1 # Show how to do switchable panels.

     2 

     3 from Tkinter import *

     4 

     5 class App:

     6 

     7     def __init__(self, top=None, master=None):

     8         if top is None:

     9             if master is None:

    10                 top = Tk()

    11             else:

    12                 top = Toplevel(master)

    13         self.top = top

    14         self.buttonframe = Frame(top)

    15         self.buttonframe.pack()

    16         self.panelframe = Frame(top,  borderwidth=2, relief=GROOVE)

    17         self.panelframe.pack(expand=1, fill=BOTH)

    18         self.panels = {}

    19         self.curpanel = None

    20 

    21     def addpanel(self, name, klass):

    22         button = Button(self.buttonframe, text=name,

    23                         command=lambda self=self, name=name: self.show(name))

    24         button.pack(side=LEFT)

    25         frame = Frame(self.panelframe)

    26         instance = klass(frame)

    27         self.panels[name] = (button, frame, instance)

    28         if self.curpanel is None:

    29             self.show(name)

    30 

    31     def show(self, name):

    32         (button, frame, instance) = self.panels[name]

    33         if self.curpanel:

    34             self.curpanel.pack_forget()

    35         self.curpanel = frame

    36         frame.pack(expand=1, fill="both")

    37 

    38 class LabelPanel:

    39     def __init__(self, frame):

    40         self.label = Label(frame, text="Hello world")

    41         self.label.pack()

    42 

    43 class ButtonPanel:

    44     def __init__(self, frame):

    45         self.button = Button(frame, text="Press me")

    46         self.button.pack()

    47 

    48 def main():

    49     app = App()

    50     app.addpanel("label", LabelPanel)

    51     app.addpanel("button", ButtonPanel)

    52     app.top.mainloop()

    53 

    54 if __name__ == '__main__':

    55     main()