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(Drawing a simple text)
(Drawing a simple text)
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* draw on a given page using [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#v%3AdrawWithPage drawWithPage] and the Draw action from above
 
* draw on a given page using [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#v%3AdrawWithPage drawWithPage] and the Draw action from above
   
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Example:
TODO
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<haskell>
  +
import Graphics.PDF
  +
  +
main :: IO ()
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main = do
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let outputFileName= "test3.pdf"
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let documentInfo = standardDocInfo
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let defaultPageSize = PDFRect 0 0 200 300
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  +
runPdf outputFileName documentInfo defaultPageSize $ do
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let pdfString = toPDFString "Hello World!"
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let pdfFont = PDFFont Times_Roman 32
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let pdfText = text pdfFont 10.0 10.0 pdfString
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let drawAction = drawText pdfText
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page <- addPage Nothing
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drawWithPage page drawAction
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</haskell>

Revision as of 08:47, 24 April 2009

For the following recipes you need to install HPDF.

1 Creating an empty PDF file

runPdf generates a PDF file in the file system. You need to pass it four things:

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

2 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

3 Drawing a simple text

To draw a simple text you need to take the following steps:

Example:

import Graphics.PDF
 
main :: IO ()
main = do
  let outputFileName= "test3.pdf"
  let documentInfo = standardDocInfo 
  let defaultPageSize = PDFRect 0 0 200 300
 
  runPdf outputFileName documentInfo defaultPageSize $ do
    let pdfString = toPDFString "Hello World!"
    let pdfFont = PDFFont Times_Roman 32
    let pdfText = text pdfFont 10.0 10.0 pdfString
    let drawAction = drawText pdfText
    page <- addPage Nothing
    drawWithPage page drawAction