tableview 大量数据内存消耗小

#include "usermodel.h" #include <QColor> #include<QDebug> userModel::userModel(QObject *parent) { mResult.clear(); mRow=0; mColumn=5; setParent(parent); } userModel::~userModel() { } void userModel::setHeaderList(const QStringList &headerlist) { m_header_list = headerlist; } QVariant userModel::headerData(int section, Qt::Orientation orientation,int role)const { if(role==Qt::DisplayRole && orientation == Qt::Horizontal) { switch (section) { case 0: return m_header_list.at(0); case 1: return m_header_list.at(1); case 2: return m_header_list.at(2); case 3: return m_header_list.at(3); case 4: return m_header_list.at(4); default: break; } } return QAbstractTableModel::headerData(section, orientation, role); } int userModel::rowCount(const QModelIndex &parent) const { Q_UNUSED(parent); return mRow; } int userModel::columnCount(const QModelIndex &parent ) const { Q_UNUSED(parent); return m_header_list.count(); } QVariant userModel::data(const QModelIndex &index, int role )const { if (!index.isValid()) { return QVariant(); } switch (role) { case Qt::TextColorRole: return QColor(Qt::black); case Qt::TextAlignmentRole: return QVariant(Qt::AlignLeft | Qt::AlignVCenter); case Qt::DisplayRole: { if (mResult.size() > index.row()) { if (mResult[0].size() > index.column()) { return mResult[index.row()][index.column()]; } } qDebug() << role << index.column() << index.row(); return QVariant(); } case Qt::CheckStateRole: { return QVariant(); // } default: return QVariant(); } return QVariant(); } void userModel::handleResults(const QVector< QVector<QString> > mResult_) { // emit signalRecvhandleResult(); beginResetModel(); // // if (rstData.retCode == 0) { mResult = mResult_; mRow = mResult.size(); // qDebug() << "mRow = " << mRow; mColumn = mRow > 0 ? mResult[0].size() : 0; // qDebug() << "mColumn = " << mColumn; } // else // { // clear(); // } endResetModel(); // } void userModel::clear() { beginResetModel(); mRow=0; mResult.clear(); endResetModel(); // } void userModel::SetData(const QVector<QVector<QString> > &result,int index) { Q_UNUSED(index); beginResetModel(); mResult=result; endResetModel(); } void userModel::SetRowCount(int count) { beginResetModel(); mRow=count; endResetModel(); // }