{******************************************************************************}
{ @UnitName    : hxCalendar                                                    }
{ @Project     : dclusr                                                        }
{ @Copyright   : k                                                             }
{ @Author      : D2000                                                         }
{ @CreateDate  : 2004-04-05 19:23:10                                           }
{ @LastUpdate  : 2004-04-23 18:58:59 by D2000                                  }
{ @Description :                                                               }
{ @Comment     :                                                               }
{ @History     :                                                               }
{******************************************************************************}
unit hxCalendar;

interface

uses Classes, Controls, Messages, Windows, Forms, Graphics, StdCtrls,
  Grids, SysUtils,DateUtils;

type
  TDayOfWeek = 0..6;
  TDroppedCell = procedure(Sender: TObject; ACol, ARow: LongInt;
    var Value: string) of object;
  TCellDragOver = procedure(Sender, Source: TObject; X, Y: Integer;
    State: TDragState; var Accept: Boolean) of object;
  TCalendarStrings = array[0..6, 0..6] of TStringList;
    THzDate = record  //農歷日期
    Year: integer;
    Month: integer;
    Day: integer;
    isLeap: Boolean;  //閏月
  end;

  TGzDate = record //干支日期
    Year: integer;
    Month: integer;
    Day: integer;
  end;

  ThxCalendar = class(TCustomGrid)
  private
    FDate: TDate;
    FViewDate: TDate;
    //FCalColors: TLssCalColors;
    FYear: word;
    FMonth: word;
    FDay: word;
    FCalStrings: TCalendarStrings;
    FOnDroppedCell: TDroppedCell;
    FOnCellDragOver: TCellDragOver;
    FMonthOffset: Integer;
    FOnChange: TNotifyEvent;
    FReadOnly: Boolean;
    FStartOfWeek: TDayOfWeek;
    FUpdating: Boolean;
    FUseCurrentDate: Boolean;
    function GetCellText(ACol, ARow: Integer): string;
    function GetDateElement(Index: Integer): Integer;
    procedure SetCalendarDate(Value: TDate);
    procedure SetDateElement(Index: Integer; Value: Integer);
    procedure SetStartOfWeek(Value: TDayOfWeek);
    procedure SetUseCurrentDate(Value: Boolean);
    function StoreCalendarDate: Boolean;
    procedure SetCellString(ACol, ARow, ADay: Integer; Value: string); virtual;
  protected
    { Protected declarations }

    procedure AcceptDropped(Sender, Source: TObject; X, Y: integer);
    procedure CellDragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure Change; dynamic;
    procedure ChangeMonth(Delta: Integer);
    procedure Click; override;
    function DaysPerMonth(AYear, AMonth: Integer): Integer; virtual;
    function DaysThisMonth: Integer; virtual;
    procedure DrawCell(ACol, ARow: Longint; ARect: TRect; AState: TGridDrawState); override;
    function IsLeapYear(AYear: Integer): Boolean; virtual;
    function SelectCell(ACol, ARow: Longint): Boolean; override;
    procedure WMSize(var Message: TWMSize); message WM_SIZE;
  public
    constructor Create(AOwner: TComponent); override;

        //返回農歷 y年的總天數
    function DaysOfLunarYear(y: integer): integer;
    //返回農歷 y年閏月的天數
    function daysofleapMonth(y: integer): integer;
    //返回農歷 y年閏哪個月 1-12 , 沒閏返回 0
    function leapMonth(y: integer): integer;
    //返回農歷 y年m月的總天數
    function Daysofmonth(y, m: integer): integer;
    //算出農歷, 傳入公歷日期, 返回農歷日期
    function ToLunar(TheDate: TDate): THzDate;
    //傳入 offset 返回干支, 0=甲子
    function cyclical(num: integer): string;
    //算出公歷, 傳入農歷日期控件, 返回公歷
    function ToGreg(objDate: THzDate): TDate;
    //檢查農歷日期是否合法
    function ChkHzDate(objDate: THzDate): Boolean;
    //某年的第n個節氣為幾日(從0小寒起算)
    function sTerm(y, n: integer): TDateTime;
    //求年柱，月柱，日柱(年，月為農歷數字，TheDate為當天的公歷日期)
    function GetGZ(y, m: integer; TheDate: TDate): TGzDate;
    //取漢字日期
    function FormatLunarDay(day:integer): string;
    //漢字月份
    function FormatLunarMonth(month:integer;isLeap:boolean): string;
    //漢字年份
    function FormatLunarYear(year:integer): string;
    // 取得指定日期的節氣
    function GetJQ(TheDate: TDate): string;
      // 取得新歷節日
    function GetsFtv(TheDate: TDate): string;
      // 取得農歷節日
    function GetlFtv(TheDate: ThzDate): string;


