Tkinter子面板不显示及面板切换失效问题排查与解决

• 因最初核心问题已解决，关闭此问题
  我正在开发一款小型应用，左侧面板展示菜单按钮，右侧呈现对应功能。

问题1及解决 #

问题1： 主应用窗口正常显示，AppDownloader()单独运行也正常，目标是让AppDownloader()框架显示在右侧面板中。
解决方法： 绘制面板的调用未放在__init__中，将已有的draw_downloader_pane()方法添加到AppDownloader.__init__()中解决了此问题。目前仍在处理下载面板的组件布局问题，此问题独立于当前问题。

问题2：面板无法切换 #

问题2： 但面板仍无法切换，即使已确认AppTransform.__init__()方法不存在问题1的相同情况。

我已检查master引用，确保调用的是正确的框架，认为tkraise()作用于正确对象。点击主窗口按钮时能得到调试信息，但页面无法切换。

更新：已包含问题1解决方案的修订版AppDownloader()代码

app_main.py #

import tkinter as tk
from tkinter import Misc
import customtkinter as ctk
## my modules
from app_downloader import AppDownloader
from app_transform import AppTransform
from app_toolkit import CTK_DARK_MODE, CTK_COLOR_SCHEME, PADX, PADY, COLOR_THEME
# log formatting
from my_logging import setup_logging 

logger = setup_logging('app_main.py')

ctk.set_appearance_mode(CTK_DARK_MODE)
ctk.set_default_color_theme(CTK_COLOR_SCHEME)
              
class AppMain(ctk.CTk):
    def __init__(self, *args, **kwargs):
        ctk.CTk.__init__(self,  *args, **kwargs)
        WIDTH = 680
        HEIGHT = 600
        MENU_WIDTH = 280
        self.title("Switch Frames")
        self.geometry(f'{WIDTH}x{HEIGHT}')
        self.grid_rowconfigure(0, weight=1) 
        self.grid_columnconfigure(0, weight=1)
        self.left_master = ctk.CTkFrame(master=self, **COLOR_THEME, width=MENU_WIDTH, corner_radius=0)
        self.left_master.pack(side=tk.LEFT, fill=tk.Y, expand=False, padx=PADX, pady=PADY)
        self.right_master = ctk.CTkFrame(master=self, **COLOR_THEME, corner_radius=0)
        self.right_master.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)

    def draw_left_menu(self):
        row_i=1
        menu_heading = ctk.CTkLabel(master=self.left_master, text="Activity Menu", font=("Roboto Medium", -16))
        menu_heading.grid(row=row_i, column=0,  padx=PADX, pady=PADY)    
        row_i += 1
        
        BTN_PADX = 9
        BTN_PADY = 8
        BTN_IPADY = 5
        self.menu_buttons = [
            {'btn_name': 'download', 'btn_label': 'Download Shelf', 'frame_name': 'AppDownloader'},
            {'btn_name': 'transform', 'btn_label': 'Transform Data', 'frame_name': 'AppTransform'},
            {'btn_name': 'updates', 'btn_label': 'Find Updates (Unimplemented)', 'frame_name': None},
            {'btn_name': 'ids', 'btn_label': 'Find Book IDs (Unimplemented)', 'frame_name': None},
            {'btn_name': 'save',  'btn_label': 'Save Results (Unimplemented)', 'frame_name': None},
            {'btn_name': 'quit', 'btn_label': 'Quit App', 'frame_name': None}, 
            ]
        for data in self.menu_buttons:
            str_var = tk.StringVar()
            str_var.set(data['btn_label'])
            btn = ctk.CTkButton(self.left_master, textvariable=str_var, 
                                corner_radius=6, width=130)
            btn._text_label.configure(wraplength=140)
            data['btn_object'] = btn
            if 'quit' in data['btn_label']:
                btn.grid(row=row_i, column=0, padx=BTN_PADX, pady=(40,0), ipady=BTN_IPADY)
            else:    
                btn.grid(row=row_i, column=0, padx=BTN_PADX, pady=BTN_PADY, ipady=BTN_IPADY)
            row_i += 1

    def draw_right_container(self):
        self.frames = {}
        self.right_container = ctk.CTkFrame(self.right_master)
        self.right_container.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
        for F in (AppDownloader, AppTransform):
            page_name = F.__name__
            frame = F(parent=self.right_container, controller=self)
            self.frames[page_name] = frame
            frame.pack(side="top", fill=tk.BOTH, expand=True)

    def show_frame(self, frame_name):
        frame = self.frames[frame_name]
        ## debug statement      
        logger.debug(f"{frame}")  
        frame.tkraise()

    def configure_buttons(self):   
        self.menu_buttons[0]['btn_object'].configure(command=lambda:self.show_frame('AppDownloader'))
        self.menu_buttons[1]['btn_object'].configure(command=lambda:self.show_frame('AppTransform'))

    def start_app(self):    
        self.draw_left_menu()
        self.draw_right_container()
        self.configure_buttons()


a = AppMain()
a.start_app()
a.mainloop()

修正后的AppDownloader代码（app_downloader.py） #

class AppDownloader(ctk.CTkFrame, InitValues):
    def __init__(self, parent, controller):
        ctk.CTkFrame.__init__(self, parent, **COLOR_THEME)
        InitValues.__init__(self)
        self.parent = parent
        self.controller = controller
        self.grid_columnconfigure(1, weight=0, uniform='auto')
        # init code here
        self.draw_downloader_pane()

    # functionality methods snipped

    def draw_downloader_pane(self):
        self.frame_body = ctk.CTkFrame(master=self.parent, **COLOR_THEME)
        banner_frame = ctk.CTkFrame(master=self.parent, **COLOR_THEME)
        banner_frame.pack(side=tk.TOP, fill=tk.X, expand=True, padx=PADX, pady=PADY)
        banner = ctk.CTkLabel(master=banner_frame, text="Download and Save Files", 
                              **COLOR_THEME)
        banner.pack(side=tk.TOP, fill=tk.X, expand=True, padx=PADX, pady=PADY)
        self.draw_frame_body()
        self.frame_body.pack(side=tk.TOP, fill=tk.BOTH, expand=True, padx=PADX)

内容的提问来源于stack exchange，提问作者Meghan M.