這是我的代碼
from Tkinter import *
主視窗
App = Tk()
App.title("Converter")
App.geometry('360x180')
選單
kind = ['Temperature', 'Length', 'Weight']
all = StringVar()
all_menu = OptionMenu(App, all, *kind)
all_menu.grid(row=0, column=1, pady=5)
獲取索引
index = all.get()
if index == 'Temperature' :
scales = ['Fahrenheit','Celsius']
elif index == 'Length' :
scales = ['Mile','Kilometer']
else:
scales = ['Pound','Kilogram']
用于轉換的長度比例
_from = StringVar()
from_menu = OptionMenu(App, _from, *scales)
from_menu.grid(row=1, column=1, pady=5)
在標簽之間
lbl = Label(App, text=' convert to ')
lbl.grid(row=1, column=2, pady=5)
要將值轉換為的長度比例
to_ = StringVar()
to_menu = OptionMenu(App, to_, *scales)
to_menu.grid(row=1, column=3, pady=5)
入境預標簽
numL = Label(App, text='Enter: ')
numL.grid(row=2, column=0, columnspan=1, pady=5)
輸入欄位
numE = Entry(App)
numE.grid(row=2, column=1, columnspan=1, pady=5)
在輸入欄位和轉換器功能之間
equal = Label(App, text=' = ')
equal.grid(row=2, column=2, pady=5)
轉換器溫度功能
def Convert_Temperature():
froM = _from.get()
tO = to_.get()
num = int(numE.get())
if froM == 'Fahrenheit' and tO == 'Celsius':
converted_num = (num - 32) * 5 / 9
elif froM == 'Celsius' and tO == 'Fahrenheit':
converted_num = (num * 9 / 5) 32
else:
converted_num = num
conv_numL = Label(App, text=round(converted_num, 4), width=10)
conv_numL.grid(row=2, column=3, pady=5)
轉換器長度功能
def Convert_Length():
froM = _from.get()
tO = to_.get()
num = int(numE.get())
if froM == 'Mile' and tO == 'Kilometer':
converted_num = num * 1.609
elif froM == 'Kilometer' and tO == 'Mile':
converted_num = num / 1.609
else:
converted_num = num
conv_numL = Label(App, text=round(converted_num, 4), width=10)
conv_numL.grid(row=2, column=3, pady=5)
轉換器權重功能
def Convert_Weight():
froM = _from.get()
tO = to_.get()
num = int(numE.get())
if froM == 'Pound' and tO == 'Kilogram':
converted_num = num / 2.205
elif froM == 'Kilogram' and tO == 'Pound':
converted_num = num * 2.205
else:
converted_num = num
conv_numL = Label(App, text=round(converted_num, 4), width=10)
conv_numL.grid(row=2, column=3, pady=5)
轉換按鈕
if index == 'Temperature':
conB = Button(App, text='Convert', command=Convert_Temperature)
elif index == 'Length':
conB = Button(App, text='Convert', command=Convert_Length)
else:
conB = Button(App, text='Convert', command=Convert_Weight)
conB.grid(row=3, column=1, pady=5)
清除文本功能
def clear_text():
numE.delete(0, END)
_from.set("")
to_.set("")
conv_numL = Label(App, text="", width=10)
conv_numL.grid(row=2, column=3, pady=5)
清除文本按鈕
btn = Button(App, text="Restart", command=clear_text)
btn.grid(row=3, column=3, pady=5)
App.mainloop()
完整代碼
from tkinter import *
# Main window
App = Tk()
App.title("Converter")
App.geometry('360x180')
# Menu
kind = ['Temperature', 'Length', 'Weight']
all = StringVar()
all_menu = OptionMenu(App, all, *kind)
all_menu.grid(row=0, column=1, pady=5)
# Get index
index = all.get()
if index == 'Temperature' :
scalesa = ['Fahrenheit','Celsius']
elif index == 'weight' :
scalesa = ['Pound','Kilogram']
else:
scalesa = ['Mile','Kilometer']
# The scale of the length to be used for conversion
_from = StringVar()
from_menu = OptionMenu(App, _from, *scalesa)
from_menu.grid(row=1, column=1, pady=5)
# In between label
lbl = Label(App, text=' convert to ')
lbl.grid(row=1, column=2, pady=5)
# The scale of the length to convert the value to
to_ = StringVar()
to_menu = OptionMenu(App, to_, *scalesa)
to_menu.grid(row=1, column=3, pady=5)
# Entry pre-label
numL = Label(App, text='Enter: ')
numL.grid(row=2, column=0, columnspan=1, pady=5)
# Entry field
numE = Entry(App)
numE.grid(row=2, column=1, columnspan=1, pady=5)
# In between Entry field and Converter function
equal = Label(App, text=' = ')
equal.grid(row=2, column=2, pady=5)
# Converter temperature function
def Convert_Temperature():
froM = _from.get()
tO = to_.get()
num = int(numE.get())
if froM == 'Fahrenheit' and tO == 'Celsius':
converted_num = (num - 32) * 5 / 9
elif froM == 'Celsius' and tO == 'Fahrenheit':
converted_num = (num * 9 / 5) 32
else:
converted_num = num
conv_numL = Label(App, text=round(converted_num, 4), width=10)
conv_numL.grid(row=2, column=3, pady=5)
# Converter length function
def Convert_Length():
froM = _from.get()
tO = to_.get()
num = int(numE.get())
if froM == 'Mile' and tO == 'Kilometer':
converted_num = num * 1.609
elif froM == 'Kilometer' and tO == 'Mile':
converted_num = num / 1.609
else:
converted_num = num
conv_numL = Label(App, text=round(converted_num, 4), width=10)
