# Tk_side_fill_expand_anchor.py

# Tk_side_fill_expand_anchor.py

from Tkinter import *

class MyApp:
    def __init__(self, parent):

        #------ constants for controlling layout of buttons ------
        button_width = 6
        button_padx = "2m"
        button_pady = "1m"
        buttons_frame_padx =  "3m"
        buttons_frame_pady =  "2m"
        buttons_frame_ipadx = "3m"
        buttons_frame_ipady = "1m"
        # -------------- end constants ----------------


        # set up Tkinter variables, to be controlled by the radio buttons
        self.button_name   = StringVar()
        self.button_name.set("C")

        self.side_option = StringVar()
        self.side_option.set(LEFT)

        self.fill_option   = StringVar()
        self.fill_option.set(NONE)

        self.expand_option = StringVar()
        self.expand_option.set(YES)

        self.anchor_option = StringVar()
        self.anchor_option.set(CENTER)


        # -------------- end constants ----------------

        self.myParent = parent
        self.myParent.geometry("640x400")

        ### Our topmost frame is called myContainer1
        self.myContainer1 = Frame(parent) ###
        self.myContainer1.pack(expand=YES, fill=BOTH)


        ### We will use HORIZONTAL (left/right) orientation inside myContainer1.
        ### Inside myContainer1, we create control_frame and demo_frame.

        # control frame - basically everything except the demo frame
        self.control_frame = Frame(self.myContainer1) ###
        self.control_frame.pack(side=LEFT, expand=NO,  padx=10, pady=5, ipadx=5, ipady=5)

        # inside control_frame we create a header label
        # and a buttons_frame at the top,
        # and demo_frame at the bottom

        myMessage="This window shows the effects of the \nexpand, fill, and anchor packing options.\n"
        Label(self.control_frame, text=myMessage, justify=LEFT).pack(side=TOP, anchor=W)

        # buttons frame
        self.buttons_frame = Frame(self.control_frame) ###
        self.buttons_frame.pack(side=TOP, expand=NO, fill=Y, ipadx=5, ipady=5)

        # demo frame
        self.demo_frame = Frame(self.myContainer1) ###
        self.demo_frame.pack(side=RIGHT, expand=YES, fill=BOTH)


        ### Inside the demo frame, we create top_frame and bottom_frame.
        ### These will be our demonstration frames.
        # top frame
        self.top_frame = Frame(self.demo_frame)
        self.top_frame.pack(side=TOP, expand=YES, fill=BOTH)  ###

        # bottom frame
        self.bottom_frame = Frame(self.demo_frame,
            borderwidth=5,  relief=RIDGE,
            height=50,
            bg="cyan",
            ) ###
        self.bottom_frame.pack(side=TOP, fill=X)


        ### Now we will put two more frames, left_frame and right_frame,
        ### inside top_frame.  We will use HORIZONTAL (left/right)
        ### orientation within top_frame.

        # left_frame
        self.left_frame = Frame(self.top_frame, background="red",
            borderwidth=5,  relief=RIDGE,
            width=50,
            ) ###
        self.left_frame.pack(side=LEFT, expand=NO, fill=Y)


        ### right_frame
        self.right_frame = Frame(self.top_frame, background="tan",
            borderwidth=5,  relief=RIDGE,
            width=250
            )
        self.right_frame.pack(side=RIGHT, expand=YES, fill=BOTH)


        # now put a button in each of the interesting frames
        button_names = ["A", "B", "C"]
        side_options = [LEFT, TOP, RIGHT, BOTTOM]
        fill_options = [X, Y, BOTH, NONE]
        expand_options = [YES, NO]
        anchor_options = [NW, N, NE, E, SE, S, SW, W, CENTER]


        self.buttonA = Button(self.bottom_frame, text="A")
        self.buttonA.pack()
        self.buttonB = Button(self.left_frame, text="B")
        self.buttonB.pack()
        self.buttonC = Button(self.right_frame, text="C")
        self.buttonC.pack()
        self.button_with_name = {"A":self.buttonA, "B":self.buttonB, "C":self.buttonC}

