unit umain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, ComCtrls, FileCtrl, StdCtrls, ExtCtrls,
  hyieutils, ieopensavedlg, imageenview, iemio, ieview, iemview, iexBitmaps, hyiedefs, iesettings;

type
  TMainForm = class(TForm)
    Panel1: TPanel;
    DriveComboBox1: TDriveComboBox;
    DirectoryListBox1: TDirectoryListBox;
    FileListBox1: TFileListBox;
    Label1: TLabel;
    edtPage: TEdit;
    updPage: TUpDown;
    lblMax: TLabel;
    Button1: TButton;
    Button5: TButton;
    Button6: TButton;
    ProgressBar1: TProgressBar;
    OpenImageEnDialog1: TOpenImageEnDialog;
    btnAddPage: TButton;
    IEMView1: TImageEnMView;
    chkShowContent: TCheckBox;
    SaveImageEnDialog1: TSaveImageEnDialog;
    btnInsertPage: TButton;
    btnMovePage: TButton;
    edtTIFFImageDescription: TEdit;
    edtTIFFPageName: TEdit;
    cmbTIFFCompression: TComboBox;
    lblCompression: TLabel;
    lblPageName: TLabel;
    lblDescription: TLabel;
    btnUpdate: TButton;
    btnAdjustParams: TButton;
    btnRotate: TButton;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure FileListBox1Change(Sender: TObject);
    procedure updPageClick(Sender: TObject; Button: TUDBtnType);
    procedure Button1Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure btnAddPageClick(Sender: TObject);
    procedure btnAdjustParamsClick(Sender: TObject);
    procedure btnInsertPageClick(Sender: TObject);
    procedure btnMovePageClick(Sender: TObject);
    procedure btnRotateClick(Sender: TObject);
    procedure btnUpdateClick(Sender: TObject);
    procedure chkShowContentClick(Sender: TObject);
    procedure cmbTIFFCompressionChange(Sender: TObject);
    procedure IEMIO1FinishWork(Sender: TObject);
    procedure IEMIO1Progress(Sender: TObject; per: Integer);
    procedure IEMView1Click(Sender: TObject);
  private
    { Private declarations }
    fIEMultiBitmap : TIEMultiBitmap;
    procedure UpdateDisplay(bUpdateImages : Boolean = False);
  public
    { Public declarations }
  end;

var
  MainForm: TMainForm;

implementation

uses
  ushowpage, imageenio;

{$R *.DFM}
{$R WindowsTheme.res}


procedure TMainForm.FormCreate(Sender: TObject);
begin
  fIEMultiBitmap := TIEMultiBitmap.Create;

  // Make our multi-bitmap store its own IO parameters list
  fIEMultiBitmap.ParamsEnabled := True;

  // Improve styling of TImageEnMView
  IEMView1.SetModernStyling( True, 180, 150 );
end;

procedure TMainForm.FormDestroy(Sender: TObject);
begin
  FreeAndNil( fIEMultiBitmap );
end;

procedure TMainForm.FileListBox1Change(Sender: TObject);
begin
  // Load selected image into Multi-Bitmap
  fIEMultiBitmap.Clear;
  fIEMultiBitmap.Read( FileListBox1.FileName );
  UpdateDisplay( True );
end;


procedure TMainForm.updPageClick(Sender: TObject; Button: TUDBtnType);
begin
  UpdateDisplay;
end;


// Save
procedure TMainForm.Button1Click(Sender: TObject);
begin
  SaveImageEnDialog1.AutoSetFilterFileType := ioTIFF;
  if SaveImageEnDialog1.execute then
    fIEMultiBitmap.Write( SaveImageEnDialog1.Filename );
end;

// Delete Page
procedure TMainForm.Button5Click(Sender: TObject);
begin
  fIEMultiBitmap.DeleteImage( updPage.Position );
  UpdateDisplay( True );
end;

// Show Page
procedure TMainForm.Button6Click(Sender: TObject);
var
  tmp:TMemoryStream;
begin
  tmp := TMemoryStream.Create;
  fIEMultiBitmap.Write( tmp, ioTIFF );
  tmp.Position := 0;

  fshowpage.ImageEnView1.IO.Params.TIFF_ImageIndex := updPage.Position;
  fshowpage.ImageEnView1.IO.LoadFromStreamTIFF( tmp );

  tmp.free;

  fshowpage.ImageEnView1.Fit;
  fshowpage.ShowModal;
end;

