Is it possible to grab input from the topview tkinter window and retrieve saved entry field value from within master tk window - python-3.x

Question

The program is made up of classes and I am trying to use a tkinter topview from within a function so that when it's called it is able to retrieve the entryfield value to the master class
from tkinter import
from PIL import Image, ImageTk
Below is the driver code handling the transitioning from one class to another
class SeaofBTCapp(Tk):
def __init__(self, *args, **kwargs):
Tk.__init__(self, *args, **kwargs)
container = 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 (
WelcomePage, Register_new_user): # ,PageThree,PageFour):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(WelcomePage)
# def show_frame(self, cont):
# frame = self.frames[cont]
# frame.tkraise()
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
frame.update()
frame.event_generate("<<show_frame>>")
def get_page(self, cont):
for page in self.frames.values():
if str(page.__class__.__name__) == cont:
return page
return None
class Register_new_user(object):
pass
Below is the entry point of the program and is the first page to be displayed
class WelcomePage(Frame):
def __init__(self, parent, controller):
Frame.__init__(self, parent)
# self.bind("<<show_frame>>", self.main_prog)
def resize_image(event):
global photo
new_width = event.width
new_height = event.height
image = copy_of_image.resize((new_width, new_height))
photo = ImageTk.PhotoImage(image)
label.config(image=photo)
label.image = photo # avoid garbage collection
def pin_input():
top = Toplevel()
top.geometry("180x100")
top.title("toplevel")
l2 = Label(top, text="This is toplevel window")
global entry_1
global password
password = StringVar
entry_1 = None
def cleartxtfield():
global password
new = "3"
password.set(new)
# ############# Function to parse for only numerical input
def validate(input):
if input.isdigit():
return True
elif input == "":
return True
else:
return False
def enternumber(x):
global entry_1
setval = StringVar()
setval = str(x)
# print(setval)
entry_1.insert(END, setval)
entry_1 = Entry(top, textvariable=password, width=64, show='*')
entry_1.place(x=200, y=100)
entry_1.focus()
reg = top.register(validate)
entry_1.config(validate="key", validatecommand=(reg, '%P'))
def getcreds():
# check if four digit entered and is not empty
global passwd
passwd = password.get()
print(f"The Credentials are {passwd}")
def funcbackspace():
length = len(entry_1.get())
entry_1.delete(length - 1, 'end')
def killwindow():
# when the user quits it should clear all the data input fields filled in in the previous steps. and should display information that it is about to quit in a few seconds
command = top.destroy()
# Label(top,text="Goodbye\n (Closing in 2 seconds)")
top.after(2000, top.quit())
cancel = Button(top, width=8, height=3, text="Cancel", bg="red", fg="black", command=killwindow)
cancel.place(x=220, y=150)
backspace = Button(top, width=8, height=3, text="Backspace", bg="red", fg="black", command=funcbackspace)
backspace.place(x=500, y=150)
# ----number Buttons------
def enternumber(x):
global entry_1
setval = StringVar()
setval = str(x)
# print(setval)
entry_1.insert(END, setval)
btn_numbers = []
for i in range(10):
btn_numbers.append(
Button(top, width=8, height=3, text=str(i), bd=6, command=lambda x=i: enternumber(x)))
btn_text = 1
for i in range(0, 3):
for j in range(0, 3):
btn_numbers[btn_text].place(x=220 + j * 140, y=250 + i * 100)
btn_text += 1
btn_zero = Button(top, width=15, height=2, text='0', bd=5, command=lambda x=0: enternumber(x))
btn_zero.place(x=330, y=550)
clear = Button(top, text="Clear", bg="green", fg="white", width=8, height=3, command=cleartxtfield)
clear.place(x=220, y=550)
okbtn = Button(top, text="Enter", bg="green", fg="black", width=8, height=3, command=getcreds)
okbtn.place(x=500, y=550)
val = getcreds()
print("The value to be returned is %s" % val)
return val
password = pin_input()
print("Gotten password is %s" % password)
copy_of_image = Image.open("image.png")
photoimage = ImageTk.PhotoImage(copy_of_image)
label = Label(self, image=photoimage)
label.place(x=0, y=0, relwidth=1, relheight=1)
label.bind('<Configure>', resize_image)
top_left_frame = Frame(self, relief='groove', borderwidth=2)
top_left_frame.place(relx=1, rely=0.1, anchor=NE)
center_frame = Frame(self, relief='raised', borderwidth=2)
center_frame.place(relx=0.5, rely=0.75, anchor=CENTER)
Button(top_left_frame, text='REGISTER', bg='grey', width=14, height=1,
command=lambda: controller.show_frame(Register_new_user)).pack()
Button(center_frame, text='ENTER', fg='white', bg='green', width=13, height=2,
command=lambda: controller.show_frame(Register_new_user)).pack()
if __name__ == '__main__':
app = SeaofBTCapp()
app.title("Password return on topview window")
width = 1000
height = 700
screenwidth = app.winfo_screenwidth()
screenheight = app.winfo_screenheight()
alignstr = '%dx%d+%d+%d' % (width, height, (screenwidth - width) / 2, (screenheight - height) / 2)
app.geometry(alignstr)
# app.resizable(width=False, height=False)
app.resizable(width=True, height=True)
app.mainloop()

Answer 1

If I understand this correctly you want to enter a password in a dialog and then get the password from the dialog when you close it.
Have a look at Dialog Windows at effbot for a discussion about creating dialog windows.
Here is an example of how you can implement a simple dialog:
from tkinter import *
from tkinter import simpledialog
class MyDialog(simpledialog.Dialog):
def body(self, master):
'''create dialog body.
return widget that should have initial focus.
This method should be overridden, and is called
by the __init__ method.'''
Label(master, text='Value:').grid(row=0)
self.e1 = Entry(master)
self.e1.grid(row=0, column=1)
return self.e1 # initial focus
def apply(self):
'''process the data
This method is called automatically to process the data, *after*
the dialog is destroyed. By default, it does nothing.'''
value = self.e1.get()
self.result = value
def validate(self):
'''validate the data
This method is called automatically to validate the data before the
dialog is destroyed. By default, it always validates OK.'''
return 1 # override
def buttonbox(self):
'''add standard button box.
override if you do not want the standard buttons
'''
box = Frame(self)
w = Button(box, text="OK", width=10, command=self.ok, default='active')
w.pack(side='left', padx=5, pady=5)
w = Button(box, text="Cancel", width=10, command=self.cancel)
w.pack(side='left', padx=5, pady=5)
self.bind("<Return>", self.ok)
self.bind("<Escape>", self.cancel)
box.pack()
if __name__ == '__main__':
root = Tk()
root.geometry('200x100+800+50')
def do():
d = MyDialog(root)
print(d.result)
b = Button(root, text='Go!', width=10, command=do)
b.pack(expand=True)
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