unit uEditorPreview;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, uEditorBase, ImgList, PngImageList, StdActns, ActnList, TBX,
  TB2Item, TB2Dock, TB2Toolbar, JvExControls, JvComponent, JvNavigationPane,
  TB2ExtItems, TBXExtItems, uViewPreview, frxClass, ComCtrls, frxPreview,
  JvFormAutoSize, JvAppStorage, JvAppRegistryStorage, JvFormPlacement,
  pngimage, frxExportImage, frxExportPDF, frxDCtrl, frxDMPExport,
  frxGradient, frxChBox, frxCross, frxRich, frxChart, frxOLE, frxBarcode,
  ExtCtrls, dxLayoutLookAndFeels, JvComponentBase;

type
  IEditorPreview = interface(IEditorBase)
  ['{7E79BEFC-C817-43D9-A60F-9573D1777068}']
    function GetReport: TfrxReport;
    property Report: TfrxReport read GetReport;
    procedure LoadFromStream(AStream : TStream);
    function ExportToFile : String;
  end;

  TfEditorPreview = class(TfEditorBase, IEditorPreview)
    TBXToolbar1: TTBXToolbar;
    TBXItem7: TTBXItem;
    TBXItem33: TTBXItem;
    TBXItem34: TTBXItem;
    TBXItem39: TTBXItem;
    TBXSeparatorItem14: TTBXSeparatorItem;
    TBXSeparatorItem15: TTBXSeparatorItem;
    TBXSeparatorItem16: TTBXSeparatorItem;
    cbZoom: TTBXComboBoxItem;
    PreviewActionList: TActionList;
    PreviewSmallImageList: TPngImageList;
    PreviewLargeImageList: TPngImageList;
    actPrimeraPagina: TAction;
    actUltimaPagina: TAction;
    actPaginaAnterior: TAction;
    actPaginaSiguiente: TAction;
    TBXItem35: TTBXItem;
    TBXItem36: TTBXItem;
    actZoomIn: TAction;
    actZoomOut: TAction;
    actTodaPagina: TAction;
    actAnchoPagina: TAction;
    TBXSeparatorItem17: TTBXSeparatorItem;
    TBXItem37: TTBXItem;
    TBXItem40: TTBXItem;
    TBXItem41: TTBXItem;
    TBXItem42: TTBXItem;
    frxReport1: TfrxReport;
    actToolHand: TAction;
    actToolZoom: TAction;
    tbxZoom: TTBXItem;
    tbxMano: TTBXItem;
    TBXSeparatorItem18: TTBXSeparatorItem;
    frxBarCodeObject1: TfrxBarCodeObject;
    frxOLEObject1: TfrxOLEObject;
    frxChartObject1: TfrxChartObject;
    frxRichObject1: TfrxRichObject;
    frxCrossObject1: TfrxCrossObject;
    frxCheckBoxObject1: TfrxCheckBoxObject;
    frxGradientObject1: TfrxGradientObject;
    frxDotMatrixExport1: TfrxDotMatrixExport;
    frxDialogControls1: TfrxDialogControls;
    frxTIFFExport1: TfrxTIFFExport;
    frxPDFExport1: TfrxPDFExport;
    frxBMPExport1: TfrxBMPExport;
    procedure FormShow(Sender: TObject);
    procedure actPrimeraPaginaExecute(Sender: TObject);
    procedure actUltimaPaginaExecute(Sender: TObject);
    procedure actPaginaAnteriorExecute(Sender: TObject);
    procedure actPaginaSiguienteExecute(Sender: TObject);
    procedure actZoomInExecute(Sender: TObject);
    procedure actTodaPaginaExecute(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure FormResize(Sender: TObject);
    procedure actImprimirExecute(Sender: TObject);
    procedure actAnchoPaginaExecute(Sender: TObject);
    procedure actZoomOutExecute(Sender: TObject);
    procedure cbZoomItemClick(Sender: TObject);
    procedure actToolHandExecute(Sender: TObject);
    procedure actToolZoomExecute(Sender: TObject);
  private
    FPreview : TfrViewPreview;
    function GetReport: TfrxReport;
    procedure OnPageChanged(Sender: TfrxPreview; PageNo: Integer);
    procedure UpdateZoom;
  public
    constructor Create(AOwner: TComponent); override;
    property Report: TfrxReport read GetReport;
    procedure Print;
    procedure LoadFromStream(AStream : TStream);
    function ExportToFile : String;
  end;

var
  fEditorPreview: TfEditorPreview;

implementation

uses
  frxRes, frxUtils, frxPrinter, uCustomEditor, uSysFunc,
  frxFormUtils;

