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Array of Components?

Posted on 2000-04-21
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Last Modified: 2010-04-04
I have a project with a long list of radio buttons.  I dont want to use a dropdown list.  

Is it possible to create an array of radiobuttons (or any other components)? ex.  Radiobutton[x] instead of Radiobutton1, 2 etc.

The end goal is to be able to process their states in a loop rather than each one individually.
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Question by:d32coder
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Accepted Solution

by:
PascalCP earned 200 total points
ID: 2738293
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  LST : TList;               // Contains all the radiobuttons
  I   : integer;             // Counter to autonumber the radiobutton
implementation

{$R *.DFM}

// When button 1 is clicked , there is a radiobutton added to the list
procedure TForm1.Button1Click(Sender: TObject);
var
 rb : TRadiobutton;
begin
  rb := TRadioButton.Create(Self);
  rb.Caption := 'RadioButton ' + inttostr(i);
  Lst.Add(rb);
  i := i + 1;
end;

// when creating the form , we create a list to store our radiobuttons
procedure TForm1.FormCreate(Sender: TObject);
begin
LST := TList.Create;
i := 1;
end;

// when closing the application we free the list of radiobuttons
procedure TForm1.FormDestroy(Sender: TObject);
begin
  LST.Destroy;
end;

// when button 2 is clicked , you see al the radiobuttons in the list
procedure TForm1.Button2Click(Sender: TObject);
var
  idx : integer;
begin
  For idx := 1 to LST.Count do begin
    showmessage(TRadioButton(LST.Items[pred(idx)]).caption);
  end;
end;

end.
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