Widgets required for FileDialog

On systems without native file dialog

CMakeLists.txt

@@ -7,6 +7,7 @@ set(CMAKE_AUTORCC ON)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 find_package(Qt6 6.2 COMPONENTS Quick REQUIRED)
+find_package(Qt6 COMPONENTS Widgets REQUIRED)
 
 qt_add_executable(appUnixsocketPlayground2
     main.cpp
@@ -38,4 +39,5 @@ set_target_properties(appUnixsocketPlayground2 PROPERTIES
 target_compile_definitions(appUnixsocketPlayground2
     PRIVATE $<$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>:QT_QML_DEBUG>)
 target_link_libraries(appUnixsocketPlayground2
+    PRIVATE Qt6::Widgets
     PRIVATE Qt6::Quick)

main.cpp

-#include <QGuiApplication>
+#include <QApplication>
 #include <QQmlApplicationEngine>
 #include "qunixsockettotcpserver.h"
 
 int main(int argc, char *argv[])
 {
-    QGuiApplication app(argc, argv);
+    QApplication app(argc, argv);
 
     auto server = new QUnixsocketToTcpServer("/var/run/docker.sock");
     server->listen(QHostAddress::LocalHost,2323);