{$R *.dfm}

{ TfEditorBase1 }

function TfEditorPreview.GetReport: TfrxReport;
begin
  Result := frxReport1;
end;


procedure TfEditorPreview.FormShow(Sender: TObject);
begin
  inherited;
  UpdateZoom;
  actPrimeraPagina.Execute;
  FPreview.ShowEmbedded(Self);
  Report.ShowPreparedReport;
end;

procedure TfEditorPreview.actPrimeraPaginaExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.First;
end;

procedure TfEditorPreview.actUltimaPaginaExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.Last;
end;

procedure TfEditorPreview.actPaginaAnteriorExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.Prior;
end;

procedure TfEditorPreview.actPaginaSiguienteExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.Next;
end;

procedure TfEditorPreview.actZoomInExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.Zoom := FPreview.Preview.Zoom + 0.25;
end;

procedure TfEditorPreview.UpdateZoom;
begin
  cbZoom.Text := IntToStr(Round(FPreview.Preview.Zoom * 100)) + '%';
end;

procedure TfEditorPreview.actTodaPaginaExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.ZoomMode := zmWholePage;
  UpdateZoom;
end;

procedure TfEditorPreview.FormDestroy(Sender: TObject);
begin
  inherited;
  FPreview.Free;
end;

procedure TfEditorPreview.FormResize(Sender: TObject);
begin
  inherited;
  UpdateZoom;
end;

procedure TfEditorPreview.actImprimirExecute(Sender: TObject);
begin
  inherited;
  if not frxPrinters.HasPhysicalPrinters then
    frxErrorMsg(frxResources.Get('clNoPrinters'))
  else
    FPreview.Preview.Print;
  Enabled := True;
end;

procedure TfEditorPreview.actAnchoPaginaExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.ZoomMode := zmPageWidth;
  UpdateZoom;
end;

procedure TfEditorPreview.actZoomOutExecute(Sender: TObject);
begin
  inherited;
  FPreview.Preview.Zoom := FPreview.Preview.Zoom - 0.25;
end;

procedure TfEditorPreview.cbZoomItemClick(Sender: TObject);
var
  s: String;
begin
  FPreview.Preview.SetFocus;

  if cbZoom.ItemIndex = 6 then
    actAnchoPagina.Execute
  else if cbZoom.ItemIndex = 7 then
    actTodaPagina.Execute
  else
  begin
    s := cbZoom.Text;

    if Pos('%', s) <> 0 then
      s[Pos('%', s)] := ' ';
    while Pos(' ', s) <> 0 do
      Delete(s, Pos(' ', s), 1);

    if s <> '' then
      FPreview.Preview.Zoom := frxStrToFloat(s) / 100;
  end;

  UpdateZoom;
end;

procedure TfEditorPreview.actToolHandExecute(Sender: TObject);
begin
  if tbxMano.Checked then
    FPreview.Preview.Tool := ptHand
end;

procedure TfEditorPreview.actToolZoomExecute(Sender: TObject);
begin
  if tbxZoom.Checked then
    FPreview.Preview.Tool := ptZoom;
end;

procedure TfEditorPreview.OnPageChanged(Sender: TfrxPreview;
  PageNo: Integer);
var
  FirstPass: Boolean;
begin
  FirstPass := False;
  if Sender.PreviewPages <> nil then
    FirstPass := not Sender.PreviewPages.Engine.FinalPass;

  if FirstPass then
    StatusBar.Panels[0].Text := frxResources.Get('clFirstPass') +
      IntToStr(Sender.PageCount)
  else
    StatusBar.Panels[0].Text := Format(frxResources.Get('clPageOf'),
      [PageNo, Sender.PageCount]);
end;

constructor TfEditorPreview.Create(AOwner: TComponent);
begin
  inherited;

  with cbZoom.Strings do
  begin
    Clear;
    Add('25%');
    Add('50%');
    Add('75%');
    Add('100%');
    Add('150%');
    Add('200%');
    Add(frxResources.Get('zmPageWidth'));
    Add(frxResources.Get('zmWholePage'));
  end;

  FPreview := TfrViewPreview.Create(Self);
  Report.Preview := FPreview.Preview;
  FPreview.Preview.OnPageChanged := OnPageChanged;
end;

procedure TfEditorPreview.Print;
begin
  actImprimir.Execute;
end;

function TfEditorPreview.ExportToFile: String;
var
  AFile : String;
begin
  Result := '';
  AFile := DarFicheroTIFFTemporal;
  frxTIFFExport1.SeparateFiles := False;
  frxTIFFExport1.DefaultPath := ExtractFilePath(AFile);
  frxTIFFExport1.FileName := ExtractFileName(AFile);
  try
    if Report.Export(frxTIFFExport1) then
      Result := AFile;
  finally
    frxTIFFExport1.DefaultPath := '';
    frxTIFFExport1.FileName := '';
  end;
end;

procedure TfEditorPreview.LoadFromStream(AStream: TStream);
begin
  Report.PreviewPages.LoadFromStream(AStream);
end;

end.