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Implement proper grabbing behavior on macOS #1093

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Implement proper grabbing behavior on macOS#1093
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D - averageLikely as difficult as most tasks hereDS - appkitAffects the AppKit/macOS backendH - good first issueIdeal for new contributorsP - normalGreat to haveS - platform parityUnintended platform differences
@Osspial

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@Osspial
Osspial
opened on Aug 5, 2019

Right now on macOS, the cursor just gets locked to its current location, instead of getting locked to the area of the window. A proper solution that locks the cursor to the window exists and is documented, but hasn't been implemented yet.

See this comment:

winit/src/platform_impl/macos/window.rs

Lines 519 to 523 in 2442305

pub fn set_cursor_grab(&self, grab: bool) -> Result<(), ExternalError> {
// TODO: Do this for real https://stackoverflow.com/a/40922095/5435443
CGDisplay::associate_mouse_and_mouse_cursor_position(!grab)
.map_err(|status| ExternalError::Os(os_error!(OsError::CGError(status))))
}

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    D - averageLikely as difficult as most tasks hereDS - appkitAffects the AppKit/macOS backendH - good first issueIdeal for new contributorsP - normalGreat to haveS - platform parityUnintended platform differences

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