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

Harry van Haaren harryhaaren at gmail.com
Fri Oct 17 14:56:41 UTC 2014

On Fri, Oct 17, 2014 at 1:30 PM, Phil CM <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 ;)

Eg (from OpenAV's ArtyFX, Bitta plugin)

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


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