High level methods for filling forms

[Stefano D'Amico]

Hi Gal,
have you sample code on how to fill forms?

Best regards
Stefano

[Gal Kahana]

Hi Stefano,

i'm afraid that i don't have anything like this yet.

tell you what though, we are in the middle of a discussion about this in the github issues, and there are already code samples,

parhaps going through it will help you:

https://github.com/galkahana/HummusJS/issues/57

[and once we get through this i'll write something up].

Gal.

[Stefano D'Amico]

Awesome! Thanks Gal!

[Stefano D'Amico]

Hi,

I have a problem to set the font position of my acroform...

/Tx BMC 

BT

/Helv 9 Tf 0 g

0 g

2 3.1835 Td                      <---- I do not know calculate it!

(Hello world) Tj

ET

EMC

It depends on the alignment of the text (Left, Center, Right) 

Some idea?

Best Regards

Stefano

[Gal Kahana]

you can use the appearance stream bbox + compute the string width using the font widths array (or just do left align...)

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[Stefano D'Amico]

My code is...

...

ObjectIDType AP_id;

std::string xValue = "Hello World!";

PDFFormXObject* xobjectForm = pdfWriter.StartFormXObject(PDFRectangle(0,0,X,Y));   //X,Y are BBox dimensions (parameters obtained from Rect property of Acroform field)

const std::string font_file = "C:\\Work\\PDF-Writer\\PDF-Writer_src\\TestMaterials\\fonts\\arial.ttf";

PDFUsedFont* uFont = pdfWriter.GetFontForFile(font_file);

AbstractContentContext::TextOptions textOptions(uFont,9,AbstractContentContext::eGray,0);

// PDFUsedFont::TextMeasures tm = uFont->CalculateTextDimensions(xValue, 9);

XObjectContentContext* xobjectContentContext = xobjectForm->GetContentContext();

xobjectContentContext->WriteFreeCode("/Tx BMC \n");

xobjectContentContext->WriteText(2,3.1835,xValue,textOptions);    // To calculate!!!

xobjectContentContext->WriteFreeCode("EMC");

AP_id = xobjectForm->GetObjectID();

pdfWriter.EndFormXObjectAndRelease(xobjectForm);

return AP_id;  // /N 

..

Should I use CalculateTextDimensions() to calculate the length of the string?

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[Gal Kahana]

If you have a PDFUsedFont instance then yeah, use it.

[Stefano D'Amico]

Thanks Gal, I will try it. :-)