Is there a way to change how specific types are displayed?

[kpa28-git]

Specifically I had problems with how StructArrays are displayed with custom struct types, but I wanted to know if there was a simple way to customize how things are displayed in general.

Issues related to StructArrays have been fixed to the point where everything displays without error, but the interactive inspector only works for NamedTuple StructArrays (#792 #1935 #2324). The interactive inspector is nice, but I don't need it. If I could display StructArray{<:MyType} in a more terse way, that is enough for me.

I tried implementing a Base.show for StructArray{<:MyType} some time ago but it didn't affect how the type was displayed in Pluto.

Here is an example of how it works right now:

using StructArrays

struct MyType
   a::Int
   b::Char
end

StructArray{MyType}(a=[1,3,5], b=['a', 'c', 'e'])

Displays:

3-element StructArray(::Vector{Int64}, ::Vector{Char}) with eltype MyType:
MyType(1, 'a')
MyType(3, 'c')
MyType(5, 'e')

The specific change I want is to not have the MyType constructor printed on each line, just at the top. I want something more table-like if possible, with alignment and stuff. I could override how it displays myself, but I don't know what hook to use or if there is one intended for use by pluto users.

If someone could help me or direct me to solving the general or specific problem I'd appreciate it!

[kpa28-git]

Overriding Base.show works and affects how pluto displays StructArrays. I was overriding the wrong method before.
You have to overwride function Base.show(io::IO, ::MIME"text/plain", v::MyVector{<:MyType}).
See this answer: https://stackoverflow.com/questions/58962304/how-to-overload-base-show-for-custom-array-types

Outside of the interactive inspector stuff, this doesn't seem to have anything to do with pluto.