Qt - open dialog when action triggered multiple times

Question

I want a notice dialog to come up when an action has been triggered multiple times consecutively (so basically a bit like how StickyKeys is enabled). I understand that I can basically do connect(this->trigger, SIGNAL(triggered()), this, SLOT(onTrigger())) for detecting a single trigger, but how could I detect when it happens 10 times?

Thanks.

P.S - how could I do a "don't show this message again" QCheckBox?

vahancho · Answer 1 · 2014-05-05T08:14:34.920

3

You can implement your slot in the following way:

void MyClass::onTrigger()
{
    static int count = 0;
    if (count++ == 10) {
        // show the dialog here
    }
}

edited May 05 '14 at 08:14

answered May 05 '14 at 08:07

vahancho

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I think you are missing the return type from the signature. – László Papp May 05 '14 at 08:13
Please reset counter. – user2672165 May 05 '14 at 09:03
@user2672165, I don't see requirement to show dialog on **each** 10 clicks or so. – vahancho May 05 '14 at 09:06
I would be careful about using static variables in class methods. They are shared across all instances of that class. – awerries Sep 21 '16 at 22:23

László Papp · Answer 2 · 2014-05-05T08:31:22.947

You would need an external counter for this as the connect method, or QObject cannot do this for you out-of-box. I would write this:

MyClass::MyClass(QObject *parent) : QObject(parent), m_cnt(0)
{
    ...
    // Removed the needless this usage
    connect(trigger, SIGNAL(triggered()), SLOT(onTrigger()));
    ...
}

void MyClass::onTrigger()
{
    if (m_cnt++ == 10) {
        m_dialog.show();
        // or: m_dialog.exec();
    }
}

Qt - open dialog when action triggered multiple times

2 Answers2