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Stop scaling up small scroll wheel events #16753

merged 1 commit into from Feb 16, 2018


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billyjanitsch commented Feb 15, 2018

Description of the Change

As discussed in #16743, this reverts #15487.

#15487 essentially compensated for the fact that wheelDelta was switched to delta in the 1.19 editor rewrite, reducing the scroll sensitivity by 1/3. Now that it's been switched back in 1.24, #15487 is no longer necessary, and in fact it stops the trackpad from distinguishing between different small velocities.

Per #16743, it would actually be best to move back to delta eventually, but only when the interaction with scroll sensitivity is properly figured out, such that #15487 isn't necessary either way.

cc @Ben3eeE @50Wliu @nathansobo


This makes scrolling at low velocities feel slightly more natural on a macOS trackpad.

Possible Drawbacks

This should be safe because it only affects small scroll deltas which are only generated by trackpads.

Verification Process

Opened an editor window, pasted a large block of text, then scrolled around slowly using a macOS trackpad at different scroll sensitivities.

Applicable Issues

See #16743 and #15567.

@nathansobo nathansobo merged commit e334f04 into atom:master Feb 16, 2018

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nathansobo commented Feb 16, 2018

I'm really hoping this doesn't have unintended consequences, but I think your thought process is reasonable.

@billyjanitsch billyjanitsch deleted the billyjanitsch:revert-15487 branch Feb 16, 2018


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50Wliu commented Feb 18, 2018

@nathansobo do you think this should be hotfixed?

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