text: /*
   * Copyright (c) 2011-2019, The DART development contributors
   * All rights reserved.
   *
   * The list of contributors can be found at:
   *   https://github.com/dartsim/dart/blob/master/LICENSE
   *
   * This file is provided under the following "BSD-style" License:
   *   Redistribution and use in source and binary forms, with or
   *   without modification, are permitted provided that the following
   *   conditions are met:
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * Redistributions in binary form must reproduce the above
   *     copyright notice, this list of conditions and the following
   *     disclaimer in the documentation and/or other materials provided
   *     with the distribution.
   *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   *   CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   *   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   *   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   *   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
   *   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   *   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   *   AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   *   ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *   POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef DART_GUI_OSG_TRACKBALLMANIPULATOR_HPP_
  #define DART_GUI_OSG_TRACKBALLMANIPULATOR_HPP_
  
  #include <osgGA/OrbitManipulator>
  
  namespace dart {
  namespace gui {
  namespace osg {
  
  #define DART_META_Object(library,name) \
          ::osg::Object* cloneType() const override { return new name (); } \
          ::osg::Object* clone(const ::osg::CopyOp& copyop) const override { return new name (*this,copyop); } \
          bool isSameKindAs(const ::osg::Object* obj) const override { return dynamic_cast<const name *>(obj)!=NULL; } \
          const char* libraryName() const override { return #library; }\
          const char* className() const override { return #name; }
  // TODO(JS): Copied from osg/Object. Due to the namespace conflict between osg
  // and dart::gui::osg, we need to explicitly specify the root namespace osg as
  // ::osg
  
  class OSGGA_EXPORT TrackballManipulator : public ::osgGA::OrbitManipulator
  {
  public:
    /// Constructor
    TrackballManipulator(int flags=DEFAULT_SETTINGS);
  
    /// Copy-constructor
    TrackballManipulator(const TrackballManipulator& tm,
                         const ::osg::CopyOp& copyOp = ::osg::CopyOp::SHALLOW_COPY);
  
    /// Destructor
    virtual ~TrackballManipulator();
  
    /// Overriding behavior of left mouse button
    bool performMovementLeftMouseButton(const double eventTimeDelta,
                                        const double dx,
                                        const double dy) override;
  
    /// Overriding behavior of right mouse button
    bool performMovementRightMouseButton(const double eventTimeDelta,
                                         const double dx,
                                         const double dy) override;
  
    DART_META_Object( dart-gui-osg, TrackballManipulator )
    // TODO(MXG): Consider applying the META macros to every dart::gui::osg Node
  };
  
  } // namespace osg
  } // namespace gui
  } // namespace dart
  
  #endif // DART_GUI_OSG_TRACKBALLMANIPULATOR_HPP_
  