Revision control

++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
++
++ /*!
++ \example touch/knobs
++ \title Touch Knobs Example
++ \examplecategory {User Interface Components}
++ \ingroup touchinputexamples
++ \ingroup examples-user-input
++ \brief Shows how to create custom controls that accept touch input.
++
++ The Touch Knobs example shows how to create custom controls that
++ accept touch input.
++
++ \image touch-knobs-example.png {Two knobs that respond to touch input}
++ */