Graphic out

[Wirdal]

R has been saving the plots of whatever it runs, but can't display, within the local directory.

What I do is just call the user-supplied 'open' function on the pdf that gets created when the user wants to. The command is in a dropdown window, so the user can select when to see their output.

I have tested it on my Ubuntu laptop, as well as my Windows desktop. They work fine. I added some error validation if the 'open' command does not work, OR if the PDF containing the graph does not exist.

I would like to do two more things with this.

1. Save old graphs, and allow lookback for them
2. Have TKinter actually open them within its own GUI. I think this would create some more speed, just so the OS does not have to start another program. I don't think Tkinter has any built-in PDF support, however. So stripping out the image from the PDF and converting it to something the GUI can load would be necessary, if we're not to add any additional dependencies.

[Wirdal]

Also, I see that many students don't generally call omsi with all the arguments on the command line. I think it would be good to have an option where they can add their preferred way of opening the PDFs while omsi is still running.