QModelIndex ThumbnailModel::previousThumbnail(QModelIndex s) const {
QModelIndex i = s;
while(true) {
i = previousIndex(i);
if(!i.isValid()) break;
if(!i.data(IsDirRole).toBool()) return i;
}
return s;
}
int sum(Index lastIndex) const {
#ifdef USE_SIGNED_INDEX_TYPE
return lastIndex >= 0
? sums_.at(lastIndex) + sum(previousIndex(lastIndex) - 1)
: 0;
#else
int result = 0;
do {
result += sums_.at(lastIndex);
lastIndex = previousIndex(lastIndex);
if (lastIndex != 0) {
// here last index cannot be 1, so it cannot become 0 after
// decreasing it by 1
--lastIndex;
}
} while (lastIndex != 0);
return result;
#endif
}
// Takes O(vector size) time to perform
void initialize(std::vector<int> numbers) {
// Thanks to someone for this simple idea
std::partial_sum(numbers.begin(), numbers.end(), numbers.begin());
sums_.resize(numbers.size());
for (Index i = 0; i < size(); ++i) {
sums_[i] = numbers[i];
Index previousI = previousIndex(i);
if (previousI > 0) {
sums_[i] -= numbers[previousI - 1];
}
}
}
//______________________________________________
Animation::Pointer TabBarData::animation( const QPoint& position ) const {
if ( !enabled() ) return Animation::Pointer();
const QTabBar* local( qobject_cast<const QTabBar*>( target().data() ) );
if ( !local ) return Animation::Pointer();
int index( local->tabAt( position ) );
if ( index < 0 ) return Animation::Pointer();
else if ( index == currentIndex() ) return currentIndexAnimation();
else if ( index == previousIndex() ) return previousIndexAnimation();
else return Animation::Pointer();
}
//______________________________________________
qreal TabBarData::opacity( const QPoint& position ) const {
if ( !enabled() ) return OpacityInvalid;
const QTabBar* local( qobject_cast<const QTabBar*>( target().data() ) );
if ( !local ) return OpacityInvalid;
int index( local->tabAt( position ) );
if ( index < 0 ) return OpacityInvalid;
else if ( index == currentIndex() ) return currentOpacity();
else if ( index == previousIndex() ) return previousOpacity();
else return OpacityInvalid;
}
//______________________________________________
Animation::Pointer HeaderViewData::animation( const QPoint& position ) const
{
if( !enabled() ) return Animation::Pointer();
const QHeaderView* local( qobject_cast<const QHeaderView*>( target().data() ) );
if( !local ) return Animation::Pointer();
int index( local->logicalIndexAt( position ) );
if( index < 0 ) return Animation::Pointer();
else if( index == currentIndex() ) return currentIndexAnimation();
else if( index == previousIndex() ) return previousIndexAnimation();
else return Animation::Pointer();
}