// Add/Insert page
// This inserts a single page loaded from a supported file
procedure TMainForm.btnAddPageClick(Sender: TObject);
var
  IdxStr: string;
begin
  // Select file to insert
  if OpenImageEnDialog1.Execute then
  begin
    // Choose the inserting page
    IdxStr := IntToStr( fIEMultiBitmap.Count );
    if InputQuery('Page Insertion Index','Specify the index of the new image', IdxStr ) = False then
      exit;

    // Insert the file
    fIEMultiBitmap.InsertImage( StrToIntDef( IdxStr, 0 ), OpenImageEnDialog1.FileName );

    // Update
    UpdateDisplay( True );
  end;
end;

procedure TMainForm.btnAdjustParamsClick(Sender: TObject);
var
  mio : TImageEnMIO;
begin
  // Attach our Multi-Bitmap to access its methods
  mio := TImageEnMIO.CreateFromIEMBitmap( fIEMultiBitmap );
  if mio.DoPreviews( updPage.Position ) then
    UpdateDisplay( True );
  mio.Free;
end;

procedure TMainForm.btnInsertPageClick(Sender: TObject);
begin
  // Select file to insert
  if OpenImageEnDialog1.Execute then
  begin
    // Append the file
    fIEMultiBitmap.AppendImage( OpenImageEnDialog1.FileName );
    // update
    UpdateDisplay( True );
  end;
end;

procedure TMainForm.btnMovePageClick(Sender: TObject);
var
  IdxStr: string;
begin
  // Choose the inserting page
  IdxStr := IntToStr( fIEMultiBitmap.Count );
  if InputQuery('Page Destination Index','Specify the new index of this page', IdxStr ) = False then
    exit;

  // Insert the file
  fIEMultiBitmap.MoveImage( updPage.Position, StrToIntDef( IdxStr, 0 ));

  // Update
  UpdateDisplay( True );
end;

procedure TMainForm.btnRotateClick(Sender: TObject);
begin
  // Rotate all frames of the Multi-Bitmap
  fIEMultiBitmap.RotateAll( 270 ); // 270 = 90 CW
  UpdateDisplay( True );
end;

procedure TMainForm.btnUpdateClick(Sender: TObject);
var
  idx: Integer;
begin
  // Set I/O params of the specified frame
  idx := updPage.Position;
  fIEMultiBitmap.Params[ idx ].TIFF_Compression  := TIOTIFFCompression( cmbTIFFCompression.ItemIndex );
  fIEMultiBitmap.Params[ idx ].TIFF_ImageDescription := edtTIFFImageDescription.Text;
  fIEMultiBitmap.Params[ idx ].TIFF_PageName := edtTIFFPageName.Text;
end;

procedure TMainForm.chkShowContentClick(Sender: TObject);
begin
  UpdateDisplay( True );
end;

procedure TMainForm.cmbTIFFCompressionChange(Sender: TObject);
begin
  btnUpdate.Enabled := True;
end;

procedure TMainForm.IEMIO1FinishWork(Sender: TObject);
begin
  ProgressBar1.Visible := False;
end;

procedure TMainForm.IEMIO1Progress(Sender: TObject; per: Integer);
begin
  ProgressBar1.Position := per;
  ProgressBar1.Visible := True;
end;

procedure TMainForm.IEMView1Click(Sender: TObject);
begin
  updPage.Position := IEMView1.SelectedImage;
  UpdateDisplay;
end;

procedure TMainForm.UpdateDisplay(bUpdateImages : Boolean = False);
var
  idx: Integer;
begin
  if bUpdateImages then
  begin
    lblMax.Caption := Format( 'of %d', [ fIEMultiBitmap.Count ]);
    if chkShowContent.Checked then
      IEMView1.AssignEx( fIEMultiBitmap )
    else
      IEMView1.clear;
  end;

  if updPage.Position >= fIEMultiBitmap.Count then
    updPage.Position := fIEMultiBitmap.Count - 1;
  
  if chkShowContent.checked then
    IEMView1.SelectedImage := updPage.Position;

  if fIEMultiBitmap.Count > 0 then
  begin               
    // Read I/O params of the specified frame
    idx := updPage.Position;
    cmbTIFFCompression.ItemIndex := ord( fIEMultiBitmap.Params[ idx ].TIFF_Compression );
    edtTIFFImageDescription.Text := fIEMultiBitmap.Params[ idx ].TIFF_ImageDescription;
    edtTIFFPageName.Text         := fIEMultiBitmap.Params[ idx ].TIFF_PageName;
  end;
  btnUpdate.Enabled := False;
end;

end.