ImageEn, unit iesettings




property PdfViewerDefaults: TIEPdfViewerDefaults;


Set key defaults for the PdfViewer and PDF loading methods when using the PDFium PlugIn.

Property Description Default Value
SelectionColor The color of selected text in the PdfViewer clElectricBlue ($00FE8E32)
SelectionMerging Merges closely aligned selections into single ones. Sometimes the words in PDF documents have widely spaced letters that show as multiple selections. If you specify a value other than zero for SelectionMerging, then selections that are less than that number PDF points apart will be merged into one 3
HighlightColor The color of highlighted text when HighlightText is used clTangerine ($00328EFE)
FormFieldColor The color of all editable form fields when form editing is enabled clElectricBlue ($00FE8E32)
FormFieldAlpha The transparency of the form field color fill when form editing is enabled 25
Options Default value for Options [iepoAutoButtons, iepoAnnotations, iepoOptimizeForLCD]
DPI The scale to display PDF documents with PdfViewer and when loading to render to a bitmap System DPI (e.g. 96)


// Don't draw annotations when rendering PDF files
IEGlobalSettings().PdfViewerDefaults.Options := IEGlobalSettings().PdfViewerDefaults.Options - [iepoAnnotations];

// Highlight form fields with yellow fill
IEGlobalSettings().PdfViewerDefaults.FormFieldColor := clYellow;
IEGlobalSettings().PdfViewerDefaults.FormFieldAlpha := 50;

// Do not highlight form fields
IEGlobalSettings().PdfViewerDefaults.FormFieldAlpha := 0;

// Update selection color
IEGlobalSettings().PdfViewerDefaults.SelectionColor := clRed;

// When rendering PDF files adjust for screen DPI
// This is the default, and the typical display size of PDF documents
IEGlobalSettings().PdfViewerDefaults.DPI := Screen.PixelsPerInch; // or Form.CurrentPPI
ImageEnView1.IO.LoadFromFilePDF( 'C:\Test.pdf' );

// When rendering PDF files show at standard size
IEGlobalSettings().PdfViewerDefaults.DPI := 72; // PDF files are 72 DPI
ImageEnView1.IO.LoadFromFilePDF( 'C:\Test.pdf' );

// When rendering PDF files scale to double size
IEGlobalSettings().PdfViewerDefaults.DPI := 144; // PDF files are 72 DPI, so 144 is 200% size
ImageEnView1.IO.LoadFromFilePDF( 'C:\Test.pdf' );

// Do not show very close selections as a single selection
IEGlobalSettings().PdfViewerDefaults.SelectionMerging := 0;

// Save all pages of a PDF file to PNG
filename := 'C:\doc.pdf';
outputFolder := 'D:\';
IEGlobalSettings().PdfViewerDefaults.DPI := 144; // PDF files are 72 DPI, so 144 is 200% size
bmp := TIEBitmap.Create;
bmp.ParamsEnabled := True;
idx := 0;
  bmp.Params.ImageIndex := idx;
  bmp.Read( filename );
  bmp.Write( IncludeTrailingBackSlash( outputFolder ) + format( '%s_%d.png', [ ExtractFilename( filename ), idx+1 ] ));
  inc( idx );
Until idx > bmp.Params.ImageCount - 1;