from tkinter import *
from functools import partial

class DisplayHelp:
    def __init__(self, partner):
        background = "#ffe6cc"
        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, width=300, height=200)
        self.help_frame.grid()

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

        help_text = ("To use the program, simply enter the weight "
                     "you wish to convert and then choose to convert "
                     "to either Kilograms (KGS) or Pounds (LBS).\n\n"
                     "Note that 0 KG/LBS is the smallest possible weight. "
                     "If you try to convert a weight less than 0 KG/LBS "
                     "you will get an error message.\n\n"
                     "To see your calculation history and export it to a "
                     "text file, please click the 'History / Export' button.")

        self.help_text_label = Label(self.help_frame, text=help_text,
                                     wraplength=350, justify="left")
        self.help_text_label.grid(row=1, padx=10)

        self.dismiss_button = Button(self.help_frame, text="Dismiss",
                                     font=("Arial", "12", "bold"),
                                     bg="#CC6600", fg="#FFFFFF",
                                     command=partial(self.close_help, partner))
        self.dismiss_button.grid(row=2, padx=10, pady=10)

        for item in [self.help_frame, self.help_heading_label, self.help_text_label]:
            item.config(bg=background)

    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", bg="#CC6600", fg="#FFFFFF",
                 font=("Arial", "12", "bold"))
    btn.config(command=lambda: DisplayHelp(btn))
    btn.pack(padx=20, pady=20)
    root.mainloop()