Horizontal scroll is flipped

Is there an existing issue for this?

• I checked and did not find my issue in the already reported ones

Describe the bug

When using the normal/vertical mouse wheel over a slider (or scrolling vertically on a touch pad), the logical (to me) thing happens: scrolling up increases the slider, and scrolling down decreases it. Using the normal/vertical mouse wheel to zoom also does the logical (to me) thing: scroll up zooms in, scroll down zooms out.

However, for horizontal scrolling, the direction is flipped: scrolling left increases sliders, and scrolling right decreases it. That seems backwards. For zooming, it is a little more arbitrary which direction does what, but my intuition also goes the other way around: scrolling left should zoom out, and scrolling right should zoom in, but they do the opposite.

Steps to reproduce

1. Enter darkroom
2. Hover your mouse over a slider, for example: "exposure"
3. (optionally press ctrl+alt if the "mouse wheel scrolls modules side panel by default" is enabled)
4. scroll left

Expected behavior

The value of the slider should decrease

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

darktable.org / GitHub release

darktable version

5.2.1

What OS are you using?

Mac

What is the version of your OS?

macOS 15.6.1 (24G90)

Describe your system

14" M1 MacBook Pro

Are you using OpenCL GPU in darktable?

None

If yes, what is the GPU card and driver?

No response

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

No response

Start in darkroom by reproducing the issue on macOS with horizontal scrolling over the exposure slider, then trace the handling for horizontal wheel input and compare it with vertical scrolling and zooming. Done means scrolling left decreases the slider value, while horizontal zooming follows the expected direction.