From ec30c595c48037d6b59013cc3f5b7a1ff96bc8c2 Mon Sep 17 00:00:00 2001
From: Bryan Ashby <bryan@l33t.codes>
Date: Sat, 9 Jun 2018 22:50:57 -0600
Subject: [PATCH] Fix drawing like page up/down

---
 core/vertical_menu_view.js | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/core/vertical_menu_view.js b/core/vertical_menu_view.js
index fe5c1203..7e8fc808 100644
--- a/core/vertical_menu_view.js
+++ b/core/vertical_menu_view.js
@@ -312,12 +312,31 @@ VerticalMenuView.prototype.focusNextPageItem = function() {
 };
 
 VerticalMenuView.prototype.focusFirst = function() {
+	if(0 < this.viewWindow.top) {
+		this.oldDimens = Object.assign({}, this.dimens);
+	}
 	this.setFocusItemIndex(0);
 	return VerticalMenuView.super_.prototype.focusFirst.call(this);
 };
 
 VerticalMenuView.prototype.focusLast = function() {
-	this.setFocusItemIndex(this.items.length - 1);
+	const index = this.items.length - 1;
+
+	if(index > this.viewWindow.bottom) {
+		this.oldDimens = Object.assign({}, this.dimens);
+
+		this.focusedItemIndex = index;
+
+		this.viewWindow = {
+			top		: this.focusedItemIndex,
+			bottom	: Math.min(this.focusedItemIndex + this.maxVisibleItems, this.items.length) - 1
+		};
+
+		this.redraw();
+	} else {
+		this.setFocusItemIndex(index);
+	}
+
 	return VerticalMenuView.super_.prototype.focusLast.call(this);
 };