From 6808aa12bed24f846a6e1db2b30bd4ce4d4cb540 Mon Sep 17 00:00:00 2001
From: moncho <ramon.cr@gmail.com>
Date: Sat, 27 Feb 2016 19:49:25 +0100
Subject: [PATCH] Sync screen clear

---
 ui/screen.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ui/screen.go b/ui/screen.go
index c75410d5..f4eca452 100644
--- a/ui/screen.go
+++ b/ui/screen.go
@@ -61,14 +61,18 @@ func (screen *Screen) Resize() *Screen {
 
 //Clear makes the entire screen blank using default background color.
 func (screen *Screen) Clear() *Screen {
+	screen.termboxMutex.Lock()
+	defer screen.termboxMutex.Unlock()
 	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
 	screen.cleared = true
-	screen.Flush()
+	termbox.Flush()
 	return screen
 }
 
 // Sync forces a complete resync between the termbox and a terminal.
 func (screen *Screen) Sync() *Screen {
+	screen.termboxMutex.Lock()
+	defer screen.termboxMutex.Unlock()
 	termbox.Sync()
 	return screen
 }