一个模型视图的例子

转自：http://hi.baidu.com/huangh0z0/blog/item/1a97cd3198cf0890a8018ec2.html

 

// main.cpp #include <QtGui> #include "weaponmodel.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); QTextCodec::setCodecForTr(QTextCodec::codecForLocale()); WeaponModel model; QTableView view; view.setModel(&model); //关联视图与模型 view.setWindowTitle(QObject::tr("自定义模型")); view.resize(640,480); view.show(); return app.exec(); } -------------------------------------------------------------------------------------------------------------------------- // weaponmodel.h #ifndef WEAPONMODEL_H #define WEAPONMODEL_H #include <QAbstractTableModel> #include <QModelIndex> #include <QVariant> class WeaponModel : public QAbstractTableModel { public: WeaponModel(QObject *parent = 0); //实现以下几个纯虚函数 virtual int rowCount(const QModelIndex& parent = QModelIndex()) const; virtual int columnCount(const QModelIndex& parent = QModelIndex()) const; QVariant data(const QModelIndex &index, int role) const; QVariant headerData(int section, Qt::Orientation orientation, int role) const; private: QVector<short> army; QVector<short> weapon; QStringList type; //这里的数据都是用QMap保存的，节省存储空间，但是显示的时候需要 键-值映射 QMap<short, QString> armyMap; QMap<short, QString> weaponMap; QStringList header; void populateModel(); }; #endif ------------------------------------------------------------------------------------------------------------------------- // weaponmodel.cpp #include <QtGui> #include "weaponmodel.h" WeaponModel::WeaponModel(QObject *parent) : QAbstractTableModel(parent) { armyMap[1] = tr("空军"); armyMap[2] = tr("海军"); armyMap[3] = tr("陆军"); armyMap[4] = tr("海军陆战队"); weaponMap[1] = tr("轰炸机"); weaponMap[2] = tr("战斗机"); weaponMap[3] = tr("航空母舰"); weaponMap[4] = tr("驱逐舰"); weaponMap[5] = tr("直升机"); weaponMap[6] = tr("坦克"); weaponMap[7] = tr("两栖攻击舰"); weaponMap[8] = tr("两栖战车"); populateModel(); } void WeaponModel::populateModel() { header << tr("军种") << tr("种类") << tr("武器"); army << 1 << 2 << 3 << 4 << 2 << 4 << 3 << 1; weapon << 1 << 3 << 5 << 7 << 4 << 8 << 6 << 2; type << tr("B-2") << tr("尼米兹级") << tr("阿帕奇") << tr("黄蜂级") << tr("阿利伯克级") << tr("AAAV") << tr("M1A1") << tr("F-22") ; } int WeaponModel::columnCount(const QModelIndex& parent) const { return 3; } int WeaponModel::rowCount(const QModelIndex& parent) const { return army.size(); } QVariant WeaponModel::data(const QModelIndex &index, int role) const { if(!index.isValid()) return QVariant(); qDebug() << index; if(role == Qt::DisplayRole) { switch(index.column()) { case 0: return armyMap[army[index.row()]]; break; case 1: return weaponMap[weapon[index.row()]]; break; case 2: return type[index.row()]; default: return QVariant(); } } return QVariant(); } QVariant WeaponModel::headerData(int section, Qt::Orientation orientation, int role) const { if(role == Qt::DisplayRole && orientation == Qt::Horizontal) return header[section]; return QAbstractTableModel::headerData(section, orientation, role); }