Bagaimana menerima klik mouse untuk satu bagian dan membiarkan klik di seluruh NSWindow

Saya memiliki kode di bawah ini untuk subkelas NSWindow, ada tampilan animasi yang dapat diskalakan dan saya ingin menerima klik ketika diklik di tempat yang tepat dan menolak (klik) jika di luar.

Kode di bawah ini berfungsi dengan baik kecuali jendelanya tidak membiarkan klik masuk.

- (void)mouseDragged:(NSEvent *)theEvent {
  if (allowDrag) {
    NSRect screenVisibleFrame = [[NSScreen mainScreen] visibleFrame];
    NSRect windowFrame = [self frame];
    NSPoint newOrigin = windowFrame.origin;

    // Get the mouse location in window coordinates.
    NSPoint currentLocation = [theEvent locationInWindow];
    // Update the origin with the difference between the new mouse location and the old mouse location.
    newOrigin.x += (currentLocation.x - initialMouseLocation.x);
    newOrigin.y += (currentLocation.y - initialMouseLocation.y);

    if ((newOrigin.y + windowFrame.size.height) > (screenVisibleFrame.origin.y + screenVisibleFrame.size.height)) {
        newOrigin.y = screenVisibleFrame.origin.y + (screenVisibleFrame.size.height - windowFrame.size.height);
    }

    // Move the window to the new location
    [self setFrameOrigin:newOrigin];
  }
}



- (void)mouseDown:(NSEvent *)theEvent
{
    screenResolution = [[NSScreen mainScreen] frame];

   initialMouseLocation = [theEvent locationInWindow];

    float scale = [[NSUserDefaults standardUserDefaults] floatForKey:@"widgetScale"]/100;

    float pX = initialMouseLocation.x;
    float pY = initialMouseLocation.y;
    float fX = self.frame.size.width;
    float fY = self.frame.size.height;

    if (pX>(fX-fX*scale)/2 && pX<(fX+fX*scale)/2 && pY>(fY+fY*scale)/2) {
        allowDrag = YES;
    } else {
        allowDrag = NO;
    }
}