    property CalendarDate: TDate  read FDate write SetCalendarDate stored StoreCalendarDate;

    procedure MouseToCell(X, Y: Integer; var ACol, ARow: Longint);


    property CellText[ACol, ARow: Integer]: string read GetCellText;
    procedure NextMonth;
    procedure NextYear;
    procedure PrevMonth;
    procedure PrevYear;
    procedure UpdateCalendar; virtual;
  published
    property Align;
    property Anchors;
    property BorderStyle;
    property Color;
    property Constraints;
    property Ctl3D;
    property Day: Integer index 3  read GetDateElement write SetDateElement stored False;
    property DragCursor;
    property DragKind;
    property DragMode;
    property Enabled;
    property Font;
    property GridLineWidth;
    property Month: Integer index 2  read GetDateElement write SetDateElement stored False;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly: Boolean read FReadOnly write FReadOnly default False;
    property ShowHint;
    property StartOfWeek: TDayOfWeek read FStartOfWeek write SetStartOfWeek;
    property TabOrder;
    property TabStop;
    property UseCurrentDate: Boolean read FUseCurrentDate write SetUseCurrentDate default True;
    property Visible;
    property Year: Integer index 1  read GetDateElement write SetDateElement stored False;
    property OnClick;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDock;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnStartDock;
    property OnStartDrag;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
  end;
const
  lunarInfo: array[0..200] of WORD =(
    $4bd8,$4ae0,$a570,$54d5,$d260,$d950,$5554,$56af,$9ad0,$55d2,
    $4ae0,$a5b6,$a4d0,$d250,$d295,$b54f,$d6a0,$ada2,$95b0,$4977,
    $497f,$a4b0,$b4b5,$6a50,$6d40,$ab54,$2b6f,$9570,$52f2,$4970,
    $6566,$d4a0,$ea50,$6a95,$5adf,$2b60,$86e3,$92ef,$c8d7,$c95f,
    $d4a0,$d8a6,$b55f,$56a0,$a5b4,$25df,$92d0,$d2b2,$a950,$b557,
    $6ca0,$b550,$5355,$4daf,$a5b0,$4573,$52bf,$a9a8,$e950,$6aa0,
    $aea6,$ab50,$4b60,$aae4,$a570,$5260,$f263,$d950,$5b57,$56a0,
    $96d0,$4dd5,$4ad0,$a4d0,$d4d4,$d250,$d558,$b540,$b6a0,$95a6,
    $95bf,$49b0,$a974,$a4b0,$b27a,$6a50,$6d40,$af46,$ab60,$9570,
    $4af5,$4970,$64b0,$74a3,$ea50,$6b58,$5ac0,$ab60,$96d5,$92e0, //1999
    $c960,$d954,$d4a0,$da50,$7552,$56a0,$abb7,$25d0,$92d0,$cab5,
    $a950,$b4a0,$baa4,$ad50,$55d9,$4ba0,$a5b0,$5176,$52bf,$a930,
    $7954,$6aa0,$ad50,$5b52,$4b60,$a6e6,$a4e0,$d260,$ea65,$d530,
    $5aa0,$76a3,$96d0,$4afb,$4ad0,$a4d0,$d0b6,$d25f,$d520,$dd45,
    $b5a0,$56d0,$55b2,$49b0,$a577,$a4b0,$aa50,$b255,$6d2f,$ada0,
    $4b63,$937f,$49f8,$4970,$64b0,$68a6,$ea5f,$6b20,$a6c4,$aaef,
    $92e0,$d2e3,$c960,$d557,$d4a0,$da50,$5d55,$56a0,$a6d0,$55d4,
    $52d0,$a9b8,$a950,$b4a0,$b6a6,$ad50,$55a0,$aba4,$a5b0,$52b0,
    $b273,$6930,$7337,$6aa0,$ad50,$4b55,$4b6f,$a570,$54e4,$d260,
    $e968,$d520,$daa0,$6aa6,$56df,$4ae0,$a9d4,$a4d0,$d150,$f252,
    $d520);

