'[PyKDE] Filling QPixmap from C code'

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List:       pykde
Subject:    [PyKDE] Filling QPixmap from C code
From:       "Giaco777" <giaco777 () gmx ! de>
Date:       2003-04-16 7:23:02
[Download RAW message or body]

Hi PyQters,

first of all I would like to thank Phil for this great RAD environment
for QT. 

In my application I would like a QPixmap generated by PYQt
to be filled by a C subroutine. My first try would look like this (in principal):

Python:

qp=QPixmap(...)
fillQPixmap(qp)     # this is realized in C

C:

// this is the C subroutine which fills QPixmap
static PyObject *fillQPixmap(PyObject *self, PyObject *args) {
    PyObject * po;
    if(!PyArg_ParseTuple(args, "O", &po)) return NULL;

    // interpret object as QPixmap pointer
   QPixmap *pm = (QPixmap*) PyCObject_AsVoidPtr(po); 

   // do something with pm

   Py_INCREF(Py_None);
   return Py_None; 
}

Is there a chance that this will work or is there a better solution?

Thanks
Joachim

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<DIV><FONT face=Arial size=2>Hi PyQters,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>first of all I would like to thank Phil for this 
great RAD environment</FONT></DIV>
<DIV><FONT face=Arial size=2>for QT. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>In my application I would like a QPixmap generated 
by PYQt</FONT></DIV>
<DIV><FONT face=Arial size=2>to be filled by a C subroutine. My first try would 
look like this (in principal):</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Python:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>qp=QPixmap(...)</FONT></DIV>
<DIV><FONT face=Arial size=2>fillQPixmap(qp)&nbsp;&nbsp;&nbsp;&nbsp; # this is 
realized in C</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>C:</FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT face=Arial 
size=2></FONT></FONT></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>// this is the C subroutine which fills 
QPixmap</FONT></DIV><FONT face=Arial size=2><FONT color=#0000ff size=2>
<DIV><FONT color=#000000>static</FONT></FONT><FONT size=2> PyObject 
*fillQPixmap(PyObject *self, PyObject *args) {</DIV>
<DIV>&nbsp;&nbsp;&nbsp; PyObject * po;</DIV>
<DIV></FONT><FONT color=#0000ff size=2>&nbsp;&nbsp;&nbsp; if</FONT><FONT 
size=2>(!PyArg_ParseTuple(args, "O", &amp;po)) </FONT><FONT color=#0000ff 
size=2>return</FONT><FONT size=2> NULL;</FONT></DIV>
<DIV><FONT size=2>&nbsp;</DIV>
<DIV></FONT><FONT color=#008000 size=2>&nbsp;&nbsp;&nbsp; // interpret object as 
QPixmap pointer</FONT><FONT color=#008000 size=2></DIV></FONT><FONT size=2>
<DIV>&nbsp;&nbsp; QPixmap *pm = (QPixmap*) PyCObject_AsVoidPtr(po); </DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp; // do something with pm</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;&nbsp; Py_INCREF(Py_None);</DIV>
<DIV></FONT><FONT color=#0000ff size=2>&nbsp;&nbsp; return</FONT><FONT size=2> 
Py_None; </DIV>
<DIV>}</DIV></FONT></FONT>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Is there a chance that this will work or is there a 
better solution?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Thanks</FONT></DIV>
<DIV><FONT face=Arial size=2>Joachim</FONT></DIV></BODY></HTML>

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