?
Solved

Delphi ListBox.setfocus problem...

Posted on 2003-11-19
7
Medium Priority
?
966 Views
Last Modified: 2010-04-05
can anyone give me a source of a working listbox.setfocus command in delphi, because i always get array error.
thanks in advance :)
0
Comment
Question by:bbh2k3
[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
  • 2
  • 2
  • 2
  • +1
7 Comments
 
LVL 27

Expert Comment

by:kretzschmar
ID: 9785057
??

where is the problem?
maybe you should show what you do

procedure TForm1.Button1Click(Sender: TObject);
begin
  if listbox1.CanFocus then
    listbox1.SetFocus;
end;

meikl ;-)
0
 
LVL 26

Expert Comment

by:EddieShipman
ID: 9787450
You are getting an array error? It is NOT coming from the listbox because Listbox deosn't use arrays.
If you post the code you are using and the COMPLETE error message, we can help you.
0
 
LVL 2

Expert Comment

by:Robn
ID: 9788997
I have never seen this problem before but I have had issues where SetFocus causes errors (especially on 3rd party components in ActiveX forms) and I solved this by using SetFocus in the Windows unit.

Example
SetFocus(ListBox1.Handle);

However, like EddieShipman said, this seems to be something other than a SetFocus error. The ListBox will use arrays in the OS to manage the items but I have never seen this error in Delphi before.
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!

 

Author Comment

by:bbh2k3
ID: 9799885
i wanted to do it like, when i add a line in the listbox, to automatically scoll down the bar to see the line added.
sorry about my poor english .. ;)
0
 
LVL 2

Accepted Solution

by:
Robn earned 200 total points
ID: 9799915
Index := ListBox1.Items.Add(...);
ListBox1.ItemIndex := Index;
0
 
LVL 26

Expert Comment

by:EddieShipman
ID: 9800078
[quote]when i add a line in the listbox, to automatically scoll down the bar to see the line added[/quote]

What would that have to do with setting focus to the listbox, anyway?

Robn gave you the correct answer to do that but it can be shortened to:

ListBox1.ItemIndex := ListBox1.Items.Add(...);



0
 

Author Comment

by:bbh2k3
ID: 9801709
thanks for the help guys, i really apriciate, keep it going!
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
Suggested Courses
Course of the Month12 days, 12 hours left to enroll

777 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