Personal tools

Cookbook/PDF files

From HaskellWiki

< Cookbook(Difference between revisions)
Jump to: navigation, search
(smaller headlines)
(Pages with different sizes: translate OO-slang)
 
(One intermediate revision by one user not shown)
Line 6: Line 6:
   
 
* a name for the PDF file
 
* a name for the PDF file
* document information, an instance of [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#t%3APDFDocumentInfo PDFDocumentInfo]. You can use the data generated by [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#v%3AstandardDocInfo standardDocInfo].
+
* document information, of type [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#t%3APDFDocumentInfo PDFDocumentInfo]. You can use the data generated by [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#v%3AstandardDocInfo standardDocInfo].
* the default page size, an instance of [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF.html#t%3APDFRect PDFRect].
+
* the default page size, of type [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF.html#t%3APDFRect PDFRect].
 
* a [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF.html#t%3APDF PDF Action]
 
* a [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF.html#t%3APDF PDF Action]
   
Line 29: Line 29:
   
 
If you pass "Nothing" to [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#v%3AaddPage addPage], the default page size will be used for the size of the new page.
 
If you pass "Nothing" to [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF-Document.html#v%3AaddPage 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 [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF.html#t%3APDFRect PDFRect]).
+
We can pass it a different size (of type [http://hackage.haskell.org/packages/archive/HPDF/latest/doc/html/Graphics-PDF.html#t%3APDFRect PDFRect]).
   
 
Let’s create three pages, the last two pages with different dimensions:
 
Let’s create three pages, the last two pages with different dimensions:

Latest revision as of 14:17, 18 August 2009

For the following recipes you need to install HPDF, a pure Haskell PDF generation library.

[edit] 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 pdfFileName= "test1.pdf"
  let documentInfo = standardDocInfo 
  let defaultPageSize = PDFRect 0 0 200 300
 
  runPdf pdfFileName documentInfo defaultPageSize $ do
    addPage Nothing

[edit] 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 (of type PDFRect).

Let’s create three pages, the last two pages with different dimensions:

import Graphics.PDF
 
main :: IO ()
main = do
  let pdfFileName = "test2.pdf"
  let documentInfo = standardDocInfo 
  let defaultPageSize = PDFRect 0 0 200 300
 
  runPdf pdfFileName documentInfo defaultPageSize $ do
    addPage Nothing
    addPage $ Just $ PDFRect 0 0 100 100
    addPage $ Just $ PDFRect 0 0 150 150

[edit] 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 pdfFileName = "test3.pdf"
  let documentInfo = standardDocInfo 
  let defaultPageSize = PDFRect 0 0 200 300
 
  let pdfString = toPDFString "Hello World!"
  let pdfFont = PDFFont Times_Roman 32
  let pdfText = text pdfFont 10.0 10.0 pdfString
 
  runPdf pdfFileName documentInfo defaultPageSize $ do
    page <- addPage Nothing
 
    drawWithPage page $ do
      drawText pdfText