B4J Question How to calculate string width for PDFBox

[MarcRB]

I made some simple functions for easy writing on top of an existing PDF.
Thanks to DonManfred post: PDFBox post#4

I need to calculate stringwidth for center align and right align.
On StackOverflow I found the stringwidth could by calculated with a function at font object.
But in the for B4J parsed PDFBox lib the font is set by FontAndColorHelper. That object doesn't support the width calculation.
What to do?

Sub mmToPDFpixel(intmm As Double)As Int
    Dim intResult As Int
    '1/72 inch = 0,0352777777777778 cm = 1 pixel
    '1cm Is dus:   1cm / 0,0352777777777778cm = 28,34pixels --> 28 pixels
    '10mm Is dus:   10mm / 0,352777777777778mm = 28,34pixels --> 28 pixels
'    24mm Is dus:   24mm / 0,352777777777778mm = 68,03pixels --> 68 pixels
    If intmm = 0 Then
        intResult = 0
    Else
        intResult = Ceil(intmm / 0.352777777777778)
    End If
    Return intResult
End Sub

Sub SetPDFImage(cs As PDPageContentStream,doc As Object ,intXmmStart As Int, intYmmStart As Int, intHeightmm As Int, intWidthmm As Int,strFilePath As String)
    Dim img As PDImageXObject
    img.Initialize(doc,strFilePath) 'img
    cs.drawImage2(img,mmToPDFpixel(intXmmStart), mmToPDFpixel(intYmmStart), mmToPDFpixel(intHeightmm), mmToPDFpixel(intWidthmm))
End Sub

Sub SetPDFHorzLine(cs As PDPageContentStream ,intXmmStart As Int, intYmmStart As Int, intmmlen As Int)
    cs.addLine(mmToPDFpixel(intXmmStart),mmToPDFpixel(intYmmStart) ,mmToPDFpixel(intXmmStart+intmmlen),mmToPDFpixel(intYmmStart))
    cs.closeAndStroke
End Sub

Sub SetPDFVertLine(cs As PDPageContentStream ,intXmmStart As Int, intYmmStart As Int, intmmlen As Int)
    cs.addLine(mmToPDFpixel(intXmmStart),mmToPDFpixel(intYmmStart) ,mmToPDFpixel(intXmmStart),mmToPDFpixel(intYmmStart-intmmlen))
    cs.closeAndStroke
End Sub

Sub SetPDFText(cs As PDPageContentStream, Fontname As Object, intFontSize As Int, intRcolor As Int, intGColor As Int, intBcolor As Int, intAlign As Int, blnLandscape As Boolean, intX As Int, intY As Int, strText As String)
    Dim intPageWidth As Int
    Dim intTextWidth As Int
    '
    If blnLandscape = True Then
        intPageWidth = 297 'A4 in mm
    Else
        intPageWidth = 210 'A4 in mm
    End If
    
    cs.beginText()
    cs.setFont(Fontname,intFontSize) 'Font, Font size
    cs.setNonStrokingColor(intRcolor,intGColor,intBcolor) 'Color
    cs.setStrokingColor(intRcolor,intGColor,intBcolor) 'color in my case the same color
        
    intTextWidth = 90 'mm  for test purpose a fixed value because string width calculation is not working yet.
    'intTextWidth = Fontname.getStringWidth(strText) / 1000 * intFontSize
    
    Select intAlign
        Case 2
            intX =  mmToPDFpixel(intPageWidth-(intX+intTextWidth))
        Case 3
            intX =  mmToPDFpixel(Ceil((intPageWidth-intTextWidth)/2))
        Case Else
            intX =  mmToPDFpixel(intX)
    End Select
    intY =  mmToPDFpixel(intY)
    
    cs.newLineAtOffset(intX,intY) ' text position
    cs.showText(strText) 'text
    cs.endText()
End Sub

Thanks in advance,
Marc