/*
 * Copyright (C) 2012-2016 Open Source Robotics Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
*/

#ifndef _GAZEBO_GUI_BUILDING_FLOORITEM_HH_
#define _GAZEBO_GUI_BUILDING_FLOORITEM_HH_

#include <memory>

#include "gazebo/gui/qt.h"
#include "gazebo/gui/building/RectItem.hh"

#include "gazebo/util/system.hh"

namespace gazebo
{
  namespace gui
  {
    class WallSegmentItem;

    // Forward declare private data.
    class FloorItemPrivate;

    /// \addtogroup gazebo_gui
    /// \{

    /// \class FloorItem FloorItem.hh
    /// \brief 2D representation of a floor.
    class GZ_GUI_VISIBLE FloorItem : public RectItem
    {
      Q_OBJECT

      /// \brief Constructor
      public: FloorItem();

      /// \brief Destructor
      public: ~FloorItem();

      // Documentation inherited.
      public: virtual QVector3D GetSize() const;

      // Documentation inherited.
      public: virtual QVector3D GetScenePosition() const;

      // Documentation inherited.
      public: virtual double GetSceneRotation() const;

      /// \brief Attach walls so the floor can auto expand to hold the wall.
      /// \param[in] _wallSegmentItem Wall item to attach to the floor.
      public: void AttachWallSegment(WallSegmentItem *_wallSegmentItem);

      // Documentation inherited.
      private: virtual void paint(QPainter *_painter,
          const QStyleOptionGraphicsItem *_option, QWidget *_widget);

      // Documentation inherited.
      private: virtual void mousePressEvent(QGraphicsSceneMouseEvent *_event);

      // Documentation inherited.
      private: virtual void contextMenuEvent(
          QGraphicsSceneContextMenuEvent *_event);

      /// \brief Qt callback tonNotify that the bounding box of the wall items
      /// needs to be changed.
      private slots: void NotifyChange();

      /// \brief Qt callback to recalculate the bounding box of wall items.
      private slots: void RecalculateBoundingBox();

      /// \brief Qt callback when a wall is being deleted.
      private slots: void WallSegmentDeleted();

      /// \brief Update the floor properties and emit Qt signals
      private: void Update();

      /// \brief Emit floor changed Qt signals.
      public: void FloorChanged();

      /// \brief Emit size changed Qt signals.
      private: void SizeChanged();

      /// \internal
      /// \brief Pointer to private data.
      private: std::unique_ptr<FloorItemPrivate> dataPtr;
    };
    /// \}
  }
}

#endif
