asked on

In Delphi VCL, how can you exit without completing all actions?

I have exit procedures on lots of visual controls, but when the user hits buttons with the function cancel or exit I want to stop processing on all these exit processes.

Since the program does not get to the Cancel or Exit buttons until it has it completed the exit processes, it takes two clicks to exit the form.

Is the unavoidable, or is there a way this natural processing can be circumvented?

Here is a piece of code I have written to demonstrate the problem:

procedure TForm1.Button1Exit(Sender: TObject);
begin
  MessageDlg('I am here', mtInformation, [mbOK], 0);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  close;
end;

procedure TForm1.FormActivate(Sender: TObject);
begin
  ActiveControl := Button1;
end;

Open in new window

In this program, it starts with the focus on Button1, so when I click Button2, I still get the message from Button1. This is the type of action I want to avoid.

ASKER CERTIFIED SOLUTION

MerijnB

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GrahamDLovell

ASKER

Too logical!

I suppose I should have thought of it. I will have to put it on every field exit routine, but it will improve the functionality quite a bit.

Thanks.

MerijnB

It's not a 'golden' method I guess, still thinking of something better.
What kind of functionality do you have in the OnExit() of buttons?

GrahamDLovell

ASKER

Depending on the value entered into the field, other fields are made visible or invisible, descriptions are changed, etc.

Your method will be workable, and not too hard to implement.