void FlatProxyModel::removeSubTree(const QModelIndex &source_idx, bool emitRemove)
{
SourceItem *sourceItem = sourceToInternal(source_idx);
if (!sourceItem)
return;
SourceItem *prevItem = sourceItem->parent();
if (sourceItem->sourceRow() > 0) {
prevItem = prevItem->child(sourceItem->sourceRow() - 1);
while (prevItem->childCount() > 0) {
prevItem = prevItem->child(prevItem->childCount() - 1);
}
}
SourceItem *lastItem = sourceItem;
while (lastItem->childCount() > 0) {
lastItem = lastItem->child(lastItem->childCount() - 1);
}
if (emitRemove)
beginRemoveRows(QModelIndex(), sourceItem->pos(), lastItem->pos());
int nextPos = 0;
if (prevItem) {
prevItem->setNext(lastItem->next());
nextPos = prevItem->pos() + 1;
}
SourceItem *nextItem = lastItem->next();
while (nextItem) {
nextItem->setPos(nextPos);
nextPos++;
nextItem = nextItem->next();
}
sourceItem->parent()->removeChild(sourceItem);
delete sourceItem;
if (emitRemove)
endRemoveRows();
}
QItemSelection FlatProxyModel::mapSelectionToSource(const QItemSelection &proxySelection) const
{
QItemSelection sourceSelection;
for (int i = 0; i < proxySelection.count(); i++) {
const QItemSelectionRange &range = proxySelection[i];
SourceItem *topLeftItem = 0;
SourceItem *bottomRightItem = 0;
SourceItem *currentItem = static_cast<SourceItem *>(range.topLeft().internalPointer());
int row = range.topLeft().row();
int left = range.topLeft().column();
int right = range.bottomRight().column();
while (currentItem && row <= range.bottomRight().row()) {
Q_ASSERT(currentItem->pos() == row);
if (!topLeftItem)
topLeftItem = currentItem;
if (currentItem->parent() == topLeftItem->parent()) {
bottomRightItem = currentItem;
}
else {
Q_ASSERT(topLeftItem && bottomRightItem);
sourceSelection << QItemSelectionRange(mapToSource(createIndex(topLeftItem->pos(), left, topLeftItem)), mapToSource(createIndex(bottomRightItem->pos(), right, bottomRightItem)));
topLeftItem = 0;
bottomRightItem = 0;
}
// update loop vars
currentItem = currentItem->next();
row++;
}
if (topLeftItem && bottomRightItem) { // there should be one range left.
sourceSelection << QItemSelectionRange(mapToSource(createIndex(topLeftItem->pos(), left, topLeftItem)), mapToSource(createIndex(bottomRightItem->pos(), right, bottomRightItem)));
}
}
return sourceSelection;
}
void FlatProxyModel::insertSubTree(const QModelIndex &source_idx, bool emitInsert)
{
SourceItem *newSubTree = new SourceItem(source_idx.row(), sourceToInternal(sourceModel()->parent(source_idx)));
if (newSubTree->parent()) {
newSubTree->setPos(newSubTree->parent()->pos() + source_idx.row() + 1);
}
SourceItem *lastItem = insertSubTreeHelper(newSubTree, newSubTree, source_idx);
Q_ASSERT(lastItem);
Q_ASSERT(lastItem->next() == 0);
if (emitInsert)
beginInsertRows(QModelIndex(), newSubTree->pos(), lastItem->pos());
if (newSubTree->parent()) {
if (newSubTree->parent()->childCount() > source_idx.row()) {
SourceItem *next = newSubTree->parent()->child(source_idx.row());
lastItem->setNext(next);
int nextPos = lastItem->pos() + 1;
while (next) {
next->setPos(nextPos);
next = next->next();
nextPos++;
}
}
if (source_idx.row() > 0) {
SourceItem *previous = newSubTree->parent()->child(source_idx.row() - 1);
while (previous->childCount() > 0) {
previous = previous->child(previous->childCount() - 1);
}
previous->setNext(newSubTree);
}
else {
newSubTree->parent()->setNext(newSubTree);
}
}
else {
_rootSourceItem = newSubTree;
}
if (emitInsert)
endInsertRows();
}