Problem with DataSource.DataChange / Repaint on a wwDBGrid

Hello,

for a current project we use the wwDBGrid to calculate certain numbers. We use the DataSource.DataChange to issue the command to calculate (see below in the code).
The problem is that the wwDBGrid does not display the result until we leave the row or jump into the result row. The goal would be that the result is drawn immediately in the result row or when leaving the cell.

procedure TForm1.dsMEAADataChange(Sender: TObject; Field: TField);
begin
if field = nil then exit;

if ( field = mtbMEAAa ) or ( field = mtbMEAAb ) or ( field = mtbMEAAc ) or
( field = mtbMEAAd ) or ( field = mtbMEAAf ) or ( field = mtbMEAAMenge )
then CalcMenge(mtbMEAA);

end;

Thanks in advance!

Roy Woll

July 07, 2020 20:35

I don't know if this is an option for you, but you could call the grid's InvalidateCurrentRow method after the change. I can't tell what your calcmenge function does so its hard for me to know what is going on in your code.

-Roy

Stefan Fraissler

July 08, 2020 06:31

Hello Roy,

thanks for your comment. We allready use InvalidateCurrentRow. We thought there would be an easier way.

July 12, 2020 04:36

I would need to know what is in your code before I could comment with more insight since I don't know what your code in CalcMenge is doing. You would need to provide this info.

Problem with DataSource.DataChange / Repaint on a wwDBGrid

Comments

Didn't find what you were looking for?