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DBGrid and key press

Posted on 2002-04-03
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Last Modified: 2010-04-04
If you press  the down/up arrow key, then the selected row will scroll down/up so long how much you press the key .

I wish to scroll just on time for each key press . If I keep pressed the down button then I wish to go to the next record and then stop untill I will press again the key .

How to do that ?
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Comment
Question by:ginsonic
  • 3
4 Comments
 
LVL 44

Expert Comment

by:CrazyOne
ID: 6917234
Something like this might work.

var
  bKeyUp: Boolean = True;

procedure TForm1.DBGrid1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin

  if (Key = VK_DOWN) then begin
    if bKeyUp then
      bKeyUp := False
    else
      Key := 0;
  end;

end;

procedure TForm1.DBGrid1KeyUp(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin

  bKeyUp := True;

end;


The Crazy One
0
 
LVL 44

Accepted Solution

by:
CrazyOne earned 200 total points
ID: 6917238
Actually I forgot the KeyUp part of the equtation

var
  bKeyUp: Boolean = True;

procedure TForm1.DBGrid1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin

  if Key in [VK_DOWN, VK_UP] then begin
    if bKeyUp then
      bKeyUp := False
    else
      Key := 0;
  end;

end;

procedure TForm1.DBGrid1KeyUp(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin

  bKeyUp := True;

end;
0
 
LVL 9

Author Comment

by:ginsonic
ID: 6917820
Thanks for help.
0
 
LVL 44

Expert Comment

by:CrazyOne
ID: 6917877
Glad to have been able to help. :>)
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