paintman

#!/usr/bin/env python

import tkinter as tk
import tkinter.messagebox as messagebox

#############
# paintman - sanitised code sample demonstrating bug.

class MainWindow(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        master.title("Paintmgr") # References the Toplevel for the MainWindow
        self.master = master
        self.grid()
        self.create_widgets()

    def create_widgets(self):
        thiscol = 0
        tk.Label(self, text='Corner x').grid(row=0,column=thiscol)
        tk.Label(self, text='Corner y').grid(row=1,column=thiscol)
        tk.Label(self, text='Corner z').grid(row=2,column=thiscol)

        thiscol += 1
        self.xcoord = tk.Entry(self)
        self.xcoord.grid(row=0, column=thiscol)

        self.ycoord = tk.Entry(self)
        self.ycoord.grid(row=1, column=thiscol)

        self.zcoord = tk.Entry(self)
        self.zcoord.grid(row=2, column=thiscol)

        thiscol += 1
        tk.Button(self, text='Work on', command=self.WorkOnButtonAction).grid(row=0, column=thiscol)
        tk.Button(self, text='Quit',    command=self.QuitButtonAction).grid(  row=1, column=thiscol)

        for coliter in range(0,thiscol):
            self.columnconfigure(coliter, weight=1, pad=20)
        self.master.minsize(500,200)

    def QuitButtonAction(self):
        self.master.destroy()
    def WorkOnButtonAction(self):
        # Validate the original window's data before making a new window.
        # If the user gave invalid data, give a popup and stop.

        if not (    (self.xcoord.get().isdigit) and
                (self.ycoord.get().isdigit) and
                (self.zcoord.get().isdigit)):
            messagebox.showerror('Bad input', 'Input failed validation')
            return

        WorkOnWindow = tk.Toplevel()
        WorkOnWindow.title("Paimtmgr - Work")
        WorkOnWindow.grid()

        thiscol = 0
        tk.Label(WorkOnWindow, text=f'X:').grid(row=0, column=thiscol)
        tk.Label(WorkOnWindow, text=f'Y:').grid(row=1, column=thiscol)
        tk.Label(WorkOnWindow, text=f'Z:').grid(row=2, column=thiscol)
        tk.Label(WorkOnWindow, text=f'Status:').grid(row=3, column=thiscol)
        thiscol += 1

        tk.Button(WorkOnWindow, text='Fetch',   command=self.FetchButtonAction).grid(row=0, column=thiscol)
        tk.Button(WorkOnWindow, text='Edit',    command=self.EditButtonAction ).grid(row=1, column=thiscol)
        tk.Button(WorkOnWindow, text='Push',    command=self.PushButtonAction ).grid(row=2, column=thiscol)

        thiscol += 1
        tk.Label(WorkOnWindow, text='Close this window when done with it.\nPlease do not edit settings in the main window while using this one.\nPlease do not open multiples of this window.').grid(row=4, column=0, columnspan=5)

        for coliter in range(0,thiscol):
            WorkOnWindow.columnconfigure(coliter, weight=1, pad=20)
        WorkOnWindow.minsize(500,200)

    def FetchButtonAction(self):
        pass
    def EditButtonAction(self):
        pass
    def PushButtonAction(self):
        pass

root = tk.Tk()
app = MainWindow(master=root)
app.mainloop()