conv_numL.grid(row=2, column=3, pady=5)
# Converter weight function
def Convert_Weight():
froM = _from.get()
tO = to_.get()
num = int(numE.get())
if froM == 'Pound' and tO == 'Kilogram':
converted_num = num / 2.205
elif froM == 'Kilogram' and tO == 'Pound':
converted_num = num * 2.205
else:
converted_num = num
conv_numL = Label(App, text=round(converted_num, 4), width=10)
conv_numL.grid(row=2, column=3, pady=5)
# Convert button
if index == 'Temperature':
conB = Button(App, text='Convert', command=Convert_Temperature)
elif index == 'Length':
conB = Button(App, text='Convert', command=Convert_Length)
else:
conB = Button(App, text='Convert', command=Convert_Weight)
conB.grid(row=3, column=1, pady=5)
# Clear text function
def clear_text():
numE.delete(0, END)
_from.set("")
to_.set("")
conv_numL = Label(App, text="", width=10)
conv_numL.grid(row=2, column=3, pady=5)
# Clear text button
btn = Button(App, text="Restart", command=clear_text)
btn.grid(row=3, column=3, pady=5)
App.mainloop()
# Label -> print text
# Grid -> Locate
# Entry -> table
uj5u.com熱心網友回復：
你需要了解事件驅動編程這tkinter是基于。
您需要更新一個函式的from_menu和to_menu內部的選項，該函式在all_menu更改選擇時觸發。它可以通過使用command選項來完成OptionMenu。
您還需要根據 的選擇呼叫相應的轉換all_menu，from_menu并to_menu在通過單擊Convert按鈕觸發的函式內呼叫。
下面是修改后的代碼：
from tkinter import *
# Main window
App = Tk()
App.title("Converter")
App.geometry('450x180')
def update_menu(optmenu, optvar, options):
menu = optmenu['menu']
# clear current options
menu.delete(0, 'end')
# populate new options
for item in options:
menu.add_command(label=item, command=lambda value=item: optvar.set(value))
# reset selection
optvar.set('')
def update_conversion_menus(index):
if index == 'Temperature' :
scalesa = ['Fahrenheit','Celsius']
elif index == 'Weight' :
scalesa = ['Pound','Kilogram']
else:
scalesa = ['Mile','Kilometer']
update_menu(from_menu, from_var, scalesa)
update_menu(to_menu, to_var, scalesa)
# Menu
kind = ['Temperature', 'Length', 'Weight']
kind_var = StringVar()
all_menu = OptionMenu(App, kind_var, *kind, command=update_conversion_menus) # used command option
all_menu.grid(row=0, column=1, pady=5)
# The scale of the length to be used for conversion
from_var = StringVar()
from_menu = OptionMenu(App, from_var, None)
from_menu.grid(row=1, column=1, pady=5)
# In between label
lbl = Label(App, text=' convert to ')
lbl.grid(row=1, column=2, pady=5)
# The scale of the length to convert the value to
to_var = StringVar()
to_menu = OptionMenu(App, to_var, None)
to_menu.grid(row=1, column=3, pady=5)
# Entry pre-label
numL = Label(App, text='Enter: ')
numL.grid(row=2, column=0, columnspan=1, pady=5)
# Entry field
numE = Entry(App)
numE.grid(row=2, column=1, columnspan=1, pady=5)
# In between Entry field and Converter function
equal = Label(App, text=' = ')
equal.grid(row=2, column=2, pady=5)
# result of conversion
conv_numL = Label(App, width=10)
conv_numL.grid(row=2, column=3, pady=5)
# Converter temperature function
def Convert_Temperature(froM, tO, num):
if froM == 'Fahrenheit' and tO == 'Celsius':
num = (num - 32) * 5 / 9
elif froM == 'Celsius' and tO == 'Fahrenheit':
num = (num * 9 / 5) 32
return num
# Converter length function
def Convert_Length(froM, tO, num):
if froM == 'Mile' and tO == 'Kilometer':
num *= 1.609
elif froM == 'Kilometer' and tO == 'Mile':
num /= 1.609
return num
# Converter weight function
def Convert_Weight(froM, tO, num):
if froM == 'Pound' and tO == 'Kilogram':
num /= 2.205
elif froM == 'Kilogram' and tO == 'Pound':
num *= 2.205
return num
def do_conversion():
try:
froM = from_var.get()
tO = to_var.get()
num = float(numE.get().strip()) # exception may be raised on invalid input
# do corresponding conversion based on selections
index = kind_var.get()
if index == 'Temperature':
converted_num = Convert_Temperature(froM, tO, num)
elif index == 'Length':
converted_num = Convert_Length(froM, tO, num)
else:
converted_num = Convert_Weight(froM, tO, num)
# show the conversion result
conv_numL.config(text=round(converted_num, 4))
except Exception as e:
print(e)
Button(App, text='Convert', command=do_conversion).grid(row=3, column=1, pady=5)
# Clear text function
def clear_text():
numE.delete(0, END)
from_var.set("")
to_var.set("")
conv_numL.config(text="")
# Clear text button
btn = Button(App, text="Restart", command=clear_text)
btn.grid(row=3, column=3, pady=5)
App.mainloop()
請注意，我已將一些變數名稱更改為_from或to_不是好的變數名稱，并且all是一個內置函式。
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