[LAD] [ANN] IR: LV2 Convolution Reverb

[David Robillard]

On Tue, 2011-02-22 at 12:43 +0000, Fons Adriaensen wrote:
> On Mon, Feb 21, 2011 at 09:26:09PM -0500, David Robillard wrote:
>  
> > It is obviously not useful to have hundreds of plugin UI windows open at
> > once anyway.
> 
> Unless they are embedded instead of being separate top level windows.
>  
> > If you're on an X11 system, then you can use X11 as a base to support
> > several toolkits in exactly the way you described (if those toolkits use
> > X11, of course). The experiment you described is an implementation
> > strategy, and possibly one we should use in the aforementioned library
> > to avoid the out-of-process overhead. The source code would be useful.
> 
> 
> > However, there is no need or even benefit to forcing UI and/or host
> > authors to deal with X11 directly. That is simply a poor API design, and
> > a nuisance for everyone.
> 
> I think you misunderstood things a bit. Neither the host nor the plugin
> has to deal with X11 directly, each of them uses whatever toolkit they
> like. The essential point is that what is exchanged (once) between
> them is something that is common to both - an X window ID in the case
> of X11 systems or the equivalent if the basic system is not X. The
> plugin uses this as the  parent for its own window. Which means that
> the plugin window's position, visibility, etc. are now under control
> of the host. 
> 
> The code needed to do this can be part of a plugin support library on
> both sides. 

Bingo. You said yourself, "or the equivalent if the basic system is not
X". In other words, the UI API should not be X11 based. In other other
words, the UI API needs to be toolkit agnostic, which it is. Yay.

I fully agree with everything you have said here, otherwise.

-dr