Pass User Input From Child To Parent Window Python Tkinter
I'm pretty new to Python, and even more new to tkinter. I've searched for an answer to this question and gotten some things that seem close, but none that I have been able to succe
Solution 1:
I think you would benefit from inheriting from the Tk class and Toplevel class here.
This way you can simplify how you pass data between the classes. I have rewritten your code to show how you can pass data between the 2 classes. In this example I created a method called do_somthing_with_data that will print the results of self.data. I added a class attribute to your main class called self.data and from your Toplevel class I manipulate this class attribute by referencing master. From here you simply need to do the data manipulation with self.data that you would do with your other options.
import tkinter as tk
from tkinter import ttk
class MainGUI(tk.Tk):
def __init__(self):
tk.Tk.__init__(self)
self.title('Bolted Joint Analysis')
self.geometry('500x500')
# Adds tabs to main window
self.nb = ttk.Notebook(self)
self.nb.grid(row=1, column=0, columnspan=50, rowspan=49, sticky='NESW')
self.tab1 = ttk.Frame(self.nb)
self.nb.add(self.tab1, text='Tab1')
self.tab2 = ttk.Frame(self.nb)
self.nb.add(self.tab2, text='Tab2')
self.data = {}
# defines a grid 50 x 50 cells in the main window & tabs
rows = 0
while rows < 50:
self.rowconfigure(rows, weight=1)
self.columnconfigure(rows, weight=1)
self.tab1.rowconfigure(rows, weight=1)
self.tab1.columnconfigure(rows, weight=1)
self.tab2.rowconfigure(rows, weight=1)
self.tab2.columnconfigure(rows, weight=1)
rows += 1
# Add Tab1 Labels
self.boltLabel = tk.Label(self.tab1, text="Select A Bolt:")
self.boltLabel.grid(column=0, row=1, sticky='SW')
self.labelMajD = tk.Label(self.tab1, text="Bolt Major Dia. [in]:")
self.labelMajD.grid(column=0, row=4, sticky='W')
self.labelMinD = tk.Label(self.tab1, text="Bolt Minor Dia. [in]:")
self.labelMinD.grid(column=0, row=5, sticky='W')
self.labelPitchD = tk.Label(self.tab1, text="Bolt Pitch Dia. [in]:")
self.labelPitchD.grid(column=0, row=6, sticky='W')
# Add Tab1 Dropdown List - Bolt Choices
self.boltValue = tk.StringVar()
self.BoltList = ttk.Combobox(self.tab1, textvariable=self.boltValue, state='readonly')
self.BoltList['values'] = ('', '#2-56 (UNC)', '1-1/2"-12 (UNF)', 'User Defined')
self.BoltList.grid(column=0, row=2, sticky='NS')
self.BoltList.current(0)
self.BoltList.bind("<<ComboboxSelected>>", self.boltSelectFunc)
# Add Tab1 Entry boxes to display values
self.majDiaBox = tk.Entry(self.tab1)
self.majDiaBox.insert(0, '0.0000')
self.majDiaBox.configure(state='disabled')
self.majDiaBox.grid(column=1, row=4, sticky='NS')
self.minDiaBox = tk.Entry(self.tab1)
self.minDiaBox.insert(0, '0.0000')
self.minDiaBox.configure(state='disabled')
self.minDiaBox.grid(column=1, row=5, sticky='NS')
self.pitchDiaBox = tk.Entry(self.tab1)
self.pitchDiaBox.insert(0, '0.0000')
self.pitchDiaBox.configure(state='disabled')
self.pitchDiaBox.grid(column=1, row=6, sticky='NS')
def do_somthing_with_data(self):
print(self.data)
def boltSelectFunc(self, event):
self.bolt = self.boltValue.get()
print(self.bolt)
if (self.bolt == ''):
self.majDiaBox.configure(state='normal')
self.majDiaBox.delete(0, 'end')
self.majDiaBox.insert(0, '0.0000')
self.majDiaBox.configure(state='disabled')
self.minDiaBox.configure(state='normal')
self.minDiaBox.delete(0, 'end')
self.minDiaBox.insert(0, '0.0000')
self.minDiaBox.configure(state='disabled')
self.pitchDiaBox.configure(state='normal')
self.pitchDiaBox.delete(0, 'end')
self.pitchDiaBox.insert(0, '0.0000')
self.pitchDiaBox.configure(state='disabled')
elif (self.bolt == 'User Defined'):
self.newBoltData = None
ChildWindow(self)
# self.boltSpecs = self.boltBasics(d, n) # need to return d, n from child window to run this calculation
else:
if (self.bolt[0] == '#'):
lhs, rhs = self.bolt.split("-")
d = float(lhs[1:]) * 0.013 + .060
n = float(rhs.split(" ")[0])
self.boltSpecs = self.boltBasics(d, n)
self.majDiaBox.configure(state='normal')
self.majDiaBox.delete(0, 'end')
self.majDiaBox.insert(0, format(self.boltSpecs['d'], '.4f'))
self.majDiaBox.configure(state='disabled')
self.minDiaBox.configure(state='normal')
