SwiftUI Buttons on Inactive NSWindow by Default Handle Mouse Events Instead of the Window

NSView overrides the acceptsFirstMouse (opens new window) method, always returning true. In SwiftUI views, overlay this overridden View.

import SwiftUI
import Cocoa

// Just mouse accepter
class MyViewView : NSView {
    override func acceptsFirstMouse(for event: NSEvent?) -> Bool {
        return true
    }
}

// Representable wrapper (bridge to SwiftUI)
struct AcceptingFirstMouse : NSViewRepresentable {
    func makeNSView(context: NSViewRepresentableContext<AcceptingFirstMouse>) -> MyViewView {
        return MyViewView()
    }

    func updateNSView(_ nsView: MyViewView, context: NSViewRepresentableContext<AcceptingFirstMouse>) {
        nsView.setNeedsDisplay(nsView.bounds)
    }

    typealias NSViewType = MyViewView
}

// Usage (somewhere in your SwiftUI view stack)
Text("Click me")
  .padding(20)
  .background(Color.yellow)
  .overlay(AcceptingFirstMouse()) // must be on top (no confuse, it is transparent)
  .onTapGesture {
      print("Label tapped")
  }

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Author: Sintone Li

Article link: https://cleanclip.cc/gb/developer/swiftui-nswindow-inactive-firstmouse/