[PyKDE] SIP...Need help
phil at riverbankcomputing.co.uk
Mon Jan 16 09:44:58 GMT 2006
On Saturday 14 January 2006 11:04 pm, computernet2000 at mail.bg wrote:
> Hi all !
> We try to create binding for Ultimate++ lib
> have most of widgets and non-gui classes (~70%)
> without Callback system :(
> We using SIP to wrap the code.
> this is a simple code ...
> Callback TheBack::THE_Callback(void *args)
> typedef TheBack CLASSNAME;
> PyObject *p = (PyObject *)args;
> return callback1(this, &CLASSNAME::py_call,(void
> void TheBack::py_call(void *data)
> PyObject *p = (PyObject *)data;
> PyObject *func = PyTuple_GetItem(p, 0);
> PyObject *args = PyTuple_GetItem(p, 1);
> PyObject *kw = PyTuple_GetItem(p, 2);
> PyObject_Call(func, args, kw);
> "return THISBACK1(py_call, (void *)p)"
> This line is part from the Callback system,
> take a pointer-function and return Callback object.
> In Python i want wrap something like this :
> def test(*args, **kw):
> print "bla-bla"
> module.THE_Callback(test,"some args...")
> After that, call the Python function and pass her into
> but this not work.I dont know how to implement this in SIP.
> In the moment "*args" from "module.THE_Callback" is not a
> valid python-function argument
> Question is :
> How to wrap this method "THE_Callback(void *args)" in SIP ?
You have to use handwritten code. You could look at the implementation of
qInstallMsgHandler() in PyQt as a simple example of passing a Python callable
as a C++ callback. The general approach is to provide a single C++ callback
and a data structure that enables that callback to select the correct Python
callable. This can only work if the library being wrapped supplies enough
information to enable the C++ callback to identify the correct Python
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