OOP, __index with __newindex?

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1

I’m trying to create an OOP module, but I would like CFrame and Size to be fired with __index and __newindex, but I’m having difficulties implementing __index with both the module dictionary AND the CFrame & Size values.

Any solutions?

2

What exactly are you trying to do with CFrame and Size? I’m quite new to metatables but i’ll try.

1 Like
3

Do you mean when Size and CFrame are changed, an event fires?

local part = workspace.Part 
local meta = setmetatable({}, {
    __index = function(tbl, index) 
    if index == 'Size' then 
            print('Size!') 
        elseif index == 'CFrame' then 
            print('CFrame!') 
        end
        return part 
    end;
    __newindex = function(tbl, index, value)
     if index == 'Size' then 
            print('Size!') 
        elseif index == 'CFrame' then 
            print('CFrame!') 
        end
        return part
    end;
})
meta.Size = Vector3.new(1,1,1) --> Size!
2 Likes
4

Yes, I’m trying to do what @7z99 is has right now, but I also want the metastable to be OOP’ed, or __index’ing a table called ‘MainModule’

5

Gotcha.

So inside of the empty table, we can create an event and use the event’s event using the table argument returned in the meta table.

local meta = setmetatable({[‘SizeChanged’] = Instance.new(‘RemoteEvent’).Event}, {
    __index = function(tbl, index) 
    if index == 'Size' then 
            print('Size!') 
        elseif index == 'CFrame' then 
            print('CFrame!') 
        end
        return part 
    end;
    __newindex = function(tbl, index, value)
     if index == 'Size' then 
            tbl.SizeChanged:Fire()
        return part
    end;
})

meta.SizeChanged:Connect(function()
    print('Size changed!')
end)

meta.Size = Vector3.new(1,1,1)

Sorry for weird formatting, I’m on mobile atm. Also sorry if it errors, not able to test atm.

1 Like
6

Oh alright, seems like it might work. Thanks.

1 Like