[LAD] How can an LV2 plugin UI get the value of a control port from the plugin?

Philippe Coatmeur philcm at gnu.org
Fri Oct 17 19:51:33 UTC 2014

On 17/10/14 15:56, Harry van Haaren wrote:
> On Fri, Oct 17, 2014 at 1:30 PM, Phil CM <philcm at gnu.org 
> <mailto:philcm at gnu.org>> wrote:
>     Also each time the UI is opened, the widgets are reset at maximum
>     (not the values).
> Hi Phil,
> Glad to see you're excited and working hard on learning LV2! Checkout 
> the example plugins: they show how things work.
> In the UI, there is a  port_event()  function. It tells the UI what 
> port changed, and what its current value is. Use this to do 
> widget->setValue( newValue ); and you're done ;)

No matter what I try, I always end up with a error: ‘class Widget’ has 
no member named ‘setValue’. But I declare Widget quite exactly how you 
do BittaWidget, I require the same files, I don't know *where is your 
setValue member declared*..?
Also, in your example you are really doing


(But I dont seem to have a "value" method either).

> Eg (from OpenAV's ArtyFX, Bitta plugin)
> https://github.com/harryhaaren/openAV-ArtyFX/blob/master/bitta/gui/ui.cxx#L131
>     How can I /get/ the control ports values from the UI perspective?
> In answer to your Q, how to "get", you don't: you're told when there's 
> a new value.
> HTH, Cheers, -Harry
> -- 
> http://www.openavproductions.com
> _______________________________________________
> Linux-audio-dev mailing list
> Linux-audio-dev at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-dev

Philippe "xaccrocheur" Coatmeur
http://bitbucket.org/xaccrocheur  /https://github.com/xaccrocheur

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxaudio.org/pipermail/linux-audio-dev/attachments/20141017/0c591818/attachment.html>

More information about the Linux-audio-dev mailing list