From 9f0cde3d6960e11c43262194cd2566c1964ba367 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Thu, 11 Jul 2019 22:56:08 -0400
Subject: [PATCH] Improves mouse capture behaviour.

---
 OSBindings/Mac/Clock Signal/Views/CSOpenGLView.m | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/OSBindings/Mac/Clock Signal/Views/CSOpenGLView.m b/OSBindings/Mac/Clock Signal/Views/CSOpenGLView.m
index 4e3685ca1..919fb03ca 100644
--- a/OSBindings/Mac/Clock Signal/Views/CSOpenGLView.m	
+++ b/OSBindings/Mac/Clock Signal/Views/CSOpenGLView.m	
@@ -281,6 +281,10 @@ static CVReturn DisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
 			_mouseIsCaptured = YES;
 			[NSCursor hide];
 			CGAssociateMouseAndMouseCursorPosition(false);
+
+			// Don't report the first click to the delegate; treat that as merely
+			// an invitation to capture the cursor.
+			return;
 		}
 
 		[self.responderDelegate mouseDown:event];