KOReader: Please Help Me Find The Code Associated With This Wonderful Animation

[Maimun Ahmed]

Hi wonderful guys over mobileread, I recently started tinkering the source code of KOReader on my machine and I came accross this beautiful loading animation (I really like the animation of the three dots at the bottom of the screen.)

Is anyone aware which script of KOReader's source code is triggering this. I captured that animation while running KOReader on android. The gif is attached below:

[pazos]

That's a standard android dialog without a frame.

It is in https://github.com/koreader/android-...s.kt#L160-L187

Used while uncompressing APK assets in device's storage. You should see the dots animation once per version.

You can't repurpose the dialog for anything non-android.

[Maimun Ahmed]

Originally Posted by pazos

That's a standard android dialog without a frame.

It is in https://github.com/koreader/android-...s.kt#L160-L187

Used while uncompressing APK assets in device's storage. You should see the dots animation once per version.

You can't repurpose the dialog for anything non-android.

Thank you pazos for the answer. The code seems to be a kotlin script. I just wished to create a similar animation using lua that can be embedded in KOReader's source code (like the standard progress bar in frontend/ui/widget.

[pazos]

Originally Posted by Maimun Ahmed

Thank you pazos for the answer. The code seems to be a kotlin script. I just wished to create a similar animation using lua that can be embedded in KOReader's source code (like the standard progress bar in frontend/ui/widget.

Hi, if this is something you want for yourself, even without a real purpose, I think you can build something quickly using the emulator. We ship a widget test utility in https://github.com/koreader/koreader...s/wbuilder.lua, so you can play with your widget without launching a full blown KOReader instance.

If you want to build something that does some background job while displaying the animation that's harder.

A lua state/vm is mostly single threaded. The best you can do is some sort of cooperative multitasking, in the form of lua coroutines

[Maimun Ahmed]

Originally Posted by pazos

Hi, if this is something you want for yourself, even without a real purpose, I think you can build something quickly using the emulator. We ship a widget test utility in https://github.com/koreader/koreader...s/wbuilder.lua, so you can play with your widget without launching a full blown KOReader instance.

If you want to build something that does some background job while displaying the animation that's harder.

A lua state/vm is mostly single threaded. The best you can do is some sort of cooperative multitasking, in the form of lua coroutines

Maybe I am wrong but then, how is the read timer counting down in the background while we continue to use the ui.

[pazos]

Originally Posted by Maimun Ahmed

Maybe I am wrong but then, how is the read timer counting down in the background while we continue to use the ui.

Yes, you're totally wrong here.

You're confusing the hability to schedule tasks to run in the future with multithreading. They are not the same.

Any tasks scheduled with any of the UIManager facilities (see doc in https://koreader.rocks/doc/modules/ui.uimanager.html) will be executed sequentially on the UIThread, so if one of such tasks takes hours to complete the UI will be blocked for that time too.

[Maimun Ahmed]

Originally Posted by pazos

Yes, you're totally wrong here.

You're confusing the hability to schedule tasks to run in the future with multithreading. They are not the same.

Any tasks scheduled with any of the UIManager facilities (see doc in https://koreader.rocks/doc/modules/ui.uimanager.html) will be executed sequentially on the UIThread, so if one of such tasks takes hours to complete the UI will be blocked for that time too.

Thanks for correcting me. I didn't go deep through the docs at first. But after reading through it, I was able to understand everything very clearly. Thanks for your time and attaching the link to docs.