From 845a9a7b9cc8c9d13b797333eb697820d3058c51 Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Tue, 28 Apr 2026 12:09:55 -0400
Subject: [PATCH] a first try at a Qt idlecheckpoint implementation

---
 include/config.h   |  1 +
 win/Qt/qt_bind.cpp | 70 +++++++++++++++++++++++++++++++++++++++++++++-
 win/Qt/qt_bind.h   |  3 ++
 3 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/include/config.h b/include/config.h
index b54d073de..6eacad389 100644
--- a/include/config.h
+++ b/include/config.h
@@ -687,6 +687,7 @@ typedef unsigned char uchar;
  * will perform an update to the checkpoint file.
  * Currently has support in:
  *     WIN32CON
+ *     Qt
  */
 
 /* #define IDLECHECKPOINT */
diff --git a/win/Qt/qt_bind.cpp b/win/Qt/qt_bind.cpp
index fd55061e2..10e2c3d8f 100644
--- a/win/Qt/qt_bind.cpp
+++ b/win/Qt/qt_bind.cpp
@@ -70,6 +70,14 @@ static struct key_macro_rec {
     { 0, 0U, (const char *) 0, (const char *) 0 }
 };
 
+#ifdef IDLECHECKPOINT
+#ifndef IDLECHECKPOINT_WAIT_TIME
+#define IDLECHECKPOINT_WAIT_TIME 10
+#endif
+static void qt_timer_fire(void);
+QTimer *qt_input_timer;
+#endif
+
 static QPen *pen = (QPen *) 0;
 
 NetHackQtBind::NetHackQtBind(int& argc, char** argv) :
@@ -309,6 +317,11 @@ public:
  
 void NetHackQtBind::qt_exit_nhwindows(const char *)
 {
+#ifdef IDLECHECKPOINT
+    if (qt_input_timer) {
+        NetHackQtBind::free_qt_input_timer();
+    }
+#endif
 #if defined(QWS)
     // Avoids bug in SHARP SL5500
     ((TApp*)qApp)->lwc();
@@ -653,11 +666,58 @@ QCoreApplication::exec: The event loop is already running
     return keybuffer.GetAscii();
 }
 
+#ifdef IDLECHECKPOINT
+void
+NetHackQtBind::free_qt_input_timer(void)
+{
+    if (qt_input_timer) {
+        if (qt_input_timer->isActive())
+            qt_input_timer->stop();
+        if (qt_input_timer)
+            delete qt_input_timer;
+        qt_input_timer = 0;
+    }
+}
+
+static void
+qt_timer_fire(void)
+{
+#if defined(INSURANCE)
+    if (iflags.idlecheckpoint) {
+        /* no input for 30 seconds, so let's take
+         * advantage and do a game checkpoint,
+         * then resume the wait.
+         */
+        save_currentstate();
+    }
+    if (qt_input_timer->isActive())
+        qt_input_timer->stop();
+#endif /* INSURANCE */
+}
+
+//void
+//cancel_qt_input_timer(void)
+//{
+//
+//}
+#endif  /* IDLECHECKPOINT */
+
 int NetHackQtBind::qt_nh_poskey(coordxy *x, coordxy *y, int *mod)
 {
     if (main)
 	main->fadeHighlighting(true);
 
+#ifdef IDLECHECKPOINT
+    if (iflags.idlecheckpoint) {
+        if (!qt_input_timer) {
+            qt_input_timer = new QTimer();
+	    qt_input_timer->setSingleShot(true);
+	    connect(qt_input_timer, &QTimer::timeout, &qt_timer_fire);
+        }
+        if (!qt_input_timer->isActive())
+	    qt_input_timer->start(IDLECHECKPOINT_WAIT_TIME * 1000);
+    }
+#endif
     // Process events until a key or map-click arrives.
     //
     while (keybuffer.Empty() && clickbuffer.Empty()) {
@@ -672,12 +732,20 @@ int NetHackQtBind::qt_nh_poskey(coordxy *x, coordxy *y, int *mod)
         main->fadeHighlighting(false);
 
     if (!keybuffer.Empty()) {
-	return keybuffer.GetAscii();
+#ifdef IDLECHECKPOINT
+        if (qt_input_timer->isActive())
+            qt_input_timer->stop();
+#endif
+        return keybuffer.GetAscii();
     } else {
 	*x=clickbuffer.NextX();
 	*y=clickbuffer.NextY();
 	*mod=clickbuffer.NextMod();
 	clickbuffer.Get();
+#ifdef IDLECHECKPOINT
+        if (qt_input_timer->isActive())
+            qt_input_timer->stop();
+#endif
 	return 0;
     }
 }
diff --git a/win/Qt/qt_bind.h b/win/Qt/qt_bind.h
index d0c71759c..45336c29f 100644
--- a/win/Qt/qt_bind.h
+++ b/win/Qt/qt_bind.h
@@ -106,6 +106,9 @@ public:
         static void qtsound_ambience(int32_t, int32_t, int32_t);
         static void qtsound_verbal(char *text, int32_t gender, int32_t tone, int32_t vol, int32_t moreinfo);
 #endif
+#ifdef IDLECHECKPOINT
+        static void free_qt_input_timer(void);
+#endif
 
 private:
 	virtual bool notify(QObject *receiver, QEvent *event);