qttableview使用

#include <QtWidgets> #include <QDebug> #include "citymodel.h" CityModel::CityModel(QObject *parent) : QAbstractTableModel(parent) { } void CityModel::setCities(const QStringList &cityNames) { cities = cityNames; distances.resize(cities.count() * (cities.count() - 1) / 2); distances.fill(0); // QAbstractItemModel::beginResetModel(); // QAbstractItemModel::endResetModel(); } int CityModel::rowCount(const QModelIndex & /* parent */) const { //qDebug()<<"rowCount"; return cities.count(); } int CityModel::columnCount(const QModelIndex & /* parent */) const { return cities.count(); } QVariant CityModel::data(const QModelIndex &index, int role) const { if (index.isValid() && role == Qt::DisplayRole) { qDebug()<<"hello"; return distances.value(0); } return QVariant(); } bool CityModel::setData(const QModelIndex &index, const QVariant &value, int role) { if (index.isValid() && index.row() != index.column() && role == Qt::EditRole) { int offset = offsetOf(index.row(), index.column()); distances[offset] = value.toInt()+1; QModelIndex transposedIndex = createIndex(index.column(), index.row()); // emit dataChanged(index, index); // emit dataChanged(transposedIndex, transposedIndex); return true; } return true; } QVariant CityModel::headerData(int section, Qt::Orientation orientation , int role) const { if (role == Qt::DisplayRole) return cities[section]; return QVariant(); } Qt::ItemFlags CityModel::flags(const QModelIndex &index) const { Qt::ItemFlags flags = QAbstractItemModel::flags(index); if (index.row() != index.column()) flags |= Qt::ItemIsEditable; return flags; } bool CityModel::removeRows(int row, int count, const QModelIndex &parent) { beginRemoveRows(parent,row,row+count-1); cities.removeOne("test"); endRemoveRows(); return true; } bool CityModel::insertRows(int row, int count, const QModelIndex &parent) { beginInsertRows(parent,row,row+count-1); cities.append("test"); endInsertRows(); return true; } int CityModel::offsetOf(int row, int column) const { if (row < column) qSwap(row, column); return (row * (row - 1) / 2) + column; }