from tkinter import *

root = Tk()
root.geometry("700x400")
root.resizable(0, 0)
root.config(bg="#d9ead3")
root.title("Densidade Populacional")


def limpar():
    populacao_entrada.delete(0, END)
    area_entrada.delete(0, END)
    resultado.set("")


def calcular_densidade():
    try:
        pop = float(populacao.get())
        area = float(area_entrada.get())

        if area == 0:
            mensagem = "Erro: A área não pode ser zero."
        else:
            densidade = pop / area
            mensagem = f"A densidade populacional é de {round(densidade, 2)} hab./km²"
    except ValueError:
        mensagem = "Por favor, insere valores numéricos válidos."

    resultado.set(mensagem)


titulo = Label(root, text="Calcular a Densidade Populacional",
               font=("Arial", "22", "bold"), bg="#d9ead3", fg="#bf9000")
titulo.place(relx=0.1, rely=0.05)

texto_sub1 = Label(root, text="População total:",
                   font=("Arial", "16", "bold"), bg="#d9ead3", fg="#bf9000")
texto_sub1.place(relx=0.15, rely=0.25)

texto_sub2 = Label(root, text="Área total (km²):",
                   font=("Arial", "16", "bold"), bg="#d9ead3", fg="#bf9000")
texto_sub2.place(relx=0.15, rely=0.4)

populacao = StringVar()
populacao_entrada = Entry(root, textvariable=populacao,
                          font=("Arial", "12", "bold"),
                          bg="white", fg="blue", justify='center')
populacao_entrada.place(relx=0.45, rely=0.26, relwidth=0.4)

area_entrada = StringVar()
volume_entrada = Entry(root, textvariable=area_entrada,
                       font=("Arial", "12", "bold"),
                       bg="white", fg="blue", justify='center')
volume_entrada.place(relx=0.45, rely=0.42, relwidth=0.4)

but1 = Button(root, text="Verificar", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'), command=calcular_densidade)
but1.place(relx=0.05, rely=0.6, relwidth=0.28, relheight=0.1)

but_limpar = Button(root, text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.36, rely=0.6, relwidth=0.28, relheight=0.1)

but_sair = Button(root, text="Sair", bd=2, bg='#107db2', fg='white',
                  font=('verdana', 12, 'bold'), command=root.destroy)
but_sair.place(relx=0.67, rely=0.6, relwidth=0.28, relheight=0.1)

resultado = StringVar()
resultado_texto = Label(root, textvariable=resultado,
                        font=("Arial", 12, "bold"), bg="#cfe2f3", fg="#000000")
resultado_texto.place(relx=0.05, rely=0.8, relwidth=0.9, relheight=0.1)

root.mainloop()