Solved

DBGrid and key press

Posted on 2002-04-03
4
1,084 Views
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 ?
0
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 50 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. :>)
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

823 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question