From 0abc96af5deb5895bc43355554a4f66b46d42acf Mon Sep 17 00:00:00 2001
From: "G.K.MacGregor" <gkthemac@gmail.com>
Date: Tue, 16 Feb 2021 18:19:29 +0000
Subject: [PATCH] Filter Ctrl keypresses in main widget

---
 mainwidget.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mainwidget.cpp b/mainwidget.cpp
index 98cd5a9..c532607 100644
--- a/mainwidget.cpp
+++ b/mainwidget.cpp
@@ -248,6 +248,8 @@ void TeletextWidget::keyPressEvent(QKeyEvent *event)
 		// A character-typing key was pressed
 		// Try to keymap it, if not keymapped then plain ASCII code (may be) returned
 		char mappedKeyPress = keymapping[m_pageRender.level1CharSet(m_teletextDocument->cursorRow(), m_teletextDocument->cursorColumn())].value(event->text().at(0), *qPrintable(event->text()));
+		if (mappedKeyPress < 0x20)
+			return;
 		// If outside ASCII map then the character can't be represented by current Level 1 character set
 		// Map it to block character so it doesn't need to be inserted-between later on
 		if (mappedKeyPress & 0x80)