Eric,

I'm a confused.

Are you trying to create a desktop application that emulates IUP in a
web browser control?

What I'm after is a HTML IUP driver that uses my desktop UI layout IUP
code but translates it to HTML/CSS/JavaScript text which is sent to the
client browser.

John

On Sun, 2017-01-22 at 23:16 -0800, Eric Wing wrote:
> Hi all,
> 
> This is the initial working backend implementation of IUP for the web
> for Emscripten.
> https://github.com/ewmailing/IupEmscripten
> (switch to the Emscripten branch)
> 
> This pretty much follows the design and architecture I discussed in
> the previous discussions these past few weeks.
> 
> 
> To try out a finished program, here is the built product of my
> Dialog+Button test, I demonstrated in my Mac/iOS/Android video.
> http://playcontrol.net/tempdownload/IUP/IupEmscripten/hello.html
> 
> Emscripten creates a default html layout. It is geared towards games
> and not IUP, so we’ll probably want to make some changes. But don’t
> let the current look distract you too much. The important part is the
> Button towards the left-button of the page. That is my IupButton.
> Click the button and watch it create a new Dialog and Button.
> (Subsequent pages are blank so they don’t have the Emscripten look.
> Don't forget to disable your pop-up blockers if you don't see new
> windows open.)
> 
> To reiterate, this is the same single IUP C program. It has been used
> to build a native Mac app, a native iOS app, a native Android app,
> and
> now a web page that works natively in the web browser.
> 
> 
> 
> For a step-by-step walk through of the core Emscripten fundamentals
> needed to implement this, I put up this repository.
> https://github.com/ewmailing/EmscriptenBasics
> 
> In many respects, it feels a lot like the Android implementation.
> Except rather than calling into Java, it calls into JavaScript. (This
> felt a lot less painful than JNI though, but not without its quirks
> and limitations.)
> 
> 
> So two quick things:
> 
> - Emscripten does indeed suffer from event loop issues, very similar
> to Mac, iOS, and Android. My ENTRY_POINT proposal also solves
> Emscripten.
> 
> - IUP is rare among cross-platform libraries in that it doesn’t use
> explicit annotations to mark the export visibility for public API
> symbols, e.g LUA_API in:
> LUA_API lua_State *lua_open (void);
> 
> Instead Iup is using explicit export files. This has been a small
> annoyance so far for my work on Mac, iOS, and Android. But as far as
> I
> can tell, Emscripten doesn’t support export files and must use
> annotations. (I am unable to build IUP as a library with Emscripten
> right now because of this.)
> 
> So I wanted to bring this up in hopes of encouraging an eventual
> transition to API annotations.
> 
> 
> Finally, now that the architecture is demonstrated as viable, I think
> this would make a good Google Summer of Code project.
> 
> Thanks,
> Eric
> 
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