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() 56
