components

Create an OnProgressChange Event of the control, which can then arrange some progress bar on the form.

The event should grow from 0 till 100 (what means percentage), and then on the conntrols On that event trigger you can write the code for changing the progres bar.

You should create the progress bar like this:

  TheProgressBar := TProgressBar.Create(TheForm); // This will set the owner property
  TheProgressBar.Parent := TheForm;

Cheers,

Raymond.

Hi:

 Try something like this

 TProgressEvent = procedure (Sender: TObject; Progress: integer) of object;

 TExample = class(TComponent)
   private
    FOnProgress: TProgressEvent;
   ..........
    procedure SomeThing;
   ..........
  published
   property OnProgress: TProgressEvent read FOnprogress write FOnProgress
 end;

 procedure TExample.Something
 begin
  .......
  // value is progress value
  if Assigned(FonProgress) then FOnProgress(self, value)
 end;


And in your program

 procedure DoProgress(Sender: TObject; Progress: integer);

var
 c: TExample;
 Pb: TProgressBar;
.......
 c.OnProgress:= DoProgress
.......

 procedure TMainForm.DoProgress(Sender: TObject; Progress: integer);
 begin
  ....
  Pb.Position:= Progress;
  ...
 end;

 Or like this

 TExample = class(TComponent)
   private
    FOnProgress: TProgressEvent;
    FProgressBar: TProgressBar;
   ..........
    procedure SomeThing;
   ..........
  published
   property OnProgress: TProgressEvent read FOnprogress write FOnProgress
   property ProgressBar: TProgressBar read FProgressBar write FProgressBar;
 end;

 procedure TExample.Something
 begin
  .......
  // value is progress value
  if Assigned(FProgressBar) then FprogressBar.Position:= value;
  if Assigned(FonProgress) then FOnProgress(self, value)
 end;


Regards,
Miche.

My component uesed by another developer,
I cannot write any code on his(her) program like:

 procedure TMainForm.DoProgress(Sender: TObject; Progress: integer);
 begin
  ...
end;

And I also cannot enforce him(her) write an event.

I means all of jobs like processBar create, display on a right position and free done by component itself.

But a non-visual component can own a processBar but cannot show it.
So I should arrange another owner.

thanks ten!