Re: [LAD] How can an LV2 plugin UI get the value of a control port from the plugin? - Linux-audio-dev

17 Oct 2014

On 17/10/14 15:56, Harry van Haaren wrote:
...
  On Fri, Oct 17, 2014 at 1:30 PM, Phil CM
&lt;philcm(a)gnu.org 
 <mailto:philcm@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

self->widget->graph->value(value);

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

-Phil
...

 Eg (from OpenAV's ArtyFX, Bitta plugin)
 https://github.com/harryhaaren/openAV-ArtyFX/blob/master/bitta/gui/ui.cxx#L…

     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

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