(二)Qt中QTableView中加入Check列实现

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;
}

 

 

 

【Qt】QTableView中嵌入复选框CheckBox 的四种方法总结