1 files changed, 55 insertions, 0 deletions
diff --git a/doc/src/snippets/porting-qx11info/testwindow.cpp b/doc/src/snippets/porting-qx11info/testwindow.cpp
new file mode 100644
index 00000000..d46c75e0
--- /dev/null
+++ b/doc/src/snippets/porting-qx11info/testwindow.cpp
@@ -0,0 +1,55 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "testwindow.h"
+
+//! [0]
+#include <QtGui/QGuiApplication>
+//! [0]
+#include <QDebug>
+
+#if defined(Q_OS_UNIX)
+#if QT_VERSION < 0x060000
+#include <QtX11Extras/QX11Info>
+#endif
+#endif
+
+#include <X11/Xlib.h>
+#include <xcb/xcb.h>
+
+TestWindow::TestWindow(QWindow *parent)
+    : QWindow(parent)
+{
+
+#if QT_VERSION < 0x060000
+    Display *display = QX11Info::display();
+    xcb_connection_t *connection = QX11Info::connection();
+    bool isPlatformX11 = QX11Info::isPlatformX11();
+#else
+//! [1]
+    Display *display = nullptr;
+    xcb_connection_t *connection = nullptr;
+    bool isPlatformX11 = false;
+    if (auto *x11Application = qGuiApp->nativeInterface<QNativeInterface::QX11Application>()) {
+        display = x11Application->display();
+        connection = x11Application->connection();
+        isPlatformX11 = true;
+    }
+    // or
+    // isPlatformX11 = qGuiApp->nativeInterface<QNativeInterface::QX11Application>();
+//! [1]
+#endif
+
+    qDebug() << "Display *display=" << display;
+    if (display)
+        qDebug() << "XConnectionNumber=" << XConnectionNumber(display);
+
+    qDebug() << "xcb_connection_t *xcbConnection=" << connection;
+    if (connection) {
+        const xcb_setup_t *xcbSetup = xcb_get_setup(connection);
+        if (xcbSetup)
+            qDebug() << "protocol_major_version=" << xcbSetup->protocol_major_version << ", protocol_minor_version=" << xcbSetup->protocol_minor_version;
+    }
+
+    qDebug() << "isPlatformX11=" << isPlatformX11;
+}