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Fix inverted horizontal scroll on macOS

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In winit the swipe from left to right on touchpad should
generate positive horizontal delta change, however on
macOS it was the other way around without
natural scrolling.

This commit inverses the horizontal scrolling delta
in 'MouseScrollDelta' events to match other platforms.

Fixes #1695.
This commit is contained in:
Michael Kirk
2020-09-06 07:41:19 -07:00
committed by GitHub
parent 658a9a4ea8
commit e2cf2a5754
2 changed files with 3 additions and 1 deletions
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3
src/platform_impl/macos/view.rs
View File

@@ -1003,7 +1003,8 @@ extern "C" fn scroll_wheel(this: &Object, _sel: Sel, event: id) {
let state = &mut *(state_ptr as *mut ViewState);
let delta = {
let (x, y) = (event.scrollingDeltaX(), event.scrollingDeltaY());
// macOS horizontal sign convention is the inverse of winit.
let (x, y) = (event.scrollingDeltaX() * -1.0, event.scrollingDeltaY());
if event.hasPreciseScrollingDeltas() == YES {
let delta = LogicalPosition::new(x, y).to_physical(state.get_scale_factor());
MouseScrollDelta::PixelDelta(delta)