From 0bc80c5ed9d7e21c3d4fe702c4eb018428d44b81 Mon Sep 17 00:00:00 2001
From: Luca Toniolo <10792599+grandixximo@users.noreply.github.com>
Date: Mon, 17 Aug 2026 20:53:31 +0800
Subject: [PATCH] hal_glib: defer file-loaded when the interp is already
 running

GSTAT only emits 'file-loaded' if the poll that first sees stat.file
change finds the interp IDLE. A client doing program_open + AUTO_RUN
back to back starts the program within ms, so every 100 ms poll sees
the file with the interp busy, the remap guard swallows the change,
and the signal is never emitted: gmoccapy sits at 'No Program loaded'
with an empty editor and preview after an externally driven run, and
whether it does depends on poll timing.

Emit a skipped change on the first poll with the interp back at IDLE.
Remap protection unchanged: merge() ignores the file name at call
level != 0.
---
 lib/python/common/hal_glib.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/python/common/hal_glib.py b/lib/python/common/hal_glib.py
index 864bf95b0ec..a157a3f47c0 100644
--- a/lib/python/common/hal_glib.py
+++ b/lib/python/common/hal_glib.py
@@ -330,6 +330,7 @@ def __init__(self, stat = None):
         self._status_active = False
         self.old = {}
         self.old['tool-prep-number'] = 0
+        self._file_load_pending = False
         self.previous_mode = self.MANUAL
         try:
             self.stat.poll()
@@ -677,6 +678,17 @@ def update(self):
             # a reload of the preview and sourceview widgets
             if self.stat.interp_state == linuxcnc.INTERP_IDLE and file_new != "":
                 self.emit('file-loaded', file_new)
+            elif file_new != "":
+                # also defer a legit program that was opened and started
+                # before this poll saw it, or the GUI never shows it
+                self._file_load_pending = True
+            else:
+                self._file_load_pending = False
+        if self._file_load_pending and \
+                self.stat.interp_state == linuxcnc.INTERP_IDLE and \
+                self.old['file']:
+            self._file_load_pending = False
+            self.emit('file-loaded', self.old['file'])
 
         #ToDo : Find a way to avoid signal when the line changed due to
         #       a remap procedure, because the signal do highlight a wrong