void KItemListViewAnimation::setScrollOffset(qreal offset) { const qreal diff = m_scrollOffset - offset; m_scrollOffset = offset; // The change of the offset requires that the position of all // animated QGraphicsWidgets get adjusted. An exception is made // for the delete animation that should just fade away on the // existing position. for (int type = 0; type < AnimationTypeCount; ++type) { if (type == DeleteAnimation) { continue; } QHashIterator<QGraphicsWidget*, QPropertyAnimation*> it(m_animation[type]); while (it.hasNext()) { it.next(); QGraphicsWidget* widget = it.key(); QPropertyAnimation* propertyAnim = it.value(); QPointF currentPos = widget->pos(); if (m_scrollOrientation == Qt::Vertical) { currentPos.ry() += diff; } else { currentPos.rx() += diff; } if (type == MovingAnimation) { // Stop the animation, calculate the moved start- and end-value // and restart the animation for the remaining duration. const int remainingDuration = propertyAnim->duration() - propertyAnim->currentTime(); const bool block = propertyAnim->signalsBlocked(); propertyAnim->blockSignals(true); propertyAnim->stop(); QPointF endPos = propertyAnim->endValue().toPointF(); if (m_scrollOrientation == Qt::Vertical) { endPos.ry() += diff; } else { endPos.rx() += diff; } propertyAnim->setDuration(remainingDuration); propertyAnim->setStartValue(currentPos); propertyAnim->setEndValue(endPos); propertyAnim->start(); propertyAnim->blockSignals(block); } else { widget->setPos(currentPos); } } } }