From 8ad538c98beb40c5503cb9258c721776dce12e37 Mon Sep 17 00:00:00 2001
From: Justin Mitchell <justin@jmitch.com>
Date: Mon, 15 Jun 2026 16:28:23 -0400
Subject: [PATCH] Fix back gesture to use logical screen coordinates

Changed the fallback corner gesture detection to use logical (orientation-mapped) coordinates instead of native panel coordinates. This ensures the gesture area remains in the visual top-left corner across all screen orientations, particularly for screens without a header or Back button target like the reader.
---
 src/MappedInputManager.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/MappedInputManager.cpp b/src/MappedInputManager.cpp
index abde5d48..77da09e6 100644
--- a/src/MappedInputManager.cpp
+++ b/src/MappedInputManager.cpp
@@ -70,8 +70,11 @@ bool MappedInputManager::wasBackGesture() const {
   renderer.tapToLogical(nx, ny, lx, ly);
   int id = 0;
   if (TouchRegistry::getInstance().hitTest(lx, ly, TouchRegistry::Back, id)) return true;
-  // Fallback corner gesture (panel-native, generous; works even with no Back target).
-  return nx <= BACK_GESTURE_FRAC_X && ny <= BACK_GESTURE_FRAC_Y;
+  // Fallback corner gesture: top-left of the LOGICAL screen (orientation-mapped), so
+  // it lands on the visual top-left in every orientation and works on screens with no
+  // header/Back target (e.g. the reader).
+  return lx <= renderer.getScreenWidth() * BACK_GESTURE_FRAC_X &&
+         ly <= renderer.getScreenHeight() * BACK_GESTURE_FRAC_Y;
 }
 
 bool MappedInputManager::wasItemTapped(int& id) const {