Re: Needed Urgent Help:How to display PDF conent of page in GWT Panel or frame or HTML in HtmlPanel + source code

[Philippe Lhoste]

On 14/11/2012 13:52, singh ajay wrote:
> I am generating PDF file using JRXML using Java JASPEREXPORTMANAGER.
> but i don't know how to view pdf in gwt UI.
> any frame or special container require.

Most of the time, the PDF file is downloaded, unless the user installed and activated some
plugin to show it in the browser, but then it uses the full page.

There is at least one (to my knowledge) tentative to make a JavaScript PDF reader, but I
am not sure if it is complete.

Now, I question the point of your request: either you want to deliver a PDF content,
generally to be saved on the user's computer, so you don't need to display it, or you want
to deliver some visual content to be displayed in a browser, and then you can use HTML or
canvas. I am not sure why you want to display PDF as part of a Web page.

--
Philippe Lhoste
-- (near) Paris -- France
-- http://Phi.Lho.free.fr
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[Christof Kaller]

Hi,

Philipe is wright. The user needs to install a plug-in. An alternative indeed is using a javascript rendering engine- don't remember the name of it, but know that there is one.

Another way is to use google docs for it, then u can actually view it in an iframe as well.


try:

<iframe src="http://docs.google.com/viewer?url=http%3A%2Fwww.maneofsite.com%2FnameOfPDF.pdf&embedded=true" width="600" height="780" style="border: none;"></iframe>

Christof

2012/11/15 Philippe Lhoste <Phi...@gmx.net>

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[Glenn Picher]

This is a nice idea. Unfortunately the PDF drew blank in Firefox, and drew instead of the PDF file a security warning in IE 10. Worked in Chrome and Safari though. (All on Windows.) It also draws with a grey border and some viewing controls you might or might not want. Thanks for the suggestion.

[Petro Blagodir]

Hello Ajay!

you need to do following things.

1. Create servlet (on server side) which will convert pdf to image

2. in gwt show image instead pdf

Please take a look at screen shot in the attachment, there is pdf viewer developed on gwt.

            if ("application/force-download".equals(fileType) ||"application/pdf".equals(fileType) ){

        response.setContentType("image/png");        

        try{        

            RandomAccessFile raf = new RandomAccessFile(file, "r");            

            FileChannel channel = raf.getChannel();

            ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());            

            PDFFile pdffile = new PDFFile(buf);

            if (pdffile.getNumPages() < pageNumber){

            pageNumber = pdffile.getNumPages();

            }

             PDFPage page = pdffile.getPage(pageNumber);

                BufferedImage img=null;            

                int w = (int) page.getBBox().getWidth();

                int h = (int) page.getBBox().getHeight();

                Rectangle rect = new Rectangle(0, 0, w, h);

                int rotation = page.getRotation();

                Rectangle rect1 = rect;

                if (rotation == 180) {

                rect1 = new Rectangle(0, 0, rect.height, rect.width);

                }                        

                img = (BufferedImage) page.getImage( (int)(w+w*coef), (int)(h+h*coef),rect1,null,true,true);                      

                ImageIO.write(createResizedCopy(img, (int)(w+w*coef), (int)(h+h*coef),fileName,rotate,isSmall,coef), imageOutput, response.getOutputStream());

           

            

            

            

Here is code example 

On Wednesday, November 14, 2012 at 2:52:33 PM UTC+2, singh ajay wrote:

Hi Folk,

can any one help me out with my problem,

I am generating PDF file using JRXML using Java JASPEREXPORTMANAGER.

but i don't know how to view pdf in gwt UI.

any frame or special container require. 

 

Do let me know.

 

Ragards,

Ajay Singh, Mumbai, India