QDesktopServices::openUrl() not working Qt

Question

This is my code:

QPixmap map(":/Medal.jpg");
QIcon ico(map);
ico.addPixmap(map);
QPushButton *p = new QPushButton;
p->setIcon(ico);
QString link = "http://www.google.com";
QObject::connect(p, SIGNAL(clicked()),window,SLOT(QDesktopServices::openUrl(QUrl (link))));

The pic is showing up but it is not opening the browser. Kindly help me out.

Answer 1

You have to use a lambda function:

#include <QApplication>
#include <QDesktopServices>
#include <QPushButton>
#include <QUrl>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QPushButton p("Click me");
    QString link = "http://www.google.com";
    QObject::connect(&p, &QPushButton::clicked, [&link](){
        QDesktopServices::openUrl(QUrl(link));
    });
    p.show();

    return a.exec();
}

or with std::bind()

#include <QApplication>
#include <QDesktopServices>
#include <QPushButton>
#include <QUrl>
#include <functional>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QPushButton p("Click me");
    QString link = "http://www.google.com";
    QObject::connect(&p, &QPushButton::clicked, std::bind(QDesktopServices::openUrl, QUrl(link)));
    p.show();

    return a.exec();
}

note:

you need to enable C++11 in Qt, for this review the following question: How to enable C++11 in Qt Creator?, which indicates that you add CONFIG += c++11 in your .pro