How to install and handle the event filter to Qt graphicsview

I have a gra开发者_运维技巧phicsview and a graphicsscen, but I don't know how to install and handle the event filter for getting the keyboard events. Can anyone help me with that?

Thanks in advance.

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If you have created custom QGraphicsScene class you can just override QWidget's "QWidget::keyPressEvent()" and "QWidget::keyReleaseEvent()" methods.

class MyGraphicsScene : QGraphicsScene
{
    void keyPressEvent(QKeyEvent *event);
}

//in cpp
void MyGraphicsScene::keyPressEvent(QKeyEvent *event)
{
    // do sth with event
}

If you are just using an istance of QGraphicsScene, you can use parent's keyPressEvent. Whether or not you must give more details

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You have two options to do that:

1) Create your own class based on QGraphicsView and override keyPressEvent(). That only has sense if you going to change a lot of other things.

2) Install event filter, using installEventFilter(..) method and pass there filter object which will receive everything you might need