Cannot focus disabled window.

[delphiman]

I am using Delphi 6 Enterprise.

Can someone please tell me the cause of the following exception.

"Cannot focus on disabled window."

I have 4 TGrids (one above the other) on a TForm each of which is hooked to a different IBDataSet on a TDataModule.

I am able to scroll up and down in each grid. But I find if I switch from scrolling in one window - to scrolling in another - I suddenly and unpredicatably get the above exception.

Thanks in advance.

Terry

 

[Svanhooft]

hi,

You are probaly trying to setfocus on an form or a component what is not visible. Some thing like this:

procedure DBgrid.onclick
begin
From2.setfocus;
or
Form2.edit1.setfocus;
end;

And Form2 isn't visible.

Steph

 

[delphiman]

Thanks for that - but actually that can't be the problem.

Because all I have of note (in each grid) is OnDblClick - which isn't being triggered by scrolling.

For what it's worth the event-handler in each case merely amounts to the following (similar for each grid) which purely produces another TForm with a bigger (similar)
TGrid on it - hooked to the same TDataSource.

(Indeed these are the only Procedures on the entire TForm. )

procedure TfrmFather.DBGrid1DblClick(Sender: TObject);
begin
frmChildren.ShowModal;
end;