KeyPress and KeyRelease Events

[sattu]

Hi Everyone,

To see how various keys behave in the context of Qt when pressed and released, I added 2 VIRTUAL FUNCTIONS to my MainWindow Class and implemented them in the following way:

void MainWindow::keyPressEvent ( QKeyEvent * event )
{
    qDebug("Came here,,,, Key Pressed");
}
 
void MainWindow::keyReleaseEvent(QKeyEvent *event)
{
qDebug("Came here,,,, Key Released");
}

void MainWindow::keyPressEvent ( QKeyEvent * event )
{
    qDebug("Came here,,,, Key Pressed");
}

void MainWindow::keyReleaseEvent(QKeyEvent *event)
{
qDebug("Came here,,,, Key Released");
}

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What I observed is that, whenever I pressed any key, I would get both the qDebug statements as expected. But in the case of following four keys, I get only the qDebug of the keyReleaseEvent method:

Tab key, LeftArrow key, RightArrow key, SpaceBar

That means, for these keys only release event happens. I am really confused . Can anyone please explain why it is so?


With Regards,
Sattu