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/DynaPDF/Create PDF with demo string

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 demo string

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

Project "Create PDF with demo string.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
EventHandler Sub Open() dim pdf as new MyDynapdfMBS dim d as new date dim f as FolderItem = SpecialFolder.Desktop.Child("Create PDF with demo string.pdf") pdf.SetLicenseKey "Starter" // For this example you can use a Starter, Lite, Pro or Enterprise License call pdf.CreateNewPDF f call pdf.SetDocInfo pdf.kdiSubject, "My first Xojo output" call pdf.SetDocInfo pdf.kdiProducer, "Xojo test application" call pdf.SetDocInfo pdf.kdiTitle, "My first Xojo output" // We want to use top-down coordinates 'call pdf.SetPageCoords pdf.kpcTopDown call pdf.Append // Just a test string... dim demoString as string = "My Demo String" // Write the demo string on this page // Get the bounding boxes dim mediaBox as DynaPDFRectMBS = pdf.GetBBox(PDF.kpbMediaBox) dim cropBox as DynaPDFRectMBS = pdf.GetBBox(PDF.kpbCropBox) // Compute the mid point and rotation angle dim ph, pw, rCenterX, rCenterY, alpha, c as Double if cropBox<>nil then pw = cropBox.Right - cropBox.Left ph = cropBox.Top - cropBox.Bottom rCenterX = cropBox.Left + pw * 0.5 rCenterY = cropBox.Bottom + ph * 0.5 c = sqrt(pw * pw + ph * ph) alpha = asin(ph / c) else pw = mediaBox.Right - mediaBox.Left ph = mediaBox.Top - mediaBox.Bottom rCenterX = mediaBox.Left + pw * 0.5 rCenterY = mediaBox.Bottom + ph * 0.5 c = sqrt(pw * pw + ph * ph) alpha = asin(ph / c) end if // The string width and Cap Height should be pre-computed if the string is static. // The font size must be set to 1000.0! call pdf.SetFont("Helvetica", pdf.kfsBold, 1000.0, true, pdf.kcpUnicode) dim textWidth as double = pdf.GetTextWidth(demoString) / 1000.0 // We need the cap height to center the text verticaly. dim capHeight as double = pdf.GetCapHeight / 1000.0 // Now we must compute the font size. The divisor (6.0 in this example) depends on the string width. // The value 6.0 produces good results with this demo string. If the string is longer or shorter then // you must adjust the divisor. Once a good value was found it works with every page format. // If the string is not static then you need to compute the divisor from the text's bounding box and page // format. However, this is usually not required. DynaPDF uses a static divisor... dim fontsize as Double if pw > ph then fontSize = ph / 6.0 else fontSize = pw / 6.0 end if if fontSize < 1.0 then fontSize = 10.0 end if dim si as double = sin(alpha) dim co as double = cos(alpha) // Center the text on the page dim tCenterX as double = (textWidth * fontSize) * 0.5 dim tCenterY as double = (capHeight * fontSize) * 0.5 dim x as double = rCenterX - co * tCenterX dim y as double = rCenterY - si * tCenterX dim tx as double = co * tCenterY dim ty as double = si * tCenterY tx = sqrt(tCenterY * tCenterY - tx * tx) ty = sqrt(tCenterY * tCenterY - ty * ty) x = x + tx y = y - ty // Create a transformation matrix dim m as new DynapdfMatrixMBS m.a = co m.b = si m.c = -si m.d = co m.x = x m.y = y // Now we can output the text. call pdf.ChangeFontSize(fontSize) call pdf.SetLineWidth(1.0) call pdf.SetColorSpace(pdf.kcsDeviceRGB) call pdf.SetStrokeColor(&h1F52C8) call pdf.SetTextDrawMode(pdf.kdmStroke) call pdf.WriteTextMatrix(m, demoString) call pdf.EndPage call pdf.CloseFile f.Launch 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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