CODEWITHSUNDEEP
qtevents
Illia Levandovskyi
Illia Levandovskyi

Reputation: 1338

key press event in qt

I wonder is there any difference between Qt::ShiftModifier and Qt::Key_Shift? And what the difference between :

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

and

if(event->modifiers() == Qt::ShiftModifier){...}

Upvotes: 3

Views: 769

Answers (1)

cmannett85
cmannett85

Reputation: 22376

Qt::ShiftModifier comes from the Qt::KeyboardModifier enum with a value of 0x02. Qt::Key_Shift comes from the Qt::Key enum with a value of 0x01000020.

They're 'meaning' is the same, but they are used in different contexts.

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

Does the modifiers bitfield contain a shift? This is just a standard C/C++ bit operation.

if(event->modifiers() == Qt::ShiftModifier){...}

Does the modifier bitfield only contain a shift?

Upvotes: 4

Related Questions