The code is correct (and very interesting indeed - From stackoverlflow, because facilitate working comboboxes in classes!). The code is a little long, but just to create the structure to make combobox work in this parent, controler, container model. On the other hand,comoboboxes are "burning my brains out". The hard part: I can reset the lower combobox clicking the button. But I need to reset it to 'I´m your friend' just choosing any option in upper combobox (without use of button). I've tried insert "self.combobox_HPFilter.set('I´m your friend')" in a function and insert this in the functions called "make_guess", unfortunately unsuccessfuly. I really appreciate any help.
# from Bryan Oakley and others from the "amazing" Stackoverflow
# https://stackoverflow.com/questions/7546050/switch-between-two-frames-in-tkinter/7557028#7557028
import tkinter as tk # python 3
from tkinter import font as tkfont # python 3
from tkinter import ttk
class SampleApp(tk.Tk):
'''
All the code is working.The sole issue is: to reset second combobox text direct from options in upper combobox
'''
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
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 = {}
for F in (StartPage, PageOne):
page_name = F.__name__
frame = F(parent=container, controller=self)
self.frames[page_name] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame("StartPage")
def show_frame(self, page_name):
'''Show a frame for the given page name'''
frame = self.frames[page_name]
frame.tkraise()
class StartPage(tk.Frame):
def make_guess01(self):
print("I've got a cute friend")
def make_guess02(self):
print('Ned is correct')
def make_guess03(self):
print('Patrick')
def make_guess04(self):
print('Best Hommer friend')
def labels_reset(self):
self.combobox_HPFilter.set('I´m your friend')
#-------------------------first combobox start
def change_Montage_combobox(self, event): # this method goes inside def montage_Combo(self):
myvar = (self.comboboxMontages.get())
# lines 1 2 3 4 say that values(function_name) in montageDict are functions in StartPage
function_name = self.montagesDict[myvar] #1 returns the function(method) in montageDic(value of key:value pair)
# just for reference: print(function_name)--> montage_Original (dictionary montagesDict value)
an_object = StartPage(self, tk.Frame) # 2--> the page (class) where function is
class_method = getattr(StartPage, function_name) # 3 returns method and says the page of the method
result = class_method(an_object) # 4 result is the method right for use
def montage_Combo(self):
self.montage_selector = tk.StringVar()
self.comboboxMontages = ttk.Combobox(self, values=sorted(list(self.montagesDict.keys())),
justify="center", textvariable=self.montage_selector, state="readonly",
)
self.comboboxMontages.bind('<<ComboboxSelected>>', lambda event: self.change_Montage_combobox(event))
self.comboboxMontages.pack()
self.comboboxMontages.set('Who is my friend')
#-------------------------first combobox end
#-------------------------second combobox start
def highPassFilter_Change_combobox(self, event): # this method goes inside def montage_Combo(self):
myvar = (self.combobox_HPFilter.get())
function_name = self.highPassFilterDict[myvar] # 1
an_object = StartPage(self, tk.Frame) # 2
class_method = getattr(StartPage, function_name) # 3
highPassFilter_result = class_method(an_object) # 4
def highPassFilter_Combo(self):
self.highPassFilter_selector = tk.StringVar()
self.combobox_HPFilter = ttk.Combobox(self, values=sorted(list(self.highPassFilterDict.keys())),
justify="center", textvariable=self.highPassFilter_selector,
state="readonly")
self.combobox_HPFilter.bind('<<ComboboxSelected>>', lambda event: self.highPassFilter_Change_combobox(event))
self.combobox_HPFilter.pack()
self.combobox_HPFilter.set('I´m your friend')
#-------------------------second combobox end
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.montagesDict = {'SpongeBob': 'make_guess01',
'Hommer': 'make_guess02'
}
self.highPassFilterDict = {'Patrick': 'make_guess03',
'Ned Flanders': 'make_guess04',
}
label = tk.Label(self, text="This is the start page", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button1 = tk.Button(self, text="how reset lower combobox clicking upper combobox?",
command=self.labels_reset)
button1.pack()
self.montage_Combo()
self.highPassFilter_Combo()
#class PageOne just to make code play
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 1", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.pack()
if __name__ == "__main__":
app = SampleApp()
app.mainloop()
