SegmentItem.hh

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/*
 * Copyright (C) 2014-2015 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 _SEGMENT_ITEM_HH_
#define _SEGMENT_ITEM_HH_

#include <vector>
#include "gazebo/gui/qt.h"
#include "gazebo/gui/building/EditorItem.hh"
#include "gazebo/util/system.hh"

namespace gazebo
{
  namespace gui
  {
    class GrabberHandle;
    class EditorItem;


    class GAZEBO_VISIBLE SegmentItem
      : public EditorItem, public QGraphicsLineItem
    {
      public: SegmentItem(QGraphicsItem *_parent = 0);

      public: ~SegmentItem();

      public: void SetLine(const QPointF &_start, const QPointF &_end);

      public: void SetStartPoint(const QPointF &_start);

      public: QPointF GetStartPoint() const;

      public: void SetEndPoint(const QPointF &_end);

      public: QPointF GetEndPoint() const;

      public: void SetThickness(double _thickness);

      public: double GetThickness() const;

      public: double GetScale() const;

      public: void SetScale(double _scale);

      public: void SetColor(QColor _color);

      public: void ShowHandles(bool _show);

      public: void SegmentChanged();

      // Documentation Inherited
      public: QVector3D GetSize() const;

      // Documentation Inherited
      public: QVector3D GetScenePosition() const;

      // Documentation Inherited
      public: double GetSceneRotation() const;

      protected: virtual void SegmentUpdated();

      protected: void UpdateLinkedGrabbers(GrabberHandle *_grabber,
          const QPointF &_pos);

      private: bool sceneEventFilter(QGraphicsItem *watched,
          QEvent *_event);

      private: bool GrabberEventFilter(GrabberHandle *_grabber,
          QEvent *_event);

      private: void hoverEnterEvent(QGraphicsSceneHoverEvent *_event);

      private: void hoverMoveEvent(QGraphicsSceneHoverEvent *_event);

      private: void hoverLeaveEvent(QGraphicsSceneHoverEvent *_event);

      private: void mouseMoveEvent(QGraphicsSceneMouseEvent *_event);

      private: void mousePressEvent(QGraphicsSceneMouseEvent *_event);

      private: void mouseReleaseEvent(QGraphicsSceneMouseEvent *_event);

      private: void paint(QPainter *_painter,
          const QStyleOptionGraphicsItem *_option, QWidget *_widget);

      public: std::vector<GrabberHandle *> grabbers;

      public: static const double SnapAngle;

      public: static const double SnapLength;

      private: QPointF start;

      private: QPointF end;

      private: QPointF segmentMouseMove;

      private: double thickness;

      private: double grabberWidth;

      private: double grabberHeight;
    };
  }
}

#endif