main.pas

来自「《Kylix程序设计》一书中附带的例程源代码」· PAS 代码 · 共 84 行

unit Main;

interface

uses
  Date, SysUtils, Types, Classes, Variants, QGraphics, QControls, QForms, QDialogs,
  QStdCtrls;

type
  TFrmMain = class(TForm)
    LCDYear: TLCDNumber;
    LCDMonth: TLCDNumber;
    LCDDay: TLCDNumber;
    BtnInc: TButton;
    BtnDecrease: TButton;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure BtnIncClick(Sender: TObject);
    procedure BtnDecreaseClick(Sender: TObject);
  private
    { Private declarations }
    FDate: TMyDate;
  public
    { Public declarations }
  end;

var
  FrmMain: TFrmMain;

implementation

{$R *.xfm}

procedure TFrmMain.FormCreate(Sender: TObject);
var
  AYear: Integer;
  AMonth: TMonthType;
  ADay: TDayType;
begin
  AYear := 2000;
  AMonth := 1;
  ADay := 1;
  FDate := TMyDate.Create( AYear, AMonth, ADay );
  LCDYear.Value := IntToStr( AYear );
  LCDMonth.Value := IntToStr( AMonth );
  LCDDay.Value := IntToStr( ADay );
end;

procedure TFrmMain.FormDestroy(Sender: TObject);
begin
  if Assigned( FDate ) then
  begin
    FreeAndNil( FDate );
  end;
end;

procedure TFrmMain.BtnIncClick(Sender: TObject);
var
  AYear: Integer;
  AMonth: TMonthType;
  ADay: TDayType;
begin
  FDate.Inc();
  FDate.GetDate( AYear, AMonth, ADay );
  LCDYear.Value := IntToStr( AYear );
  LCDMonth.Value := IntToStr( AMonth );
  LCDDay.Value := IntToStr( ADay );
end;

procedure TFrmMain.BtnDecreaseClick(Sender: TObject);
var
  AYear: Integer;
  AMonth: TMonthType;
  ADay: TDayType;
begin
  FDate.Dec();
  FDate.GetDate( AYear, AMonth, ADay );
  LCDYear.Value := IntToStr( AYear );
  LCDMonth.Value := IntToStr( AMonth );
  LCDDay.Value := IntToStr( ADay );
end;

end.