下拉列表依赖于另一个下拉tkinter [英] Drop down list dependent from another drop down tkinter

问题描述

我有一个列出汽车品牌的清单，还有一个列出了这些品牌的车型名称的清单.我想有两个下拉列表.首先选择品牌，然后在第二个下拉列表中选择型号.但仅是所选品牌的型号.我得到以下代码.

I have one list with car brands in it and a second list with model names from these brands. I want to have two dropdown lists. First you select the brand and in the second dropdown you can select the model. But just models from the selected brand. I got the following code.

import tkinter as tk

brands = ["Bugatti","VW","Opel","Porsche"]
models = [["Veyron","Chiron"],
          ["Golf","Passat","Polo","Caddy"],
          ["Insignia","Corsa","Astra"],
          ["Taycan","Cayenne","911"]] 

root = tk.Tk()
canvas = tk.Canvas(root, height=500, width= 500, bg="white")
canvas.pack()

tkvar = tk.StringVar(root)
tkvar.set('Choose')

popupMenu1 = OptionMenu(canvas, tkvar, *brands)
popupMenu1.pack()

def change_dropdown(*args):

    print("Chosen brand " + tkvar.get())

    for i in range(len(brands)):
        if tkvar.get() == brands[i]:
            print(models[i])

tkvar.trace('w', change_dropdown)
root.mainloop()

现在如何使用列表模型中的信息创建第二个下拉列表.感谢您的帮助.

How do i now create a second dropdown with the information from the list models. Thanks for your help.

推荐答案

您可以使用组合框制作相关的下拉列表

You can use Combobox to make dependent dropdown list

import tkinter
from tkinter import ttk
root = tkinter.Tk()
''' 
widgets are added here 
'''
brands = ["Bugatti","VW","Opel","Porsche"]

models = [["Veyron","Chiron"],
          ["Golf","Passat","Polo","Caddy"],
          ["Insignia","Corsa","Astra"],
          ["Taycan","Cayenne","911"]]

car_brand = ttk.Combobox(root, width=37, value=(brands))
car_brand.grid(row=3, column=1, columnspan=2, padx=10, pady=2, sticky='w')

def callback(eventObject):
    abc = eventObject.widget.get()
    car = car_brand.get()
    index=brands.index(car)
    car_model.config(values=models[index])

car_model = ttk.Combobox(root, width=37)
car_model.grid(row=4, column=1, columnspan=2, padx=10, pady=2, sticky='w')
car_model.bind('<Button-1>', callback)

root.mainloop()

这篇关于下拉列表依赖于另一个下拉tkinter的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！