From 671c944272657a665394a25b3c7e0e08396edd77 Mon Sep 17 00:00:00 2001
From: Bradley Cicenas <bradley@vektor.nyc>
Date: Mon, 12 Jun 2017 13:52:45 +0000
Subject: [PATCH] disable timed display refresh while scrolling

---
 cursor.go | 13 ++++++++++---
 grid.go   |  7 +++++--
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/cursor.go b/cursor.go
index 40e87c8..ad8b383 100644
--- a/cursor.go
+++ b/cursor.go
@@ -14,9 +14,10 @@ var enabledConnectors = map[string]func() connector.Connector{
 }
 
 type GridCursor struct {
-	selectedID string // id of currently selected container
-	filtered   container.Containers
-	cSource    connector.Connector
+	selectedID  string // id of currently selected container
+	filtered    container.Containers
+	cSource     connector.Connector
+	isScrolling bool // toggled when actively scrolling
 }
 
 func NewGridCursor(connector string) *GridCursor {
@@ -109,6 +110,9 @@ func (gc *GridCursor) ScrollPage() {
 }
 
 func (gc *GridCursor) Up() {
+	gc.isScrolling = true
+	defer func() { gc.isScrolling = false }()
+
 	idx := gc.Idx()
 	if idx <= 0 { // already at top
 		return
@@ -125,6 +129,9 @@ func (gc *GridCursor) Up() {
 }
 
 func (gc *GridCursor) Down() {
+	gc.isScrolling = true
+	defer func() { gc.isScrolling = false }()
+
 	idx := gc.Idx()
 	if idx >= gc.Len()-1 { // already at bottom
 		return
diff --git a/grid.go b/grid.go
index e8d379f..c2ff991 100644
--- a/grid.go
+++ b/grid.go
@@ -62,8 +62,11 @@ func ExpandView(c *container.Container) {
 }
 
 func RefreshDisplay() {
-	needsClear := cursor.RefreshContainers()
-	RedrawRows(needsClear)
+	// skip display refresh during scroll
+	if !cursor.isScrolling {
+		needsClear := cursor.RefreshContainers()
+		RedrawRows(needsClear)
+	}
 }
 
 func Display() bool {