Yes you are right. I had forgotten about the gnome_canvas_*_affine
functions. I will probably be putting out a new version of pygtk and
gnome-python soon.
Here is the list of things I will be adding:
- gtk_ctree_new (I had gtk_ctree_new_with_titles but forgot this one)
- gnome_canvas_item_affine_relative
- gnome_canvas_item_affine_absolute
- Adding code so you can make exceptions cause the mainloop to exit (this
will be a runtime option). This way it should be easier to debug python
programs with pdb. The behaviour will probably be turned on by setting
PYGTK_FATAL_EXCEPTIONS to a non null value.
- fix up code so builddir != srcdir builds work properly.
If you think I have missed anything on this list, please tell me.
James Henstridge.
--
Email: [EMAIL PROTECTED]
WWW: http://www.daa.com.au/~james/
On Fri, 5 Mar 1999, Michael McLay wrote:
>
> The gnome-canvas looks like a good candidate for developing a simple
> viewer for printed circuit board graphics. The Python API is missing
> two important methods. It is possible to translate groups and nested
> groups, but it is not possible to scale or to rotate the groups. The
> code in the definitions file that is suppose to generate a scale and
> rotate funtion were commented out. The underlying gnome code
> had defined functions for rotate and scale, but they were not
> implemented. The gnome-canvas authors sent the following response to
> a query about what will be done with this code and what should be used
> to rotate and scale objects:
>
> Raph Levien writes:
> > Michael McLay wrote:
> > >
> > > In gnome-canvas.h gnome_canvas_item_rotate and gnome_canvas_item_scale
> > > are defined, but they are not implemented. It looks like the required
> > > art_affine_scale and art_affine_rotate functions have been defined in
> > > art_affine.c. Will they be implemented in a future release or is this
> > > a deprecated feature?
> > >
> > > This is a key feature of the canvas which I need for my application.
> >
> > You want to do a gnome_canvas_item_affine_relative (or maybe absolute,
> > depending on what you're trying to do), using the appropriate art_affine
> > functions to generate the affine transform.
> >
> > The g_c_i_rotate and _scale methods shouldn't be in the .h file.
> > Federico is planning to clean that stuff up soon.
> >
> > Good luck with your canvas app!
> >
> > Raph
>
> It looks like it won't be possible to simply generate a wrapper for an
> existing library call. Some additional code will be required to
> implement the rotate and scale functions. Or, perhaps the affine
> functions should be exposed in the Python API.
>
>
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