macOS Changing an MSMatrix object

[arjena]

I'm trying to change the user interface of a project found on Sourgeforge (control panel for the velleman K8055 USB interface kit). The element I want to change is a matrix object of 8 check boxes. Now they are set in a 2-row 4-column arrangement, I want them in one column so I can add meaningful labels in stead of 1, 2, 3 etc. But when I change the layout I seem to loose the functionality of the buttons. When I make a new set of buttons (make one, embed in matrix, hold alt and drag till I have eight) en link the MSMatrix object like the original one was linked only two buttons work: the first and the last, corresponding to the first two buttons in functionality. I must be missing something...
To a seasoned programmer this is probably obvious, but my programming skills are mainly limited to writing C code for PIC microprocessors. No GUI there.
If all this does not sound too gibberish, can someone point me in the right direction?

Thanks,

Arjen

 

[robvas]

Have you looked at: http://cocoadev.com/wiki/NSMatrix

 

[arjena]

I had not, I have now. Thanks for the tip.
But after reading this page I still don't know how to solve the problem. This sentence:

An NSMatrix is like a spreadsheet; you can select a single cell or discontiguous group of cells regardless of row/column.

makes me think it should work regardless whether I make the object 2 rows 4 columns or a singel column with 8 rows. But it does not, so I must be missing something...
I'd be glad to attach my Xcode project but I'n not sure if that is allowed on this forum.

 

[arjena]

I read through the code (again) but all I can find is this on how the cells in the matrix are addressed:

for(count=0;count<8;count++)
				[[pOutput cellWithTag:count] setEnabled:FALSE];

Of course the cells are addressed more often, but always in this way. So I assume the cells must have an id (tag) from 0 to 8, but I cannot find how to attach an id to the cells. 'identifier' is set to automatic so shouldn't it just work?

 

[arjena]

I managed to get it working by replacing all occurrences of cellWithTag with cellAtRow: Column:. This was simple to do since I changed the matrix to one column with 8 rows. This was inspired by the page at cocoadev btw, so thanks again for that link.
Being the curious type I still would like to know why cellWithtag did not work for the existing matrix, but not for the modified or new matrix.

 

[lee1210]

At first blush, my guess is there were tags in the original matrix, and when you rearranged it you really created new cells, you didn't move the originals, including tags.

-Lee

 

[arjena]

That's also my guess, it's just that I could not find any reference to any tag within the matrix. When I select a single cell it's identifier is set to Automatic and everything else seems to be default too.
How/where do I find if and what tags are assigned to cells?

Cheers,

Arjen