From d67163269bcc08dda83268c16f4d7767fe558455 Mon Sep 17 00:00:00 2001
From: Andrew Johnson <andrew@johnson5.net>
Date: Sun, 19 Oct 2025 03:08:28 -0400
Subject: [PATCH] Improve tab key focus in hidable tab bar widget

PR #23379.
---
 src/gui/hidabletabwidget.cpp | 15 ++++++++++++---
 src/gui/hidabletabwidget.h   |  1 +
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/gui/hidabletabwidget.cpp b/src/gui/hidabletabwidget.cpp
index fb2e88df0..7256a05b7 100644
--- a/src/gui/hidabletabwidget.cpp
+++ b/src/gui/hidabletabwidget.cpp
@@ -38,19 +38,28 @@
 HidableTabWidget::HidableTabWidget(QWidget *parent)
     : QTabWidget(parent)
 {
+    // Skip single tab in keyboard navigation (no point navigating to it)
+    tabBar()->setFocusPolicy(Qt::NoFocus);
 }
 
 void HidableTabWidget::tabInserted(const int index)
 {
     QTabWidget::tabInserted(index);
-    tabBar()->setVisible(count() != 1);
+    tabsCountChanged();
 }
 
 void HidableTabWidget::tabRemoved(const int index)
 {
-    //QTabWidget::tabInserted(index);
     QTabWidget::tabRemoved(index);
-    tabBar()->setVisible(count() != 1);
+    tabsCountChanged();
+}
+
+void HidableTabWidget::tabsCountChanged()
+{
+    const qsizetype tabsCount = count();
+    tabBar()->setVisible(tabsCount != 1);
+    // Skip single tab in keyboard navigation (no point navigating to it)
+    tabBar()->setFocusPolicy((tabsCount > 1) ? Qt::StrongFocus : Qt::NoFocus);
 }
 
 #ifdef Q_OS_MACOS
diff --git a/src/gui/hidabletabwidget.h b/src/gui/hidabletabwidget.h
index 66442475b..2c54556fe 100644
--- a/src/gui/hidabletabwidget.h
+++ b/src/gui/hidabletabwidget.h
@@ -42,6 +42,7 @@ public:
 private:
     void tabInserted(int index) override;
     void tabRemoved(int index) override;
+    void tabsCountChanged();
 
 #ifdef Q_OS_MACOS
     void paintEvent(QPaintEvent *event) override;