QTableView-mode中嵌入复选框CheckBox

QTableView中嵌入复选框CheckBox
第二种方法：设置QAbstractTableModel的flags()函数法
通过Delegate创建QCheckBox来实现的Check列，只有在该列进入编辑模式时才能够Check/Uncheck。这显然不是我们想要的，网上翻来翻去，在一个国外论坛中看到了无需Delegate的实现方法，只需重写Model即可：

主要是修改两个函数：
//设置某一列为可选角色，绘画出QCheckBox
Qt::ItemFlags flags(const QModelIndex &index) const;
//根据界面选择QCheckbox，修改Model中的数据
bool setData(const QModelIndex &index, const QVariant &value, int role);

2.在StudentInfoModel .h头文件中的主要代码：   
class StudentInfoModel : public QAbstractTableModel    
{   Q_OBJECT   
public:   StudentInfoModel(const int totalColumn, const int aColumnNumWithChechBox = 0, QObject *parent = 0)   :totalColumn(totalColumn),colNumberWithCheckBox(aColumnNumWithChechBox),   QAbstractTableModel(parent) {rowCheckStateMap.clear();};   
public:   int rowCount(const QModelIndex &parent = QModelIndex()) const;   int columnCount(const QModelIndex &parent = QModelIndex()) const;   QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;   QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;   Qt::ItemFlags flags(const QModelIndex &index) const;   bool setData(const QModelIndex &index, const QVariant &value, int role);   public:   void AddStudentInfo(const StudentInfo &studentInfo);   signals:   void StudentInfoIsChecked(const StudentInfo &studentInfo);   private:   typedef QVector<StudentInfo> StudentInfos;   StudentInfos studentInfos;   int totalColumn;   int colNumberWithCheckBox;   QMap<int, Qt::CheckState> rowCheckStateMap;   
};   3.在StudentInfoModel.cpp文件中的主要代码如下：   
QVariant StudentInfoModel::data( const QModelIndex &index, int role ) const  
{   if (role == Qt::DisplayRole)    {    if (index.column() == 0)    return QString::number(index.row()+1);    if (index.column() == 1)    return studentInfos[index.row()].stuNumber;    if (index.column() == 2)   return studentInfos[index.row()].stuName;    if (index.column() == 3)   return studentInfos[index.row()].stuID;    if (index.column() == 4)   return studentInfos[index.row()].stuPhoneNumber;   if (index.column() == 5)    return studentInfos[index.row()].department;    if (index.column() == 6)    return studentInfos[index.row()].stuDescription;    }    if (role == Qt::CheckStateRole)    {    if (index.column() == colNumberWithCheckBox)    {    if (rowCheckStateMap.contains(index.row()))    return rowCheckStateMap[index.row()] == Qt::Checked ? Qt::Checked : Qt::Unchecked; return Qt::Unchecked;    }    }    return QVariant();   
}   Qt::ItemFlags StudentInfoModel::flags( const QModelIndex &index ) const  
{   if  (!index.isValid())   return 0;   if (index.column() == colNumberWithCheckBox)   return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable;   return  Qt::ItemIsEnabled | Qt::ItemIsSelectable;   
}   bool StudentInfoModel::setData( const QModelIndex &index, const QVariant &value, int role )   
{   if(!index.isValid())   return false;   if (role == Qt::CheckStateRole && index.column() == colNumberWithCheckBox)   {   if (value == Qt::Checked) //   {   rowCheckStateMap[index.row()] = Qt::Checked;    if(studentInfos.size() > index.row())   emit StudentInfoIsChecked(studentInfos[index.row()]);   }   else  {   rowCheckStateMap[index.row()] = Qt::Unchecked;   }    }   return true;   
}