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#include "Record.hpp"
void Record::WriteTo(QFile file) {
file.open(QFile::ReadWrite | QFile::Text | QFile::Truncate);
QTextStream stream(&file);
stream.setCodec("UTF-8");
stream << books_.size() << ' ' << vendors_.size() << '\n';
for (const auto &book : books_) {
stream << book << '\n';
}
for (const auto &vendor : vendors_) {
stream << vendor << '\n';
}
}
void Record::ReadFrom(QFile file) {
file.open(QFile::ReadOnly | QFile::Text);
QTextStream stream(&file);
stream.setCodec("UTF-8");
books_.clear();
vendors_.clear();
int book_count, vendor_count;
stream >> book_count >> vendor_count;
stream.skipWhiteSpace();
for (int i = 0; i < book_count; i++) {
Book book;
stream >> book;
books_.push_back(std::move(book));
}
for (int i = 0; i < vendor_count; i++) {
Vendor vendor;
stream >> vendor;
vendors_.push_back(std::move(vendor));
}
}
int BookModel::rowCount(const QModelIndex &parent) const {
if (parent.isValid())
return 0;
return static_cast<int>(record_->GetBooks().size());
}
int BookModel::columnCount(const QModelIndex &parent) const {
if (parent.isValid())
return 0;
return 6;
}
QVariant BookModel::headerData(int section, Qt::Orientation orientation,
int role) const {
if (role != Qt::DisplayRole)
return QVariant();
if (orientation == Qt::Horizontal) {
switch (section) {
case 0:
return QStringLiteral("ISBN");
case 1:
return QStringLiteral("标题");
case 2:
return QStringLiteral("类型");
case 3:
return QStringLiteral("作者");
case 4:
return QStringLiteral("出版社");
case 5:
return QStringLiteral("库存");
default:
return QVariant();
}
}
return QVariant();
}
QVariant BookModel::data(const QModelIndex &index, int role) const {
if (role != Qt::DisplayRole)
return QVariant();
if (!index.isValid())
return QVariant();
if (index.row() >= static_cast<int>(record_->GetBooks().size()) ||
index.row() < 0)
return QVariant();
int row = index.row();
const Book &book = record_->GetBooks()[row];
int col = index.column();
switch (col) {
case 0:
return QString::fromStdU16String(book.GetIsbn());
case 1:
return QString::fromStdU16String(book.GetTitle());
case 2:
return QString::fromStdU16String(book.GetType());
case 3:
return QString::fromStdU16String(book.GetAuthor());
case 4:
return QString::fromStdU16String(book.GetPress());
case 5:
return book.GetStockCount();
default:
return QVariant();
}
}
bool BookModel::setData(const QModelIndex &index, const QVariant &value,
int role) {
if (index.isValid() && role == Qt::EditRole) {
int row = index.row();
Book &book = record_->GetBooks()[row];
int col = index.column();
switch (col) {
case 0:
if (!value.canConvert<QString>())
return false;
book.SetIsbn(value.toString().toStdU16String());
return true;
case 1:
if (!value.canConvert<QString>())
return false;
book.SetTitle(value.toString().toStdU16String());
emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
return true;
case 2:
if (!value.canConvert<QString>())
return false;
book.SetType(value.toString().toStdU16String());
emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
return true;
case 3:
if (!value.canConvert<QString>())
return false;
book.SetAuthor(value.toString().toStdU16String());
emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
return true;
case 4:
if (!value.canConvert<QString>())
return false;
book.SetPress(value.toString().toStdU16String());
emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
return true;
case 5:
if (!value.canConvert<int>())
return false;
book.SetStockCount(value.toInt());
emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
return true;
default:
return false;
}
}
return false;
}
Qt::ItemFlags BookModel::flags(const QModelIndex &index) const {
if (!index.isValid())
return Qt::ItemIsEnabled;
return QAbstractTableModel::flags(index) | Qt::ItemIsEditable;
}
bool BookModel::insertRows(int row, int count, const QModelIndex &parent) {
beginInsertRows(parent, row, row + count - 1);
for (int i = 0; i < count; i++) {
record_->GetBooks().insert(record_->GetBooks().cbegin() + row, Book());
}
endInsertRows();
return true;
}
bool BookModel::removeRows(int row, int count, const QModelIndex &parent) {
beginRemoveRows(parent, row, row + count - 1);
record_->GetBooks().erase(record_->GetBooks().cbegin() + row,
record_->GetBooks().cbegin() + row + count);
endRemoveRows();
return true;
}
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