From ac8861a429f8de2a18daefd61ad89bf6577ee2a8 Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Tue, 12 Apr 2022 22:23:08 -0700
Subject: [PATCH] Qt: Fix crash when clicking past last tile in viewer

---
 CHANGES                         | 1 +
 src/platform/qt/TilePainter.cpp | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index f3d139d0d..5a4c39fba 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,7 @@ Other fixes:
  - FFmpeg: Fix GIF recording (fixes mgba.io/i/2393)
  - GB, GBA: Save writeback-pending masked saves on unload (fixes mgba.io/i/2396)
  - mGUI: Fix FPS counter after closing menu
+ - Qt: Fix crash when clicking past last tile in viewer
  - VFS: Failed file mapping should return NULL on POSIX
 Misc:
  - GB MBC: Filter out MBC errors when cartridge is yanked (fixes mgba.io/i/2488)
diff --git a/src/platform/qt/TilePainter.cpp b/src/platform/qt/TilePainter.cpp
index 9a1238699..c27ade72e 100644
--- a/src/platform/qt/TilePainter.cpp
+++ b/src/platform/qt/TilePainter.cpp
@@ -41,7 +41,10 @@ void TilePainter::resizeEvent(QResizeEvent*) {
 void TilePainter::mousePressEvent(QMouseEvent* event) {
 	int x = event->x() / m_size;
 	int y = event->y() / m_size;
-	emit indexPressed(y * (width() / m_size) + x);
+	int index = y * (width() / m_size) + x;
+	if (index < m_tileCount) {
+		emit indexPressed(index);
+	}
 }
 
 void TilePainter::clearTile(int index) {