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c++qtqgraphicsviewqgraphicsscene

Moving object using keyboard qt

I'm trying to move an object using my arrow keys, but when I launch the app, nothing happens. Do you have an idea on how to fix it ?

@Update : my rectangle only moves once to the left and to the right, but if I use qDebug it recognizes all the times I click left or right, any ideas ?

void MouvementJoueur::keyPressEvent(QKeyEvent *e)
{
switch ( e->key() )
    {
    case Qt::Key_Left:
        rectangle->setPos(x()-10,y());
        qDebug() << "You pressed the Key left";
        break;
    case Qt::Key_Right:
        rectangle->setPos(x()+10,y());
        qDebug() << "You pressed the Key right";
        break;
    }
 }

Thank you in advance !

Solution

  • Your issue seems to be, that you take position of the parent, and set position of rectangle based on that. This is probably not what you want to do with key presses here. You should set the position like this:

    rectangle->setPos(rectangle->x() - 10, rectangle->y());