/**
  * @RDE_HEADER@
  * Declaration/Definition
  * $Id$
  * $HeadURL$
  * $Author$
  */


#include <QtWidgets/QApplication>
#include <QtWidgets/QGraphicsScene>
#include <QtWidgets/QGraphicsView>
#include <QtWidgets/QGraphicsProxyWidget>
#include <QtWidgets/QMessageBox>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QTextEdit>
#include <QtWidgets/QHBoxLayout>

class View : public QGraphicsView
{
  private:

    QPushButton                            * m_button;
    QPushButton                            * m_reset;
    QTextEdit                              * m_console;

  public:

    View(QGraphicsScene * scene, QTextEdit * console, QWidget * parent = nullptr) : QGraphicsView(scene, parent), m_console(console)
    {
      setFixedSize( 600, 400 );

      QGraphicsProxyWidget * widgetProxy;

      m_reset     = new QPushButton( "Reset", nullptr );  // button must be toplevel widget
      widgetProxy = scene->addWidget( m_reset );
      widgetProxy -> setPos( this->mapToScene(150,100) );

      connect(m_reset, &QPushButton::clicked, this, [this]()
      {
        this->m_console->append("Reset cursor.\n");
        this->viewport()->setCursor( Qt::CursorShape::CrossCursor );
      });

      m_button    = new QPushButton( "Touch or Click me \n to change cursor.", nullptr );  // button must be toplevel widget
      widgetProxy = scene->addWidget( m_button );
      widgetProxy -> setPos( this->mapToScene(250,200) );

      connect(m_button, &QPushButton::clicked, this, [this]()
      {
        this->m_console->append("Button has been clicked --> cursor shape changed to cross cursor.\n");
        this->viewport()->setCursor( Qt::CursorShape::CrossCursor );
        update();
      });

      connect(m_button, &QPushButton::pressed, this, [this]()
      {
        this->m_console->append("Button has been pressed.\n");
      });

      this->viewport()->setCursor( Qt::CursorShape::PointingHandCursor );

    } // View( QGraphicsScene * scene, QWidget * parent = nullptr )

}; // class View


int main (int argc, char* argv[])
{
  QApplication app ( argc, argv );

  QApplication::setApplicationName("QGraphicsView Touch Test");

  QGraphicsScene   scene;
  QWidget          top;
  QHBoxLayout    * layout  = new QHBoxLayout( &top );
  QTextEdit      * console = new QTextEdit( &top );
  View           * view    = new View( &scene, console, &top );

  layout->addWidget( view );
  layout->addWidget( console );

  top.show();

  return app.exec();
} // main (int argc, char* argv[])