),fg="grey")
my_label.pack(pady=0)


#滚动条组件
sb = Scrollbar(root)
sb.pack(side=RIGHT,fill=Y)


#create an entry box
my_entry = Entry(root,font=("helvetica",20),width=180)
my_entry.pack()

#create a list
my_list = Listbox(root,font=("Arial",16),width=1800,height=20,yscrollcommand=sb.set)
my_list.pack(pady=5,side=LEFT,fill=BOTH)
sb.config(command=my_list.yview)


#Create a list
# toppings = ["pepperoni","Peppers","Mushrooms","Cheese","Onions","Ham","Taco"]
connection = sqlite3.connect('bbc_sentence.db')
cur = connection.cursor()
cur.execute("select content from business_begin")
sqloutput = cur.fetchall()  #This contains the SQL output in format [(u'data1',), (u'data2',), (u'data3',)]
toppings = [item[0] for item in sqloutput]  #This is manipulated to the format [u'data1',u'data2',u'data3']


#add the toppings to our list
update(toppings)

#Create a binding on the listbox onclick
my_list.bind("<<ListboxSelect>>", fillout)


#create a binding on the entry box
my_entry.bind("<KeyRelease>",check)

root.mainloop()