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Ladybird/AppKit: Invert the horizontal delta scroll value

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This matches the negation of the vertical scroll delta value. This makes
the scroll events behave as follows on macOS:

Natural scrolling enabled:
* Scrolling up on the trackpad scrolls down on the page.
* Scrolling right on the trackpad scrolls left on the page.

Natural scrolling disabled:
* Scrolling up on the trackpad scrolls up on the page.
* Scrolling right on the trackpad scrolls right on the page.
This commit is contained in:
Timothy Flynn 2023-11-24 08:19:59 -05:00 committed by Tim Flynn
parent 754ecc56dd
commit fb1845f294
Notes: sideshowbarker 2024-07-17 07:14:09 +09:00 
Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/fb1845f294
Pull-request: https://github.com/SerenityOS/serenity/pull/22042
Issue: https://github.com/SerenityOS/serenity/issues/21749
1 changed files with 1 additions and 1 deletions
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Ladybird/AppKit/UI/LadybirdWebView.mm
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@ -1099,7 +1099,7 @@ static void copy_data_to_clipboard(StringView data, NSPasteboardType pasteboard_
- (void)scrollWheel:(NSEvent*)event
{
auto [position, screen_position, button, modifiers] = Ladybird::ns_event_to_mouse_event(event, self, GUI::MouseButton::Middle);
CGFloat delta_x = [event scrollingDeltaX];
CGFloat delta_x = -[event scrollingDeltaX];
CGFloat delta_y = -[event scrollingDeltaY];
if (![event hasPreciseScrollingDeltas]) {
delta_x *= [self scrollView].horizontalLineScroll;