void KTabBar::wheelEvent( QWheelEvent *event )
{
if ( !( event->orientation() == Qt::Horizontal ) ) {
if ( receivers( SIGNAL(wheelDelta(int)) ) ) {
emit( wheelDelta( event->delta() ) );
return;
}
int lastIndex = count() - 1;
//Set an invalid index as base case
int targetIndex = -1;
bool forward = event->delta() < 0;
if ( forward && lastIndex == currentIndex() ) {
targetIndex = 0;
}
else if ( !forward && 0 == currentIndex() ) {
targetIndex = lastIndex;
}
//Will not move when targetIndex is invalid
setCurrentIndex( targetIndex );
//If it has not moved yet (targetIndex == -1), or if it moved but current tab is disabled
if ( targetIndex != currentIndex() || !isTabEnabled( targetIndex ) ) {
QTabBar::wheelEvent( event );
}
event->accept();
} else {
LRESULT WebPopupMenuProxyWin::onMouseWheel(HWND hWnd, UINT message, WPARAM wParam, LPARAM, bool& handled)
{
handled = true;
if (!scrollbar())
return 0;
int i = 0;
for (incrementWheelDelta(GET_WHEEL_DELTA_WPARAM(wParam)); abs(wheelDelta()) >= WHEEL_DELTA; reduceWheelDelta(WHEEL_DELTA)) {
if (wheelDelta() > 0)
++i;
else
--i;
}
ScrollableArea::scroll(i > 0 ? ScrollUp : ScrollDown, ScrollByLine, abs(i));
return 0;
}