Multiple keys

mohamaddanesh44

i want a multilpe key e.g. shift+a but i have a problem and i cant handle it.
here is a part of my code
could you help me?
thanks a lot

case Qt::Key_Shift:
if(event->modifiers().testFlag(Qt::ShiftModifier))
{
msg->setText("you pressed : shift + "+event1->text());
msg->exec();
}

Santosh Reddy

Qt::Key_Shift is key modifier and not a key by itself so comparing it in a switch case will not work, instead do somthing like this
@case Qt::Key_A:
if(event->modifiers().testFlag(Qt::ShiftModifier))
qDebug() << "Shift + A"
else
qDebug() << "A";@

mohamaddanesh44

it didnt work.
i want to handle all the buttons & multiple ones of keyboard.
i mean...i want to handle "a" , "shift+a" , "ctrl+a" , ect.
how can i handle it???

Code_ReaQtor

make a bitwise AND

@if (event->modifiers() & Qt::ShiftModifier) {
//do something
} else {
//do another thing
}@

Santosh Reddy

Here is an example.
@class KeySpy : public QObject
{
Q_OBJECT
public:
explicit KeySpy(QObject * = 0) { }

protected:
bool eventFilter(QObject *, QEvent * event);
};

bool KeySpy::eventFilter(QObject *, QEvent * event)
{
if(event->type() != QEvent::KeyPress)
return false;

QKeyEvent * keyEvent = static_cast<QKeyEvent *>(event);

int k = keyEvent->key();
char key_string = '?';

if((Qt::Key_0 <= k) && (k <= Qt::Key_9))
{
    key_string = k - Qt::Key_0 + '0';
}
else if((Qt::Key_A <= k) && (k <= Qt::Key_Z))
{
    key_string = k - Qt::Key_A + 'A';
}

QString key;
if(keyEvent->modifiers().testFlag(Qt::ShiftModifier))
{
    key = QString("Shitf + %1").arg(key_string);
}
else if(keyEvent->modifiers().testFlag(Qt::ControlModifier))
{
    key = QString("Ctrl + %1").arg(key_string);
}
else if(keyEvent->modifiers().testFlag(Qt::AltModifier))
{
    key = QString("Alt + %1").arg(key_string);
}
else
{
    key = QString("%1").arg(key_string);
}

qDebug() << key << keyEvent->text();

return false;

}@