commit a9e66ffa4eb61a4728d536d20f916a5a02ab5626
from: Xiao-Yong <jinxiaoyong@gmail.com>
via: Russ Cox <rsc@golang.org>
date: Wed Nov 14 04:57:56 2018 UTC

devdraw: make ctrl generate 1-click while mouse down (#119)

This makes 2-1 chords possible with touchpad on a mac laptop.

commit - 931c5906118e4db3419bfb4dced833902eb14139
commit + a9e66ffa4eb61a4728d536d20f916a5a02ab5626
blob - e7296e44dee01f9018ff28d8d350b7685371c6ad
blob + 16053eaa2a1157c7f31e737a6f95ed13a71294b5
--- src/cmd/devdraw/cocoa-screen.m
+++ src/cmd/devdraw/cocoa-screen.m
@@ -927,6 +927,8 @@ getkeyboard(NSEvent *e)
 	case NSFlagsChanged:
 		if(in.mbuttons || in.kbuttons){
 			in.kbuttons = 0;
+			if(m & NSControlKeyMask)
+				in.kbuttons |= 1;
 			if(m & NSAlternateKeyMask)
 				in.kbuttons |= 2;
 			if(m & NSCommandKeyMask)