Prompt the defined COLL_* constants

[Rangi42]

Use something like the Fl_Input_Choice widget, but with the dropdown menu properly aligned with the whole input, and filtered to the ones starting with the current value.

If collision constants were read, new blocks could also be initialized to use the first one, instead of blank values.

[Rangi42]

A dropdown menu for all 109 COLL_* constants would also need to be scrollable with a max height, which FLTK does not support by default.

[Rangi42]

This would require a custom class extending Fl_Menu_Window.

[Rangi42]

See also:

• https://groups.google.com/g/fltkgeneral/c/f1b2UZJgqUg/m/8xtHm2qPGwAJ
• https://groups.google.com/g/fltkgeneral/c/oZruKd9Eaqc/m/fa6FYAn4DgAJ
• https://groups.google.com/g/fltkgeneral/c/dVWtMuUgGhw/m/s2QhUjc1AQAJ