QWidget *TrackDelegate::createEditor(QWidget *parent,

                                 const QStyleOptionViewItem &option,

                                 const QModelIndex &index) const

{

if (index.column() == durationColumn) {

    //QTimeEdit \*timeEdit = new QTimeEdit(parent);

    QComboBox \*timeEdit = new QComboBox(parent);

    //timeEdit->installEventFilter(const\_cast<TrackDelegate\*>(this));

    timeEdit->setObjectName("timeEdit");

// timeEdit->setDisplayFormat("mm:ss");

// connect(timeEdit, SIGNAL(editingFinished()),

// this, SLOT(commitAndCloseEditor()));

    timeEdit->insertItem(0,"test1");

    timeEdit->insertItem(1,"test2");

    return timeEdit;

} else {

    return QItemDelegate::createEditor(parent, option, index);

}

}
void TrackDelegate::setEditorData(QWidget *editor,

                              const QModelIndex &index) const

{

if (index.column() == durationColumn) {

     QComboBox \*timeEdit = qobject\_cast<QComboBox \*>(editor);

     timeEdit->setCurrentIndex(1);

// int secs = index.model()->data(index, Qt::DisplayRole).toInt();

// QTimeEdit *timeEdit = qobject_cast(editor);

// timeEdit->setTime(QTime(0, secs / 60, secs % 60));

} else {

    QItemDelegate::setEditorData(editor, index);

}

}

void TrackDelegate::setModelData(QWidget *editor,QAbstractItemModel *model,

                             const QModelIndex &index) const

{

if (index.column() == durationColumn) {

// QTimeEdit *timeEdit = qobject_cast(editor);

// QTime time = timeEdit->time();

// int secs = (time.minute() * 60) + time.second();

// model->setData(index, secs);

} else {

    QItemDelegate::setModelData(editor, model, index);

}

}
上述三个方法是实现tableview编辑某个单元格出现控件的主要方法
其中第三个方法TrackDelegate::setModelData
是实现把编辑的控件发的数据写回到model中，但这个方法什么时候会调用？
当你编辑完控件后点击tableview其他单元格后会调用该方法
或者代码添加emit commitData(editor);就会立马执行该方法。