Re: Mouse wheel events apparently not working in canvas on macOS with Tk 9.0.1

Hi Eric,
the MouseWheel stuff had multiple changes with 9.0:
- unification over platforms: https://core.tcl-lang.org/tips/doc/trunk/tip/474.md
- the widget below the mouse receives it, not the focus widget.
- two-finger scroll does not generate mousewheel: https://core.tcl-lang.org/tips/doc/trunk/tip/684.md
If you find any news, please consider to contribute to the
https://core.tcl-lang.org/tk/wiki?name=Migrating+scripts+to+Tk+9&p
I have no MacOS, but maybe, this is helpful.
If anything does not work after those hints, consider to file a bug report, as many core-close people dont look here.
Take care,
Harald
Am 17.02.2025 um 10:04 schrieb Eric Brunel:

Hello all,
 I'm seeing a weird issue with tcl/tk 9.0.1 on macOS: if I create a canvas
and bind mouse wheel events on it, it doesn't seem to receive them. Here
is a tiny script showing the problem:
 canvas .cnv
pack .cnv -fill both -expand yes
bind .cnv <MouseWheel> { puts "." }
 If I run that with tcl/tk 8.6.16 compiled from source on my mac mini (M1
chip, macOS Ventura 13.2.1), it works as expected, the mouse wheel events
are received and the "." are printed. If I do the same with tcl/tk 9.0.1,
again compiled from source on the same machine, it doesn't work: no "." is
printed.
 I tried with tcl/tk 9.0.1 also compiled from the source code on Windows
and even Linux, and the same script works as expected: the mouse wheel
events are received and the "." are printed. The only platform where it
doesn't work is macOS.
 This looks like quite a big problem, so I'd be surprised if it had been
missed. Can anyone confirm what I'm seeing here? Is there an issue with my
installation?
 Thanks!