void QQuickWheelArea::wheelEvent(QWheelEvent *we)
{
if (we->phase() == Qt::ScrollBegin)
setActive(true);
else if (we->phase() == Qt::ScrollEnd)
setActive(false);
QPoint numPixels = we->pixelDelta();
QPoint numDegrees = we->angleDelta() / 8;
if (!numPixels.isNull()) {
setHorizontalDelta(numPixels.x() * pixelDeltaAdjustment);
setVerticalDelta(numPixels.y() * pixelDeltaAdjustment);
} else if (!numDegrees.isNull()) {
setHorizontalDelta(numDegrees.x() / 15.0 * m_scrollSpeed);
setVerticalDelta(numDegrees.y() / 15.0 * m_scrollSpeed);
}
// This allows other parent WheelArea's to handle scrolling
// For example this allows for ScrollView inside of another ScrollView to work correctly
// Once this scrollbar can't scroll anymore, ie it reaches the limits,
// it will ignore the scroll event so the parent WheelArea can start scrolling
if ((numPixels.x() != 0 || numDegrees.x() != 0) &&
m_horizontalMinimumValue <= m_horizontalMaximumValue &&
(isAtXBeginning() || isAtXEnd())) {
we->ignore();
} else if ((numPixels.y() != 0 || numDegrees.y() != 0) &&
m_verticalMinimumValue <= m_verticalMaximumValue &&
(isAtYBeginning() || isAtYEnd())) {
we->ignore();
} else {
we->accept();
}
}
bool QWheelArea::event(QEvent *e)
{
switch (e->type()) {
case QEvent::GraphicsSceneWheel: {
QGraphicsSceneWheelEvent *we = static_cast<QGraphicsSceneWheelEvent *>(e);
if (we->orientation() == Qt::Vertical)
setVerticalDelta(we->delta());
else
setHorizontalDelta(we->delta());
return true;
}
case QEvent::Wheel: {
QWheelEvent *we = static_cast<QWheelEvent *>(e);
if (we->orientation() == Qt::Vertical)
setVerticalDelta(we->delta());
else
setHorizontalDelta(we->delta());
return true;
}
default:
break;
}
return QDeclarativeItem::event(e);
}
