Demo/tkinter/guido/switch.py

   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()