Scrolling the pictures

Bertrand_Roessli · May 7, 2020, 5:44pm

Hello,

When I scroll the pictures using 2 fingers on the pad, it is VERY quick, in
fact too quick to my taste.
Is there a way to slow it down? I searched through the preferences but could
not find any option that would do that.

Thank You,
B. Roessli

agriggio · May 13, 2020, 7:25am

Hi, welcome!, and sorry for the late reply
I must admit I never use a touchpad, so I haven’t noticed any issues. However, I remember something similar was affecting rawtherapee at some point, and iirc it got fixed. I’ll see if that can be ported to art as well.
Best

Thanatomanic · May 13, 2020, 8:50am

Hi Alberto, I don’t think it was ever really fixed… Thumbnail scrolling speed under linux too fine. · Issue #4663 · Beep6581/RawTherapee · GitHub

agriggio · May 13, 2020, 8:56am

Thanks for the pointer. I had this in mind:

github.com/Beep6581/RawTherapee

Smooth scrolling improvements

Beep6581:dev ← Entropy512:smooth_scroll

opened 09:41PM - 29 Aug 19 UTC

Entropy512

+24 -10

The thumbnail browser (thumbbrowser.cc), right-side panels (guiutils.cc), and ed…itor zooming (cropwindow.cc) all had discretized scroll behaviors that quantized GDK_SMOOTH_SCROLL events up to +/- 1.0, greatly amplifying the response to some smooth scrolling events (most notably touchpad scroll gestures) This patchset: Allows the thumb browser and right-side panels to scroll more smoothly, proportionally to the scroll event delta Accumulates smooth scroll deltas when zooming the editor to prevent high-frequency small-delta events from rapidly traversing between minimum and maximum zoom Smooth scrolling without delta accumulation in the zoom window would be an ideal goal but would also require a major rewrite of most of the cropwindow.cc zooming mechanisms in order to not use discretized zoom steps. This fixes the most egregious issues raised in issue #5426 - implementing the requested swipe right/left in editor to move to prev/next photo will require additional work, and there are GUI design considerations to be made since this might break behavior for some existing users who rely on left/right smooth scrolling being treated identically to up/down by the zoom scrolling code.

but maybe the issue is different here? As I wrote, I never use the touchpad so I’m not really sure I know what is going on…

jllailes · May 13, 2020, 11:24am

hello @agriggio. in fact the speed of the scrolling by swiping with the touchpad is not configurable and is very fast

my swip is very light on my touchpad…

Bertrand_Roessli · May 13, 2020, 11:32am

Hello
Thanks for the reply.
With Rawtherapee the speed of the scrolling is ok for me on my laptop and much
slower than in ART.

agriggio · May 13, 2020, 2:38pm

I ported the code from RT, it should work better now.

jllailes · May 13, 2020, 2:46pm

Yes, it’s working perfectly now.
Thank you very much @agriggio

Bertrand_Roessli · May 13, 2020, 7:06pm

Yes now it is perfectly fine.
Thanks a lot !

jllailes · May 15, 2020, 2:15pm

Not only the scrolling of the images is much better, but also the zoom management with the touchpad is really improved. And maybe it’s this second point that is even more important for me !