From 565bb8052ff869cb103fcbe0fe34ed7a3ee1070f Mon Sep 17 00:00:00 2001
From: Thomas Hartmann <thomas.hartmann@qt.io>
Date: Wed, 26 Oct 2022 15:42:47 +0200
Subject: QmlDesigner: Add option to allow multiple projects

Setting QML/Designer/AllowMultipleProjects to true
allows multiple projects.

Task-number: QDS-7865
Change-Id: Ib44653e48cfbdb439c18dc2d3c57a4ae2ab0ee43
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
---
 src/plugins/qmlprojectmanager/qmlproject.cpp | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/plugins/qmlprojectmanager/qmlproject.cpp b/src/plugins/qmlprojectmanager/qmlproject.cpp
index ba00ad797f..4a9737d091 100644
--- a/src/plugins/qmlprojectmanager/qmlproject.cpp
+++ b/src/plugins/qmlprojectmanager/qmlproject.cpp
@@ -88,6 +88,14 @@ static int preferedQtTarget(Target *target)
     return 5;
 }
 
+static bool allowOnlySingleProject()
+{
+    QSettings *settings = Core::ICore::settings();
+    const QString qdsAllowMultipleProjects = "QML/Designer/AllowMultipleProjects";
+
+    return !settings->value(qdsAllowMultipleProjects, false).toBool();
+}
+
 const char openInQDSAppSetting[] = "OpenInQDSApp";
 
 Utils::FilePaths QmlProject::getUiQmlFilesForFolder(const Utils::FilePath &folder)
@@ -110,9 +118,10 @@ QmlProject::QmlProject(const Utils::FilePath &fileName)
     setBuildSystemCreator([](Target *t) { return new QmlBuildSystem(t); });
 
     if (QmlProject::isQtDesignStudio()) {
-
-        EditorManager::closeAllDocuments();
-        SessionManager::closeAllProjects();
+        if (allowOnlySingleProject()) {
+            EditorManager::closeAllDocuments();
+            SessionManager::closeAllProjects();
+        }
 
         m_openFileConnection
             = connect(this,
-- 
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