Add straight line draw option.

[borys-upco]

If you'd like to put out an incentive for implementing this feature, you can do so at https://issuehunt.io/r/bk138/gromit-mpx
Hi first thanks for great tool for my desktop!

Is your feature request related to a problem? Please describe.
This is not a problem. This is feature request.

Describe the solution you'd like
Add an option to draw straight lines. This is often an option in graphical editors when a line tool has the option to draw perfect straight lines. This could be achieved by checking if in example [SHIFT] key is pressed while drawing a line and if yes draw a straight line.

Describe alternatives you've considered
I found nothing else for this use case. I tried another tools but Gromit-MPX works best with my work station setup.Ubuntu 20 + Regolith Desktop (i3)

Additional context
I'm not good with drawing using a mouse, and without digital drawing tool it is very hard to make nice line.
If this could be extended to have another geometrical shapes tool it would be great. But having a straight line option is great on its own.

[bk138]

Thanks for your request. This has already been requested in #67, feel free to subcribe there. Also, please take the time to search for existing issues :-)

[borys-upco]

Sorry somehow I overlooked the already created issue.

[bk138]

No problem :-)