Creating a QMenu associated to a QPushButton

[ivanicy]

Hello!!

I am trying to associate a QMenu to a QPushButton, but I have a little problem. In this first case, it creates the menu correctly:

menuSettings = new QMenu(this);
    ui->settingsButton->setMenu(menuSettings);
    QFile settingsStyleFile(QCoreApplication::applicationDirPath() + "/menuSettingsStyle.css");
    settingsStyleFile.open(QIODevice::ReadOnly);
    QString style = QLatin1String(settingsStyleFile.readAll());
    menuSettings->setStyleSheet(style);
    menuSettings->addAction("Config CAMS");
    menuSettings->addAction("Alarms");
    menuSettings->addAction("Storage");
    menuSettings->addAction("Plano");
    menuSettings->addAction("Advance");
    menuSettings->addAction("Report");

    ui->settingsButton->setMenu(menuSettings);

But, when I try to give it functionality, the menu doesn't appear:

menuSettings = new QMenu(this);
ui->settingsButton->setMenu(menuSettings);
QFile settingsStyleFile(QCoreApplication::applicationDirPath() + "/menuSettingsStyle.css");
settingsStyleFile.open(QIODevice::ReadOnly);
QString style = QLatin1String(settingsStyleFile.readAll());
menuSettings->setStyleSheet(style);

QAction actionConfigCams("Config CAMS", ui->settingsButton);
connect (&actionConfigCams, SIGNAL(triggered()), this, SLOT(showConfigCamsTab()));
QAction actionAlarms("Alarms", ui->settingsButton);
connect (&actionAlarms, SIGNAL(triggered()), this, SLOT(showAlarmsTab()));
QAction actionStorage("Storage", ui->settingsButton);
connect (&actionStorage, SIGNAL(triggered()), this, SLOT(showStorageTab()));
QAction actionPlano("Plano", ui->settingsButton);
connect (&actionPlano, SIGNAL(triggered()), this, SLOT(showPlanoTab()));
QAction actionAdvance("Advance", ui->settingsButton);
connect (&actionAdvance, SIGNAL(triggered()), this, SLOT(showAdvanceTab()));
QAction actionReport("Report", ui->settingsButton);
connect (&actionReport, SIGNAL(triggered()), this, SLOT(showReportTab()));
menuSettings->addAction(&actionConfigCams);
menuSettings->addAction(&actionAlarms);
menuSettings->addAction(&actionStorage);
menuSettings->addAction(&actionPlano);
menuSettings->addAction(&actionAdvance);
menuSettings->addAction(&actionReport);

ui->settingsButton->setMenu(menuSettings);

Anybody knows how could be the problem?

Thank you very much!!

[VRonin]

Your QActions are on the stack and will die at the end of the constructor. allocate them with new

[mrjj]

hi
You create Action as local variables.
So unless they survive after the function ends
its pretty sure they not going to fire any signals.

Whenever you see an & in your connect
You must ask yourself
Will this object live long enough to later send any signals.

Not sure its that but since addAction expects a pointer its very likely it wont copy
the Action and hence u are giving it an object that is soon to die.

[ivanicy]

@VRonin @mrjj Thank you very much to both of you. It is working perfectly now!!