本文整理汇总了C++中ListItem::insertChild方法的典型用法代码示例。如果您正苦于以下问题：C++ ListItem::insertChild方法的具体用法？C++ ListItem::insertChild怎么用？C++ ListItem::insertChild使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ListItem的用法示例。
在下文中一共展示了ListItem::insertChild方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: _appendAfter
QModelIndex ListModel::_appendAfter(ListItem* item, const QString& content, App::AppendMode mode)
{
SqlQuery sql;
ListItem* parent = item->parent();
if (!parent)
return QModelIndex(); // cannot append after the root
int row = mode == App::AppendAfter ? item->row() + 1 : item->row();
sql.prepare("UPDATE list_item SET weight = weight + 1 WHERE list_id = :list AND parent_id = :parent AND weight >= :weight");
sql.bindValue(":list", _listId);
sql.bindValue(":parent", parent->id());
sql.bindValue(":weight", row);
if (!sql.exec())
return QModelIndex();
sql.prepare("INSERT INTO list_item (list_id, parent_id, weight, content, created_at) VALUES (:list, :parent, :weight, :content, CURRENT_TIMESTAMP)");
sql.bindValue(":list", _listId);
sql.bindValue(":parent", parent->id());
sql.bindValue(":weight", row);
sql.bindValue(":content", content);
if (!sql.exec())
return QModelIndex();
int id = sql.lastInsertId().toInt();
beginInsertRows(indexFromItem(parent), row, row);
ListItem* newItem = new ListItem(_listId, id, content);
parent->insertChild(row, newItem);
if (isNewItemCheckable(item->parent(), row))
newItem->setCheckable(true);
endInsertRows();
return indexFromItem(newItem);
}示例2: moveItemHorizontal
QModelIndex ListModel::moveItemHorizontal(const QModelIndex& index, int direction)
{
ListItem* item = itemFromIndex(index);
if (!item)
return index;
ListItem* parent = item->parent();
int row = item->row();
if (direction == App::Left) { // reparent as child of parent's parent
if (!parent || parent->isRoot()) // already top level item
return index;
ListItem* newParent = parent->parent();
int newRow = parent->row() + 1;
QSqlDatabase db = QSqlDatabase::database();
db.transaction();
if (parent->takeChildDb(row) &&
item->setParentDb(newParent, newRow)) {
db.commit();
if (beginMoveRows(indexFromItem(parent), row, row, indexFromItem(newParent), newRow)) {
newParent->insertChild(newRow, parent->takeChild(row));
endMoveRows();
}
return indexFromItem(item);
} else {
db.rollback();
return index;
}
} else { // move as child of previous sibling
ListItem* newParent = parent->child(row - 1);
if (!newParent)
return index;
QSqlDatabase db = QSqlDatabase::database();
db.transaction();
if (parent->takeChildDb(row) &&
item->setParentDb(newParent, newParent->childCount())) {
db.commit();
if (beginMoveRows(indexFromItem(parent), row, row, indexFromItem(newParent), newParent->childCount())) {
newParent->appendChild(parent->takeChild(row));
endMoveRows();
}
newParent->setExpanded(true);
return indexFromItem(item);
} else {
db.rollback();
return index;
}
}
}示例3: appendChild
QModelIndex ListModel::appendChild(const QModelIndex& parent, int row, QString content)
{
if (parent.isValid() && parent.column() != 0)
return QModelIndex();
ListItem* parentItem = itemFromIndex(parent);
if (!parentItem)
return QModelIndex();
SqlQuery sql;
sql.prepare("UPDATE list_item SET weight = weight + 1 WHERE parent_id = :parent AND weight >= :row");
sql.bindValue(":list", _listId);
sql.bindValue(":parent", parentItem->id());
sql.bindValue(":row", row);
if (!sql.exec())
return QModelIndex();
sql.prepare("INSERT INTO list_item (list_id, parent_id, weight, content, created_at) VALUES (:list, :parent, :row, :content, CURRENT_TIMESTAMP)");
sql.bindValue(":list", _listId);
sql.bindValue(":parent", parentItem->id());
sql.bindValue(":row", row);
sql.bindValue(":content", content);
if (!sql.exec())
return QModelIndex();
int id = sql.lastInsertId().toInt();
beginInsertRows(parent, row, row);
ListItem* newItem = new ListItem(_listId, id, content);
if (isNewItemCheckable(parentItem, row))
newItem->setCheckable(true);
parentItem->insertChild(row, newItem);
endInsertRows();
return indexFromItem(newItem);
}