import tkinter as tk
import datetime
import time

LARGE_FONT = ("Verdana", 12)


# The code for changing pages was derived from: http://stackoverflow.com/questions/7546050/switch-between-two-frames-in-tkinter
# License: http://creativecommons.org/licenses/by-sa/3.0/

class SeaofBTCapp(tk.Tk):

    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)

        container.pack(side="top", fill="both", expand=True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for F in (StartPage, PageOne, PageTwo):
            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):
        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Start Page", font=LARGE_FONT)
        label.pack(pady=10, padx=10)

        button = tk.Button(self, text="Visit Page 1",
                           command=lambda: controller.show_frame(PageOne))
        button.pack()

        button2 = tk.Button(self, text="Visit Page 2",
                            command=lambda: controller.show_frame(PageTwo))
        button2.pack()

        # newbutt = tk.Button(self, text="New Button", command=lambda: self.myCallback(self.clock(newbutt)))
        newbutton = tk.Button(self, text="New Button", command=lambda: self.UpdateWidget(newbutton))
        newbutton.pack()

    # def myCallback(self, callback=None):
    #    if callback:
    #        callback()


    def clock(self, el):
        currenttime = datetime.datetime.now().strftime("Time: %H:%M:%S")
        el.config(text=currenttime)

    # this function pipes input to an widget
    def UpdateWidget(self, widget):
        word = "hello"
        for i in word:
            print(i)
            widget.update()
            time.sleep(0.5)
            widget.config(text=str(i))



# Get text updating in realtime with current url:
# Pass callback function into Sanner
# Execute callback everytime new url is navigated to

class PageOne(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Page One!!!", font=LARGE_FONT)
        label.pack(pady=10, padx=10)

        button1 = tk.Button(self, text="Back to Home",
                            command=lambda: controller.show_frame(StartPage))
        button1.pack()

        button2 = tk.Button(self, text="Page Two",
                            command=lambda: controller.show_frame(PageTwo))
        button2.pack()


class PageTwo(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Page Two!!!", font=LARGE_FONT)
        label.pack(pady=10, padx=10)

        button1 = tk.Button(self, text="Back to Home",
                            command=lambda: controller.show_frame(StartPage))
        button1.pack()

        button2 = tk.Button(self, text="Page One",
                            command=lambda: controller.show_frame(PageOne))
        button2.pack()


app = SeaofBTCapp()
app.mainloop()
