Is there a good web application for manipulating pdf files? [closed] - javascript

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Is there a good web application for manipulating a PDF files? For example, drag and drop images to it and save for future reference, then remove the dropped images anytime etc. I want to integrate it with my existing web application also.
EDIT:
These links I have came across while searching. Might be useful for someone searching the same.:)
PDFescape
Crocodoc
A.nnotate.com(a.nnotate.com)
GroupDocs Annotation(groupdocs.com/apps/annotation)

Mozilla has pdf.js which renders PDF files using HTML5. This same script is used in the built-in PDF reader of recent Firefox browsers.
It's experimental, but you could hack the code and do whatever you want with it.

If you are looking for just an online tool which will spit the pdf file use - Sejda
there is a lot of other tools available online too
PDF Sharp will allow you to do all sort of manipulation that you require. It is open source, free to use. You can download it from here..
Features include
Creates PDF documents on the fly from any .Net language
Easy to understand object model to compose documents
One source code for drawing on a PDF page as well as in a window or on the printer
Modify, merge, and split existing PDF files
Images with transparency (color mask, monochrome mask, alpha mask)
Newly designed from scratch and written entirely in C#
The graphical classes go well with .Net

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Convert Flash AS3 Games into HTML5 Games [closed]

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I want to convert Flash Game (AS3) to Html5 Game. I have all assets like .fla file and all .as files. But I am unable to find any tool or way to convert that into html5 game.
I used Flash CS6 using toolkit for CreateJS but it only converts animation in html5. I also tried to use Google's Swiffy extension in Flash CS6, but it was also not working. I think Swiffy is now discontinued by Google.
Question:
So is there any way to convert Flash/AS3 sources with interactivity into html5?
[EDIT]
I also tried to use google swiffy extension in Adobe Flash Pro CS6 but it was also not working. I think google swiffy is now discontinued.
If you have any actionscript in your game (which I assume a game would) it won't convert property with the common swf conversion tools out there. Regardless, interpreted script games (such as the JVM in this case) are disgusting and just further the PC requirements of your users. Your only two options are to stick with Actionscript or to build it from scratch. You can find as3 to javascript converters for your class files but there's other things such a lib dependencies and other factors that you'd have to take account for.
If all of your logic is in your frames:
Please dont do that again.
Convert your frame code to Class files
Use the converter

How to create a QR code reader in a HTML5 website? [closed]

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I was looking for possibility to create QR code reader in my HTML5 based web page. I've done some googling and all the links point me to the mobile applications.
Please help me with some pointers as to how I can use HTML5 and JavaScript to read a QR code containing a url and then redirect the browser to that URL.
There aren't many JavaScript decoders.
There is one at http://www.webqr.com/index.html
The easiest way is to run ZXing or similar on your server. You can then POST the image and get the decoded result back in the response.
The jsqrcode library by Lazarsoft is now working perfectly using just HTML5, i.e. getUserMedia (WebRTC). You can find it on GitHub.
I also found a great fork which is much simplified. Just one file (plus jQuery) and one call of a method: see html5-qrcode on GitHub.
Reader they show at http://www.webqr.com/index.html works like a charm, but literaly, you need the one on the webpage, the github version it's really hard to make it work, however, it is possible. The best way to go is reverse-engineer the example shown at the webpage.
However, to edit and get the full potential out of it, it's not so easy. At some point I may post the stripped-down reverse-engineered QR reader, but in the meantime have some fun hacking the code.
Happy coding.
The algorithm that drives http://www.webqr.com is a JavaScript implementation of https://github.com/LazarSoft/jsqrcode. I haven't tried how reliable it is yet, but that's certainly the easier plug-and-play solution (client- or server-side) out of the two.

