I need to use InkCanvas in my web application using javascript (angular), is it possible to save InkCanvas as a SVG using javascript (or convert InCanvas to canvas)? i see this, but it seems it works for C#, i need a way to do it in javascript!
I think InkCanvas is only supported in Universal Windows Platform (UWP) for Windows10. This is confirmed in this SO post.
You can use Webassembly to run C# code in web browser using some JS helpers. Here is a post explaining the same.
You can try this with the c# code that you are interested in. Compatibility depended. These are relatively new features and only way to know is to try.
Related
Could you please give me a piece of advice about how to implement CRUD or DB(PouchDB) modifications using FORMs or any other efficient way in Electron?
The point is I would like whole application to behave as desktop tool and it seems to be possible in Electron. However I cannot determine the best way to do this especially if I would like to add to nice eye-candy tricks to make UX as smooth as possible.
First of all electron is not responsible for the visual appearance of your application. It is a framework which wraps your webapp into a desktop application.
That means you need to use standard web technologies (html/js/css) to create your site including 'eye-candy' and animations.
My suggestion is to do a tutorial which explains how to connect electron with a javascript framework like angular. If this is running you can attach a database and all the hot shizzle afterwards.
This tutorial is very good and well explained:
https://scotch.io/tutorials/creating-desktop-applications-with-angularjs-and-github-electron
enjoy!
I have an app for Firefox OS, and I would not like to expose any of the source code, even obfuscated source. Is there currently any means to do this? Is this functionality even planned? Also, this app has ALL functionality implemented in the client, so "move the business logic to the server back-end" does not address this issue.
There is no real solution yet, since every web page exposes the JavaScript source code.
Why not trying obfuscate ?
Since JavaScript is executed on the client side, not only in Firefox OS but every other platform too. The possible options are limited to obfuscating with aforementioned transformations or hiding the application logic in server-side code.
You can read more about app source protection from Mozilla official blog here: https://hacks.mozilla.org/2013/12/protecting-your-firefox-os-app-code/
You could write your application logic in C/C++ and protect it by encryption libraries and convert them into JavaScript using, Mozilla’s Emscripten tool which compiles C and C++ to JavaScript: https://github.com/kripken/emscripten/wiki
You're asking "how do I give someone something, and simultaneously take it away?" You can't. This issue hasn't been solved with JS, and neither with native code.
I've found this nice article about the "injected Way", but the author never finished it :
http://hightechstartups.blogspot.ch/2012/05/different-way-of-developing-browser.html
I would like a bare bone cross browser extension, without any 3rd party extensions or framework (to be as light as possible and not dependant on a 3rd party) that would load Jquery and a JS from a distant server and the ability to load it before or after the page is fully loaded.
I've read a lot of topics about the subject, but since IE10, Chrome 26 and FF20 are out with their new cross-link limitations, i was wondering if somebody had ressources, source code or tutorial about the following requirements :
I need :
Cross browser extension supporting (IE 8+ or 9+ worse case, Chrome
26+, FF20+, Safari)
Ability to inject a single JS hosted on another server. Inserts a script tag that references a javascript file in the head of the HTML
page and then be executed
Not be dependant on a third party extension (greasmonkey) or framework (Kango, Crossrider)
Ability to load before or after the page is fully loaded
This method allows me to customise the browser extension depending on the user's location and it also avoid having updates as the JS is updated on each page refresh.
I'm aware of the downsides, but i would like to achieve this.
I'm aware of cross browser framework like Kango or crossrider, but both don't fit me needs.
The closest example i could find is this How can I run a <script> tag that I just inserted dynamically from a BHO
but it only covers IE and as i got very little Csharp experience, i would like to see a full example to understand it properly and learn from example.
I would LOVE to have a few examples, even if it's not cross-browser (IE being the worst part for me).
Thanks a lot for your support !
Update1:
About Kango and Crossrider, Kango is 2000$ if you want to use IE and for Crossrider you're required to be distributed and monetized by them.
I've managed to code for IE and Chrome, but i was looking for an "elegant" way and figured it was the best place to ask given the level of knowledge of people on this site.
For the installer i currently use NSIS, but i'll test Wix too.
Finally i guess the only way for me would be to learn C++ and .net to get it to work with IE, but if anyone could provide more source code it would be great to test speed and compatibility and discuss here what's the best solution.
Why do Kango or Crossrider not fit your needs? Both frameworks allow you to manipulate the page's DOM (which is what you want):
Kango: Adding content script
Crossrider: documentation, example code
If you want to code your own solution, take a look at the relevant documentation:
Content scripts (Chrome)
The Page mod Jetpack API (Firefox)
Injected scrips (Safari)
Injected scripts (Opera)
Internet Explorer does not natively support extensions. It took me about 80 hours to create a stable and reliable IE extension which supports cross-site AJAX, a (preference) storage method and injection of scripts as early as possible in any frames based on its URL. I developed and tested the extension with Visual Express 2010 on Windows XP and Windows 7, for IE 8-10 (the extension might work on IE6/7, but I decided to not support these ancient and rarely used browsers).