self.minDiaBox.delete(0, 'end')
self.minDiaBox.insert(0, format(self.boltSpecs['dm'], '.4f'))
self.minDiaBox.configure(state='disabled')
self.pitchDiaBox.configure(state='normal')
self.pitchDiaBox.delete(0, 'end')
self.pitchDiaBox.insert(0, format(self.boltSpecs['dp'], '.4f'))
self.pitchDiaBox.configure(state='disabled')
else:
lhs, rhs = self.bolt.split("\"-")
n = float(rhs.split(" ")[0])
if ("-" in lhs):
d = float(eval(lhs.replace("-", "+")))
self.boltSpecs = self.boltBasics(d, n)
self.majDiaBox.configure(state='normal')
self.majDiaBox.delete(0, 'end')
self.majDiaBox.insert(0, format(self.boltSpecs['d'], '.4f'))
self.majDiaBox.configure(state='disabled')
self.minDiaBox.configure(state='normal')
self.minDiaBox.delete(0, 'end')
self.minDiaBox.insert(0, format(self.boltSpecs['dm'], '.4f'))
self.minDiaBox.configure(state='disabled')
self.pitchDiaBox.configure(state='normal')
self.pitchDiaBox.delete(0, 'end')
self.pitchDiaBox.insert(0, format(self.boltSpecs['dp'], '.4f'))
self.pitchDiaBox.configure(state='disabled')
else:
d = float(eval(lhs))
self.boltSpecs = self.boltBasics(d, n)
self.majDiaBox.configure(state='normal')
self.majDiaBox.delete(0, 'end')
self.majDiaBox.insert(0, format(self.boltSpecs['d'], '.4f'))
self.majDiaBox.configure(state='disabled')
self.minDiaBox.configure(state='normal')
self.minDiaBox.delete(0, 'end')
self.minDiaBox.insert(0, format(self.boltSpecs['dm'], '.4f'))
self.minDiaBox.configure(state='disabled')
self.pitchDiaBox.configure(state='normal')
self.pitchDiaBox.delete(0, 'end')
self.pitchDiaBox.insert(0, format(self.boltSpecs['dp'], '.4f'))
self.pitchDiaBox.configure(state='disabled')
def boltBasics(self, d, n):
P = 1.0 / n # in - thread pitch
dm = d - (1.299038 * P) # in - external thread minor diameter
dp = d - (0.649519 * P) # in - bolt pitch Diameter
return{'d': d, 'dm': dm, 'dp': dp}
class ChildWindow(tk.Toplevel):
def __init__(self, master):
tk.Toplevel.__init__(self, master)
self.frame = tk.Frame(self)
self.title('User Defined Bolt Info')
self.geometry('350x250')
self.focus_set()
rows = 0
while rows < 10:
self.rowconfigure(rows, weight=1)
self.columnconfigure(rows, weight=1)
rows += 1
self.boltName = tk.Label(self, text="Bolt Name (e.g. NewBolt1):")
self.boltName.grid(column=5, row=1, sticky='NSEW')
self.boltDia = tk.Label(self, text="Bolt Major Diameter [in]:")
self.boltDia.grid(column=5, row=3, sticky='NSEW')
self.boltTPI = tk.Label(self, text="Bolt Threads per Inch (TPI) [-]:")
self.boltTPI.grid(column=5, row=5, sticky='NSEW')
self.bName = tk.StringVar()
self.bDia = tk.StringVar()
self.bTPI = tk.StringVar()
self.nameInput = tk.Entry(self, textvariable=self.bName)
self.nameInput.insert(0, 'BoltName')
self.nameInput.grid(column=5, row=2, sticky='NSEW')
self.diaInput = tk.Entry(self, textvariable=self.bDia)
self.diaInput.insert(0, '0.0000')
self.diaInput.grid(column=5, row=4, sticky='NSEW')
self.tpiInput = tk.Entry(self, textvariable=self.bTPI)
self.tpiInput.insert(0, '0.0000')
self.tpiInput.grid(column=5, row=6, sticky='NSEW')
# Create button to save user defined bolt
self.saveBoltBtn = tk.Button(self, text='Save Bolt', command=self.saveBolt)
self.saveBoltBtn.bind('<Return>', self.saveBolt)
self.saveBoltBtn.grid(column=5, row=8, sticky='NSEW')
def saveBolt(self, *event):
self.master.data = {}
self.master.data['name'] = self.bName.get()
self.master.data['d'] = float(self.bDia.get())
self.master.data['n'] = float(self.bTPI.get())
self.master.do_somthing_with_data()
# NEED TO RETURN THIS DATA TO PARENT WINDOW
self.destroy()
def main():
MainGUI().mainloop()
if __name__ == '__main__':
main()
Solution 2:
i honestly didnt read all the code but to pass a input from your "ChildWindow" class to your "MainGUI" just do the following:
In your MainGUI class define a variable with the input you want either before your init function or in your init function (dont forget to declare self.your_variable).
def __init__(self):
self.input_from_child = None
Since you initialized the MainGUI in your "Main()" function, in your ChildWindow function you can just then change the variable:
app.input_from_child = "Whatever"
And then just use the variable inside the MainGUI class to do your calculations
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