Today we here ( in Russia ) have a working day, so I’ll threat this as a community Saturday, not Friday
If anyone interested - here is a preview of one new feature from upcoming 1.1.0 version of the
Toolkit Productivity Tools package - an online document viewer.
It is capable to display very large PDF documents online without any acrobat plugin and of course, without downloading the source DPF file. Was tested fine with a 1.5 GB, 1000 pages 300 dpi scanned book.
The component in it’s current version is baed on a Vaadin Table component and does not use any custom client-side widgets.
You can take a look at the demo here -
http://demo.stor-m.ru/tpt-demo , go to “Online Document Viewer” tab (most right one). It displays the TPT’s manual as default but you’re free to upload your own pdf files as well. Please do not upload gigabyte files, however, as we have a limited bandwidth on this server.
The component is pure pdf renderer, so it dows not have any UI buttons for zoom,etc… it is left to component user, but I’ll add a demo toolbar into the demo in the release version of TPT.
For now component displays the PDF files in a Google’s book reader manner, but to release version there shoud be another two viewe modes - dual page and thumbnails.
So, hope you’ll like this. Any ideas/bugs/wisges/etc are welcome as usual
Table is just a wonderful component, its lazy loading feature, combined with the custom column renderer produces wide possibilities for displaying big contents fast. In this case, custom renderer is just an Embedded component which displays a page image from a custom stream resource.
At the server side,
IcePDF is used to dynamically extract rasterized presentations of a pdf page with the requested scale and transformation. This engine is quite fast and capable of walking the pdf document without loading it into the memory, so even gigabyte pdf files are opened in seconds.
But actually the viewer API does not tie to PDF only, it provides a DocumentRasterProvider interface instead which could be implemented to provide support for any other formats.
the last update of TPT says that the Document Viewer package and its deps were separated to a different project…is it a new add-on?..if so, which one??
