Program Listing for File turtle_frame.hpp

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// Copyright (c) 2009, Willow Garage, Inc.
//
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// modification, are permitted provided that the following conditions are met:
//
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//      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.
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//    * Neither the name of the Willow Garage nor the names of its
//      contributors may be used to endorse or promote products derived from
//      this software without specific prior written permission.
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#ifndef TURTLESIM__TURTLE_FRAME_HPP_
#define TURTLESIM__TURTLE_FRAME_HPP_

#ifndef Q_MOC_RUN  // See: https://bugreports.qt-project.org/browse/QTBUG-22829
#include "turtle.hpp"  // NO LINT
#endif

#include <QFrame>
#include <QImage>
#include <QPainter>
#include <QPaintEvent>
#include <QTimer>
#include <QVector>

// This prevents a MOC error with versions of boost >= 1.48
#ifndef Q_MOC_RUN  // See: https://bugreports.qt-project.org/browse/QTBUG-22829
#include <map>
#include <string>
#include <rclcpp/rclcpp.hpp>
#include <ament_index_cpp/get_package_share_directory.hpp>

#include <rcl_interfaces/msg/parameter_event.hpp>
#include <std_srvs/srv/empty.hpp>
#include <turtlesim/srv/spawn.hpp>
#include <turtlesim/srv/kill.hpp>
#endif

namespace turtlesim
{
class TurtleFrame : public QFrame
{
  Q_OBJECT

public:
  TurtleFrame(
    rclcpp::Node::SharedPtr & node_handle, QWidget * parent = 0,
    Qt::WindowFlags f = Qt::WindowFlags());
  ~TurtleFrame();

  std::string spawnTurtle(const std::string & name, float x, float y, float angle);
  std::string spawnTurtle(const std::string & name, float x, float y, float angle, size_t index);

protected:
  void paintEvent(QPaintEvent * event);

private slots:
  void onUpdate();

private:
  void updateTurtles();
  void clear();
  bool hasTurtle(const std::string & name);

  bool clearCallback(
    const std_srvs::srv::Empty::Request::SharedPtr,
    std_srvs::srv::Empty::Response::SharedPtr);
  bool resetCallback(
    const std_srvs::srv::Empty::Request::SharedPtr,
    std_srvs::srv::Empty::Response::SharedPtr);
  bool spawnCallback(
    const turtlesim::srv::Spawn::Request::SharedPtr,
    turtlesim::srv::Spawn::Response::SharedPtr);
  bool killCallback(
    const turtlesim::srv::Kill::Request::SharedPtr,
    turtlesim::srv::Kill::Response::SharedPtr);

  void parameterEventCallback(const rcl_interfaces::msg::ParameterEvent::ConstSharedPtr);

  rclcpp::Node::SharedPtr nh_;

  QTimer * update_timer_;
  QImage path_image_;
  QPainter path_painter_;

  uint64_t frame_count_;

  rclcpp::Time last_turtle_update_;

  rclcpp::Service<std_srvs::srv::Empty>::SharedPtr clear_srv_;
  rclcpp::Service<std_srvs::srv::Empty>::SharedPtr reset_srv_;
  rclcpp::Service<turtlesim::srv::Spawn>::SharedPtr spawn_srv_;
  rclcpp::Service<turtlesim::srv::Kill>::SharedPtr kill_srv_;
  rclcpp::Subscription<rcl_interfaces::msg::ParameterEvent>::SharedPtr parameter_event_sub_;

  typedef std::map<std::string, TurtlePtr> M_Turtle;
  M_Turtle turtles_;
  uint32_t id_counter_;

  QVector<QImage> turtle_images_;

  float meter_;
  float width_in_meters_;
  float height_in_meters_;
};
}  // namespace turtlesim
#endif  // TURTLESIM__TURTLE_FRAME_HPP_