我有我正在運行的示例代碼。我正在創建一個視窗，當我加載模板頁面并單擊“單擊我”按鈕時，它會在螢屏上添加 20 個框。10 行，2 寬。第 1 列是汽車制造商，第 2 列是型號。
當我單擊第 1 行中的 Make 框并將其從 Ford 更改為 Toyota 時，我希望第 1 行中的模型組合框更改為顯示 Toyota 模型。但它只適用于最后一行。是否有可能讓每一行作業？
import tkinter as tk
from tkinter import font as tkfont, filedialog, messagebox
from tkinter.ttk import Combobox
class SLS_v1(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
# Setting up the root window
self.title('Test App')
self.geometry("200x300")
self.resizable(False, False)
self.title_font = tkfont.Font(family='Helvetica', size=18, weight="bold", slant="italic")
container = tk.Frame(self)
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {}
self.frames["MenuPage"] = MenuPage(parent=container, controller=self)
self.frames["template"] = template(parent=container, controller=self)
self.frames["MenuPage"].grid(row=0, column=0, sticky="nsew")
self.frames["template"].grid(row=0, column=0, sticky="nsew")
self.show_frame("MenuPage")
def show_frame(self, page_name):
frame = self.frames[page_name]
frame.tkraise()
class MenuPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
template = tk.Button(self, text='Template', height=3, width=20, bg='white', font=('12'),
command=lambda: controller.show_frame('template'))
template.pack(pady=50)
class template(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.grid(columnspan=10, rowspan=10)
button = tk.Button(self, text='Click me', command= lambda: stored_functions().add_boxes(self))
button.grid(row=11, column=1)
class stored_functions():
make = ['Ford', 'Toyota', 'Honda']
models = [['F-150', 'Mustang', 'Explorer'], ['Camry', 'Corolla', 'Tacoma'], ['Civic', 'CRV', 'Accord']]
def add_boxes(self, main_window):
for row in range(10):
self.make_var = tk.StringVar(main_window)
self.make_options = self.make
self.make_var.set(self.make_options[0])
self.make_selection = tk.ttk.Combobox(main_window, value=self.make_options,
state='readonly', width=10)
self.make_selection.current(0)
self.make_selection.bind('<<ComboboxSelected>>', lambda event:
stored_functions.update_models(self, selection=self.make_selection))
self.make_selection.grid(row=row, column=1)
self.model_var = tk.StringVar(main_window)
self.model_options = self.models[0]
self.model_var.set(self.model_options[0])
self.model_selection = tk.ttk.Combobox(main_window, value=self.model_options,
state='readonly', width=10)
self.model_selection.current(0)
self.model_selection.grid(row=row, column=2)
def update_models(self, selection):
if selection.get() == 'Ford':
self.model_options = self.models[0]
if selection.get() == 'Toyota':
self.model_options = self.models[1]
if selection.get() == 'Honda':
self.model_options = self.models[2]
self.model_selection.config(values=self.model_options)
self.model_selection.current(0)
if __name__ == "__main__":
app = SLS_v1()
app.mainloop()
uj5u.com熱心網友回復：
您對汽車品牌和型號選擇使用了相同的變數，因此變數指的是 for 回圈后的最后一組。
您需要將模型組合框傳遞給update_models()使用引數的默認值：
class stored_functions():
make = ['Ford', 'Toyota', 'Honda']
models = [['F-150', 'Mustang', 'Explorer'], ['Camry', 'Corolla', 'Tacoma'], ['Civic', 'CRV', 'Accord']]
def add_boxes(self, main_window):
for row in range(10):
self.make_var = tk.StringVar(main_window)
self.make_options = self.make
self.make_var.set(self.make_options[0])
self.make_selection = tk.ttk.Combobox(main_window, value=self.make_options,
state='readonly', width=10)
self.make_selection.current(0)
self.make_selection.grid(row=row, column=1)
self.model_var = tk.StringVar(main_window)
self.model_options = self.models[0]
self.model_var.set(self.model_options[0])
self.model_selection = tk.ttk.Combobox(main_window, value=self.model_options,
state='readonly', width=10)
self.model_selection.current(0)
self.model_selection.grid(row=row, column=2)
# pass the corresponding model combobox to bind function
self.make_selection.bind(
'<<ComboboxSelected>>',
lambda event, peer=self.model_selection: self.update_models(event.widget.get(), peer)
)
def update_models(self, selection, model_selection):
model_options = self.models[self.make.index(selection)]
model_selection.config(values=model_options)
model_selection.current(0)
請注意，沒有必要在 for 回圈內使用實體變數。那些StringVars 也根本沒有使用，所以功能可以簡化如下：
class stored_functions():
make = ['Ford', 'Toyota', 'Honda']
models = [['F-150', 'Mustang', 'Explorer'], ['Camry', 'Corolla', 'Tacoma'], ['Civic', 'CRV', 'Accord']]
def add_boxes(self, main_window):
for row in range(10):
make_selection = tk.ttk.Combobox(main_window, value=self.make,
state='readonly', width=10)
make_selection.current(0)
make_selection.grid(row=row, column=1)
model_selection = tk.ttk.Combobox(main_window, value=self.models[0],
state='readonly', width=10)
model_selection.current(0)
model_selection.grid(row=row, column=2)
make_selection.bind(
'<<ComboboxSelected>>',
lambda event, peer=model_selection: self.update_models(event.widget.get(), peer)
)
def update_models(self, selection, model_selection):
model_options = self.models[self.make.index(selection)]
model_selection.config(values=model_options)
model_selection.current(0)
轉載請註明出處，本文鏈接：https://www.uj5u.com/ruanti/365153.html
標籤：Python 蟒蛇-3.x 特金特 tk ttkwidgets