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-/****************************************************************************
-**
-** Copyright (C) 2016 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.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
- \example custominput
- \title Custom Input Example
- \ingroup qtdatavisualization_examples
- \brief Implementing custom input handler in a widget application.
-
- The Custom Input example shows how to customize the 3D graph controls in a widget application
- using a custom graph input handler to capture and process mouse events.
- The code in this example shows also how the camera is controlled by using QPropertyAnimation
- to animate the camera and item selection is done on mouseover rather than clicking any mouse
- buttons. Also the code shows how to implement similar zoom with mouse wheel functionality as
- the default input handler implements.
-
- \image custominput-example.png
-
- \include examples-run.qdocinc
-
- \section1 Replacing Default Input Handling
-
- The default input handling mechanism is replaced by setting the active input handler of
- Q3DScatter to \c CustomInputHandler that implements the custom behavior.
-
- \snippet custominput/scatterdatamodifier.cpp 0
-
- \section1 Implementing Custom Selection Handling
-
- The on mouseover selection handling is implemented in the \c CustomInputHandler that captures
- the mouse events. It then stores the last known coordinates to the
- QAbstract3DInputHandler::inputPosition property.
-
- \snippet custominput/custominputhandler.cpp 0
-
- As the selection is one shot, and is cleared each time a 3D frame is rendered, a timer is setup
- to retrigger selection so that the selection moves to the item currently under the mouse cursor
- as the camera animates around the graph even when the mouse cursor is not moving.
-
- \snippet custominput/scatterdatamodifier.cpp 1
-
- \section1 Implementing Custom Zoom Handling
-
- The camera has a zoom factor that represents amount of zoom in percentages. In this example the
- zoom range is limited between 10% and 500%. This range is then divided to four subranges where
- \c angleDelta is scaled to different amount of zoom change based on the current subrange.
-
- \snippet custominput/custominputhandler.cpp 1
-
- \section1 Implementing Custom Camera Handling
-
- The camera is animated to constantly rotate around the graph with two animations. The rotation
- around the graph is done with a simple QPropertyAnimation that just increments during 20
- seconds from 0 degrees to 360 degrees and sets the Q3DCamera::xRotation property.
-
- \snippet custominput/scatterdatamodifier.cpp 2
-
- The camera movement up and down is implemented with a QSequentialAnimationGroup that varies
- the Q3DCamera::yRotation property of the camera from 5 degrees to 45 degrees and back with in
- and out easing.
-
- \snippet custominput/scatterdatamodifier.cpp 3
-*/