Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

adding onchange event at runtime

Posted on 2002-06-19
7
Medium Priority
?
557 Views
Last Modified: 2010-04-04
i'm creating several trichedits at run time, is there a way to create an onchange event that takes as parameter the current (the one with the focus) trichedit?

basically, i want to handle that if user writes then the caption of the form changes.

also, i noticed that by creating the richedit at run time the default popupmenu, the one with copy, paste.... is not created, any way to do this?

thanks
0
Comment
Question by:urif
  • 3
  • 2
  • 2
7 Comments
 
LVL 27

Expert Comment

by:kretzschmar
ID: 7094905
didn't know yet,
if a richedit has an onchange-event,
but you can use the onkeypress-event

the sender holds the current so you could do
something like this

if (sender is trichedit) then
begin
  caption := TRichedit(sender).name; //for example
  ...
end;

to assign a event procedure

r := trichedit.create(self)
r.onkeypress := MyPreDefinedKeyPressMethod;

just from head

meikl ;-)

0
 
LVL 17

Accepted Solution

by:
geobul earned 400 total points
ID: 7094963
Hi,
1.Just to expand Meikl's code:
---
type
  TForm1 = class(TForm)
    procedure REChange(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  re1: TRichEdit;

implementation

{$R *.DFM}

procedure TForm1.REChange(Sender: TObject);
begin
  // your code
  if (Sender is TRichEdit) then
    ShowMessage((Sender as TRichEdit).Name + ' was changed');
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  re1 := TRichEdit.Create(Form1);
  with re1 do begin
    Parent := Form1;
    Name := 're1';
    Left := 100;
    Top := 100;
    OnChange := REChange;
  end;
end;
---
2. I'm afraid I have no default popup menu in both design and run-time created richedits.

Regards, Geo
0
 

Author Comment

by:urif
ID: 7095173
they were both good asnwer, and i didn't know whom to give the points so i flipped the coin. thanks for your help!
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
LVL 27

Expert Comment

by:kretzschmar
ID: 7095212
lucky geo ;-)
0
 
LVL 17

Expert Comment

by:geobul
ID: 7095495
What could I say? I definately didn't count on getting any points. And I didn't know that I had such luck :-)
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 7095513
just about
>so i flipped the coin

;-)
0
 

Author Comment

by:urif
ID: 7095541
ok, ok

i'll post a fake question and i give you the points too.

look for "fake question" as a title
0

Featured Post

New feature and membership benefit!

New feature! Upgrade and increase expert visibility of your issues with Priority Questions.

Question has a verified solution.

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

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
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 course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…
Screencast - Getting to Know the Pipeline
Suggested Courses
Course of the Month11 days, 19 hours left to enroll

916 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