[Moved] How to QGraphicsView receive keyPressEvent to active a QState

[kingnight]

in a QGraphicsView ,when a new key pressed ,how to connect this event to make QState jump from state1 to state2

i write a transition, crashed when begin to run :

DllMain DLL_PROCESS_DETACH
E:\Qt4test\AnimateHead-build-desktop\debug\AnimateHead.exe exited with code -1073741819

@class KeyPressTransition: public QSignalTransition
{
public:
KeyPressTransition(View *receiver, Qt::Key key)
: QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)
{
}

KeyPressTransition(View *receiver, Qt::Key key, QAbstractState *target)
    : QSignalTransition(receiver, SIGNAL(keyPressed(int))), m_key(key)
{
    setTargetState(target);
}

virtual bool eventTest(QEvent *e)
{
    if (QSignalTransition::eventTest(e)) {
        QVariant key = static_cast<QStateMachine::SignalEvent*>(e)->arguments().at(0);
        return (key.toInt() == int(m_key));
    }

    return false;
}

private:
Qt::Key m_key;
};

KeyPressTransition *t1=new KeyPressTransition(view,Qt::Key_Right,Rightstate1);
InitialState->addTransition(t1);

t1->addAnimation(new QPropertyAnimation(BiglocalItem, "pos"));
t1->addAnimation(new QPropertyAnimation(BigonlineItem, "pos"));
t1->addAnimation(new QPropertyAnimation(BigdownloadItem, "pos"));
t1->addAnimation(new QPropertyAnimation(BigneighborItem, "pos"));
t1->addAnimation(new QPropertyAnimation(BigsettingItem, "pos"));

t1->addAnimation(new QPropertyAnimation(BiglocalItem, "scale"));
t1->addAnimation(new QPropertyAnimation(BigonlineItem, "scale"));
t1->addAnimation(new QPropertyAnimation(BigdownloadItem, "scale"));
t1->addAnimation(new QPropertyAnimation(BigneighborItem, "scale"));
t1->addAnimation(new QPropertyAnimation(BigsettingItem, "scale"));@

[ngrosjean]

Hello,

Just a remark : on your QSignalTransition constructor, you give a "receiver" as first parameter. It should be the sender (http://doc.qt.nokia.com/4.6/qsignaltransition.html#QSignalTransition-2), isn't it?

[Franzk]

This really isn't the correct forum for these questions: "The purpose of this forum":http://developer.qt.nokia.com/forums/viewthread/264/