I have two subclass frames, MainFrame and SubFrame. The SubFrame has an entry widget (entry1) to enter a time, the default entry is is 00:00. From the MainFrame I want to get the time that has been entered in the entry1 box in the SubFrame. How do I go about getting the entry widget data in SubFrame from MainFrame?
#!/usr/bin/python3.9
import tkinter as tk
from tkinter import ttk
class MainFrame(ttk.Frame):
def __init__(self, container):
style_name = f'{id(self)}.TFrame' # build the style name using object ID
super().__init__(container, style=style_name) # apply the style
s = ttk.Style()
s.configure(style_name, background='red')
self.labelA = ttk.Label(self, text = "This is on MainFrame")
self.labelA.grid(column=1, row=2, padx = 30, pady = 30)
self.buttonA = tk.Button(self, text="get from subframe", command=self.get_time)
self.buttonA.grid(column=1, row=3)
def get_time(self):
print(self.other.entry1.get())
class SubFrame(ttk.Frame):
def __init__(self, container):
style_name = f'{id(self)}.TFrame' # build the style name using object ID
super().__init__(container, style=style_name) # apply the style
s = ttk.Style()
s.configure(style_name, background='blue')
self.labelB = ttk.Label(self, text = "This is on SubFrame")
self.labelB.grid(column=1, row=2, padx = 30, pady = 30)
self.buttonB = tk.Button(self, text="get within class", command=self.get_time)
self.buttonB.grid(column=1, row=3)
## ENTRY STYLE
style = {'fg': 'black', 'bg': 'white', 'font': 'Helvetica 14 bold', 'width':'6', 'bd':'2',
'highlightbackground':"black", 'justify':'center', 'relief':'sunken',
'insertontime': '0' } # highlightcolor':"red"
self.entry1_var=tk.StringVar()
self.entry1_var.set("00:00")
self.entry1=tk.Entry(self, textvariable=self.entry1_var, width=5, justify="center",)
self.entry1.grid(column=2, row=3, padx=(0, 0), pady=(0,10))
self.entry1.configure(style)
## works if called from within subclass
def get_time(self):
data = self.entry1_var.get()
print (data)
class App(tk.Tk):
def __init__(self):
super().__init__()
s = ttk.Style()
unfocus = "gray"
focus = "#F2C84B"
s.theme_create( "custom", parent="alt", settings={
"TNotebook": {"configure": {"tabmargins": [2, 5, 2, 0] } },
"TNotebook.Tab": {
"configure": {"padding": [5, 1], "background": unfocus },
"map": {"background": [("selected", focus)],
"expand": [("selected", [1, 1, 1, 0])] } } } )
s.theme_use("custom")
self.notebook = ttk.Notebook(self)
self.Frame1 = MainFrame(self.notebook)
self.Frame2 = SubFrame(self.notebook)
self.Frame1.other = self.Frame2
self.notebook.add(self.Frame1, text='MainFrame')
self.notebook.add(self.Frame2, text='SubFrame')
self.notebook.pack(expand = 1, fill ="both")
##--------------------------------##
self.geometry('800x500')
#self.resizable(False, False)
self.title("TABS")
if __name__ == '__main__':
app = App()
sFrame = SubFrame(app)
MainFrame(app)
SubFrame(app)
app.mainloop()
You have a reference before declaration problem with Frame1 and Frame2.
Frame1 had no reference to Frame2 since it didn't exist when Frame1 was created.
Give Frame1 a reference to Frame2 and your problem is solved.
For example you might try the following code:
self.Frame1 = MainFrame(self.notebook)
self.Frame2 = SubFrame(self.notebook)
# create a link from frame2 to frame1 as other
self.Frame1.other = self.Frame2
Then change MainFrame.get_time to:
def get_time(self):
print(self.other.entry1.get())