Creating a GUI

oh great John!

a few things to remember:
you probably want to be able to switch from relative to absolute. (how about commanded vrs actual)
not sure if you use metric and imperial but that needs some careful conversions especially if you plan to be able to set the origin from your DRO.
Though setting the origin to zero is safe and easy and maybe enough.

Glad your having fun - and can't wait to see your tutorial on it.
Chris

I've written up some documentation for the linuxcnc Python module.

www.linuxcnc.org/docs/2.5/html/common/python-interface.html

this is 'raw hide' - suggestions & improvements welcome.

- Michael

hey John I looked at your tutorial..

couple things I noticed maybe you already know...
in 3b the python code...
This is not needed:

# language stuff I think
import gettext
LOCALEDIR = os.path.join(BASE, "share", "locale")
gettext.install("linuxcnc", localedir=LOCALEDIR, unicode=True)
gtk.glade.bindtextdomain("linuxcnc", LOCALEDIR)
gtk.glade.textdomain("linuxcnc")
TCLPATH = os.environ

Also when putting the new screen in /bin you don't need to remove the .py part.
DISPLAY=gui3.py
will work.
The reason I mention this is if someone is testing it is nice if the editor knows the file is python.

great work though! is your plan to add it to the official docs ?

Michael

That is great documentation too!
It's very good to see documentation on some of the inner workings of linuxcnc - lowers the barrier for new developers.
(you actually make a habit of good documentation!)

have any idea how SPINDLE_CONSTANT works? I assume it means constant surface speed...

Chris M

cmorley wrote:

Michael

have any idea how SPINDLE_CONSTANT works? I assume it means constant surface speed...

Chris M

The linuxcnc forensics & reverse engineering department has determined it's a noop:

from git.linuxcnc.org/gitweb?p=linuxcnc.git;a...52410e7a786578#l1430

maybe Alex Joni can shed some light on this:

$ git blame src/emc/task/taskintf.cc
...
1d62729f (Alex Joni 2006-07-10 21:35:34 +0000 1421) int emcSpindleConstant()
1d62729f (Alex Joni 2006-07-10 21:35:34 +0000 1422) {
1d62729f (Alex Joni 2006-07-10 21:35:34 +0000 1423) return 0; // nothing to do
1d62729f (Alex Joni 2006-07-10 21:35:34 +0000 1424) }