Weird behavior of JSFX when Reaper re-gains Focus

[mschnell]

Also see -> https://forum.cockos.com/showthread.php?t=261849 and -> https://forum.cockos.com/showthread.php?t=262165 for details regarding the plugin in Question (ReaPack-> Midi Fade X).

I suggest that this is not desired behavior. A potential bug introduced maybe a year ago, as it did not happen when I created the plugin (2018) nor when I tested with an older version of Reaper's.

Testing on Windows 10.

With the current version I found that a critical variable in the plugin (but seemingly not all other variables) is set to zero when Reaper regains the focus.

Moreover when Reaper regains the focus the @slider section is executed (exploiting this I could do a workaround in this JSFX).

I suppose both variable cleaning and @slider should not happen at that moment. Maybe at some point in time an optimization has been introduced to have the JSFXes redraw their GUI after re-focussing, and this is an involuntary side-effect.

Moreover I found that (other than with the old version of Reaper's), after loading the plugin the same happens (seemingly additionally to doing the correct first time @slider) and hence Midi Fade X does not work as expecting after loading the project.

-Michael

[mschnell]

Anybody care to comment ?

-Michael

[Justin]

Can you simplify this report by providing a simple JSFX which demonstrates the issue, and also tell us what release version the behavior changed?

[mschnell]

ReaPack-> Midi Fade X shows the problem clearly. I'll try to come up with something more simple.

But certainly I'm not going to find the exact version where it changed.

Am I correct to assume that it is not desired behavior that variables are set to zero and @slider is run when Reaper re-gains the focus ? If that is desired, I can happily live with that (I easily did a workaround in Fade X).

-Michael

[Tale]

Isn't the option "Close audio device when stopped and application is inactive" under Options > Audio the reason for this behavior? Here JSFX no longer stops/resets when REAPER looses/regains focus.

[mschnell]

That certainly would avoid the problem from showing.

But (1) IMHO it's unexpected / undesired behavior nonetheless and (2) the problem also shows when the plugin is loaded: the at some point after the initialization the variable gets reset to zero.
-Michael

[mschnell]

This JSFX shows that the variable is reset and @slider is run when Reaper re-gains the focus (which both does not seem to make sens to me).

@init seems to be run at that point, as well ?!?!?

It did not reproduce other aspects I mentions (that it does not happen when the project once was in in run state, and that something weird happens when the JSFX is loaded (e.g. by starting Reaper) (which does happen with Midi Fade X) ).

I'm going to check with an older version of Reapers...

Seems I can't reproduce that (less weird) behavior with the version I supposedly tested with some days ago right now any more - even with Fade X.

-Michael

desc:refocus test

slider1:set1=0<0,1,1>set to 1


@init
//a = 1;

@slider
set1 ? (
  a = 1;
);  

@sample

a != 0 ? (
  a +=1;
);  

@gfx 640 400

gfx_r=gfx_g=gfx_b=0; gfx_a=1;
gfx_x=gfx_y=0;
gfx_rectto(gfx_w,gfx_h);
gfx_x=gfx_y=10;
gfx_r=gfx_g=gfx_b=1;
gfx_printf("%d", (a/10000)|0);

[mschnell]

I am still eager to know if it's planned behavior that JSFXes do a kind of reset when Reaper re-gains the focus. If yes, I'll update Fade X on ReaPack, if no, I'll wait for a fix in Reaper and re-test.
Thanks,

-Michael