About QMovie : play gif animation only once

[Petross404_Petros S]

@mrjj If someone wants to propose something for the Documentation, he/she must report at https://bugreports.qt.io/ or there is nothing that can be done?

[mrjj]

@Petross404_Petros-S
That would be the correct place as it also accepts feature requests and
documents updates.

[Petross404_Petros S]

@mrjj Great, thanks!

[mrjj]

@Petross404_Petros-S
Btw, i assumed you need to use various GIFs you cant know before hand
as else i would just have suggested to open the GIF in online editor and set loop count to 1
and it would only play once.

[Petross404_Petros S]

@mrjj

i would just have suggested to open the GIF in online editor and set loop count to 1

I had done exactly that at https://ezgif.com/, before JKSH wrote the post about frameChanged :)

I find it a cleaner solution to control the loop with the Qt API (even with bloated -if that's the word- code), rather that duck the issue with external tools. It's just me, it might be better to do this without all that trouble.

[mrjj]

@Petross404_Petros-S
Hehe funny enough thats the site i would have suggested :)
Yeah fixing it with code is better than fixing one file.
Then if GIF changes it still works.

[Petross404_Petros S]

@mrjj You wrote exactly what I was thinking but couldn't express. Anyway, I am writing a bug report, I hope for the best.

[JKSH]

@Petross404_Petros-S said in About QMovie : play gif animation only once:

*frameCount returns 20 for the specific gif file, but for some reason I must stop at frame #19.

If frameCount() == 20, then currentFrameNumber() ranges from 0 to 19. It's like an array: If an array has 20 elements, then its last valid index is 19.

Nonetheless, even if you used == movie->frameCount(), I'd expect your movie to just loop forever instead of crash. Check your stack trace; there might be other issues in your application.

** What boggled my mind is that QMovie::stop() doesn't emit finished as I expected from the description in Detailed Description.

This sounds like a bug. I verified (with Qt 5.10.0 MSVC 2015 x86) that it does emit stateChanged(QMovie::NotRunning) but doesn't emit finished(). Could you please file a separate bug report for this?

Please post the links to both reports (documentation and missing finished() signal) here, thanks!

[Petross404_Petros S]

@JKSH Sure I will. I didn't know that not emitting finished is a bug (although I suspected it) and I mentioned it in the documentation bug report too. I will report the missing signal tomorrow morning.

Also, the whole frameCount - 1 thing reminded me the arrays and now you confirmed it. I will retry to crash it and see what you are talking about. Thank you all for the support. :)

[Petross404_Petros S]

Good morning (or whatever in your local time zone is), here is the bug report for the missing signal.