Bug 391183

Interesting bug, and thanks for the screen recording, that helped me try to reproduce it.

I'm unable to reproduce with eithe a pinned Task Manager launcher or a Panel launcher using Plasma 5.12.2 and Spectacle 17.12.2 . What versions are you using?

(In reply to Nate Graham from comment #1)
> Interesting bug, and thanks for the screen recording, that helped me try to
> reproduce it.
> 
> I'm unable to reproduce with eithe a pinned Task Manager launcher or a Panel
> launcher using Plasma 5.12.2 and Spectacle 17.12.2 . What versions are you
> using?

Thats interesting because it has always happened to me since when i started using kde months ago as i remember
Im using archlinux with the latest kde, 5.12.2

Are you using a 3rd-party theme? It looks like your context menu fades out over a period of time that isn't long enough to fully disappear before Spectacle captures the screenshot. Does this reproduce for you when using Breeze?

(In reply to Nate Graham from comment #3)
> Are you using a 3rd-party theme? It looks like your context menu fades out
> over a period of time that isn't long enough to fully disappear before
> Spectacle captures the screenshot. Does this reproduce for you when using
> Breeze?

Im only using arc dark as desktop theme, im uploading a new vid

Created attachment 111127 [details]
showing my current desktop theme

Ah, it's the Fade KWin effect, which is independent of your theme.

So the bug here is that with Fade effect on, and Spectacle invoked from its pinned task manager icon's context menu, the menu doesn't fully disappear before Spectacle takes the screenshot.

(In reply to Nate Graham from comment #6)
> Ah, it's the Fade KWin effect, which is independent of your theme.
> 
> So the bug here is that with Fade effect on, and Spectacle invoked from its
> pinned task manager icon's context menu, the menu doesn't fully disappear
> before Spectacle takes the screenshot.

I can confirm disabling the fade effect no longer appears in the screenshot the menu but it still appears the jumping icon, so it is another thing to consider

There's already code in Spectacle to add a slight delay (200msec) when compositing is enabled, allowing enough time for the window to hide itself. I'm not sure how we could increase this accurately to account for various KWin effects. I get a similar "ghost" effect when launching Spectacle and using KWin's "Glide" effect. Since KWin behavior scripts can be written by anyone and freely shared, there's an infinite number of potential delays and transition effects possible.

As for the bouncing icon, that's part of Plasma's "Application Launch Feedback" effects. I believe it bounces until the application window appears.

(I attempted to turn this off as well, but there appears to be a bug where the setting does not save. I filed that as Bug 392050.)

I don't know how this could be handled effectively. We shouldn't expect users to disable all their graphical effects to take effective screenshots, but I can't see how we'd enable a large enough delay without affecting Spectacle's (perceived) performance.

Ideally there would be a way to get a signal from KWin once all animations finished. We really should not add even more timeout hacks.

No more timing hacks! Couldn't agree more. I've already been the victim of at least one.

KWin strikes me as a place where mere mortals dare not tread, but I'll have a quick look to see if any usable signals are already being emitted.

Same issue (or at least the same root cause) as Bug 376865. Since it captures a screenshot immediately, the capture includes any in-progress or half-finished animations triggered by launching the app.

*** This bug has been marked as a duplicate of bug 376865 ***