Show how to do switchable panels.
diff --git a/Demo/tkinter/guido/switch.py b/Demo/tkinter/guido/switch.py
new file mode 100644
index 0000000..7944039
--- /dev/null
+++ b/Demo/tkinter/guido/switch.py
@@ -0,0 +1,54 @@
+# Show how to do switchable panels.
+
+from Tkinter import *
+
+class App:
+
+ def __init__(self, top=None, master=None):
+ if top is None:
+ if master is None:
+ top = Tk()
+ else:
+ top = Toplevel(master)
+ self.top = top
+ self.buttonframe = Frame(top)
+ self.buttonframe.pack()
+ self.panelframe = Frame(top, borderwidth=2, relief=GROOVE)
+ self.panelframe.pack(expand=1, fill=BOTH)
+ self.panels = {}
+ self.curpanel = None
+
+ def addpanel(self, name, klass):
+ button = Button(self.buttonframe, text=name,
+ command=lambda self=self, name=name: self.show(name))
+ button.pack(side=LEFT)
+ frame = Frame(self.panelframe)
+ instance = klass(frame)
+ self.panels[name] = (button, frame, instance)
+ if self.curpanel is None:
+ self.show(name)
+
+ def show(self, name):
+ (button, frame, instance) = self.panels[name]
+ if self.curpanel:
+ self.curpanel.pack_forget()
+ self.curpanel = frame
+ frame.pack(expand=1, fill="both")
+
+class LabelPanel:
+ def __init__(self, frame):
+ self.label = Label(frame, text="Hello world")
+ self.label.pack()
+
+class ButtonPanel:
+ def __init__(self, frame):
+ self.button = Button(frame, text="Press me")
+ self.button.pack()
+
+def main():
+ app = App()
+ app.addpanel("label", LabelPanel)
+ app.addpanel("button", ButtonPanel)
+
+if __name__ == '__main__':
+ main()