back keyboard shortcut not working [solved]

[Duns]

I noticed that, in paged mode, I can't go back (just) one page, but only two or more page (before), either with page-up key, or left-arrow or previous-page icon.
Right-arrow (and next page icon) is ok, it works like the page-down key, as expected.

Linux KDE Neon, with the latest Calibre release, Italian keyboard (but the problem is the mouse as well, so I don't think the problem is keyboard)

[Kovid Goyal (kovid)]

Works for me. Make sure you have the arrow keys bound to the "Scroll
right" and "Scroll left" action in the viewer preferences.

 status invalid

[Kovid Goyal (kovid)]

As for mouse scrolling its behavior is controlled in the scrolling
behavior section of the viewer preferences.

[Duns (jduns)]

Sorry, but I can't solve: when I press back, I go two pages before, even with the icon (previous page).

[Kovid Goyal (kovid)]

That is what the page turn buttons are supposed to do. If you want to
turn a single column use the arrow keys or configure the mouse
accordingly.

[Duns (jduns)]

I see. How should I do?

[Duns (jduns)]

If I use left-arrow only to "scroll left", I go always left *two* pages, and not only one.

[Kovid Goyal (kovid)]

I cannot reproduce that, sorry.

[Duns (jduns)]

This is a strange behavior I noticed in at least three different PC with KDE Neon (and different keyboard/mouse hardware).
Furthermore, to be honest I don't understand why the default behavior of a back command should be (unlike the forward one) go back *two* pages instead of one.
So the only way to go back one page is 1) to go back two pages, and 2) then go forward one: a bit complicated, I think...

[Kovid Goyal (kovid)]

The default action of the left arrow key goes back one column at a time,
not two.

[Duns (jduns)]

Not on my (three different) KDE Neon PC, though.
Couldn't you yourself try with a KDE Neon (virtualbox) installation?
I think that 1) if you can say what I should do to get a correct behavior this is not a bug, but 2) if you can't say that, this is a bug.
Calibre is an excellent program, and I thank you for your precious work and I appreciate very much the new interesting improvements you made. But if I can't easily go back one column a time, this in my opinion is a problem. To solve. Without hurrying, of course.
Thank you!

[Kovid Goyal (kovid)]

Works fine for me on KDE as well. I dont see what earthly difference the
desktop environment would make. Simply make sure the left arrow key is
set to the scroll left action in the viewer keyboard shortcuts
preferences.

[Duns (jduns)]

You can see yourself: even after restoring shortcuts to default, with the icons, go forward works correctly, but go back doesn't work as expected (it go two pages before).
And arrow-left, even after restoring shortcuts to default, go *two* pages before (I cannot record my hands, but I say the truth).
Maybe is a problem of Italian keyboard?

[Kovid Goyal (kovid)]

We appear to be talking at cross purposes. I am talking about when you
display two page at once in the viewer. You appear to be talking about
scrolling behavior with a single page displayed. And looking at your
viewer it looks like you have customized a wholebunch of thigs, this
isprobably caused by that. Restore everything to defaults (delete
viewer-webengine.json in the calibre config directory) and then see if
you can figure out what is causing it, by restoring your settings one by
one.

[Duns (jduns)]

Excellent! Following you instructions, I found where was the problem: in left and right margin 0 in page payout.
Setting left and right margins as 1 has solved the problem!
Thank you very much!

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased