Different default button design behaviour - c++

Question

The problem is the following: I want to redefine (get rid of hovering effect of the button) the default Qt button style's behaviour. I only need 1 and 3 as shown on the picture under. The 2nd look comes when the button is focused.
Hovering effect: appears when you hover the button; remains painted when you press the button and move the cursor outside the space of the button.
What I've tried:
Redefining the events:
How do I implement QHoverEvent in Qt?
Here I simply redefined some of the events like Move, Hover etc. and made them non-functional.
Example Code:
class TestButton : public QToolButton
{
Q_OBJECT
public:
TestButton (QWidget *parent = 0) :
QToolButton(parent)
{}
bool event(QEvent * e)
{
this->clearFocus();
this->clearMask();
switch (e->type())
{
case QEvent::GraphicsSceneHoverEnter:
case QEvent::GraphicsSceneHoverLeave:
case QEvent::GraphicsSceneHoverMove:
case QEvent::HoverEnter:
case QEvent::HoverLeave:
case QEvent::HoverMove:
return true;
default:
return QWidget::event(e);
}
}
};
Some minor hacks:
btn->setFocusPolicy(Qt::NoFocus);

Answer 1

If you accept only HoverEnter events then after releasing the button the hover effect will go off as soon as you move mouse away. So you need to pretend moving mouse away by sending a corresponding event.
bool event(QEvent * e)
{
switch (e->type()) {
case QEvent::HoverEnter:
return true;
case QEvent::MouseButtonRelease: {
QEvent event(QEvent::Leave);
QApplication::sendEvent(this, &event);
}
default:
return QWidget::event(e);
}
}