Qt 5.9 | Qt Data Visualization | Custom Input Example | custominputhandler.cpp Example File

Qt 5.9.9 Reference Documentation

# custominputhandler.cpp Example File

custominput/custominputhandler.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Data Visualization module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** 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 General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU
      ** General Public License version 3 or (at your option) any later version
      ** approved by the KDE Free Qt Foundation. The licenses are as published by
      ** the Free Software Foundation and appearing in the file LICENSE.GPL3
      ** included in the packaging of this file. Please review the following
      ** information to ensure the GNU General Public License requirements will
      ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include "custominputhandler.h"

      #include <QtDataVisualization/Q3DCamera>

      CustomInputHandler::CustomInputHandler(QObject *parent) :
          QAbstract3DInputHandler(parent)
      {
      }

      void CustomInputHandler::mouseMoveEvent(QMouseEvent *event, const QPoint &mousePos)
      {
          Q_UNUSED(event)
          setInputPosition(mousePos);
      }

      void CustomInputHandler::wheelEvent(QWheelEvent *event)
      {
          // Adjust zoom level based on what zoom range we're in.
          int zoomLevel = scene()->activeCamera()->zoomLevel();
          if (zoomLevel > 100)
              zoomLevel += event->angleDelta().y() / 12;
          else if (zoomLevel > 50)
              zoomLevel += event->angleDelta().y() / 60;
          else
              zoomLevel += event->angleDelta().y() / 120;
          if (zoomLevel > 500)
              zoomLevel = 500;
          else if (zoomLevel < 10)
              zoomLevel = 10;

          scene()->activeCamera()->setZoomLevel(zoomLevel);
      }