Add platform type conversions documentation

Change-Id: I2e1a27d027f6110ed4e63f391cd7ceaff6c4d9b8
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

2 files changed, 55 insertions, 0 deletions

diff --git a/doc/src/platformintegration/platformintegration.qdoc b/doc/src/platformintegration/platformintegration.qdoc
index 0957fe8d..91b7dc57 100644
--- a/doc/src/platformintegration/platformintegration.qdoc
+++ b/doc/src/platformintegration/platformintegration.qdoc
@@ -45,6 +45,17 @@
 
     \section1 Type Conversions
 
+    \include platformintegration.qdocinc type-conversions
+
+    For example, to get the current user's username on Apple platforms:
+
+    \code
+        NSProcessInfo *processInfo = NSProcessInfo.processInfo;
+        QString userName = QString::fromNSString(processInfo.userName)
+    \endcode
+
+    For a complete list of all type conversions, see the \l{Type Conversions} overview.
+
     \section1 Window Embedding
 
     \section1 Native Interfaces
@@ -61,3 +72,12 @@
     The main abstraction layer here is the \l{Qt Platform Abstraction},
     or QPA for short, which deals with window system integration and related use-cases.
 */
+
+/*!
+    \group platform-type-conversions
+    \title Type Conversions
+
+    \include platformintegration.qdocinc type-conversions
+
+    The following list enumerates all of the available type conversions:
+*/
diff --git a/doc/src/platformintegration/platformintegration.qdocinc b/doc/src/platformintegration/platformintegration.qdocinc
new file mode 100644
index 00000000..e394ad50
--- /dev/null
+++ b/doc/src/platformintegration/platformintegration.qdocinc
@@ -0,0 +1,35 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+
+//! [type-conversions]
+Many of Qt's basic data types, such as QString, QPoint, or QImage, provide
+conversions to and from the native equivalent types.
+//! [type-conversions]
+
+*/