How to show message on preferences changed

mpetrasinovic · Post by **mpetrasinovic** » Fri Mar 27, 2020 6:56 pm

As a part of the custom workbench, I would like to inform a user when the value of the parameter in preference dialog for this workbench is changed that FreeCAD needs to be restarted. I could not find any python workbench with similar functionality implemented. Is there an easy way to do this from python?

mario52 · Post by **mario52** » Sat Mar 28, 2020 10:58 am

hi

here examples for read an save parameter

1: How do I get parameters to match.

2: How do I get parameters to match

mario

mpetrasinovic · Post by **mpetrasinovic** » Sat Mar 28, 2020 11:35 am

Hi mario,

Thank you for your response, but I need a way to call a function when the user changes the value of the parameter. I am not sure if there is a way to implement this callback.

Post by **openBrain** » Sat Mar 28, 2020 12:18 pm

You can connect slots to preferences input field signals and trigger an action accordingly.

mpetrasinovic · Post by **mpetrasinovic** » Sat Mar 28, 2020 2:34 pm

openBrain wrote: ↑Sat Mar 28, 2020 12:18 pm You can connect slots to preferences input field signals and trigger an action accordingly.

Could you please provide a code example for this?

Post by **openBrain** » Sat Mar 28, 2020 2:36 pm

mpetrasinovic wrote: ↑Sat Mar 28, 2020 2:34 pm Could you please provide a code example for this?

Please give details. Which parameter? Which workbench?

mpetrasinovic · Post by **mpetrasinovic** » Sat Mar 28, 2020 2:52 pm

I would like to implement this in my custom workbench (I will publish it soon). But I would like to see how to implement this for an input field in preferences from python.

Post by **openBrain** » Sat Mar 28, 2020 3:53 pm

mpetrasinovic wrote: ↑Sat Mar 28, 2020 2:52 pm I would like to implement this in my custom workbench (I will publish it soon). But I would like to see how to implement this for an input field in preferences from python.

Why just not write it in the preference dialog : something like "Need application restart" ?

Post by **Kunda1** » Sat Mar 28, 2020 4:37 pm

mpetrasinovic wrote: ↑Fri Mar 27, 2020 6:56 pm As a part of the custom workbench, I would like to inform a user when the value of the parameter in preference dialog for this workbench is changed that FreeCAD needs to be restarted. I could not find any python workbench with similar functionality implemented. Is there an easy way to do this from python?

This would also benefit the Addon Manager (https://github.com/FreeCAD/FreeCAD-addons/issues/95)

mpetrasinovic · Post by **mpetrasinovic** » Sat Mar 28, 2020 5:51 pm

openBrain wrote: ↑Sat Mar 28, 2020 3:53 pm Why just not write it in the preference dialog : something like "Need application restart" ?

This is the way it is now, but I think it would be better for users to open the message box if that is possible.

How to show message on preferences changed

How to show message on preferences changed

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