From 6ee2e66b56ed6463dc8142f8729bef0f9a07a18f Mon Sep 17 00:00:00 2001
From: Alexander Babikov <lemondrops358@gmail.com>
Date: Fri, 8 Aug 2025 01:36:24 +0500
Subject: [PATCH] Fix the details screen after deleting every machine

---
 src/qt/qt_vmmanager_main.cpp   | 20 ++++++++++++++++++--
 src/qt/qt_vmmanager_system.hpp |  1 +
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/qt/qt_vmmanager_main.cpp b/src/qt/qt_vmmanager_main.cpp
index 484696954..b55e2be2a 100644
--- a/src/qt/qt_vmmanager_main.cpp
+++ b/src/qt/qt_vmmanager_main.cpp
@@ -188,11 +188,19 @@ VMManagerMain::currentSelectionChanged(const QModelIndex &current,
         return;
     }
 
-    disconnect(selected_sysconfig, &VMManagerSystem::configurationChanged, this, &VMManagerMain::onConfigUpdated);
+    /* hack to prevent strange segfaults when adding a machine after
+       removing all machines previously */
+    if (selected_sysconfig->config_signal_connected == true) {
+        disconnect(selected_sysconfig, &VMManagerSystem::configurationChanged, this, &VMManagerMain::onConfigUpdated);
+        selected_sysconfig->config_signal_connected = false;
+    }
     const auto mapped_index = proxy_model->mapToSource(current);
     selected_sysconfig = vm_model->getConfigObjectForIndex(mapped_index);
     vm_details->updateData(selected_sysconfig);
-    connect(selected_sysconfig, &VMManagerSystem::configurationChanged, this, &VMManagerMain::onConfigUpdated);
+    if (selected_sysconfig->config_signal_connected == false) {
+        connect(selected_sysconfig, &VMManagerSystem::configurationChanged, this, &VMManagerMain::onConfigUpdated);
+        selected_sysconfig->config_signal_connected = true;
+    }
 
     // Emit that the selection changed, include with the process state
     emit selectionChanged(current, selected_sysconfig->process->state());
@@ -456,6 +464,14 @@ VMManagerMain::deleteSystem(VMManagerSystem *sysconfig)
         config->remove(sysconfig->uuid);
         vm_model->removeConfigFromModel(sysconfig);
         delete sysconfig;
+
+        if (vm_model->rowCount(QModelIndex()) <= 0) {
+            /* no machines left - get rid of the last machine's leftovers */
+            ui->detailsArea->layout()->removeWidget(vm_details);
+            delete vm_details;
+            vm_details = new VMManagerDetails();
+            ui->detailsArea->layout()->addWidget(vm_details);
+        }
     }
 }
 
diff --git a/src/qt/qt_vmmanager_system.hpp b/src/qt/qt_vmmanager_system.hpp
index 27b9fda57..5914e46cb 100644
--- a/src/qt/qt_vmmanager_system.hpp
+++ b/src/qt/qt_vmmanager_system.hpp
@@ -136,6 +136,7 @@ public:
     QProcess *process = new QProcess();
 
     bool window_obscured;
+    bool config_signal_connected = false;
 
     QString getDisplayValue(VMManager::Display::Name key);
     QFileInfoList getScreenshots();