On 2026-08-12 5:30 PM, Hermann Meyer wrote:
Am 11.08.26 um 14:10 schrieb Fons Adriaensen:Hello all, Some more questions on my way to grok LV2 1. Should hosts echo parameter changes to the GUI if the change came from the GUI ? Jalv doesn't, Ardour does. That can make continuous changes (e.g. a fader) look erratic as the echo will probably arrive when the widget has already moved to the a new value.You should at least be prepared for such a behave and break the loop on your side.Remember, the host is the house keeper and the plug is the guest.
The reason for this is that the parameter may be automated. Active automation overrides user manual control, unless the automation mode is "Touch" and the plugin sends a touch event for the given control
3. A GUI may want to show an optional second window
Don't do that. This is frowned upon and causes problems on systems without z-axis positioning API for windows.
The only system with a z-axis window stacking API specifically mentions that plugins SHOULD NOT open additional windows in their human interface guidelines.
-- robin
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