Graph to show Part of Model, editable etc. - by Graphviz ?

[lvk88]

BTW, it seems the standard Dependency Graph is not something by python, there is not an API or something similar which can be tweaked and reported in the Python Console?

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Gui.runCommand('Std_DependencyGraph',0)

Hey @paullee,

you can access the dependency graph in .dot format using:

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FreeCAD.ActiveDocument.DependencyGraph

This should return the string which is passed to dot when the dependency graph is to be visualized. I have a small macro that pipes this to xdot on Linux.

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#Before using, make sure xdot is installed
#pip3 install --user xdot

import xdot

graph = FreeCAD.ActiveDocument.DependencyGraph

window = xdot.DotWindow()
window.set_filter('dot')
window.set_dotcode(graph.encode())
window.connect('delete-event', xdot.ui.window.Gtk.main_quit)

See it in action:

xdot_depgraph_macro.gif (505.79 KiB) Viewed 1461 times

I really like this, because with the F key (or the search box in the toolbar), I can search for nodes in xdot, so it is possible to quickly navigate to stuff which is interesting. Also, arrows are hilighted, which is a bonus. Unfortunately, xdot does not allow for moving nodes, but there are other tools that support this feature also, e.g. qvge.

I don't think there is functionality in-place that allows for making graphs of sub-selections of the tree. Nevertheless, I would be very interested in implementing something like that if time allows. Are there any specs/ticket for this already?

[paullee]

you can access the dependency graph in .dot format using:

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FreeCAD.ActiveDocument.DependencyGraph

Excited to read this !
Would study your post in details !!!

[paullee]

Hmmm.... always installation problems

Probably not compatible with FreeCAD AppImage with python 3.8.6 ?

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>>> import xdot
Traceback (most recent call last):
  File "<input>", line 1, in <module>
ModuleNotFoundError: No module named 'xdot'

>>> sys.path.append("/home/paullee/.local/lib/python3.7/site-packages/")
>>> 
>>> import xdot
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/home/paullee/.local/lib/python3.7/site-packages/xdot/__init__.py", line 26, in <module>
    from . import ui
  File "/home/paullee/.local/lib/python3.7/site-packages/xdot/ui/__init__.py", line 3, in <module>
    from .window import DotWidget, DotWindow
  File "/home/paullee/.local/lib/python3.7/site-packages/xdot/ui/window.py", line 25, in <module>
    import gi
ModuleNotFoundError: No module named 'gi'
>>> 

[lvk88]

Hmmm.... always installation problems

Probably not compatible with FreeCAD AppImage with python 3.8.6 ?

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>>> import xdot
Traceback (most recent call last):
  File "<input>", line 1, in <module>
ModuleNotFoundError: No module named 'xdot'

>>> sys.path.append("/home/paullee/.local/lib/python3.7/site-packages/")
>>> 
>>> import xdot
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/home/paullee/.local/lib/python3.7/site-packages/xdot/__init__.py", line 26, in <module>
    from . import ui
  File "/home/paullee/.local/lib/python3.7/site-packages/xdot/ui/__init__.py", line 3, in <module>
    from .window import DotWidget, DotWindow
  File "/home/paullee/.local/lib/python3.7/site-packages/xdot/ui/window.py", line 25, in <module>
    import gi
ModuleNotFoundError: No module named 'gi'
>>> 

It looks like you are missing the gi module. Could you try to install these stuff?

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apt install gir1.2-gtk-3.0 python3-gi 

Source: xdot project page.

[paullee]

It looks like you are missing the gi module. Could you try to install these stuff?

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apt install gir1.2-gtk-3.0 python3-gi 

I see, but no luck ... I am on Fedora 31

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(base) [paullee@f31 topologic]$ dnf search gir1.2-gtk-3.0 python3-gi
Last metadata expiration check: 9 days, 21:04:43 ago on Sun 14 Mar 2021 04:55:17 AM CST.
No matches found.

[lvk88]

I see, but no luck ... I am on Fedora 31

Oh, sorry, I'm not familiar with Fedora... Maybe something like this?

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dnf install python-xdot

Let me know if this works!

[paullee]

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dnf install python-xdot

Let me know if this works!

Thanks, I think I had done -

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conda install -c conda-forge xdot

Your code also run. But still gi is missing. Dnf search python3-gi, python-gi but nothing.

[lvk88]

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dnf install python-xdot

Let me know if this works!

Thanks, I think I had done -

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conda install -c conda-forge xdot

Your code also run. But still gi is missing. Dnf search python3-gi, python-gi but nothing.

I'm sorry, I think I can't help you further with this :S

I even installed a Fedora 31 in a VirtualBox and managed to reproduce your issue, but I'm unsure how to make it work. I think the problem is that the AppImage version of FreeCAD comes with a bundled Python installation and therefore might ignore the system-wide installations of other python packages? I'm not sure how to help you further with this - maybe someone else on this forum knows? I'm also interested in the answer...

But, what should work at least is if you save the string that comes from FreeCAD.ActiveDocument.DependencyGraph to a file somewhere and open it with some other GraphViz editor.

[paullee]

Thanks indeed for helping so far

And hope partial display of dependency graph could be implemented

[paullee]

Are there any specs/ticket for this already?

Any idea @chrisb?

I have proposed the first point already quite some time ago. I think that could well be doable by giving only limited data to the external program (dot).
The second point would be great too, but that's probably rather not a FreeCAD thing.

Thanks.