About the GUI:
I think you might be mistaken. Even though I'm new to
template stuff in C++, my syntax seems to be correct. The GUI appears
when I open the plug-in in zynjacku (lv2_jack_host does not care about
GUIs).
What runtime error did you encounter and what host did you use?
I tried it in Ingen. With your code, when I double click plugin (to show
GUI) it reports "Failed to instantiate Plugin UI" and Ingen GUI freezes
(although, engine still runs in background).
That's interesting. Unfortunately, I couldn't get Ingen to compile on
my machine (running Arch), so I cannot test this at the moment. But I
will look out for it and compare with other LV2 GUIs. I actually
copied the code from the example in the GUI header file (forgot its
name, will check at home).
Any chance that this is a bug in Ingen? (It shouldn't crash, but I
know I'm being a little bold to pass on the origin of the crash from
my untested whacky haphazard code to a well-tested program which is
used by many more people...)
I'm pretty new to templating too and, even though
your code made some sense,
I was comparing it to another very simple example of LV2 GUI code (just a
button too but without MIDI support), and only difference in code (and in
crashing Ingen :)) was that line.
Thanks for your input. I hope I can get Ingen compiled and see for
myself where the problem lies.
Rekado