Declaration
TIEPdfViewerDefaults = class
SelectionColor : TColor;
SelectionMerging : Integer;
HighlightColor : TColor;
FormFieldColor : TColor;
FormFieldAlpha : Integer;
Options : TIEPdfOptions;
DPI : Integer;
end;
Description
Class of
PdfViewerDefaults to specify defaults when initializing 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) |
Examples
// 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;
ImageEnView1.PDFViewer.Update;
// Do not highlight form fields
IEGlobalSettings().PdfViewerDefaults.FormFieldAlpha := 0;
ImageEnView1.PDFViewer.Update;
// Update selection color
IEGlobalSettings().PdfViewerDefaults.SelectionColor := clRed;
ImageEnView1.Update();
// 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;
ImageEnView1.Update();
// 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;
Repeat
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;
bmp.Free;