I’ve just installed eM Client, and am considering purchasing it. The biggest issue I’m facing right now, however, is that two-finger scrolling with a Precision Touchpad starts out going backwards, and then corrects itself.
This is most evident in the Settings -> Shortcuts view, but appears to happen everywhere.
Steps to reproduce:
Open up Settings
Go to Shortcuts
Use two fingers to scroll halfway down
Scroll back up
Expected results:
The window should scroll up
Observed results:
The window scrolls down by 13 lines first, before reversing direction and scrolling up. If I scroll slowly, it will scroll down one line at a time until 13 lines have passed before reversing.
This happens regardless of whether I lift my fingers off the trackpad first.
I can see WM_MOUSEWHEEL events going to the window that are correct – the zDelta is negative for scrolling down and positive for scrolling up, so the drivers seem alright at least.
I should note that this happens in places like Settings->Shortcuts, Settings->Translation, and mailbox listings (e.g. scrolling through messages in the inbox), but it does not happen in the message view itself, nor does it happen in Settings->Read or Settings->Compose, both of which require a scrollbar.
So scrolling a long message works fine, but scrolling the list of messages moves backwards for the first few WM_MOUSEWHEEL messages.
I tried this on two other touchpads, a VAIO and a HP/Compaq, and I get the correct response every time. They all use different software for smart gestures. All I can think is that it is specific to your hardware/software/driver setup.
Maybe later when the US comes online, others may have further advice, especially anyone using a touchscreen. Until then, if you have a Pro License you could open a support ticket and get the developers involved.