  Gan: array[0..9] of string[2] =
    ('甲','乙','丙','丁','戊','己','庚','辛','壬','癸');

  Zhi: array[0..11] of string[2] =
    ('子','丑','寅','卯','辰','巳','午','未','申','酉','戌','亥');

  Animals: Array[0..11] of string[2] =
    ('鼠','牛','虎','兔','龍','蛇','馬','羊','猴','雞','狗','豬');

  solarTerm: Array[0..23] of string[4] =
    ('小寒','大寒','立春','雨水','驚蟄','春分','清明','谷雨'
    ,'立夏','小滿','芒種','夏至','小暑','大暑','立秋','處暑'
    ,'白露','秋分','寒露','霜降','立冬','小雪','大雪','冬至');

  sTermInfo: Array[0..23] of integer =
    (0,21208,42467,63836,85337,107014,128867,150921
    ,173149,195551,218072,240693,263343,285989,308563,331033
    ,353350,375494,397447,419210,440795,462224,483532,504758);

  nStr1: array[0..10] of string[2] =
    ('日','一','二','三','四','五','六','七','八','九','十');

  nStr2: Array[0..3] of string[2] = ('初','十','廿','卅');
  sFtv : Array[0..22] of string =('0101*元旦','0214 情人節','0308 婦女節'
  ,'0312 植樹節','0315 消費者權益日','0401 愚人節','0501 勞動節','0504 青年節'
  ,'0512 護士節','0601 兒童節','0701 建黨節 香港回歸紀念'
  ,'0801 建軍節','0808 父親節','0909 毛澤東逝世紀念','0910 教師節'
  ,'0928 孔子誕辰','1001*國慶節','1006 老人節','1024 聯合國日','1112 孫中山誕辰紀念'
  ,'1220 澳門回歸紀念','1225 Christmas Day','1226 毛澤東誕辰紀念');
  lFtv:Array[0..9] of string =('0101*春節','0115 元宵節','0505 端午節'
  ,'0707 七夕情人節','0715 中元節','0815 中秋節','0909 重陽節','1208 臘八節','1224 小年','0100*除夕');
procedure Register;

implementation
//uses ds1,u7;
procedure Register;
begin
  RegisterComponents('Samples', [ThxCalendar]);
end;

constructor ThxCalendar.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  { defaults }
  FUseCurrentDate := True;
  FixedCols := 0;
  FixedRows := 1;
  ColCount := 7;
  RowCount := 7;
  ScrollBars := ssNone;
  Options := Options - [goRangeSelect] + [goDrawFocusSelected];
  FDate := Date;
  UpdateCalendar;
end;

procedure ThxCalendar.Change;
begin
  if Assigned(FOnChange) then FOnChange(Self);
end;
procedure ThxCalendar.MouseToCell(X, Y: Integer; var ACol, ARow: Longint);
var
  Coord: TGridCoord;
begin
  Coord := MouseCoord(X, Y);
  ACol := Coord.X;
  ARow := Coord.Y;
end;

