Checking for letters pressed when mouse is pressed

LancelotPops

Hi everyone !

I'm developing an application using Qt in C++.

When there is a mouse click, I would like to check if there are letters pressed on the keyboard. So far, I found solutions when the keys pressed are specific ones like Shift, Control .. but not when a letter is pressed.

Do you have any advice for me ?

PS: Sorry if this topic isn't in the right category, I wasn't sure where to post it.

Thank you !

Sandra

Eligijus

Combine

virtual void	mousePressEvent(QMouseEvent * event)

and

virtual void	keyPressEvent(QKeyEvent * event)

Eddy

Hi @LancelotPops ,

welcome to the Qt forum.

Did you have a look at queryKeyboardModifiers ?

LancelotPops

Indeed, my application is a QSlicerApplication (I'm developing a module in 3DSlicer) and I'm not sure I can use exactly the same solutions as if I were only working with Qt.

I tried this :

when leftButtonPressEvent :

Qt::KeyboardModifiers modifier = qSlicerApplication::application()->keyboardModifiers();
     if (QApplication::keyboardModifiers().testFlag(Qt::ShiftModifier) == true) {
        std::cout << "shift pressed" << std::endl;
     }

This works very well ... but it only works for specific keys (Control, Shift ..), is there something like that but working for letters pressed ?

Eddy

Hi,

this topic may be of interest to determine the keys.

Hope it helps,

Eddy

SGaist

Hi and welcome to devnet,

Can you explain why do you need to know whether a letter is currently pressed ?

A long press on such a key usually triggers the auto-repeat of the system so it might make things a bit more difficult.