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# file: runme.py
# This file illustrates the cross language polymorphism using directors.
import example
class PyCallback(example.Callback):
def __init__(self):
example.Callback.__init__(self)
def run(self):
print("PyCallback.run()")
# Create an Caller instance
caller = example.Caller()
# Add a simple C++ callback (caller owns the callback, so
# we disown it first by clearing the .thisown flag).
print("Adding and calling a normal C++ callback")
print("----------------------------------------")
callback = example.Callback()
callback.thisown = 0
caller.setCallback(callback)
caller.call()
caller.delCallback()
print("")
print("Adding and calling a Python callback")
print("------------------------------------")
# Add a Python callback (caller owns the callback, so we
# disown it first by calling __disown__).
caller.setCallback(PyCallback().__disown__())
caller.call()
caller.delCallback()
print("")
print("Adding and calling another Python callback")
print("------------------------------------------")
# Let's do the same but use the weak reference this time.
callback = PyCallback().__disown__()
caller.setCallback(callback)
caller.call()
caller.delCallback()
# All done.
print("")
print("python exit")
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