QItemDelegate with custom widgets

Question

I'm having problems with my QTableView and QItemDelegate classes. For one column my delegate creates a simple combo box and everything works just fine. For my 2nd column I need a widget that has two combo boxes in a single widget.

I've written the following code in my QItemDelegate, just to be clear this only shows code for my 2nd column, the one that doesn't work. The other simple Combo-box isn't shown as it works fine:

QWidget *UserDefinedUnitsDelegate::createEditor(QWidget *parent,const QStyleOptionViewItem & option ,const QModelIndex & index ) const
{
    //set up a simple widget with a layout
    QWidget* pWidget = new QWidget(parent);
    QHBoxLayout* hLayout = new QHBoxLayout(pWidget);
    pWidget->setLayout(hLayout);

    //add two combo boxes to the layout
    QComboBox* comboEditor = new QComboBox(pWidget);    
    QComboBox* comboEditor2 = new QComboBox(pWidget);   

    //now add both editors to this
    hLayout->addWidget(comboEditor);
    hLayout->addWidget(comboEditor2);
    return pWidget;
}

Now this displays just fine but when I edit it and click elsewhere it doesn't stop editing. Can anyone offer any pointers?

Edit: So i need to call CommitData() and closeEditor() at some point. Can anyone offer pointers on where to call these?

Thanks.

Answer 1

You can keep the editor widget as a member of class and emit commitData when the current index of one of the comboboxes has changed. So you can connect currentIndexChanged(int) to a slot and emit commitData from there:

QWidget *UserDefinedUnitsDelegate::createEditor(QWidget *parent,const QStyleOptionViewItem & option ,const QModelIndex & index ) const
{
    //set up a simple widget with a layout
    pWidget = new QWidget(parent);
    QHBoxLayout* hLayout = new QHBoxLayout(pWidget);
    pWidget->setLayout(hLayout);

    //add two combo boxes to the layout
    QComboBox* comboEditor = new QComboBox(pWidget);    
    QComboBox* comboEditor2 = new QComboBox(pWidget);   

    connect(comboEditor,SIGNAL(currentIndexChanged(int)),this,SLOT(setData(int)));
    connect(comboEditor2,SIGNAL(currentIndexChanged(int)),this,SLOT(setData(int)));

    //now add both editors to this
    hLayout->addWidget(comboEditor);
    hLayout->addWidget(comboEditor2);
    return pWidget;
}

void UserDefinedUnitsDelegate::setData(int val)
{
    emit commitData(pWidget);
}