From 05b63462503db22d83fee994a20b37e3675e0a26 Mon Sep 17 00:00:00 2001
From: Matt Gajownik <matt@obsproject.com>
Date: Sat, 6 Aug 2022 15:32:31 +1000
Subject: [PATCH] frontend-tools: Display dialog when changing Python version

Runtime switching of Python version is not supported.
---
 .../frontend-tools/data/locale/en-US.ini       |  2 ++
 UI/frontend-plugins/frontend-tools/scripts.cpp | 18 +++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/UI/frontend-plugins/frontend-tools/data/locale/en-US.ini b/UI/frontend-plugins/frontend-tools/data/locale/en-US.ini
index 46d8056d9..80f2a4118 100644
--- a/UI/frontend-plugins/frontend-tools/data/locale/en-US.ini
+++ b/UI/frontend-plugins/frontend-tools/data/locale/en-US.ini
@@ -41,6 +41,8 @@ PythonSettings.PythonInstallPath64bit="Python Install Path (64bit)"
 PythonSettings.BrowsePythonPath="Browse Python Path"
 PythonSettings.PythonVersion="Loaded Python Version: %1"
 PythonSettings.PythonNotLoaded="Python not currently loaded"
+PythonSettings.AlreadyLoaded.Title="Python Already Loaded"
+PythonSettings.AlreadyLoaded.Message="A copy of Python %1 is already loaded. To load the newly selected Python version, please restart OBS."
 ScriptLogWindow="Script Log"
 Description="Description"
 ScriptDescriptionLink.Text="Open this link in your default web browser?"
diff --git a/UI/frontend-plugins/frontend-tools/scripts.cpp b/UI/frontend-plugins/frontend-tools/scripts.cpp
index 66fbd4ef6..c4174da4f 100644
--- a/UI/frontend-plugins/frontend-tools/scripts.cpp
+++ b/UI/frontend-plugins/frontend-tools/scripts.cpp
@@ -470,8 +470,24 @@ void ScriptsTool::on_pythonPathBrowse_clicked()
 
 	ui->pythonPath->setText(newPath);
 
-	if (obs_scripting_python_loaded())
+	bool loaded = obs_scripting_python_loaded();
+
+	if (loaded && !newPath.isEmpty() && curPath.compare(newPath) != 0) {
+		char version[8];
+		obs_scripting_python_version(version, sizeof(version));
+		QString message =
+			QString(obs_module_text(
+					"PythonSettings.AlreadyLoaded.Message"))
+				.arg(version);
+		OBSMessageBox::information(
+			this,
+			obs_module_text("PythonSettings.AlreadyLoaded.Title"),
+			message);
 		return;
+	} else if (loaded) {
+		return;
+	}
+
 	if (!obs_scripting_load_python(path))
 		return;