discuss.visual-prolog.com

Posted: **1 Mar 2024 7:50**

Dear Thomas!
There is a facts in implement listViewControl:

facts - lv_sorting_db
    ...
    sortingOrder : order := unsorting.
    sortingColumnNumber : unsigned := 0.

Is it possible to add a property to the listViewControl.i interface:

Code: Select all

properties
     sortingOrder: order.
     sortingColumnNumber : unsigned .

Then you can always know how the list in the listViewControl is sorted.
Every time I update Visual Prolog I do it myself, which is not a good solution.
Best regards, Faddey.

Posted: **1 Mar 2024 10:29**

No, I think that is a bad idea.

There are several ways to sort the items in a listViewControl and the mentioned facts are only used in some cases, with other sort methods the are misleading.

If the code was made today I don't think those facts would exist at all.

Anyway, your statement: "Then you can always know how the list in the listViewControl is sorted." is actually not correct. It may be correct for your applications, but if you sort the items using another method then these facts do not reflect anything.

Furthermore, if you continue to "export" the facts you should only "read" them, to set them you should call sortItems. So I suggest you make the properties out-only:

Code: Select all

properties
    sortingOrder : order (o).
    sortingColumnNumber : unsigned (o).

Posted: **1 Mar 2024 11:38**

Of course, these properties should only be external. I just forgot to add (o).
Best regards, Faddey.

discuss.visual-prolog.com

Add a property to the listViewControl

Add a property to the listViewControl

Re: Add a property to the listViewControl

Re: Add a property to the listViewControl