[GRASS-dev] Modules

[Jáchym Čepický]

hi Glynn,

2007/2/21, Glynn Clements <glynn at gclements.plus.com>:
>
> Moritz Lennert wrote:
>
> > >> It's looking as if the most practical replacement is going to be to
> > >> take the existing v.digit, and replace R_*, D_* and Tcl_* with a real
> > >> GUI toolkit.
> > >
> > > To this end, I've started refactoring v.digit in the hope of making it
> > > easier to use a conventional GUI toolkit.
> > >
> > > So far, I've modified attr.c and line.c, corresponding to the
> > > following "tools":
> > >
> > >     copy cats
> > >     display attributes
> > >     display cats
> > >     new line
> > >     edit line
> > >     move line
> > >     delete line
> > >
> > > Although I've tried to test it as much as possible, I'm not
> > > particularly familar with v.digit (never having used it before this
> > > week), so I would appreciate it if people who are familiar with it
> > > could check that I haven't broken anything (there shouldn't be any
> > > user-visible differences as a result of the changes).
> >
> > How is this to be understood in relation to v.edit ? Are these
> > complementary ?
>
> It doesn't have any relation to v.edit.
>
> It's related to the possibility of changing v.digit's GUI toolkit from
> libraster to something else while retaining the remainder of v.digit.
> Essentially, v.digit would behave in an identical manner, but wouldn't
> use XDRIVER.
>
> I don't have any specific toolkit in mind, but every "real" GUI
> toolkit (Xt, GTK, Qt, Win32, MFC, wxWidgets, Tk ...) is event driven,
> compared to the modal polling loop of R_get_location_with_*. So, I'm
> restructuring v.digit into a form which is more suitable for such a
> toolkit.
>
> Personally, I'm not sure that writing a replacement digitiser using
> v.edit is feasible. Based upon Radim's comments and what I've gleaned
> from the v.digit code, you need a monolithic process. Otherwise, you
> end up having to re-import the entire map after each change.
>

the idea was to have toolbar in new python-based map display, which
would have the tools for digitizing.

if it would be possible to write some class in C++, which would return
wx Toolbar accessable from python, that it would be great..

jachym
-- 
Jachym Cepicky
e-mail: jachym.cepicky gmail com
URL: http://les-ejk.cz
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