proper support for tiling WMs [was: zoom to window size]

[ecraven]

i frequently use feh with a tiling window manager. it would be great if there were a switch that automatically zoomed the image to the window size (like with fullscreen, but without actually changing the window size). right now i need to specify the exact geometry to get this to work correctly.

[livibetter]

Use with --auto-zoom --scale-down. First one for full-screen, latter for normal window.

[ecraven]

thanks!
feh -B black -Z --scale-down * works well, except for centering (is that possible?)

[livibetter]

Hmm... interesting, I can't find an option for centering image.

Can you edit the issue title to make this issue for that feature. Not sure if reporter can do that though.

I think there would be needing a discussing about under what case should put image at center. Certainly, if image smaller than the window size, it looks good. If bigger, it doesn't in my opinion.

[derf]

Hmm. For me, there's very little difference between showing the top-left corner (which feh does right now if an image is too large) and centering. I see just two very minor advantages in the current behaviour: the user knows that the top-left is shown, so he only needs to scroll right or down; and it is clear that parts of the image are missing, which might not be clear when centering.

What do you need the centering for? And you might try --zoom max and --zoom fill, perhaps they produce something similar to what you want.

[ecraven]

i would like images zoomed to the window size (as -.Z does) to be shown centered, not left-aligned

[derf]

Ah... that's a bug of feh's tiling mode handling, which is unfortunately extremely messy. I hope I can fix it some time.

[derf]

As of e162228, feh has some kind of tiling window manager support.
Use feh -.Z to have large images scaled down and small images scaled up, in both cases the image will be centered in the window.

Unfortunately there's an awful lot of flickering involved, but I might get that fixed later...

[trapd00r]

Thank you so much! This was a whole lot better. :)

[derf]

The --geometry workaround (no more flickering!) is documented in feh(1). I'm closing this issue now since it probably won't get any better.

[derf]

note to self: it should be possible to detect a tiling window manager by its window change / resize behaviour. (thx timo)