TekH
1f889d8b58
Introduced new models (`SignatureDto`, `SignatureCaptureDto`, `EnvelopeReceiverDto`) to support a signature-based workflow. Added services for handling API interactions (`SignatureService`, `AuthService`, `DocumentService`, `EnvelopeReceiverService`, `SignatureCacheService`). Enhanced configuration with `ApiOptions` and `PdfViewerOptions`. Integrated DevExpress features with custom data connection providers, in-memory report storage, and font loading utilities. Marked `AnnotationDto` and `AnnotationService` as `[Obsolete]` in favor of newer implementations. Added detailed documentation for coordinate systems, unit conversions, and usage scenarios.
66 lines
2.6 KiB
C#
66 lines
2.6 KiB
C#
namespace EnvelopeGenerator.WebUI.Client.Models.Constants;
|
||
|
||
/// <summary>
|
||
/// Represents the unit of measurement for coordinate values in signature positioning.
|
||
/// Used for converting coordinates between different systems (GdPicture14, PDF.js, iText7).
|
||
/// </summary>
|
||
public enum UnitOfLength
|
||
{
|
||
/// <summary>
|
||
/// Inch unit (1 inch = 25.4 mm).
|
||
/// This is the native unit used by GdPicture14 (EnvelopeGenerator.Form - Legacy VB.NET app).
|
||
/// Database stores all coordinates (X, Y, Width, Height) in INCHES.
|
||
/// </summary>
|
||
/// <remarks>
|
||
/// <b>Source:</b> GdPicture14.Annotations.AnnotationStickyNote uses INCHES natively.
|
||
/// <br/>
|
||
/// <b>Evidence:</b> VB.NET code directly assigns database values to annotation properties without conversion:
|
||
/// <code>
|
||
/// oAnnotation.Left = CSng(pElement.X) ' Direct assignment ? INCHES
|
||
/// oAnnotation.Top = CSng(pElement.Y)
|
||
/// </code>
|
||
/// <b>Standard Page Dimensions:</b>
|
||
/// <list type="bullet">
|
||
/// <item>A4: 8.27" × 11.69" (210mm × 297mm)</item>
|
||
/// <item>Letter: 8.5" × 11"</item>
|
||
/// </list>
|
||
/// </remarks>
|
||
Inch = 0,
|
||
|
||
/// <summary>
|
||
/// PDF Point unit (1 point = 1/72 inch).
|
||
/// This is the standard unit used by PDF specification and PDF.js viewer.
|
||
/// </summary>
|
||
/// <remarks>
|
||
/// <b>Definition:</b> According to PDF specification and Microsoft documentation:
|
||
/// <br/>
|
||
/// <i>"PDF pages are sized in point units. 1 pt == 1/72 inch"</i>
|
||
/// <br/><br/>
|
||
/// <b>Conversion Formula:</b>
|
||
/// <code>
|
||
/// points = inches * 72.0
|
||
/// inches = points / 72.0
|
||
/// </code>
|
||
/// <b>Important:</b> Point ? Pixel!
|
||
/// <list type="bullet">
|
||
/// <item><b>Point (pt):</b> Device-independent unit (always 1/72 inch)</item>
|
||
/// <item><b>Pixel (px):</b> Device-dependent unit (varies with screen DPI)</item>
|
||
/// <item>At 72 DPI: 1 point = 1 pixel (coincidence)</item>
|
||
/// <item>At 96 DPI: 1 point ? 1.33 pixels</item>
|
||
/// <item>At 300 DPI: 1 point ? 4.17 pixels</item>
|
||
/// </list>
|
||
/// <b>Standard Page Dimensions (in points):</b>
|
||
/// <list type="bullet">
|
||
/// <item>A4: 595 × 842 points (8.27" × 11.69" × 72)</item>
|
||
/// <item>Letter: 612 × 792 points (8.5" × 11" × 72)</item>
|
||
/// </list>
|
||
/// <b>Usage in EnvelopeGenerator:</b>
|
||
/// <list type="bullet">
|
||
/// <item>PDF.js viewer expects coordinates in points</item>
|
||
/// <item>iText7 library uses points for PDF manipulation</item>
|
||
/// <item>PSPDFKit (Web) uses points for annotation placement</item>
|
||
/// </list>
|
||
/// </remarks>
|
||
Point
|
||
}
|