[LV2] Widget-less UI not working
ventosus at airpost.net
Sun May 22 00:59:16 PDT 2016
On 21.05.2016 13:23, Stefan Riha wrote:
> Great thanks, I will take a look at test_show.c next week!
>>Can you give some more information on what you want to accomplish?
> I would like to make a gui in the browser. Don't know if that makes
> sense, it's just an experiment and I want to learn web-stuff like
> websockets etc. Really just a programming exercise...
In a quest of finding the more-most portable UI without any
dependencies, I've already experimented with the very same (websocket +
HTML + JS + JSON) for my moony plugin bundle , feel free to get
inspired. It works quite well, btw.
I've plans to make the web-ui code reusable, but want to migrate things
to JSON-LD  first.
P.s. please reply to the whole list next time, if not, others will miss
part of the conversation.
> On Sat, May 21, 2016 at 5:08 PM, Hanspeter Portner <ventosus at airpost.net
> <mailto:ventosus at airpost.net>> wrote:
> On 21.05.2016 06:23, Stefan Riha wrote:
> > Hi, I'm a beginner and experimenting with lv2.
> > I wrote a simply synth and want a UI without Widget. On the lv2 page it says
> > "There is no requirement that a UI actually be a graphical widget."
> > (from: http://lv2plug.in/ns/extensions/ui/ ).
> True, an UI can theoretically be anything.
> Can you give some more information on what you want to accomplish?
> You may well not need an UI in the first place (but
> don't know yet, as you are a beginner).
> > Below that, there is a list of subclasses of UI, but all are for widgets. So I thought I'd try ui:UI directly instead of
> > ui:GtkUI etc. But neither jalv nor Ardour recognises that there is a UI.
> ui:UI is the parent class which the Widget UIs (ui:GtkUI, ui:Gtk3UI,
> ui:QtUI, ...) derive from. It is en empty shell
> really, hosts cannot possibly know what is inside, you have to give
> the host some more information.
> > So I used ui:GtkUI instead. In jalv, this yields error messages of type Gtk-CRITICAL. Obviously it's because there is no
> > actual widget. In Ardour, I can see that the UI is instantiated() and immediately cleanedup(), probably because the Gtk
> > errors are handled that way.
> If you define the UI as an ui:GtkUI, but do not return a valid
> GtkWidget to the host, sure this raises an error.
> > How do you do this?
> > I looked for hours for some example code but couldn't find one. I stumbled across Ingen which has some form of
> > web-interface (if I understood correctly) and tried to read the .ttl files, but don't understand them.
> You may be looking for ui:showInterface  and ui:idleInterface
> , with those you can build arbitrary
> Here  you can find a dummy plugin I use for testing various UIs
> in my humble host.
> <test_show.c> implements an as-simple-as-it-gets no-widget UI.
>  http://lv2plug.in/ns/extensions/ui/#showInterface
>  http://lv2plug.in/ns/extensions/ui/#idleInterface
>  https://github.com/ventosus/alluis.lv2
> > Thanks a lot for your help,
> > Stefan
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