JS library for creating a mindmap like interface [closed]

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I have to create an interface similar to what http://www.madeiracloud.com provides for drawing a network architecture (for different purposes than what they are doing).
Basically users should be able to drag & drop elements to a canvas and connect them using directional arrows.
What library should I use for this? I'm looking at d3, raphael and ocanvas.
Raphaël ( http://raphaeljs.com/ )in combination with the Dracula Graph Library( http://dracula.ameisenbar.de/ ) will get you started.
and also thejit is perfect:
Multi-Trees
The JavaScript InfoVis Toolkit provides tools for creating Interactive Data Visualizations for the Web.
http://thejit.org/
Edit:
you can also take a look at Processing.js
http://processingjs.org/
Processing.js is the sister project of the popular Processing visual programming language, designed for the web. Processing.js makes your data visualizations, digital art, interactive animations, educational graphs, video games, etc. work using web standards and without any plug-ins. You write code using the Processing language, include it in your web page, and Processing.js does the rest.
You should take a look at the MindMap project which use Raphael.js internally.
You can find the demo at http://kenneth.kufluk.com/google/js-mindmap/
In a commercial context you should also take a look at what yFiles for HTML has to offer.
It's a generic graph drawing and editing javascript library which solves your "drag and drop and connect" use-case easily. There is also a specific mind map example available online:
but in this application nodes are not created via drag and drop. This however of course is possible, too, as can be seen in this online demo.
The specific strengths of that library are automatic layout/arrangement of nodes and connections, so if you are creating larger networks or populating the graph automatically from an external data-source these come in very handy. However if you don't require this feature set, simpler solutions may work, too, of course. Note that d3 has the focus on viewing data, and is not so much about user interaction and creating graphs interactively.
Disclaimer: I work for the company that creates that library, however I do not represent my employer on SO. My comments are my own.

JavaScripted Augmented Reality [closed]

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Does anyone have experience with a JavaScript library for Augmented Reality?
If so, can you recommend one?
EDIT:
Not sure how to better clarify this... By Augmented Reality I mean using device webcam (laptop, smartphone, tablet) and overlapping elements over the video feed on screen. Ofen, the overlapping is done based on a marker the algorithm searches for within each frame and makes calculations about its position in space.
Hope that's enough.
Thanks.
I think this is what you might be looking for. JSARToolkit is a direct port of Flash FLARToolkit from Ilmari Heikkinen. Great tutorial you may also want to check out and a link to the Git repo.
http://weblog.bocoup.com/javascript-augmented-reality/
https://github.com/kig/JSARToolKit
You can try skarf.js, a framework that I have created for handling JavaScript augmented reality libraries in Three.js.
It currently integrates JSARToolKit and js-aruco, so you can easily switch between these two libraries to decide on the more suitable one to use.
This framework takes care of a number of things for you, including automatic loading of models when the associated markers are detected (association is specified in a JSON file). There is also a GUI marker system which allows users to control settings using AR markers.
Integration with Three.js is just one line of code to create a Skarf instance and another line of code to update.
There are videos, live demos, source codes, examples and documentation available. Check out http://cg.skeelogy.com/skarfjs/ for more info.

javascript Rich Text Editors [closed]

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There are several (very good) rich text web editors written in Javascript (eg FCKeditor, YUI Texteditor and many many others).
However I couldn't find any tutorial on how to build such a component. Something that would explain both high-level considerations (architecture) and/or more details in low-level "critical" points (ie why do most of the editors out there use iFrame, how do you handle keyboard input like Ctrl-B, Ctrl-C when the text is selected and when it is not etc)
My main motivation is curiosity; if I had to develop such an editor today I wouldn't know where to start from.
Does anyone know of any tutorial that covers the above issues (ideally, something that explains how to build a wysiwyg editor from scratch)?
After more research I found the following. The functionality for building a rich-text-editor is already implemented at the browser. IE was the first to create such an API and Firefox replicated it.
Overview
The main point is that the javascript object "document" has a property called designMode which can be set to "on". This converts all the page to to a textarea-like component. Imagine that the browser opens the page the same way that MS-Word would: the user can see the formatting but he can also type in the page (normally the browser opens a page as readonly).
window.document.designMode = "On";
Because the above affects all the web page, most editors use iFrames so that the editable area is only the iFrame which has it's own document object.
On top of that, there is an API that allows easy javascript access to styling. This is exposed throw the execCommand() method. For example you can call from Javascript
document.execCommand('bold', false, '');
and the selected text will become bold.
Tutorials
I have found the following:
A brief step by step guide.
A mozilla guide. It has the most convenient API reference I have found and also some more links.
A guide by microsoft.

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