[LAD] LV2 Oscilloscope

[Paul Davis]

On Thu, Oct 10, 2013 at 2:11 PM, Harry van Haaren <harryhaaren at gmail.com>wrote:

> On Thu, Oct 10, 2013 at 6:29 PM, Aurélien Leblond <blablack at gmail.com>wrote:
>
>> - what is the cleanest way to access input port data from the GUI?
>>
>
> In short: the DSP part should write an Atom event to notify the GUI.
>
> The long: Ardour3 deletes UI instances when the window is closed: that
> means the state of the UI is lost.
> When re-opening the UI, it must re-request the state from the DSP part.
>

The longer.

There are two identical specifications for external-UI. They each have a
different URI.

If a plugin uses one of them (the original) then Ardour will NOT delete the
UI instance when it is closed.
If a plugin uses the other (the version "forked"/"copied" by falktx) then
Ardour WILL delete the UI instance when it is closed.

Both specifications state that the UI is defunct and no longer usable after
being closed:

   * After this callback is called, UI is defunct. Host must call
   * LV2UI_Descriptor::cleanup(). If host wants to make the UI visible
   * again UI must be reinstantiated.


Just wanted to be clear about this F***ING ABSURD situation.

--p
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