[PyKDE] pyqt development snapshot built on windows

[Gerard Vermeulen]

On Mon, 26 May 2003 21:58:59 +0000
"Maxwell Sayles" <maxwellsayles at hotmail.com> wrote:

> ok.. fair enough... I'm using PyQt entirely for research purposes.  If the 
> project develops enough interest and we stay with PyQt, we will purchase a 
> commercial version, but for now we won't be distributing the application.
> 
> in any event, i'm still stuck.  ultimately i want to manipulate the pixels 
> in a QImage from a python C extension under windows. calling bits() and 
> passing the result to the extension would work, except that I'm so far 
> unable to build a version of PyQt under windows that supports the method 
> bits() in QImage.
> 
> is it possible to pass the python instance of a QImage to the extension and 
> have the extension convert it to a QImage* that I would be able to invoke 
> bits() on from the C extension?
> 
Sure.

But there are work arounds.

For instance, I am planning to write an image plot widget that takes
a 2D array of floating point values that are mapped to color values.

A first attempt in pure Python is here:
http://gerard.vermeulen.free.fr/examples/ImagePlotDemo.py.html
but it requires the Numerical Python extensions.

(I plan to do the mapping in C++, eventually, and I want to add
axes and a color scale).

The example is part of a PyQwt snapshot:
http://gerard.vermeulen.free.fr/PyQwt-20030526.tar.gz
but is missing from the exe installer that works with sip/PyQt-nc-3.6
http://gerard.vermeulen.free.fr/PyQwt_Qt230-20030526.win32-py2.2.exe


There are other possibilities, too. Search for PIL (Python Imaging Library)
on the PyKDE mailing list.

Gerard