import tkinter
from tkinter import *
from tkinter import messagebox




class LoginFrame(Frame):
    counter = 0
    def __init__(self, master):
        Frame.__init__(self, master)




        self.label_1 = Label(self, text="Username")
        self.label_2 = Label(self, text="Password")

        self.entry_1 = Entry(self)
        self.entry_2 = Entry(self, show="*")


        self.label_1.grid(row=0)
        self.entry_1.grid(row=0, column=1)
        self.label_2.grid(row=1)
        self.entry_2.grid(row=1, column=1)

        self.checkbox = Checkbutton(self, text="Keep me logged in")
        self.checkbox.grid(columnspan=2)

        self.logbtn = Button(self, text="Login", command=self.login_btn)
        self.logbtn.grid(columnspan=2)

        self.pack()


    def login_btn(self):
        #print("On click action/event")
        Username = self.entry_1.get()
        Password = self.entry_2.get()


        #print(username, password)

        if Username == "Lewis" and Password == "starwars10":
            messagebox.showinfo("Login Successful", "Welcome Lewis")
            self.counter += 1
            t = tkinter.Toplevel(self)
            t.wm_title("Window #%s" % self.counter)
            l = tkinter.Label(t, text="This is window #%s" % self.counter)
            l.pack(side="top", fill="both", expand=True, padx=100, pady=100)
            #TODO fix quit so that as one window opens old one closes
            #self.quit() # destroys login window
        else:
            messagebox.showerror("Login Incorrect", "Invalid Credentials")


root = Tk()
root.geometry("300x200")
lf = LoginFrame(root)

root.mainloop()