Doc: add a "Focus Management in Qt Quick Controls 2" page

This will list each control that is a focus scope, and have
some relevant information about focus in Qt Quick Controls 2.

Change-Id: I3126452bf73f7d7730d0522d616d61ad0da0dd74
Reviewed-by: J-P Nurmi <jpnurmi@qt.io>

1 files changed, 47 insertions, 0 deletions

diff --git a/src/imports/controls/doc/src/qtquickcontrols2-focus.qdoc b/src/imports/controls/doc/src/qtquickcontrols2-focus.qdoc
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+/****************************************************************************
+**
+** Copyright (C) 2018 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \page qtquickcontrols2-focus.html
+    \title Focus Management in Qt Quick Controls 2
+    \brief Overview of focus handling with Qt Quick Controls 2
+
+    Qt Quick Controls 2 follows the standard
+    \l {Keyboard Focus in Qt Quick}{Qt Quick focus system}, while also
+    providing some added convenience. For example, the
+    \l {Control::}{focusPolicy} property can be used to control the ways in
+    which a control receives focus.
+
+    \section1 Focus Scope Controls
+
+    Qt Quick Controls 2 offers a selection of controls that act as
+    \l {Acquiring Focus and Focus Scopes}{focus scopes}:
+
+    \annotatedlist qtquickcontrols2-focusscopes
+
+    \sa {Keyboard Focus in Qt Quick}
+*/