tableView的模型Model的实现

#include "tablemodel.h" #include <QDebug> TableModel::TableModel(QObject *parent) : QAbstractTableModel(parent) { headers << "open" << "high" << "low" << "close" << "total"; } int TableModel::rowCount(const QModelIndex &parent) const { return map_stock.size(); } int TableModel::columnCount(const QModelIndex &parent) const { return 4; // return currencyMap.count(); } //它有两个参数：第一个是QModelIndex，也就是单元格的位置；第二个是role，也就是这个数据的角色。 //在加载数据时，会自动的按照行列递增的方式向后进行索引填充数据。return的就是当前格子中所要写入的数据 QVariant TableModel::data(const QModelIndex &index, int role) const { // qDebug() <<"role:"<< role<< "index : " << index.row() << index.column(); if (!index.isValid()) return QVariant(); if (role == Qt::TextAlignmentRole) { return int(Qt::AlignRight | Qt::AlignVCenter); } else if (role == Qt::DisplayRole) { QString rowCurrency = currencyMapAt(index.row());//先找出行对应的list QString columnCurrency = map_stock.find(rowCurrency).value().at(index.column());//再找出列对应的数值 return columnCurrency;//这个为当前索引下要加的数据 } return QVariant(); } QVariant TableModel::headerData(int section, Qt::Orientation orientation, int role) const//表头内容 { if(role==Qt::DisplayRole && orientation==Qt::Horizontal)//列标题 { return headers[section]; } if(role==Qt::DisplayRole && orientation==Qt::Vertical)//行标题 { return 0; } return QAbstractTableModel::headerData(section,orientation,role); } void TableModel::setCurrencyMapStock(const QMap<QString, QList<QString> > &map) { map_stock = map; } QString TableModel::currencyMapAt(int offset) const//map的偏移 { return (map_stock.begin()+offset).key(); }