/*
 * Software License Agreement (BSD License)
 *
 *  Point Cloud Library (PCL) - www.pointclouds.org
 *  Copyright (c) 2012, Jeremie Papon.
 *
 *  All rights reserved.
 *
 *  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.
 *   * Neither the name of Willow Garage, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  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 OWNER 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.
 *
 */

#pragma once

#include <pcl/apps/cloud_composer/point_selectors/interactor_style_switch.h>
#include <pcl/visualization/pcl_visualizer.h>
#include <pcl/visualization/qvtk_compatibility.h>

#include <QWidget>

#include <vtkAxesActor.h>
#include <vtkEventQtSlotConnect.h>
#include <vtkOrientationMarkerWidget.h>
#include <vtkSmartPointer.h>
#include <vtkVersion.h>

class QItemSelection;
class QStandardItem;

namespace pcl {
namespace cloud_composer {
class ProjectModel;
/** \brief View class for displaying ProjectModel data using PCLVisualizer
 * \author Jeremie Papon
 * \ingroup cloud_composer
 */
class CloudView : public QWidget {
  Q_OBJECT

public:
  CloudView(QWidget* parent = nullptr);
  CloudView(const CloudView& to_copy);
  CloudView(ProjectModel* model, QWidget* parent = nullptr);

  void
  setModel(ProjectModel* new_model);

  ProjectModel*
  getModel() const
  {
    return model_;
  }

  PCLQVTKWidget*
  getQVTK() const
  {
    return qvtk_;
  }

  pcl::visualization::PCLVisualizer::Ptr
  getPCLVisualizer() const
  {
    return vis_;
  }

  void
  setAxisVisibility(bool visible);

  void
  setInteractorStyle(interactor_styles::INTERACTOR_STYLES style);
public Q_SLOTS:
  void
  refresh();

  /** \brief Slot called when the item selected in cloud browser changes */
  void
  selectedItemChanged(const QItemSelection& selected, const QItemSelection& deselected);

  /** \brief Slot called when the data in model changes */
  void
  dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight);

protected Q_SLOTS:
  /** \brief Slot called when an item in the model changes
   * \param topLeft
   * \param bottomRight
   */
  void
  itemChanged(QStandardItem* item);

  /** \brief Slot called when rows inserted to model
   * \param start Start of new rows (inclusive)
   * \param end End of new rows (inclusive)
   */
  void
  rowsInserted(const QModelIndex& parent, int start, int end);

  void
  rowsAboutToBeRemoved(const QModelIndex& parent, int start, int end);

  void
  selectionCompleted(vtkObject* caller,
                     unsigned long event_id,
                     void* client_data,
                     void* call_data);

  void
  manipulationCompleted(vtkObject* caller,
                        unsigned long event_id,
                        void* client_data,
                        void* call_data);

protected:
  void
  paintEvent(QPaintEvent* event) override;
  void
  resizeEvent(QResizeEvent* event) override;
  //   void scrollContentsBy (int dx, int dy);

private:
  void
  connectSignalsAndSlots();

  /** \brief Internal function for setting up the style_switch_ */
  void
  initializeInteractorSwitch();

  void
  addOrientationMarkerWidgetAxes();
  void
  removeOrientationMarkerWidgetAxes();

  pcl::visualization::PCLVisualizer::Ptr vis_;
  ProjectModel* model_;

  PCLQVTKWidget* qvtk_;

  vtkSmartPointer<InteractorStyleSwitch> style_switch_;

  vtkSmartPointer<vtkOrientationMarkerWidget> axes_widget_;
  vtkSmartPointer<vtkAxesActor> axes_;

  /** \brief Manages VTK events by connecting them to QT slots */
  vtkSmartPointer<vtkEventQtSlotConnect> connections_;
};
} // namespace cloud_composer
} // namespace pcl

Q_DECLARE_METATYPE(pcl::cloud_composer::CloudView);