{ AcceptDropped override }
procedure ThxCalendar.AcceptDropped(Sender, Source: TObject; X, Y: integer);
var
  ACol, ARow: LongInt;
  Value: string;
begin
  { convert X and Y to Col and Row for convenience }
  MouseToCell(X, Y, ACol, ARow);
  { let user respond to event }
  if Assigned(FOnDroppedCell) then FOnDroppedCell(Source, ACol, ARow, Value);
  { if user returns a string add it to the cells list }
  if Value <> '' then SetCellString(ACol, ARow, 0, Value);
  { set focus to hxCalendar }
  SetFocus;
  { force redraw }
  Invalidate;
end;

{ CellDragOver override }
procedure ThxCalendar.CellDragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
var
  ACol, ARow: LongInt;
begin
  { convert X and Y to Col and Row for convenience }
  MouseToCell(X, Y, ACol, ARow);
  { allow user to set Accept the way they want }
  if Assigned(FOnCellDragOver) then FOnCellDragOver(Sender, Source, ACol, ARow, State, Accept);
  { if Accept = true then apply further logic else leave Accept = false }
  if Accept = true then
    if (not FUpdating) and (not FReadOnly) and (CellText[ACol, ARow] <> '') then
      Accept := true
    else Accept := false;
end;
{ SetCellString - adds a string to the cells stringlist based on Col
  or Row or Day of month. }
procedure ThxCalendar.SetCellString(ACol, ARow, ADay: Integer; Value: string);
var
  i, j: integer;
  TheCellText: string;
begin
  if (not FUpdating) and (not FReadOnly) and (CellText[ACol, ARow] <> '') then
  begin
    { if ADay is being used calc ACol and ARow. Doesn't matter if
      ACol and ARow are <> 0 we just calc them anyway }
    if ADay <> 0 then
    begin
      for i := 0 to 6 do
        for j := 1 to 6 do
        begin
          TheCellText := CellText[i, j];
          if (TheCellText <> '') and (ADay = StrToInt(TheCellText)) then
          begin
            ACol := i;
            ARow := j;
          end;
        end;
    end;
    { if no StringList assigned then create one }
    if FCalStrings[ACol, ARow] = nil then
      FCalStrings[ACol, ARow] := TStringList.Create;
    { add the line of text }
    FCalStrings[ACol, ARow].Add(Value);
  end;
end;


procedure ThxCalendar.Click;
var
  TheCellText: string;
begin
  inherited Click;
  TheCellText := CellText[Col, Row];
  if TheCellText <> '' then Day := StrToInt(TheCellText);
end;

function ThxCalendar.IsLeapYear(AYear: Integer): Boolean;
begin
  Result := (AYear mod 4 = 0) and ((AYear mod 100 <> 0) or (AYear mod 400 = 0));
end;

function ThxCalendar.DaysPerMonth(AYear, AMonth: Integer): Integer;
const
  DaysInMonth: array[1..12] of Integer = (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
begin
  Result := DaysInMonth[AMonth];
  if (AMonth = 2) and IsLeapYear(AYear) then Inc(Result); { leap-year Feb is special }
end;

function ThxCalendar.DaysThisMonth: Integer;
begin
  Result := DaysPerMonth(Year, Month);
end;

{procedure ThxCalendar.DrawCell(ACol, ARow: Longint; ARect: TRect; AState: TGridDrawState);
var
  TheText: string;
begin
  TheText := CellText[ACol, ARow];
  with ARect, Canvas do
    TextRect(ARect, Left + (Right - Left - TextWidth(TheText)) div 2,
      Top + (Bottom - Top - TextHeight(TheText)) div 2, TheText);
end;}
procedure ThxCalendar.DrawCell(ACol, ARow: Longint; ARect: TRect; AState: TGridDrawState);
var
  HzDate:THzDate;
  TheText,ry,dz,hzdaystr,sf: string;
  MyDate:tdate;
  TitleLeft,TitleTop,AddSize:integer;
  FColor:Tcolor;
begin
  AddSize:=2;
  FColor:=Font.Color;
  TheText := CellText[ACol, ARow];
  if (TheText<>'') and (ARow<>0) then
  begin

