Initial commit of Octave module.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10290 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/octave/callback/Makefile

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+TOP        = ../..
+SWIG       = $(TOP)/../preinst-swig
+CXXSRCS    = example.cxx
+TARGET     = example
+INTERFACE  = example.i
+LIBS       = -lm
+SWIGOPT    = 
+
+all::
+	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' octave_cpp
+
+static::
+	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='myoctave' INTERFACE='$(INTERFACE)' octave_cpp_static
+
+clean::
+	$(MAKE) -f $(TOP)/Makefile octave_clean
+	rm -f $(TARGET).py
+
+check: all

Examples/octave/callback/example.cxx

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+/* File : example.cxx */
+
+#include "example.h"
+

Examples/octave/callback/example.h

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+/* File : example.h */
+
+#include <cstdio>
+#include <iostream>
+
+class Callback {
+public:
+	virtual ~Callback() { std::cout << "Callback::~Callback()" << std:: endl; }
+	virtual void run() { std::cout << "Callback::run()" << std::endl; }
+};
+
+
+class Caller {
+private:
+	Callback *_callback;
+public:
+	Caller(): _callback(0) {}
+	~Caller() { delCallback(); }
+	void delCallback() { delete _callback; _callback = 0; }
+	void setCallback(Callback *cb) { delCallback(); _callback = cb; }
+	void call() { if (_callback) _callback->run(); }
+};
+

Examples/octave/callback/example.i

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+/* File : example.i */
+%module(directors="1") example
+%{
+#include "example.h"
+%}
+
+%include "std_string.i"
+
+/* turn on director wrapping Callback */
+%feature("director") Callback;
+
+%include "example.h"
+

Examples/octave/callback/runme.m

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+# file: runme.m
+
+# This file illustrates the cross language polymorphism using directors.
+
+example 
+
+OctCallback=@() subclass(example.Callback(), \
+			 'run',@(self) printf("OctCallback.run()\n"));
+
+# Create an Caller instance
+
+caller = example.Caller();
+
+# Add a simple C++ callback (caller owns the callback, so
+# we disown it first)
+
+printf("Adding and calling a normal C++ callback\n");
+printf("----------------------------------------\n");
+
+callback = example.Callback().__disown();
+caller.setCallback(callback);
+caller.call();
+caller.delCallback();
+
+printf("Adding and calling a Octave callback\n");
+printf("------------------------------------\n");
+
+# Add a Octave callback (caller owns the callback, so we
+# disown it first by calling __disown).
+
+caller.setCallback(OctCallback().__disown())
+caller.call();
+caller.delCallback();
+
+printf("Adding and calling another Octave callback\n");
+printf("------------------------------------------\n");
+
+# Let's do the same but use the weak reference this time.
+
+callback = OctCallback().__disown();
+caller.setCallback(callback);
+caller.call();
+caller.delCallback();
+
+# careful-- using callback here may cause problems; octave_swig_type still
+# exists, but is holding a destroyed object (the C++ example.Callback).
+# to manually drop the octave-side reference, you can use
+clear callback;
+
+# Let's call them directly now
+
+printf("Calling Octave and C++ callbacks directly\n");
+printf("------------------------------------------\n");
+
+a = OctCallback();
+a.run();
+a.Callback.run();
+
+
+# All done.
+
+printf("octave exit\n");
+