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# file: runme.py
# This file illustrates the cross language polymorphism using directors.
import example
# CEO class, which overrides Employee::getPosition().
class PyCallback(example.Callback):
def __init__(self):
example.Callback.__init__(self)
def run(self):
print "PyCallback.run()"
def __del__(self):
print "PyCallback.__del__()"
# for shadow class extensions that are not "disowned" and
# define a __del__ method, it is very important to call the
# base class __del__. otherwise the c++ objects will never
# be deleted.
example.Callback.__del__(self)
# 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 "------------------------------------------"
# Lets 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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