First, I wrote an extension in C# based on LiveReloadIEExtension (a sample IE extension, which in turn is based on this Stack Overflow answer - see also this blog post). It was functional, but it required .NET 4, lacked support of frames, and it's relatively slow.
So, I decided to write an IE extension from scratch in C++. A good starting point is available at http://www.wischik.com/lu/programmer/bho.html: Sample code for C++ BHO, which changes the document's background based on key/mouse events. I've also learned a lot by looking at other code samples on CodeProject, topics on the MSDN forums, questions and answers on Stack Overflow, lots of other blogs, and the MSDN documentation:
DWebBrowserEvents2 interface lists several events which you use to find an appropriate injection point.
Scripting Object Interfaces (MSHTML) lists even more interfaces. You'll be mainly interested in the iHTMLDocument, iHTMLDocument2, ... interfaces.
After creating the IE extension, you want to deploy it of course. I used Wix toolset to create a MSI.
I'd like to start developing Google Chrome extension using node.js (since I've already written a "text-to-song" script in node.js, and I'd like to turn it into a Chrome extension.) What would be the most straightforward way of approaching this problem?
Actually it is. Look at this Developers Live-cast. This is something I've been looking for as well, and this would help you.
This brings your node applications bundled to your browser.
Here is the repo!
EDIT:
I've noticed that this old answer of mine keeps getting upvotes now and then (thank you all).
But nowadays I'm more an advocate of using web apps instead of bundling your application into many platforms like the chrome store or whatever.
You can check the google's post here and here indicating some directions.
In practice I advise for you to start building a progressive web app (PWA) with offline capabilities using service worker and progressive stuff.
There are plenty of resources around the web nowadays and you can offer a much richer application that may achieve a much broader audience if you do it the right way.
Thanks again, and good coding.
Simple answer is NO, unless you can find a way to install node.js with an extension using NPAPI.
Nodejs and a Google Chrome Extension do have a couple things in common i.e they both understand javascript and they both use the v8 javascript engine.
Google Chrome Extension
"Google Chrome Extensions are small software programs that can modify and enhance the functionality of the Chrome browser".
To develop a Google Chrome Extension you should write some javascript and or html/css.
Then you can run the extension in your browser.
If you wish for others to download your extension you will have to provide config.json file that describes you extension sets permissions etc.
Nodejs
"Node.js is a platform built on Google Chrome's JavaScript runtime for easily building fast, scalable network applications".
To develop applications in nodejs you write some javascript and or html/css for web applications.
If wish for others to use you application you start you nodejs server and listen for incoming requests.
Summary
Despite some of the similarities a Google Chrome Extension and Nodejs have nothing to with each other. You cannot use them together in some special way outside of the normal client/server communication.
You can use a WebPack (GitHub) or Browserify (see handbook) to build web-browser extension based on the node.js code.
With Browserify, to convert your code, you can simply run:
browserify node-code.js -o node-code-out.js
Read more:
Browserify vs Webpack.
Build a Chrome Extension with Preact and Webpack (see: Preact Chrome Extension Starter).
I have a small 2D game engine written in C#, using DirectX. Is it possible to somehow run it in a browser as a plugin? Like for example Flash and others, where you go to a site with a game and it will ask you to install a certain plugin and then you can play the game in the browser, with mouse and keyboard input.
I have searched around for hours and I still don't know what I'm looking for. I have so far primarily focused on Internet Explorer, but there are plugins, addons, extensions, etc I don't know what I need really.
Yes I think it is possible.
For example, I have an HTML page which includes an element like this:
<object id="simpleControl1"
classid="http:RenderTextProject5.dll#RenderTextProject.ScrollableControl"
height="300"
width="300">
</object>
The 'classid' attribute value has the following meaning/syntax:
RenderTextProject5.dll is the filename of a compiled .NET assembly
RenderTextProject.ScrollableControl is the qualified name (namespace plus classname) of a class which subclasses System.Windows.Forms.Control
I can then see the control being rendered in the browser.
I'm using IE (IE8, but it used to work with IE6 too), and I have the .NET framework installed on my machine (but I think I needn't have the RenderTextProject5 assembly installed on the client machine).
There may be some other caveats too (e.g. I needed to run in the Intranet security zone).
See Return of the Rich Client: Code Access Security and Distribution Features in .NET Enhance Client-Side Apps.
Look for Silverlight.. It is maybe not exactly what you need but it is a browser plugin capable of running C# code ;)
There is a relatively new plugin called Unity. It is a bit more complex, as it is a dev/3D authoring environment on its own, but uses C# as its language as far as I know. However I don't know if pure 2D programming is possible (well, may be worked around using ortho 3d?).
The basic version is free to download recently, maybe worth a check.
It is possible to run C# applications in a web browser without using plugins. For example, C# applications can be compiled into JavaScript applications using JSIL.