From 728976bdebdd09e40edee0b28462989ad7118ed6 Mon Sep 17 00:00:00 2001
From: Arthur Sonzogni <sonzogniarthur@gmail.com>
Date: Wed, 5 Jan 2022 12:04:03 +0100
Subject: [PATCH] Fix vscroll indicator (#295)

* Clear vscroll_indicator content before drawing it.
---
 src/ftxui/dom/scroll_indicator.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ftxui/dom/scroll_indicator.cpp b/src/ftxui/dom/scroll_indicator.cpp
index ec07467..541deda 100644
--- a/src/ftxui/dom/scroll_indicator.cpp
+++ b/src/ftxui/dom/scroll_indicator.cpp
@@ -54,6 +54,7 @@ Element vscroll_indicator(Element child) {
         bool down = (2 * y - 0 >= start_y) && (2 * y - 0 <= start_y + size);
 
         const char* c = up ? (down ? "┃" : "╹") : (down ? "╻" : " ");
+        screen.PixelAt(x, y) = Pixel();
         screen.PixelAt(x, y).character = c;
         screen.PixelAt(x, y).inverted = true;
       }