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osx: scroll delta should take hidpi factor into account

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This commit is contained in:
Paul Rouget 2016-02-02 10:25:26 +01:00
parent 5288b7dfc6
commit 99073eec7b
1 changed files with 5 additions and 2 deletions
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7
src/api/cocoa/mod.rs
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@ -881,10 +881,13 @@ unsafe fn NSEventToEvent(window: &Window, nsevent: id) -> Option<Event> {
},
NSScrollWheel => {
use events::MouseScrollDelta::{LineDelta, PixelDelta};
let scale_factor = window.hidpi_factor();
let delta = if nsevent.hasPreciseScrollingDeltas() == YES {
PixelDelta(nsevent.scrollingDeltaX() as f32, nsevent.scrollingDeltaY() as f32)
PixelDelta(scale_factor * nsevent.scrollingDeltaX() as f32,
scale_factor * nsevent.scrollingDeltaY() as f32)
} else {
LineDelta(nsevent.scrollingDeltaX() as f32, nsevent.scrollingDeltaY() as f32)
LineDelta(scale_factor * nsevent.scrollingDeltaX() as f32,
scale_factor * nsevent.scrollingDeltaY() as f32)
};
Some(MouseWheel(delta))
},