QT之ComboBox角色使用QAbstractListModel

实例如下，

comboxlistnodel.h文件

#ifndef COMBOXLISTNODEL_H#define COMBOXLISTNODEL_H#include <QAbstractListModel>#include <QList>class IolData{public:    IolData(QVariant name,QVariant type,QVariant aval,QVariant sf,QVariant acdh,            QVariant acdb,QVariant acds,QVariant a0,QVariant a1,QVariant a2)    {        m_iol_name = name;        m_iol_type = type;        m_iol_a = aval;        m_iol_sf = sf;        m_iol_acdh = acdh;        m_iol_acdb = acdb;        m_iol_acds = acds;        m_iol_a0 = a0;        m_iol_a1 = a1;        m_iol_a2 = a2;    }public:    QVariant    m_iol_name;    QVariant    m_iol_type;    QVariant    m_iol_a;    QVariant    m_iol_sf;    QVariant    m_iol_acdh;    QVariant    m_iol_acdb;    QVariant    m_iol_acds;    QVariant    m_iol_a0;    QVariant    m_iol_a1;    QVariant    m_iol_a2;};class comboxlistnodel: public QAbstractListModel{    Q_OBJECT    Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentIndexChanged)public:    enum IolRoles {//枚举角色        NameRole = 0,        TypeRole,        ARole,        SfRole,        AcdHRole,        AcdBRole,        AcdSRole,        A0Role,        A1Role,        A2Role    };    int rowCount(const QModelIndex &parent = QModelIndex()) const;    //QAbstractListModel是抽象类，所以需要实现下面两个函数    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;    explicit  comboxlistnodel(QObject *parent = 0);    ////////    ~comboxlistnodel();    int      currentIndex();    void     setCurrentIndex(int index);signals:    void currentIndexChanged();protected:    QHash<int, QByteArray> roleNames() const;private:    QList<IolData>     m_items;    int             m_current_index;      QVariant roleData( IolData item,int role)const;};#endif // COMBOXLISTNODEL_H

这里是comboxlistnodel.cpp文件

#include "comboxlistnodel.h"int comboxlistnodel::rowCount(const QModelIndex &parent) const{    return m_items.count();}QVariant comboxlistnodel::data(const QModelIndex &index, int role) const{    if ((index.row() < 0) || (index.row() >= m_items.count())) {        return QVariant();    }    return roleData(m_items.at(index.row()),role);}comboxlistnodel::comboxlistnodel(QObject *parent){m_current_index = 0;IolData a(118,"aa","aa","aa","aa","aa","aa","aa","aa","aa");IolData b(119,"aa","aa","aa","aa","aa","aa","aa","aa","aa");IolData c(110,"aa","aa","aa","aa","aa","aa","aa","aa","aa");IolData d(111,"aa","aa","aa","aa","aa","aa","aa","aa","aa");m_items.push_back(a);m_items.push_back(b);m_items.push_back(c);m_items.push_back(d);}comboxlistnodel::~comboxlistnodel(){}int comboxlistnodel::currentIndex(){  return m_current_index;}void comboxlistnodel::setCurrentIndex(int index){    m_current_index = index;    emit currentIndexChanged();}QHash<int, QByteArray> comboxlistnodel::roleNames() const//设置角色名{    QHash<int,QByteArray> roles;    roles[NameRole] = "IolName";    roles[TypeRole] = "IolType";    roles[ARole   ] = "IolA";    roles[SfRole  ] = "IolSf";    roles[AcdHRole] = "IolAcdH";    roles[AcdBRole] = "IolAcdB";    roles[AcdSRole] = "IolAcdS";    roles[A0Role  ] = "IolA0";    roles[A1Role  ] = "IolA1";    roles[A2Role  ] = "IolA2";    return roles;}QVariant comboxlistnodel::roleData(IolData item, int role) const{    QVariant ret;    switch (role) {    case NameRole:        ret = item.m_iol_name;        break;    case TypeRole:        ret = item.m_iol_type;        break;    case ARole:        ret = item.m_iol_a;        break;    case SfRole:        ret = item.m_iol_sf;        break;    case AcdHRole:        ret = item.m_iol_acdh;        break;    case AcdBRole:        ret = item.m_iol_acdb;        break;    case AcdSRole:        ret = item.m_iol_acds;        break;    case A0Role:        ret = item.m_iol_a0;        break;    case A1Role:        ret = item.m_iol_a1;        break;    case A2Role:        ret = item.m_iol_a2;        break;    default:        ret = QVariant();        break;    }    return ret;}

main.cpp中

comboxlistnodel *appc=newcomboxlistnodel();

    QQmlApplicationEngine engine;

    engine.rootContext()->setContextProperty("appc", appc );

 

qml中：

        Rectangle{width:idViewTester.width;height: 60;color: "#3A3223";

            ComboBox {

                textRole: "IolName"

                model:appc

            }

        }

效果：