Qt - custom context menu

mywidget.cpp

#include <QMenu>
#include <QAction>

MyWidget::MyWidget(QWidget* parent) : QWidget(parent)
{
  setContextMenuPolicy(Qt::CustomContextMenu);
  connect(this, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(customContextMenuShow(QPoint)));
}

void MyWidget::customContextMenuShow(const QPoint& pos)
{
  QPoint globalPos = mapToGlobal(pos);
  QMenu menu;
  
  QAction* action_firstAction = menu.addAction(
          QIcon(),
          QString("First action")
  );
  menu.addSeparator();
  QAction* action_secondAction = menu.addAction(
          QIcon(),
          QString("Second action")
  );
  
  QAction* selected_action = menu.exec(globalPos);
  if(selected_action) {
    if(selected_action == action_firstAction)
    {
      // do something for first action
    }
    else if(selected_action == action_secondAction)
    {
      // do something for second action
    }
  }
}

mywidget.h

#ifndef MYWIDGET_H
#define MYWIDGET_H

#include <QWidget>

class MyWidget : public QWidget
{
  Q_OBJECT
public:
  explicit MyWidget(QWidget* parent = 0);
  
public slots:
  void customContextMenuShow(const QPoint& pos);
};

#endif // MYWIDGET_H