Getting notified of tool parameter changes?

Is there any way for my Python VCP to be notified if a tool is changed, say the tool offset is measured automatically by a toolsetter? I know one option would be to implement the tool database interface, but I think that would have to be a separate executable that then communicates with my VCP through some other means. I suppose I could watch the tool table file, but is there a better way?

People will know better than me but i think some pins shoud be set by your tool changer in iocontrol
linuxcnc.org/docs/html/config/iov2.html#_pins

• iocontrol.0.tool-changed (Bit, In) Should be driven TRUE when a tool change is completed.

You can try to connect to the signal/message "tool-info-changed" (linuxcnc.org/docs/2.9/html/gui/gstat.html#_messages).

That's great! So, what would the Python code to catch that look like?

EDIT: Oh! There's sample code at that link, sorry. Thanks!

HansU wrote:

You can try to connect to the signal/message "tool-info-changed" (linuxcnc.org/docs/2.9/html/gui/gstat.html#_messages).
 

Just a quick followup, this is exactly what I was hoping for, and works great, thank you!

The only minor caveat is that it's only called for the current tool (so if someone were to change and reload the tool table file for a tool not in the spindle, my code wouldn't get notified. But that's an edge case I can easily live with for now, probably forever. Also, current-tool-offset never seems to be sent, but that's also okay.

Current tool offset is sent if the offsets are changed or differ when changing between tools.
Did you observe it not working that way?

Finding offset changes on non loaded tools is more involved.
gladevcp's tooledit_widget does it.
github.com/LinuxCNC/linuxcnc/blob/2.8/li...ledit_widget.py#L236