Adds 3DConnexion Device Button Map loading from XML file (#3065)

[SolidDude]

"3Dconnexion.xml" - at the moment temporarily I've put this file into src/Gui (I'm open for suggestions where such config files should go in the repository).
For use at run-time, the XML file should be copied into the folder containing the FreeCAD executable.
I'm investigating using App.getResourceDir() to place the file into a resources area for FreeCAD.

If the XML file is present, the button mappings for are preloaded into the Tools... Customize...Spaceball Buttons dialog.
If the XML file does not exist, no change in FreeCAD functionality occurs.

The XML file is designed to hold configurations for multiple types of 3Dconnexion mice.
Currently the code is hard-coded to load in the mappings for "SpacePilot Pro" - I need to investigate if the type of mouse can be provided by the spacenavd service; likewise for button held down duration.

[Kunda1]

Related PR: https://github.com/FreeCAD/FreeCAD/pull/3065

[josepablo.castro]

Related PR: https://github.com/FreeCAD/FreeCAD/pull/3065

Hi,

I am making an Open 3D Mouse as HOGP (HID Over Gap Profile, Bluetooth Low Energy)
I successfully manage to use the spacenavd on GNU/Linux with only modified the /etc/spnavrc file with this line:
device-id =1915:eeee

I am using a Nordic nRF52 chip for harware and, for the moment, using Nordic's VendorId.
In the future this will change for a VendorId I will get for the non-profit Foundation I am running in Costa Rica.

I want the Open 3D Mouse to work on Windows as well.

I am studying the source code in src/Guid/3Dconnexion and notice the hardcoded for the windows implementation.

It would be great if the windows implementation to be able to read the VendorId:ProductId from an external file or be able to add the VendorId:ProductId from the GUI interface as well.

Thanks and Best Regards,

Jose Pablo