Can’t control mouse wheel zooming with Apple Magic Mouse

[michaelzed]

On openstreetmap.org, mouse-wheel zooming is far too sensitive and impossible to control with an Apple Magic Mouse (whose “wheel” is a touch panel). Using the website is very frustrating.

Specifically, while panning around with mouse click, every mouse-up risks zooming the map randomly in or out. Whether trying to zoom or not, even very small movements risk unintentionally zooming two or three levels at a time. Sometimes a zoom out is immediately followed by an unintentional zoom in, or vice versa. Sometimes I have to attempt a zoom several times in a row, and the repeated and jumpy visual zoom is on the verge of inducing motion sickness.

Is there a way to reduce the mouse-wheel sensitivity for the site? Barring that, is there a way to disable it?

Background info:

• This is the mouse that comes with many Macs.
• There is no software sensitivity control for this mouse’s zoom.
• Scrolling and zooming work very well in most other apps and websites (for example, scroll-zooming in Google Maps is pretty good).

[tomhughes]

The map zooming is just Leaflet's builtin behaviour so any problems are outside our control and should be raised at https://github.com/Leaflet/Leaflet.

[michaelzed]

Found these related bugs, and added a comment to the second one:

Zoom issues with Apple trackpad (Magic Mouse)
Leaflet/Leaflet#2154

Mouse wheel zooms too fast in FF
Leaflet/Leaflet#1794