how to catch key combination inside keyPressEvent.

[jpn]

As I said, you can do it with the numpad only. And you will have to change the if-statement because Qt::KeypadModifier will be active as well:

if (event->modifiers() & Qt::ShiftModifier)
    ...

if (event->modifiers() & Qt::ShiftModifier)
    ...

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[babu198649]

thanks jpn it works,
is there any advantage in using bitwise AND operator in preference to == operator(although both works). How does the bitwise AND operator works here(ie. logic ) .