Tkinter：从外部函数刷新 frame/window

Question

我想在 updateCustomerList 完成列表更新后刷新 MainPage，以便此更新后的列表显示在 MainPage 小部件上。

我试过 tk.show_frame(<frame>) 等等，但由于函数本身没有绑定到主 Tkinter 框架本身，甚至不是 Tkinter 对象，所以我不完全确定如何重新加载页面。有什么建议吗？

下面的代码是我整个程序的一个片段：

customerList = [] #list is updated at the updateCustomerList function; global variable

class POS(tk.Tk):
    def __init__(self,*args,**kwargs):
        tk.Tk.__init__(self, *args, **kwargs)

        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 = {}
        for F in (ErrorPage, PaymentPage, MainPage): 
            frame = F(container, self)
            self.frames[F] = frame
            frame.grid(row=0, column = 0, sticky = "nsew")

        #show frame here


class MainPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)
        """
        Tkinter frame that I would like to "refresh" and use the new updated list
        """
        frame5Button = ttk.Button(frame5, text = "Add Item", command = lambda: updateCustomerList(barCode, quantity))
        frame5Button.grid(row = 0, column = 5, padx = 90, pady = 10)
        #This button allows me to go into the updateCustomerList function

def updateCustomerList(barCode, quantity):
    #some code to update a list
    #when function finishes updating the list, I would like to go back to the MainPage Tk frame and reload all the widgets like labels and entry boxes using the updated customerList list

app = POS()
app.geometry("700x700") 
app.resizable(False, False)
app.after(100, MasterFilePopUp)
app.mainloop()

Answer 1

只需删除并重新创建 Mainframe 的实例作为 updateCustomerList 的最后一行：

container = 0 #global variable

在 POS(tk.Tk) 中添加 "global container"

def updateCustomerList(barCode, quantity):
    global app
    ...
    app.frames[MainPage].destroy()
    app.frames[MainPage] = MainPage(container, app)
    app.frames[MainPage].grid(row=0, column = 0, sticky = "nsew")
    app.frames[MainPage].tkraise() 
#function ends here

Tkinter：从外部函数刷新 frame/window

Tkinter: refresh frame/window from an outside function

python

tkinter

reload