Show a QMenu in response to right click in a QLabel, possible?

Question

I'm thinking in show a QMenu in response to user click on a QLabel. So I tried:

menu.h

#ifndef MENU_H
#define MENU_H

#include <QMenu>

class Menu : public QMenu
{
    Q_OBJECT
public:
    explicit Menu(QWidget *parent = 0);

signals:

public slots:
};

#endif // MENU_H

menu.cpp

#include "menu.h"

Menu::Menu(QWidget *parent) :
    QMenu(parent)
{
    addAction("Action1");
}

And the code who would supposedly call show the menu:

QLabel *label = new QLabel("...");
m_menu = new Menu;
label->setContextMenuPolicy(Qt::CustomContextMenu);    
connect(label, &QLabel::customContextMenuRequested, m_menu, &Menu::activateWindow);

But it's not working. Where I'm wrong?

Answer 1

Try like this :

menu.h

#ifndef MENU_H
#define MENU_H

#include <QMenu>

class Menu : public QMenu
{
    Q_OBJECT
public:
    explicit Menu(QWidget *parent = 0);

signals:

public slots:
void showMenu(const QPoint &pos);
};

#endif // MENU_H

menu.cpp

#include "menu.h"

Menu::Menu(QWidget *parent) :
    QMenu(parent)
{
    addAction("Action1");
}
Menu::showMenu(const QPoint &pos)
{
    exec(mapToGlobal(pos));
}

And here your label :

QLabel *label = new QLabel("...");
m_menu = new Menu;
label->setContextMenuPolicy(Qt::CustomContextMenu);    
connect(label, SIGNAL(customContextMenuRequested(QPoint)), m_menu, SLOT(showMenu(QPoint)));