Qt 之重写QAbstractTableModel显示数据

#ifndef TABLEMODEL_H
#define TABLEMODEL_H
 
#include 
#include 
 
class TableModel : public QAbstractTableModel
{
    Q_OBJECT
public:
    explicit TableModel(QObject *parent = nullptr);
    void setCell(const QVector > &cells);
protected:
    QVariant data(const QModelIndex &index, int role) const;
    int rowCount(const QModelIndex &parent) const;
    int columnCount(const QModelIndex &parent) const;
    QVariant headerData(int section, Qt::Orientation orientation, int role) const;
private:
    QVector> _cells;
};
 
#endif // TABLEMODEL_H

#include "tablemodel.h"
#include "global.h"
 
TableModel::TableModel(QObject *parent) : QAbstractTableModel(parent)
{
    //使用[]要先resize
    _cells.resize(ROW_OF_TABLE);
    for(int i=0;i vec(COLUMN_OF_TABLE);
        _cells[i]=vec;
    }
}
//resetModel()是更新数据的
void TableModel::setCell(const QVector >& cells)
{
    beginResetModel();
    _cells=cells;
    endResetModel();
}
 
QVariant TableModel::data(const QModelIndex &index, int role) const
{
    //Q_UNUSED(role);
    if(role==Qt::DisplayRole)
    {
        int row=index.row();
        int col=index.column();
        return _cells[row][col];
    }
    else if (role == Qt::TextAlignmentRole)
    {
            return int(Qt::AlignHCenter | Qt::AlignVCenter);
    }
    return QVariant();//这挺重要,这个函数调用多次,用来显示数据的
}
//rowCount和columnCount必须重写
int TableModel::rowCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent);
    return ROW_OF_TABLE;
}
 
int TableModel::columnCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent);
    return COLUMN_OF_TABLE;
}
 
QVariant TableModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if(orientation==Qt::Horizontal && role==Qt::DisplayRole)
    {
        switch (section) {
        case 0:
            return "ID";
            break;
        case 1:
            return "SA";
            break;
        case 2:
            return "状态";
            break;
        case 3:
            return "进度";
            break;
        case 4:
            return "错误";
            break;
        case 5:
            return "时间";
            break;
        default:
            break;
        }
    }
    else if(orientation==Qt::Horizontal && role==Qt::TextAlignmentRole)
    {
        return int(Qt::AlignHCenter | Qt::AlignVCenter);
    }
    return QVariant();
}

setData()没用到,不过应该是View->Data,对应data()是Data->View

结合QTableView就可以了

model=new TableModel(this);
view=new QTableView(this);
view->setModel(model);
view->setEditTriggers(QAbstractItemView::NoEditTriggers);
view->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
view->verticalHeader()->setVisible(false);