unit DHelp;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls, Vcl.Imaging.pngimage,
  PngImageList, System.ImageList, Vcl.ImgList, System.Actions, Vcl.ActnList;

type
  TDlgHelp = class(TForm)
    imgMain: TImage;
    imgPrev: TImage;
    imgNext: TImage;
    imgHelpList: TPngImageCollection;
    imgBtnList: TPngImageList;
    ActionList: TActionList;
    acPrev: TAction;
    acNext: TAction;
    acExit: TAction;
    acSpacePress: TAction;
    imgClose: TImage;
    imgBtnList2: TPngImageList;
    procedure imgMainMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgPrevMouseEnter(Sender: TObject);
    procedure imgPrevMouseLeave(Sender: TObject);
    procedure imgPrevMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgPrevMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure acExitExecute(Sender: TObject);
    procedure acPrevExecute(Sender: TObject);
    procedure acNextExecute(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure imgCloseMouseEnter(Sender: TObject);
    procedure imgCloseMouseLeave(Sender: TObject);
    procedure imgCloseMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure imgCloseMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
    nCurIdx_: Integer;
    nSt_, nEd_: Integer;
    bIsKor_: Boolean;
    procedure SetHelpImg(nImgIdx: Integer);
    procedure SetImgBtn(aImgList: TPngImageList; imgBtn: TImage; nImgIdx: Integer);
  public
    { Public declarations }
    Constructor Create(aOwner: TComponent); override;
  end;

var
  DlgHelp: TDlgHelp;

implementation

uses
  KDL.Localizer;

{$R *.dfm}

Constructor TDlgHelp.Create(aOwner: TComponent);
begin
  Inherited Create(aOwner);

  if Pos('412', FreeLocalizer.LanguageFile) > 0 then
  begin
  // 한글
//    imgPrev.Left := 327;
//    imgNext.Left := 924;
    nCurIdx_ := 0;
    nSt_ := 0;
    nEd_ := 7;
  end else
  if Pos('804', FreeLocalizer.LanguageFile) > 0 then
  begin
  // 간체
    nCurIdx_ := 16;
    nSt_ := 16;
    nEd_ := 23;
  end else
  if Pos('404', FreeLocalizer.LanguageFile) > 0 then
  begin
  // 번체
    nCurIdx_ := 24;
    nSt_ := 24;
    nEd_ := 31;
  end else begin
//    imgPrev.Left := 223;
//    imgNext.Left := 1033;
    nCurIdx_ := 8;
    nSt_ := 8;
    nEd_ := 15;
  end;

  SetHelpImg(nCurIdx_);
  SetImgBtn(imgBtnList, imgPrev, imgPrev.Tag);
  SetImgBtn(imgBtnList, imgNext, imgNext.Tag);
  SetImgBtn(imgBtnList2, imgClose, 0);
end;

procedure TDlgHelp.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  Action := caFree;
end;

procedure TDlgHelp.acExitExecute(Sender: TObject);
begin
  Close;
end;

procedure TDlgHelp.acNextExecute(Sender: TObject);
begin
  SetHelpImg(nCurIdx_ + 1);
end;

procedure TDlgHelp.acPrevExecute(Sender: TObject);
begin
  SetHelpImg(nCurIdx_ - 1);
end;

procedure TDlgHelp.SetHelpImg(nImgIdx: Integer);
begin
  if (nImgIdx >= nSt_) and (nImgIdx <= nEd_) then
  begin
    imgMain.Picture.Assign(imgHelpList.Items[nImgIdx].PngImage);
    nCurIdx_ := nImgIdx;

    imgPrev.Visible := nCurIdx_ <> nSt_;
    imgNext.Visible := nCurIdx_ <> nEd_;
  end;
end;

procedure TDlgHelp.SetImgBtn(aImgList: TPngImageList; imgBtn: TImage; nImgIdx: Integer);
begin
  aImgList.GetIcon(nImgIdx, imgBtn.Picture.Icon);
  imgBtn.Repaint
end;

procedure TDlgHelp.imgCloseMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  SetImgBtn(imgBtnList2, imgClose, 2);
end;

procedure TDlgHelp.imgCloseMouseEnter(Sender: TObject);
begin
  SetImgBtn(imgBtnList2, imgClose, 1);
end;

procedure TDlgHelp.imgCloseMouseLeave(Sender: TObject);
begin
  SetImgBtn(imgBtnList2, imgClose, 0);
end;

procedure TDlgHelp.imgCloseMouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  imgCloseMouseEnter(Sender);
end;

procedure TDlgHelp.imgMainMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  ReleaseCapture;
  SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
end;

procedure TDlgHelp.imgPrevMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  if Sender is TImage then
    SetImgBtn(imgBtnList, TImage(Sender), TImage(Sender).Tag + 2);
end;

procedure TDlgHelp.imgPrevMouseEnter(Sender: TObject);
begin
  if Sender is TImage then
    SetImgBtn(imgBtnList, TImage(Sender), TImage(Sender).Tag + 1);
end;

procedure TDlgHelp.imgPrevMouseLeave(Sender: TObject);
begin
  if Sender is TImage then
    SetImgBtn(imgBtnList, TImage(Sender), TImage(Sender).Tag);
end;

procedure TDlgHelp.imgPrevMouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  imgPrevMouseEnter(Sender);
end;

end.