unit1.pas

DELPHI经典程序

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ExtCtrls;
type
  TForm1 = class(TForm)
    ScrollBar4: TScrollBar;
    Label4: TLabel;
    ScrollBar1: TScrollBar;
    ScrollBar2: TScrollBar;
    ScrollBar3: TScrollBar;
    Panel1: TPanel;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Image1: TImage;
    procedure FormResize(Sender: TObject);
    procedure ScrollBar4Change(Sender: TObject);
    procedure ScrollBar1Change(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
{$R *.DFM}

procedure TForm1.ScrollBar1Change(Sender: TObject);
begin
  Panel1.Color:=RGB(ScrollBar1.Position,
                     ScrollBar2.Position,ScrollBar3.Position);
  Label1.Caption:='R = '+IntToStr(ScrollBar1.Position);
  Label2.Caption:='G = '+IntToStr(ScrollBar2.Position);
  Label3.Caption:='B = '+IntToStr(ScrollBar3.Position);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Panel1.Color:=RGB(ScrollBar1.Position,ScrollBar2.Position,ScrollBar3.Position);
  Label1.Caption:='R = '+IntToStr(ScrollBar1.Position);
  Label2.Caption:='G = '+IntToStr(ScrollBar2.Position);
  Label3.Caption:='B = '+IntToStr(ScrollBar3.Position);
end;

procedure TForm1.FormResize(Sender: TObject);
begin
   ScrollBar4.Left := 10;
   ScrollBar4.Width := Form1.ClientWidth-20;
   Label4.Left := 10;
   Label4.Width := Form1.ClientWidth-20;
   ScrollBar4.Max:=Form1.ClientWidth-35;
   ScrollBar4.Position := ScrollBar4.Max div 2;
end;

procedure TForm1.ScrollBar4Change(Sender: TObject);
begin
  Label4.Caption := IntToStr( ScrollBar4.Position );
  Image1.Left:=ScrollBar4.Position;
end;

end.