u_form1.pas

来自「很好地delphi书籍源码」· PAS 代码 · 共 50 行

unit U_Form1;

interface

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

type
  TForm1 = class(TForm)
    DCurve1: TDCurve;
    Timer1: TTimer;
    StartButton: TButton;
    StopButton: TButton;
    procedure Timer1Timer(Sender: TObject);
    procedure StopButtonClick(Sender: TObject);
    procedure StartButtonClick(Sender: TObject);
  private
    t:integer;
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Timer1Timer(Sender: TObject);
begin
  Inc(t);
  DCurve1.WriteTitle(format('时间: %d ',[t]),'');
  DCurve1.DrawLine3(t,50*Sin(0.01*t),50*cos(0.01*t),50*Sin(0.02*t+1.28));
end;

procedure TForm1.StopButtonClick(Sender: TObject);
begin
  Timer1.Enabled:=false;
end;

procedure TForm1.StartButtonClick(Sender: TObject);
begin
  Timer1.Enabled:=true;
end;

end.