Cookbook/PDF files
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For the following recipes you need to install HPDF.
Creating an empty PDF file
runPdf generates a PDF file in the file system. You need to pass it four things:
- a file name for the PDF file
- document information, an instance of PDFDocumentInfo. You can use the data generated by standardDocInfo.
- the default page size, an instance of PDFRect.
- a PDF Action
Let's create an empty PDF file with the name "test1.pdf". We use addPage to add an empty page.
import Graphics.PDF
main :: IO ()
main = do
let outputFileName= "test1.pdf"
let documentInfo = standardDocInfo
let defaultPageSize = PDFRect 0 0 200 300
runPdf outputFileName documentInfo defaultPageSize $ do
addPage Nothing
Pages with different sizes
If you pass "Nothing" to addPage, the default page size will be used for the size of the new page. We can pass it a different size (an instance of PDFRect).
Let’s create three pages, the last two pages with different dimensions:
import Graphics.PDF
main :: IO ()
main = do
let outputFileName= "test2.pdf"
let documentInfo = standardDocInfo
let defaultPageSize = PDFRect 0 0 200 300
runPdf outputFileName documentInfo defaultPageSize $ do
addPage Nothing
addPage $ Just $ PDFRect 0 0 100 100
addPage $ Just $ PDFRect 0 0 150 150
Drawing a simple text
To draw a text you need to take the following steps:
- convert the text to a PDFString using toPDFString
- create a PDFFont, passing it
- a FontName
- a font size
- create a PDFText using text and the data above
- draw the PDFText with drawText
TODO