If the text exceeds the size of the page, it will not stop. The former will take a string and place it starting at specific (x, y) coordinates. This is when PDF::Writer#add_text and PDF::Writer#add_text_wrap are useful. Sometimes, however, it is necessary for the author of a document generation program to indicate precisely where text should go. By no means is it capable of replacing a professional layout program (or even a simple word processor), but it is very good at what it does. The layout engine in PDF::Writer is extensive and somewhat extensible. If your text will not fit on a single page, then a new page will automatically be created. That means that if your text will not fit on a single line, then it will be wrapped. The PDF::Writer#text method takes care of all text wrapping for you, the writer. Send_data _pdf.render, :filename => "hello.pdf", The changes to make this work aren’t large: While it’s certainly useful to be able to write PDF documents directly to disk, more useful for many developers is the ability to send a generated PDF across the network. The text method handles any text wrapping or pagination that needs to be done because the text will not fit on the displayed page. This document is then saved as “hello.pdf”. The text “Hello, Ruby.” is added to the document at 72 points in the centre of the line. Pdf.text "Hello, Ruby.", :font_size => 72, :justification => :centerĪfter requiring PDF::Writer, a document is created with the default options and the “Times-Roman” default font is selected. The simplest possible program to write with PDF::Writer is, of course, a “hello, world”-type of program. When running the demo programs (available as a separate download for RubyGems users), remember to run them with ruby -rubygems demo-name. The most reliable way to do this is to require 'rubygems' at the head of your scripts. The easiest way to do this is by setting the RUBYOPT environment variable to include rubygems. Before you can use PDF::Writer, you must load the RubyGems library. The second is for users of the PDF::Writer RubyGem. This can be fixed by building Ruby yourself or finding someone who has compiled it properly and installing that version. If you are using this version of PDF::Writer, the Ruby initially included was compiled with the wrong endianness and is unable to read images properly. The first is for users of PDF::Writer on Mac OS X 10.4 (“Tiger”). There are two well-known problems with installing and using PDF::Writer. tar.gz archives, you will also need to install the latest versions of Transaction::Simple and color-tools. If, instead, you choose to install PDF::Writer from the. The preferred way to do this is with RubyGems, as this will drag in the prerequisite libraries. The first step in using PDF::Writer is to install it. This article does not provide an introduction to Ruby itself. This article is intended to provide an even briefer introduction to the most interesting aspects of PDF::Writer, introduce a couple of techniques that are as of yet not (fully) documented, and provide a brief insight into the future of this vibrant project. As of the latest version, the manual-which is itself generated with PDF::Writer-is ninety-five pages and covers not only the various aspects of PDF::Writer, but its prerequisite libraries (Transaction::Simple and color-tools). One of the things that sets PDF::Writer apart from most other projects is the amount of documentation provided. As of this writing, the current version is PDF::Writer 1.1.3. Earlier this year, I started reworking the API to PDF::Writer and by June, I had something that I was happy with and released it as version 1.0. My needs passed, but I continued to plan an upgrade to PDF::Writer, but was distracted with other projects for some time. With some effort, I ported an initial pass to Ruby and released it as a technology preview in September 2003 (ruby-talk:82246). I looked around and found the free PHP library “cPDF” by R & OS of New Zealand. TAKAHASHI Hitoshi released bindings to PDFlib in 2002, but PDFlib is commercially licensed software, which makes it inappropriate for a wide variety of projects.Īround the same time, I had need of a PDF document generator to tie in with some Ruby code I was working for a consulting job. Noritsugu Nakimura had written bindings to ClibPDF and Panda PDF in 2001 the interfaces never left “alpha” status. There were three C library bindings written to work with existing libraries, but these worked best in Unix environments, not Windows environments. Two years ago, Ruby had no cross-platform libraries to create PDF documents. This introduction covers basic creation, partial document generation and customization, and Rails-generated documents. In this article, Austin Ziegler introduces the creation of a variety of types of documents with PDF::Writer for Ruby.
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