FNCDataGrid checkboxes not able to be clicked

WEB TMS WEB Core
1

Hi,

I have set up a blank project with a TMSFNCDatagrid and added the following routines:

procedure TForm2.TMSFNCDataGrid1GetCellClass(Sender: TObject; AColumn,
ARow: Integer; var ACellClass: TTMSFNCDataGridCellClass);
begin
if AColumn=0 then
  ACellClass:=TTMSFNCDataGridCheckBoxCell;
end;

procedure TForm2.WebFormShow(Sender: TObject);
begin
  TMSFNCDataGrid1.Columns.Add;
  TMSFNCDataGrid1.AddCheckBoxColumn(TMSFNCDataGrid1.ColumnCount-1);
end;

I am unable to click checkboxes in either column.

Thanks!

2

Project1.zip (11.1 KB)
I cannot reproduce this. See attached test project where this works as expected.

3

Hi Bruno,

Thanks for the reply.

I’ve run your project and I get the same behaviour.

I’ve updated all my FNC libraries to the latest versions and it still persists.

Recording 2026-05-13 084903

As you can see in the above, I am unable to get the checkboxes to be checked.

What’s more, I know that my project code used to work correctly because I have a compiled version running as expected.

Edit: I’ve tried this on multiple browsers and it still persists.

Thanks!

6

We cannot reproduce this here on multiple machines.
What did you change between the time your project worked and now?

7

I believe that I did a complete uninstall/reinstall of TMS after a Smart Setup update didn’t work as expected.

I can’t think of anything else, I’m afraid.

Here is the project that I have previously compiled and currently have working:

Recording 2026-05-13 113632

The previously compiled one works as expected, but when I run the code now, the checkboxes don’t check and if I click off the checkbox some strange exception occurs.

8

Just for the sake of completeness, below is the code for the above.

procedure TForm2.TMSFNCDataGrid1BeforeDrawCell(Sender: TObject;
AGraphics: TTMSFNCGraphics; ACell: TTMSFNCDataGridCell;
var ACanDraw: Boolean);
begin
   if ACell.Column=TMSFNCDataGrid1.ColumnCount-1 then
     ACell.DrawElements:=ACell.DrawElements-[gcdText];
end;

procedure TForm2.TMSFNCDataGrid1CellCheckBoxChange(Sender: TObject; AColumn,
ARow: Integer);
var
  b:Boolean;
begin
  b:=TMSFNCDataGrid1.Booleans[AColumn, ARow];
  TMSFNCDataGrid1.SelectedRows[ARow]:=b;
end;

procedure TForm2.WebFormShow(Sender: TObject);
var
  col:TTMSFNCDataGridColumn;
  i:integer;
begin
  col:=TMSFNCDataGrid1.Columns.Add;
  col.ReadOnly:=True;
  col.Editor:=getNone;
  col.Name:='';
  col.DisplayName:='Select';
  col.Header:='Select';
  TMSFNCDataGrid1.AddDataCheckBoxColumn(TMSFNCDataGrid1.Columns.Count-1);
  TMSFNCDataGrid1.AddCheckBox(col.Index, 0);
  for i:=0 to TMSFNCDataGrid1.RowCount-1 do
    begin
      TMSFNCDataGrid1.Cells[col.index, i]:=False;
      TMSFNCDataGrid1.ControlAligns[col.index, i]:=gcaClient;
    end;
end;
9

Why is there this line

col.ReadOnly:=True;

meaning you set the column to readonly, i.e. editors on this column should not work?

10

I believe I put it there to stop the underlying boolean text from being selected (I seem to recall having problems with that).

Removing this line doesn’t stop the problem, sadly.

11

Please send a project with which we should be able to reproduce this problem.

12

Project is attached .

Project1.zip (5.0 MB)

I have added 3 columns with checkboxes.

The first is using OnGetCellClass to generate it.

The second is using AddCheckBoxColumn.

The third is using AddDataCheckBoxColumn.

The method I used previously in my project was option 3. Now I can’t select the checkbox and if I click in the whitespace in the cell, I get an exception.

None of these columns allows me to select the checkbox.

Hope this helps!

13

I cannot see the issue that checkboxes cannot be checked here
FNCDataGridCheck
I recommend you make sure to use TMS WEB Core v3.0 (available on the "My Products" page) and the latest version of TMS FNC Core / TMS FNC UI Pack.

20

I’ve updated to TMS Web Core v3.0 and that allows the checkboxes to be displayed again :partying_face:

Unfortunately, I do have an issue still.

Recording 2026-05-15 142245

As you can see in the above, if I click in the white space of the column, sometimes the boolean text bleeds through, and then even sometimes I get a strange exception.

In the above, this took some effort to reproduce (I was clicking very rapidly) but in my project, this happens pretty much without fail when pressing the whitespace.

I’ve attached the above as a zip.

Project1.zip (5.1 MB)

21

I’ve just updated my FNC Core and UI pack to the latest versions.

If I now run the project I attached here FNCDataGrid checkboxes not able to be clicked - #12 by Wruss , double clicking the whitespace in the cell with the data checkbox (column 3) causes an exception every time without fail.

Clicking the checkbox seems to work fine, and single clicking the cell seems not to trigger anything, just double clicking.

24

Hi,

Unfortunately it’s taking longer that anticipated due to the complex nature of this issue. Rest assured, we are working on it and will report back as soon as possible.

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