QTableView 的使用

设置

   example_model =new ExampleModel;(自定义的数据层model)
    QStringList headerList;
    headerList <<"名字"<<"序号"<<"性别"<<"年龄"<<"成绩";
    example_model->setHorizontalHeaderLabels(headerList);
    //表头
    exampleTableView = new QTableView;
    exampleTableView->setModel(example_model);
（model,数据层）

    //把表格的背景调成相间色
    exampleTableView->setAlterna ingRowColors( true );
 );

    exampleTableView->verticalHeader()->setVisible( false ); //垂直表头不显示

model 定义

class ExampleModel : public QAbstractTableModel //继承QAbstractTableModel
{
public:
    ExampleModel(QObject *parent = 0);
    ~ExampleModel();
//重写的五个函数
    int rowCount(const QModelIndex &parent) const;
    int columnCount(const QModelIndex &parent) const;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
    Qt::ItemFlags flags(const QModelIndex &index) const;
    bool setData(const QModelIndex &index, const QVariant &value, int role);
    QVariant headerData( int section, Qt::Orientation orientation, int role ) const;  

    void setHorizontalHeaderLabels(QStringList headerList);//设置表头

signals:

private:

    int colNumberWithCheckBox_; //有QCheckBox的列，为0 表示第0列

    QStringList headerList_;  //表头

};

//返回列数，根据水平表头
int ExampleModel::columnCount(const QModelIndex & /* parent */) const
{
    return   ( !headerList_.size())?5:headerList_.size();
//    return 5;
}

//获取当前关键字

QVariant ExampleModel::headerData( int section, Qt::Orientation orientation, int role ) const
{
    if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
    {
        if(section<headerList_.size())
        {
            return headerList_[section];
        }
    }
    return QVariant();
}
//设置表头
void ExampleModel::setHorizontalHeaderLabels(QStringList headerList)
{
    headerList_ = headerList;
}
//显示的数据
QVariant ExampleModel::data( const QModelIndex &index, int role ) const
{
    if (!index.isValid())
        return QVariant();

    int row = index.row();
    int col = index.column();

    switch(role)
    {
    case Qt::DisplayRole:

        if (col == 1)
        {
            return QString::number(index.row()+1);
        }
        break;
//    case Qt::FontRole:
//        if ( col == 0) //change font only for cell(X,0)
//        {
//            QFont boldFont;
//            boldFont.setBold(true);
//            return boldFont;
//        }
//        break;
      case Qt::ForegroundRole:
        if ( col == 3) //第3列
        {
             QBrush redForground(Qt::red);
             return redForground;

        }
        break;

    case Qt::BackgroundRole:

        if ((col == 1 ))  //change background only for cell(X,1)
        {
                QBrush blueBackground(Qt::blue);
                return blueBackground;

        break;
    case Qt::DecorationRole:

        if (row == 0 )
        { //设置图片
             return QPixmap(":images/current_pic.png");

        }
        break;
    case Qt::TextAlignmentRole:

             return Qt::AlignCenter; //字体中间对齐

        break;
    case Qt::CheckStateRole:
        if (col ==  colNumberWithCheckBox_)//add a checkbox to cell(row,col)
        {

            return Qt::isChecked? Qt::Checked : Qt::Unchecked;
        }
        break;
    }
    return QVariant();

}

//为了设置QCheckBox而重写的
Qt::ItemFlags ExampleModel::flags( const QModelIndex &index ) const
{
    if   (!index.isValid())
        return 0;

    if (index.column() == colNumberWithCheckBox_)
        return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable;
//若是想编辑可返回    return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
    return  Qt::ItemIsEnabled | Qt::ItemIsSelectable;
}

//设置数据，根据QChecoBox的状态
bool ExampleModel::setData( const QModelIndex &index, const QVariant &value, int role )
{

    if(!index.isValid())
        return false;

    if (role == Qt::CheckStateRole && index.column() == colNumberWithCheckBox_)
    {
    }
    return true;
}
 

注意

  #include<QTableView>
  #include<QHeaderView>

行为

单击

单击会发出信号clicked(QModelIndex)，需要自定义 槽函数：如 exampleTableViewClicked(QModelIndex)

    connect(exampleTableView,
            SIGNAL(clicked(QModelIndex)),
            this,
            SLOT(exampleTableViewClicked(QModelIndex)));

在槽函数(exampleTableViewClicked)中判断点击的是哪个单元格，如：

index.column() == 0 && index.row() == 0 为单元格（0，0）

双击

单击会发出信号 doubleClicked(QModelIndex),，需要自定义 槽函数：如 exampleTableViewDoubleClicked(QModelIndex)

 connect(exampleTableView,
          SIGNAL(doubleClicked(QModelIndex)),
          this,
          SLOT(exampleTableViewDoubleClicked(QModelIndex)));

右键菜单

    //如果你用在QTableView中使用右键菜单，需启用该属性
    exampleTableView->setContextMenuPolicy(Qt::CustomContextMenu);

连接信号槽，槽函数ShowMouseRightButton是自定义的

    connect( exampleTableView,
         SIGNAL(customContextMenuRequested(const QPoint)),
         this,
         SLOT(ShowMouseRightButton(const QPoint)));

author: wsh

email:  [email protected]