        # now we some subframes to the buttons_frame
        self.button_names_frame   = Frame(self.buttons_frame, borderwidth=5)
        self.side_options_frame   = Frame(self.buttons_frame, borderwidth=5)
        self.fill_options_frame   = Frame(self.buttons_frame, borderwidth=5)
        self.expand_options_frame = Frame(self.buttons_frame, borderwidth=5)
        self.anchor_options_frame = Frame(self.buttons_frame, borderwidth=5)

        self.button_names_frame.pack(  side=LEFT, expand=YES, fill=Y, anchor=N)
        self.side_options_frame.pack(  side=LEFT, expand=YES, anchor=N)
        self.fill_options_frame.pack(  side=LEFT, expand=YES, anchor=N)
        self.expand_options_frame.pack(side=LEFT, expand=YES, anchor=N)
        self.anchor_options_frame.pack(side=LEFT, expand=YES, anchor=N)

        Label(self.button_names_frame, text="\nButton").pack()
        Label(self.side_options_frame, text="Side\nOption").pack()
        Label(self.fill_options_frame, text="Fill\nOption").pack()
        Label(self.expand_options_frame, text="Expand\nOption").pack()
        Label(self.anchor_options_frame, text="Anchor\nOption").pack()

        for option in button_names:
            button = Radiobutton(self.button_names_frame, text=str(option), indicatoron=1,
                value=option, command=self.button_refresh, variable=self.button_name)
            button["width"] = button_width
            button.pack(side=TOP)

        for option in side_options:
            button = Radiobutton(self.side_options_frame, text=str(option), indicatoron=0,
                value=option, command=self.demo_update, variable=self.side_option)
            button["width"] = button_width
            button.pack(side=TOP)

        for option in fill_options:
            button = Radiobutton(self.fill_options_frame, text=str(option), indicatoron=0,
                value=option, command=self.demo_update, variable=self.fill_option)
            button["width"] = button_width
            button.pack(side=TOP)

        for option in expand_options:
            button = Radiobutton(self.expand_options_frame, text=str(option), indicatoron=0,
                value=option, command=self.demo_update, variable=self.expand_option)
            button["width"] = button_width
            button.pack(side=TOP)

        for option in anchor_options:
            button = Radiobutton(self.anchor_options_frame, text=str(option), indicatoron=0,
                value=option, command=self.demo_update, variable=self.anchor_option)
            button["width"] = button_width
            button.pack(side=TOP)

        self.cancelButtonFrame = Frame(self.button_names_frame)
        self.cancelButtonFrame.pack(side=BOTTOM, expand=YES, anchor=SW)

        self.cancelButton = Button(self.cancelButtonFrame,
            command=self.cancelButtonClick,
            text="Cancel", background="red",
            width=button_width,
            padx=button_padx,
            pady=button_pady
            )
        self.cancelButton.pack(side=BOTTOM, anchor=S)


        self.cancelButton.bind("<Return>", self.cancelButtonClick)

        # set up the buttons in their initial position
        self.demo_update()


    def button_refresh(self):
        button = self.button_with_name[self.button_name.get()]
        properties = button.pack_info()
        self.fill_option.set  (  properties["fill"] )
        self.side_option.set  (  properties["side"] )
        self.expand_option.set(  properties["expand"] )
        self.anchor_option.set(  properties["anchor"] )


    def demo_update(self):
        button = self.button_with_name[self.button_name.get()]
        button.pack(fill=self.fill_option.get()
            , side=self.side_option.get()
            , expand=self.expand_option.get()
            , anchor=self.anchor_option.get()
            )


    def cancelButtonClick(self):
        self.myParent.destroy()


root = Tk()
myapp = MyApp(root)
root.mainloop()