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/DynaPDF/Create PDF with Signature on Windows

Required plugins for this example: MBS DynaPDF Plugin

You find this example project in your Plugins Download as a Xojo project file within the examples folder: /DynaPDF/Create PDF with Signature on Windows

This example is the version from Wed, 14th Sep 2021.

Project "Create PDF with Signature on Windows.xojo_binary_project"
Filetype text
End FileTypes
MenuBar MenuBar1
MenuItem UntitledMenu1 = ""
MenuItem FileMenu = "&File"
MenuItem FileQuit = "Quit"
MenuItem UntitledMenu5 = ""
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "&Undo"
MenuItem UntitledMenu0 = "-"
MenuItem EditCut = "Cu&t"
MenuItem EditCopy = "&Copy"
MenuItem EditPaste = "&Paste"
MenuItem EditClear = "Clear"
MenuItem UntitledMenu4 = ""
MenuItem UntitledMenu3 = ""
MenuItem UntitledMenu2 = ""
End MenuBar
Class App Inherits Application
Const Message = "This file was digitally signed with the Windows CryptAPI using a PKCS#12 certificate. It is also possible to use an arbitrary certificate of the user's certificate store. This could be a hardware or software certificate. The CryptAPI function calls are in both cases the same. Nothing special must be considered.\r\rThe appearance of the signature field was created with normal DynaPDF functions. However, it would also be possible to import a PDF page, an EMF file, or an image into the appearance template. When creating an individual signature appearance make sure to place the validation icon properly with PlaceSigFieldValidateIcon(). The appearance of the validation icon depends on the Acrobat version with which the file is opened. However, the unscaled size of that icon is always 100.0 x 100.0 Units. It can be scaled to every size you want but it is usually best to preserve the aspect ratio and the icon must be placed fully inside the appearance template."
EventHandler Sub Open() dim pdf as new MyDynapdfMBS dim d as new date pdf.SetLicenseKey "Lite" // For this example you can use a Starter, Lite, Pro or Enterprise License call pdf.CreateNewPDF nil // The output file is opened later call pdf.SetDocInfo pdf.kdiTitle, "Custom digital signature appearance" // We want to use top-down coordinates call pdf.Append call pdf.SetFont "Arial", pdf.kfsNone, 12.0, true, pdf.kcpUnicode call pdf.WriteFText pdf.ktaJustify, Message //* ---------------------- Signature field appearance ---------------------- */ dim sigField as integer = pdf.CreateSigField( "Signature", -1, 200.0, 500.0, 200.0, 80.0) call pdf.SetFieldColor(sigField, pdf.kfcBorderColor, pdf.kcsDeviceRGB, pdf.kNO_COLOR) // Place the validation icon on the left side of the signature field. call pdf.PlaceSigFieldValidateIcon(sigField, 0.0, 15.0, 50.0, 50.0) // This function creates a template into which you can draw whatever you want. The template // is already opened when calling the function; it must be closed when finish with EndTemplate(). // An appearance template of a signature field is reserved for this field. It must not be placed // on another page! // // In addition, it makes no sense to create an appearance template when the file is not digitally // signed later. Empty signature fields cannot contain a user defined appearance. call pdf.CreateSigFieldAP(sigField) call pdf.SaveGraphicState call pdf.Rectangle(0.0, 0.0, 200.0, 80.0, pdf.kfmNoFill) call pdf.ClipPath(pdf.kcmWinding, pdf.kfmNoFill) dim sh as integer = pdf.CreateAxialShading( 0.0, 0.0, 200.0, 0.0, 0.5, PDF.RGB(120, 120, 220), pdf.kPDF_WHITE, true, true) call pdf.ApplyShading(sh) call pdf.RestoreGraphicState call pdf.SaveGraphicState call pdf.Ellipse(50.5, 1.0, 148.5, 78.0, pdf.kfmNoFill) call pdf.ClipPath(pdf.kcmWinding, pdf.kfmNoFill) sh = pdf.CreateAxialShading( 0.0, 0.0, 0.0, 78.0, 2.0, PDF.kPDF_WHITE, PDF.RGB(120, 120, 220), true, true) call pdf.ApplyShading(sh) call pdf.RestoreGraphicState call pdf.SetFont("Arial", pdf.kfsBold + pdf.kfsUnderlined, 11.0, true, pdf.kcpUnicode) call pdf.SetFillColor(PDF.RGB(120, 120, 220)) call pdf.WriteFTextEx(50.0, 60.0, 150.0, -1.0, pdf.ktaCenter, "Digitally signed by:") call pdf.SetFont( "Arial", pdf.kfsBold + pdf.kfsItalic, 18.0, true, pdf.kcpUnicode) call pdf.SetFillColor(PDF.RGB(100, 100, 200)) call pdf.WriteFTextEx( 50.0, 45.0, 150.0, -1.0, pdf.ktaCenter, "DynaPDF") call pdf.EndTemplate // Close the appearance template. //* ------------------------------------------------------------------------ */ call pdf.EndPage // No fatal error occurred? if pdf.HaveOpenDoc then dim f as FolderItem = SpecialFolder.Desktop.Child("Create PDF with Signature.pdf") // Now we can sign the PDF file // In this example we load a PFX certificate file const password = "123456" if false then // read from file dim filePath as FolderItem = SpecialFolder.Desktop.Child("testcert.pfx") dim b as BinaryStream = BinaryStream.Open(filePath) dim certificateData as string = b.Read(b.Length) // sign call pdf.CloseAndSignPDFFile(f, certificateData, password) else // You can also use an arbitrary certificate of a certificate store. call pdf.CloseAndSignPDFFileWithDialog(f) end if f.Launch end if quit End EventHandler
End Class
Class MyDynaPDFMBS Inherits DynaPDFMBS
EventHandler Function Error(ErrorCode as integer, ErrorMessage as string, ErrorType as integer) As integer // output all messages on the console: System.DebugLog str(ErrorCode)+": "+ErrorMessage // and display dialog: Dim d as New MessageDialog //declare the MessageDialog object Dim b as MessageDialogButton //for handling the result d.icon=MessageDialog.GraphicCaution //display warning icon d.ActionButton.Caption="Continue" d.CancelButton.Visible=True //show the Cancel button // a warning or an error? if BitAnd(ErrorType, me.kE_WARNING) = me.kE_WARNING then // if user decided to ignore, we'll ignore if IgnoreWarnings then Return 0 d.Message="A warning occurred while processing your PDF code." // we add a third button to display all warnings d.AlternateActionButton.Caption = "Ignore warnings" d.AlternateActionButton.Visible = true else d.Message="An error occurred while processing your PDF code." end if d.Explanation = str(ErrorCode)+": "+ErrorMessage b=d.ShowModal //display the dialog Select Case b //determine which button was pressed. Case d.ActionButton Return 0 // ignore Case d.AlternateActionButton IgnoreWarnings = true Return 0 // ignore Case d.CancelButton Return -1 // stop End select End EventHandler
Property IgnoreWarnings As Boolean
End Class
End Project

See also:

The items on this page are in the following plugins: MBS DynaPDF Plugin.

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