Several ideas to improve
Interesting program however need to be improved in order to make it more useful:
1st- Support for dxf export (ready for cutting on Cnc)
2nd- Add scrap values from the edge (with different X-Y values)
3rd- i.e. 6 pieces 1000x400mm (with disk thickness=20) the 6 pieces should be drawn with no gap in between.
4th- Import from txt is it possible?
5th- Avoid mouse for manual filling data: when using keyboard the arrows must open the field (no need for mouse click on that field)
6th- Path for importing/exporting data should be remembered (don't know if now is possible)
7th- Info: Percentual of waste for every sheet