Technical facts

./CppQtDisplayPosItem/CppQtDisplayPosItem.pri


INCLUDEPATH += \

    ../../Classes/CppQtDisplayPosItem



SOURCES += \

    ../../Classes/CppQtDisplayPosItem/qtdisplaypositem.cpp



HEADERS  += \

    ../../Classes/CppQtDisplayPosItem/qtdisplaypositem.h



OTHER_FILES += \

    ../../Classes/CppQtDisplayPosItem/Licence.txt

./CppQtDisplayPosItem/qtdisplaypositem.h


//---------------------------------------------------------------------------

/*

QtDisplayPosItem, QGraphicsItem that displays its position

Copyright (C) 2012-2015 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.If not, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppQtDisplayPosItem.htm

//---------------------------------------------------------------------------

#ifndef QTDISPLAYPOSITEM_H

#define QTDISPLAYPOSITEM_H



#include <string>

#include <vector>



#pragma GCC diagnostic push

#pragma GCC diagnostic ignored "-Weffc++"

#pragma GCC diagnostic ignored "-Wunused-local-typedefs"

#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"

#include <boost/signals2.hpp>

#include <QGraphicsSimpleTextItem>

#pragma GCC diagnostic pop



namespace ribi {



///A text item that displays its coordinats

struct QtDisplayPosItem : public QGraphicsSimpleTextItem

{

  typedef QtDisplayPosItem This_t;



  QtDisplayPosItem(QGraphicsItem *parent = 0);



  ///Obtain the version of this class

  static std::string GetVersion() noexcept;



  ///Obtain the version history of this class

  static std::vector<std::string> GetVersionHistory() noexcept;



  ///Signal to request a scene update, because this item has moved/changed

  boost::signals2::signal<void ()> m_signal_request_scene_update;



protected:

  void mouseMoveEvent(QGraphicsSceneMouseEvent *event);

  void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

};



} //~namespace ribi



#endif // QTDISPLAYPOSITEM_H

./CppQtDisplayPosItem/qtdisplaypositem.cpp


//---------------------------------------------------------------------------

/*

QtDisplayPosItem, QGraphicsItem that displays its position

Copyright (C) 2012-2015 Richel Bilderbeek



This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.



This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.If not, see <http://www.gnu.org/licenses/>.

*/

//---------------------------------------------------------------------------

//From http://www.richelbilderbeek.nl/CppQtDisplayPosItem.htm

//---------------------------------------------------------------------------

#pragma GCC diagnostic push

#pragma GCC diagnostic ignored "-Weffc++"

#pragma GCC diagnostic ignored "-Wunused-local-typedefs"

#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"

#include "qtdisplaypositem.h"



#include <cassert>

#include <sstream>

//#include <QGraphicsScene>



#pragma GCC diagnostic pop



ribi::QtDisplayPosItem::QtDisplayPosItem(QGraphicsItem *parent)

 : QGraphicsSimpleTextItem(parent),

   m_signal_request_scene_update{}

{

  this->setFlags(

      QGraphicsItem::ItemIsFocusable

    | QGraphicsItem::ItemIsMovable

    | QGraphicsItem::ItemIsSelectable);

  this->update();

}



std::string ribi::QtDisplayPosItem::GetVersion() noexcept

{

  return "1.1";

}



std::vector<std::string> ribi::QtDisplayPosItem::GetVersionHistory() noexcept

{

  std::vector<std::string> v;

  v.push_back("2012-12-19: version 1.0: initial version");

  v.push_back("2013-07-25: version 1.1: transition to Qt5");

  return v;

}





#pragma GCC diagnostic push

#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"

void ribi::QtDisplayPosItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)

{

  m_signal_request_scene_update();

  QGraphicsSimpleTextItem::mouseMoveEvent(event);

}

#pragma GCC diagnostic pop



void ribi::QtDisplayPosItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

  std::stringstream s;

  s << "(" << static_cast<int>(this->pos().x()) << "," << static_cast<int>(this->pos().y()) << ")";

  this->setText(s.str().c_str());

  QGraphicsSimpleTextItem::paint(painter,option,widget);

}

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(C++) QtDisplayPosItem

Technical facts

./CppQtDisplayPosItem/CppQtDisplayPosItem.pri

./CppQtDisplayPosItem/qtdisplaypositem.h

./CppQtDisplayPosItem/qtdisplaypositem.cpp