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Editorial Team
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Asked: 2026-05-26T18:09:22+00:00

I am new to Qt and stumbled across a problem that I could not

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I am new to Qt and stumbled across a problem that I could not find an answer for on Google.

Say I want to send an acceleration and velocity field. I define a custom signal :

setProperties(QString,double,double,bool)

However, how do I tell the difference between velocity and acceleration in such a statement?

connect(dialog, SIGNAL(setProperties(QString,double,double,bool)),
        this, SLOT(somerandomslot()));

randomslot needs to get the velocity field and acceleration fields and manipulate them, but in the above SIGNAL they are just double.

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1 Answer

  1. Editorial Team

    In this case your somerandomslot() function should probably have a matching function signature so that the values emited in your signal can get passed to it:

    void somerandomslot( const QString &foo, double a, double v, bool bar );

    then your connect call would look like this:

    connect(dialog, SIGNAL(setProperties(QString,double,double,bool)), this, SLOT(somerandomslot(QString, double, double, bool)));

    and when your somerandomslot() gets called you’ll have access to those variables.

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