SegmentItem.hh

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/*
 * Copyright (C) 2014-2016 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_SEGMENTITEM_HH_
#define _GAZEBO_GUI_BUILDING_SEGMENTITEM_HH_

#include <memory>
#include <vector>
#include <ignition/math/Vector2.hh>
#include <ignition/math/Vector3.hh>

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

#include "gazebo/util/system.hh"

namespace gazebo
{
  namespace gui
  {
    class GrabberHandle;

    // Forward declare private data.
    class SegmentItemPrivate;


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

      public: ~SegmentItem();

      public: void SetLine(const ignition::math::Vector2d &_start,
          const ignition::math::Vector2d &_end);

      public: void SetStartPoint(const ignition::math::Vector2d &_start);

      public: ignition::math::Vector2d StartPoint() const;

      public: void SetEndPoint(const ignition::math::Vector2d &_end);

      public: ignition::math::Vector2d EndPoint() const;

      public: void SetThickness(const double _thickness);

      public: double Thickness() const;

      public: double Scale() const;

      public: void SetScale(const double _scale);

      public: void SetColor(const common::Color &_color);

      public: void ShowHandles(const bool _show);

      public: void SegmentChanged();

      // Documentation Inherited
      public: ignition::math::Vector3d Size() const;

      // Documentation Inherited
      public: ignition::math::Vector3d ScenePosition() const;

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

      public: std::vector<GrabberHandle *>Grabbers() const;

      protected: virtual void SegmentUpdated();

      protected: void UpdateLinkedGrabbers(GrabberHandle *_grabber,
          const ignition::math::Vector2d &_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: static const double SnapAngle;

      public: static const double SnapLength;

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

      private: std::unique_ptr<SegmentItemPrivate> dataPtr;
    };
  }
}

#endif