Re: Array widget in Display Builder

["Kasemir, Kay via Tech-talk" <tech-talk at aps.anl.gov>]

>So, If I want to have an EMPTY array of size 30 what I have to do?

>I do not want to change the size of this array. What I want is to write sometimes 3 elements, and sometimes empty it (keeping size of 30).  

>Maybe I should use a Table widget instead?

We might mix our nomenclature when it comes to size/length/capacity.

For the array widget, they're all the same and fixed.

"Size 30" means there are always 30 elements.

'EMPTY' would mean no elements, size=length=0, while capacity may still be 30.

The array widget doesn't support that. You could set the array to [ 0, 0, 0, 0, ..., 0 ] with 30 x [0], but not EMPTY as in [].

Yes, for a display, you could use a table widget, but that requires a (small) script to transform the array data from the PV into the rows/columns of the table.

-Kay