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QScrollBar: clean up wheelEvent() implementation 

This code was moved from the general event() handler.
Remove comments and casting that were necessary there.

Task-number: QTBUG-27308
Reported-by: chenjiexin
Task-number: QTBUG-21534
Reported-by: Martin Koller
Change-Id: I14ef4c6363002032895f6840a7c68c1f5f665384
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
bb10
Marc Mutz 2012-09-25 10:56:40 +02:00 committed by The Qt Project
parent aec5b76b51
commit 9b439161ac
1 changed files with 12 additions and 14 deletions
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26
src/widgets/widgets/qscrollbar.cpp
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@ -488,20 +488,18 @@ bool QScrollBar::event(QEvent *event)
#ifndef QT_NO_WHEELEVENT
void QScrollBar::wheelEvent(QWheelEvent *event)
{
event->ignore();
// override wheel event without adding virtual function override
QWheelEvent *ev = static_cast<QWheelEvent *>(event);
int delta = ev->delta();
// scrollbar is a special case - in vertical mode it reaches minimum
// value in the upper position, however QSlider's minimum value is on
// the bottom. So we need to invert a value, but since the scrollbar is
// inverted by default, we need to inverse the delta value for the
// horizontal orientation.
if (ev->orientation() == Qt::Horizontal)
delta = -delta;
Q_D(QScrollBar);
if (d->scrollByDelta(ev->orientation(), ev->modifiers(), delta))
event->accept();
event->ignore();
int delta = event->delta();
// scrollbar is a special case - in vertical mode it reaches minimum
// value in the upper position, however QSlider's minimum value is on
// the bottom. So we need to invert a value, but since the scrollbar is
// inverted by default, we need to inverse the delta value for the
// horizontal orientation.
if (event->orientation() == Qt::Horizontal)
delta = -delta;
Q_D(QScrollBar);
if (d->scrollByDelta(event->orientation(), event->modifiers(), delta))
event->accept();
}
#endif