  MyDate := EncodeDate(year, month, strtoint(TheText));
  HzDate := ToLunar(MyDate);
    dz:= GetJQ(MyDate);
    if dz = '' Then
      if HzDate.Day = 1 then
        ry:=FormatLunarMonth(HzDate.Month,HzDate.isLeap)
      else
        ry := FormatLunarDay(Hzdate.Day);
      if GetsFtv(MyDate)<>'' then sf :=GetsFtv(MyDate);
      if GetlFtv(hzDate)<>'' then sf :=sf+GetlFtv(hzDate);
  end
   else MyDate := 0;

  with ARect, Canvas do
    begin
      if dz<>'' then
      begin
      Font.Color :=FColor;          //新歷字體顏色  舊歷有節 
      Font.Size:=Font.Size+AddSize;
      Font.Style:=Font.Style+[fsBold];
      TextRect(ARect, Left +10,Top +2, TheText+sf);   //舊歷有節時的 新歷顯示  
      Font.Size:=Font.Size-AddSize;
      Font.Style:=Font.Style-[fsBold];
      Font.Color :=clRed;         //舊歷字體顏色  舊歷有節
      TextOut(ARect.Left + Font.Size+10, ARect.Top + (Font.Size+AddSize)*2-3, dz);  //舊歷節日名稱 顯示
      end
      else
      begin
       if sf<>'' then
          begin

            Font.Color :=FColor;
            Font.Size:=Font.Size+AddSize;
            Font.Style:=Font.Style+[fsBold];
            TextRect(ARect, Left+2,Top+2, TheText);  // +sf
            Font.Size:=Font.Size-AddSize;
            Font.Style:=Font.Style-[fsBold];
            Font.Color :=clMaroon ;          //新歷字體顏色  新歷有節氣 
            TextOut(ARect.Left+(Font.Size+AddSize)*2-3,ARect.Top+4, sf);
          end
          else
          begin
            if ARow=0 then 
               begin
                 Font.Style:=Font.Style-[fsBold];
                 Brush.Color :=$00C9C9C9;               //星期 標題欄底色
                 TitleLeft:=(Right-Left-Font.Size*4) div 2;
                 TitleTop:=((Bottom-Top-Font.Size*2) div 2)+AddSize;
                 AddSize:=0;
               end
               else
               begin
                 Font.Style:=Font.Style+[fsBold];
                 TitleLeft:=10;
                 TitleTop:=2;
               end;
            Font.Color :=FColor;         // 新歷字體顏色  新歷沒節 星期幾標題字體色
            Font.Size:=Font.Size+AddSize;
            TextRect(ARect, Left+TitleLeft,Top+TitleTop, TheText+sf); 
            Font.Size:=Font.Size-AddSize;
            Font.Style:=Font.Style-[fsBold];
          end;
       Font.Color :=clPurple;             //舊歷字顏色  舊歷沒節
       TextOut(ARect.Left + Font.Size+10, ARect.Top + (Font.Size+AddSize)*2-3, ry);
      end;
      end;
  end;

function ThxCalendar.GetCellText(ACol, ARow: Integer): string;
var
  DayNum: Integer;
begin
  if ARow = 0 then  { day names at tops of columns }
    Result := ShortDayNames[(StartOfWeek + ACol) mod 7 + 1]
  else
  begin
    DayNum := FMonthOffset + ACol + (ARow - 1) * 7;
    if (DayNum < 1) or (DayNum > DaysThisMonth) then Result := ''
    else Result := IntToStr(DayNum);
  end;
end;

function ThxCalendar.SelectCell(ACol, ARow: Longint): Boolean;
begin
  if ((not FUpdating) and FReadOnly) or (CellText[ACol, ARow] = '') then
    Result := False
  else Result := inherited SelectCell(ACol, ARow);
end;

procedure ThxCalendar.SetCalendarDate(Value: TDate);
begin
  FDate := Value;
  UpdateCalendar;
  Change;
end;