• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 906
  • Last Modified:

Sender: TObject

How can I use the Sender object in my app ?

example:

procedure TfrmClients.cbNoClientsClick(Sender: TObject);
begin
with Sender do
  begin
  //doStuffWithSender
  end;
end;


I want to use the methods and properties of Sender but I can't manage to tell my app what Sender is actually.  Is there any way to tell my app that the Sender is a button or a combobox or something ?

Thanks!!
0
qas
Asked:
qas
1 Solution
 
simonetCommented:

Without having to resort to RTTI (which is a pain in the butt), you kinda have to do some guesswork:

procedure TfrmClients.cbNoClientsClick(Sender: TObject);
begin
  if Sender is TButton then
    with TButton(Sender) do
    begin
       // code goes here
    end;

  if Sender is TComboBox then
    with TComboBox(Sender) do
    begin
       // code goes here
    end;

  // ... and so on...
end;

Yours,

Alex
0
 
CrazyOneCommented:
Yeah I agree with Alex. You would need to specifically Identify the actual object being passed in your parameter. :>(
0
 
qasAuthor Commented:
Perfect!
Exacly what I needed.
I actually knew what the component was.  I just didn't kow how to tell the app.

Thanks!
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
rchambelCommented:
You may try this one:

 if Sender.ClassName='TButton' then ...
 if Sender.ClassName='TEdit' then ...


Of course you're gonna have a lot of work. it only depends on wich objects directly call that method.

Hope you like this approach :-)

Best regards
0
 
rchambelCommented:
You may try this one:

 if Sender.ClassName='TButton' then ...
 if Sender.ClassName='TEdit' then ...


Of course you're gonna have a lot of work. it only depends on wich objects directly call that method.

Hope you like this approach :-)

Best regards
0
 
rchambelCommented:
Sorry for the "double" comment... this thing got stucked!

I knew simonet's solution, but didn't remember it... give him the points! :-)
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!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now