Given an earlier reply from Maruan:
"you can get the width of a string using PDFont.getStringWidth(String text)"
Is it not true one needs to know the font size to determine the string width?
My goal is to determine if a field value will fit in a field at the specified
font size on the form.
...
//get field size - 1 unit = 1/72 inch
float fieldSize = field.getWidgets().get(0).getRectangle().getWidth();
//get field value size
PDFont font = PDType1Font.HELVETICA;
float fieldLength = font.getStringWidth(someValue);
...
1. How can an accurate length be calculated without a Font Size??
2. And, the getStringWidth() method returns a value such as 2780.0 for a 5
character field .. what does that number represent?
Thanks again.
> On Jun 16, 2016, at 2:19 PM, Tilman Hausherr <thaush...@t-online.de> wrote:
>
> Am 16.06.2016 um 20:56 schrieb Barry Neu:
>> Thank you Tilman.
>>
>> I was poking around trying to find where to get the Font and Font size for a
>> PDTextField but not having any luck.
>> Is it in the CosDictionary or what is the proper way to find those 2 pieces
>> of information?
>
> getDefaultAppearance()
>
> you would have to parse that.
>
> I see there's also getDefaultAppearanceString() which is more advanced, but
> this isn't public. See the source code of PDDefaultAppearanceString to see
> what can be done with that, and make a copy for yourself.
>
> PDDefaultAppearanceString getDefaultAppearanceString() throws IOException
> {
> COSString da = (COSString) getInheritableAttribute(COSName.DA);
> PDResources dr = getAcroForm().getDefaultResources();
> return new PDDefaultAppearanceString(da, dr);
> }
>
>
> Tilman
>
>
>>
>> Really appreciate the support.
>>
>>> On Jun 13, 2016, at 2:51 PM, Tilman Hausherr <thaush...@t-online.de> wrote:
>>>
>>> Am 13.06.2016 um 22:36 schrieb Barry Neu:
>>>> Thank you for the reply.
>>>> I could store meta data about the fields’ capacity as a last resort.
>>>> However, there are about 50 different forms to work with and the number
>>>> will continue to grow.
>>>>
>>>> Including Tilman’s reply here:
>>>> "Calculate the width of the /Rectangle. 1 unit = 1/72 inch.”
>>>>
>>>> Are the /Rect coordinates represented in the following order?
>>>> Left rectangle boundary, Top, Right, Bottom
>>>>
>>>> So, 91.095 - 51.855 = 39.24/72s inch wide (or a little over a 1/2 inch)??
>>>>
>>>> And, how does one get to the /Rect data?
>>> Get the widgets of the field
>>>
>>> PDField.getWidgets(). Usually there is only one (unless you have several
>>> widgets, i.e. that the field appears several times in the PDF. So do this
>>> call:
>>>
>>> getWidgets().get(0).getRectangle().getWidth()
>>>
>>> What is in the PDF shouldn't matter, unless for debugging. I.e. don't try
>>> to parse the PDF yourself.
>>>
>>> I suggest you have a look at the examples in the source download,
>>> especially in org.apache.pdfbox.examples.interactive.form.
>>>
>>> Tilman
>>>
>>>> I have a debug session open in Eclipse but am not seeing the /Rect data in
>>>> ether the PDField or PDAcroForm.
>>>>
>>>>> On Jun 13, 2016, at 12:32 PM, Aaron Mulder <ammul...@gmail.com> wrote:
>>>>>
>>>>> If the form isn't changing, can you just check out the field
>>>>> definition in the PDF doc? Here's one from the PDF form I'm working
>>>>> with:
>>>>>
>>>>> << /Type /Annot /T (SlotsTotal 19) /V () /Rect [ 51.855 457.452 91.095
>>>>> 478.332
>>>>> ] /DV () /FT /Tx /DA (/Helvetica 12 Tf 0 g) /F 4 /MK 1972 0 R /Q 1
>>>>> /Subtype
>>>>> /Widget >>
>>>>>
>>>>> The /Rect units aren't in pixels but I assume the text width
>>>>> calculation would be the same so it would work out.
>>>>>
>>>>> My PDF was originally a Linearized mess but I opened it and saved it
>>>>> in Preview on OS X and then all the form elements came out in plain
>>>>> text which made it easy to inspect in a text editor.
>>>>>
>>>>> Thanks,
>>>>> Aaron
>>>>>
>>>>>
>>>>> On Mon, Jun 13, 2016 at 1:32 PM, Barry Neu <barry....@gmail.com> wrote:
>>>>>> Hello.
>>>>>>
>>>>>> Is it possible to calculate the pixel width of a text field on a
>>>>>> fillable PDF?
>>>>>> If so, is there an example available or where can I look to research?
>>>>>>
>>>>>> Some context:
>>>>>> I’m working with PDFBox 2.0.
>>>>>> Data for a fillable form is collected in a web user interface. If the
>>>>>> value for a given field exceeds the field capacity on the form, the
>>>>>> value should be populated on an addendum form. The font size of the
>>>>>> field cannot scale down below a particular value.
>>>>>>
>>>>>> The font and font size are known in advance so the length of the Value
>>>>>> can be calculated. But I need to know the pixel capacity of the field to
>>>>>> know if the value will “fit”.
>>>>>> Also open to an alternate strategy if someone has solved differently.
>>>>>>
>>>>>> Thanks for any help.
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