from os import getcwd as pwd
import tkinter as tk

def tk_12():
    """Create a simple program that shows a drop-down list containing several
       colours and a Click Me button. When the user selects a colour from the list
       and clicks the button it should change the background of the window to that
       colour. For an extra challenge, try to avoid using an if statement to do this."""
    base_path = f"{pwd()}/tkgui/imgs"
    window = tk.Tk()
    window.title("Colores TK")
    window.geometry("380x400")

    title_icon = tk.PhotoImage(file = f"{base_path}/devfzn_64x64.png")
    window.iconphoto(False, title_icon)
    window["bg"] = "white"

    colours = [
            'dark slate gray',
            'slate gray',
            'cornflower blue',
            'dodger blue',
            'deep sky blue',
            'dark turquoise',
            'pale goldenrod',
            'tomato',
            'violet red',
            'purple',
            'DarkOrchid2',
            'DarkOrchid4',
            ]

    lbl_info = tk.Label(text="COLORES", font="Verdana 50")
    lbl_info["bg"] = "white"
    lbl_info.place(x=40, y=25, width=300, height=75)

    lst_color = tk.Listbox()
    for i, color in enumerate(colours):
        lst_color.insert(i, color)
    lst_color["justify"] = "center"
    lst_color.place(x=40, y=160, width=300, height=220)

    def apply_color():
        try:
            color = lst_color.curselection()[0]
            window["bg"] = colours[color]
            lbl_info["bg"] = colours[color]
        except IndexError:
            window["bg"] = "white"
            lbl_info["bg"] = "white"
        lst_color.focus()

    btn_chng_color = tk.Button(text="Aplicar Color", command=apply_color)
    btn_chng_color.place(x=40, y=110, width=300, height=35)
    btn_chng_color.focus()

    window.mainloop()