from tkinter import *
from functools import partial

class DisplayHelp:
    def __init__(self, partner):
        self.help_box = Toplevel()
        self.help_box.title("Help / Info")
        partner.config(state=DISABLED)

        self.help_box.protocol('WM_DELETE_WINDOW', partial(self.close_help, partner))

        self.help_frame = Frame(self.help_box)
        self.help_frame.grid()

        Label(self.help_frame, text="Help / Info", font=("Arial", "14", "bold")).grid(row=0, pady=5)

        help_text = ("Enter the weight you wish to convert, then press "
                     "'To Kilograms' or 'To Pounds'.\n\n"
                     "0 is the minimum weight allowed.\n\n"
                     "Click 'History / Export' to view and save your calculations.")
        Label(self.help_frame, text=help_text, wraplength=300, justify="left").grid(row=1, padx=10)

        Button(self.help_frame, text="Dismiss", font=("Arial", "12", "bold"),
               command=partial(self.close_help, partner)).grid(row=2, pady=10)

    def close_help(self, partner):
        partner.config(state=NORMAL)
        self.help_box.destroy()

if __name__ == "__main__":
    root = Tk()
    root.title("Weight Converter")
    btn = Button(root, text="Help / Info")
    btn.config(command=lambda: DisplayHelp(btn))
    btn.pack(padx=20, pady=20)
    root.mainloop()