Enum CustomEvents

27_fltk/rust/fltk_ex/src/main.rs:17–22

#[derive(Debug, PartialEq, Eq, TryFromPrimitive)]
#[repr(i32)]
enum CustomEvents {
    AddOne = 41, // Values below 30 are reserved
    AddTwo,
    SubThree,
    OpenFile,
}

struct Adder {}