Passing variables between frames in Tkinter 2.0? - python-3.x

Question

Passing variables between frames in Tkinter
Followed the multiframe class example in:
from Switch between two frames in tkinter
by Bryan Oakley / Steven M. Vascellaro
Everything works fine within each frame, but trying to pass a Frame StartPage-entry text into the Frame PageTwo-scroll requires syntax in :
txtScroll(txt): ??????scroll.insert(tk.INSERT,scrolltxt)
I do not get.
BTW:
Tried following the original solution to:
Passing variables between frames in Tkinter
by adding
def __init__(self, master,controller, uploadPage=None):
self.controller = controller
self.uploadPage = PageTwo
To no avail ??????
# from https://stackoverflow.com/questions/7546050/switch-between-two-frames-in-tkinter
# by Bryan Oakley / Steven M. Vascellaro
import tkinter as tk # python 3
from tkinter import ttk, font as tkfont, scrolledtext # python 3
from tkinter.ttk import *
#definitions ----------------------
def txtClicked(txt):
res = "Entry text " + txt.get()
print(res)
def txtScroll(txt):
# Problem with output to scroll in different class ?
scroll.insert(tk.INSERT,scrolltxt)
def scrollInsert(scroll,scrolltxt):
scroll.insert(tk.INSERT,scrolltxt)
#Frame class ----------------------
class SampleApp(tk.Tk):
def __init__(self):
tk.Tk.__init__(self)
self._frame = None
self.replace_frame(StartPage)
def replace_frame(self, frame_class):
"""Destroys current frame and replaces i with a new one."""
new_frame = frame_class(self)
if self._frame is not None:
self._frame.destroy()
self._frame = new_frame
self._frame.pack()
class StartPage(tk.Frame):
def __init__(self, master, uploadPage=None):
tk.Frame.__init__(self, master)
#self.controller = controller
self.uploadPage = PageTwo
tk.Label(self, text="This is the start page").pack(side="top", fill="x", pady=10)
# Entry
txt = Entry(self,width=10)
txt.pack(side="top", fill="x", pady=10)
btn = Button(self, text="Get Entry", command=lambda: txtClicked(txt)).pack()
btn = Button(self, text="Scroll Output", command=lambda: txtScroll(txt)).pack()
#-------------
tk.Button(self, text="Open page one", command=lambda: master.replace_frame(PageOne)).pack()
tk.Button(self, text="Open page two", command=lambda: master.replace_frame(PageTwo)).pack()
class PageOne(tk.Frame):
def __init__(self, master, uploadPage=None):
tk.Frame.__init__(self, master)
#self.controller = controller
self.uploadPage = PageTwo
tk.Label(self, text="This is page one").pack(side="top", fill="x", pady=10)
tk.Button(self, text="Return to start page", command=lambda: master.replace_frame(StartPage)).pack()
class PageTwo(tk.Frame):
def __init__(self, master, uploadPage=None):
tk.Frame.__init__(self, master)
#self.controller = controller
print ("tk.Frame: ", tk.Frame )
print ("self: ", self )
print ("master: ", master )
# scrolledtext
scroll = scrolledtext.ScrolledText(self,width=40,height=10)
scroll.pack(side="bottom", padx=10, pady=10)
scrolltxt = "Print scroll stuff..."
btn = Button(self, text="Print scroll", command=lambda: scrollInsert(scroll,scrolltxt)).pack()
#-------------
tk.Label(self, text="This is page two").pack(side="top", fill="x", pady=10)
tk.Button(self, text="Return to start page", command=lambda: master.replace_frame(StartPage)).pack()
#Tkinder Main ----------------------
if __name__ == "__main__":
app = SampleApp()
app.mainloop()