QTableView中点击单元格弹出QComboBox

主要是用QItemDelegate,写一个类继承QItemDelegate,实现createEditor()，setEditorData()和setModelData()方法

createEditor()实现当双击时，弹出的QComboBox中显示的内容

QWidget * ItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QComboBox *editor = new QComboBox(parent);
	for (int i = 0, size = _strList.count(); i < size; i++)
		editor->addItem(_strList.at(i));
    return editor;
}

setEditorData()来设置QComboBox当前editor的数据

void ItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    QString text = index.model()->data(index, Qt::EditRole).toString();
    QComboBox *comboBox = static_cast(editor);
    int tindex = comboBox->findText(text);
    comboBox->setCurrentIndex(tindex);
}

setModelData()设置QTableView的model的数据

void ItemDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
    QComboBox *comboBox = static_cast(editor);
    QString text = comboBox->currentText();
    model->setData(index, text, Qt::EditRole);
}

最后只需要创建ItemDelegate的对象，设置QTableView对应列的代理即可

ItemDelegate *itemDelegate = new ItemDelegate(this);
ui.tableView->setItemDelegateForColumn(1, itemDelegate);//设置第二列