Solved

Updating labels quickly without a flicker

Posted on 2002-07-03
7
889 Views
Last Modified: 2010-04-04
I'm collecting data from a data Aquisition device.  Right now I'm only gathering the data about once per second.  I'm using pre-positioned labels on the form to display the information by the following method.

Inside a Timer loop with intervals at 1000
Query the Device
Assign the value to each label (about 30 labels)
application.processmessages

My labels flicker real bad and sometimes just blank out
with a white background like I'm not getting them displayed properly.

Is there a better way to handle this, or even a better way to display the data prepositioned on the form?

I can update a memo with the information to verify all the data is correct, and also to make sure the query isn't taking to long, so I believe it's the technique I'm attemping to use.
0
Comment
Question by:rwskinner
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 27

Expert Comment

by:kretzschmar
ID: 7126582
-place a panel as background-container
-set doublebuffered to true
0
 
LVL 3

Accepted Solution

by:
marcoszorrilla earned 50 total points
ID: 7126601
Try puttint DoubleBuffered:=True;
You can do a test with this very simple sample.

procedure TForm1.Button1Click(Sender: TObject);
var
i:Integer;
begin

DoubleBuffered:=True;
for i:=1 to 10000 do
begin
Application.ProcessMessages;
label1.Caption:=IntToStr(i);
end;


Best Regards.
Marcos.
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 7126629
btw. marcoszorrilla

take your points at q
http://www.experts-exchange.com/delphi/Q_20318113.html

meikl ;-)
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 3

Expert Comment

by:marcoszorrilla
ID: 7126632
Sorry Kretzschmar when I start to prepare my example ther is any answer.

Best Regards.
Marcos.
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 7126642
doesn't matter, marcos,

but take your points from qow 18 at
http://www.experts-exchange.com/delphi/Q_20318113.html
0
 

Expert Comment

by:Zoly
ID: 7127580
Also, using TStaticText instead of TLabel is always an idea worth considering. TStaticText is a TWinControl while TLabel is a TControl and so you get much smoother effects (less/no flicker) with TStaticText.

Z
0
 

Author Comment

by:rwskinner
ID: 7130831
Thanks for the help.  That cured the problem.  I added the refresh command as well and it helped.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Delphi Yen format 3 74
DBGrid or StringGrid ? 6 136
Tidtcpserver listening on multiports? 1 55
Delphi: barcode reading on android platform 1 101
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.

738 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