How to implement tihs patch

[santisis]

Hi! A KOReader newbie here!

I have a solid background on programming but zero expertise with Lua an KOReader.

I'm trying to create a header attached to the visibility of the Status bar. So, when you press the Status bar to toggle (or cycle) the visibility the header visibility changes as the Status bar changes. It's sort of a Alt status bar, but attached to Status bar visibility.

I have now a working version of that patch but it's dirty. My approach was:

1. I have started with u/joshua-cant patch for custom header/footer. That patch wraps ReaderView.paintTo and write the additional info on the page margins.
2. (Remember, I don't have Lua knowledge) I haven't found a way to access the footer_visible member of ReaderFooter, so I've touched frontend/apps/reader/modules/readerfooter.lua to add a static function that returns that state. With that "fix" I know if my header has to be drawn.
3. That worked, but my bar doesn't redraw automatically, so I have to refresh manually. Then I modified the onReaderFooterVisibilityChange event handler at frontend/apps/reader/modules/readerview.lua to force the redraw even when the Footer is not reclaiming space.

That works, but I know that isn't a clean solution.

My questions are:

• There's a better method to wrap than ReaderView.paintTo, maybe a ReaderFooter method?
• There's a clean way to check the ReaderFooter.footer_visible than having a static method? (I haven't said it, but the ReaderFooterVisibilityChange event doesn't share if the Status bar is visible or not, only that the visibility has changed)

Thanks in advance!