In this blog post I am going to show you a very simple and quick example of jQuery viewer I built using the no viewer mode and the steps I went about to create it.
Running the Converter
I am going to use our online converter to create the HTML output I desire, but you can use the standalone Java Jar file to do the same thing or our webservice.
All I did on the online converter was choose the option labelled “Only Pages No Viewer” and clicked “Upload & Convert”. I could of customized the options further but for now I will leave all other options on default.
Upon completing the conversion process I am given several actions I can do, the two we are concerned with are “View Online” and “Download Zip File”.
If you click on “View Online” and then view the source code foe the converted page you will see that the <head> tag is absent from the HTML Markup, this is intentional and means that you converted it in the no viewer mode.
Interesting Note: Older versions of Internet Explorer (IE8 and below) may render this page incorrectly, this is due to the missing <head> tag; it causes them to render the page in the Quirks document mode which results in some bad formatting. You can change the document mode if you expereience this by going into tools and clicking on Developer Tools (or by pressing F12) and selecting the correct Document Mode in the Developer Tools (normally Internet Explorer 8 Standards).
Once you’ve confirmed that the files have been converted using the correct settings you can download them in a zip file using the link labelled “Download Zip File”.
Building the jQuery Viewer
With the files downloaded we can then unzip them into the directory we will be using for our jQuery Viewer. Each page of your original file should have a corresponding html file named after it’s page number.
Now we can create the index.html that will contain our jQuery Viewer. The basic structure I used has a container div, used mainly to centre all the content in the jQuery web application, a set of form elements, used to control the viewer and another div where we load whatever page we want to see into.
Below is the basic example code:
- The loadPage function uses an ajax call to load the content of our previously converted pages into the div with the id “page”, it also updates widths, and runs our font spacing adjustment code if needed. (This code is within a script tag in our converted pages).
- The updatePageNum function changes the contents of several tags to reflect the current page of the document. It also changes the hash of the page, triggering the hash change event described below.
- Upon document ready we bind the correct events to the buttons on the page (updatePageNum being called from each) and the event that is called upon changing the hash of the page.
Any further questions on the code do not hesitate to ask.
The resulting web app is quite responsive, has support for the forward and back buttons in the web browser, and can be easily adapted and improved.
IDRsolutions develop a Java PDF library, a PDF forms to HTML5 converter, a PDF to HTML5 or SVG converter and a Java Image Library that doubles as an ImageIO replacement. On the blog our team post about anything interesting they learn about.