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Fix focusing a screen when the screen has no windows. #749

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Fix focusing a screen when the screen has no windows. #749

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16 changes: 14 additions & 2 deletions Amethyst/Categories/NSScreen+Amethyst.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -36,9 +36,21 @@ extension NSScreen {
return String(managedDisplay.takeRetainedValue())
}

/// Returns the screen's frame translated to Quartz' coordinate system: The screen's frame (and bounds and so on)
/// are in cocoa coordinates which are used for views. This coordinate space differs from from Quartz coordinate
/// space which is used for events.
/// See https://stackoverflow.com/a/19887161 for details.
func cgRect() -> CGRect {
guard let primaryScreen = NSScreen.screens.first else {
return CGRect(origin: frame.origin, size: frame.size)
}
return CGRect(x: frame.origin.x, y: primaryScreen.frame.maxY - self.frame.maxY,
width: frame.width, height: frame.height)
}

func focusScreen() {
let screenFrame = self.frame
let mouseCursorPoint = NSPoint(x: screenFrame.midX, y: screenFrame.midY)
let frame = cgRect()
let mouseCursorPoint = CGPoint(x: frame.midX, y: frame.midY)
let mouseMoveEvent = CGEvent(mouseEventSource: nil, mouseType: .mouseMoved, mouseCursorPosition: mouseCursorPoint, mouseButton: .left)
mouseMoveEvent?.flags = CGEventFlags(rawValue: 0)
mouseMoveEvent?.post(tap: .cghidEventTap)
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