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);

Cpp代码


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;
}