如何解决Python Tkinter 菜单系统无法汇总和显示价格
python 新手,我一直在尝试用 Tkinter 构建一个小菜单,我的想法是当我从菜单中选择一个项目时,它的名称出现在较大的屏幕中,而所选项目的总数出现在较小的屏幕中屏幕,我的函数叫做 fireFood。我目前看到我的价格在一条线上运行,而不是被总计,我已经坚持了几天,希望有人能指出我正确的方向。
rom tkinter import ttk
import tkinter as tk
root = tk.Tk()
root.geometry('500x300')
root.title('Server Window')
root.wm_resizable(width=False,height=False)
# Create display area for selected items
display = tk.Text(root,height=10,width=30,bg='Orange',bd=4)
display.grid(row=1,column=3)
price_display = tk.Text(root,height=3,width=15,bd=4)
price_display.grid(row=3,column=3)
#====================== Functions =================================
def fireFood():
# Every time a new item is selected i want a new total to be calculated and displayed
global menu
global price_display
global display
global select_option
total = 0
prices = []
# this inserts food item onto display
display.insert(tk.END,options.get())
prices.append([options.get(),menu[options.get()]])
for x in prices:
total = total + float(x[1])
# this shows price on lower display
price_display.insert(tk.END,total)
total += float(menu[options.get()])
def addList(arr):
cost = 0
arr.remove('\n')
total = [sum(float(x) for x in arr)]
for x in total:
cost += x
return cost
#======================================================================
# Create a Dictionary of items to be displayed in ComboBox
menu = {'fries ':5,'Burger ':10,'Pizza ':15,'Chicken ':8,'Fish ':7.50}
menu_list = [x for x in menu.keys()]
menu_prices = [y for y in menu.values()]
options = ttk.ComboBox(values=menu_list)
# Set default value for the comboBox to 'Menu' to function as a pseudo label
options.set('Menu')
options.grid(row=0,column=0)
# Create a button that when pressed will get the value of comboBox
select_option = ttk.Button(root,text='Select',command=fireFood)
select_option.grid(row=0,column=1)
root.mainloop()
解决方法
这对我有用。
price_display = tk.Text(root,height=3,width=15,bg='Orange',bd=4)
price_display.grid(row=3,column=3)
total = 0
#====================== Functions =================================
def fireFood():
# Every time a new item is selected i want a new total to be calculated and displayed
global menu
global price_display
global display
global select_option
global prices
global total # make total global
prices = []
# this inserts food item onto display
display.insert(tk.END,options.get())
# this shows price on lower display
total += float(menu[options.get()])
price_display.delete('1.0','end') # delete previous text
price_display.insert(tk.END,total)
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