QLineEdit Delegate value update

Hello All

I have created a QLineEdit delegate to add it to TreeView, the source code is done using the spinbox delegate example.
What I want is to get the value of that line edit box. I cant seem to get the correct value. I always get the one before the last value.

My questions is HOW to update the control so I can get the current value that the user presses Enter?

Below is the class for the LineEditDelegate, and also for the getValue slot in Mycalss

Code:

---

LineEditDelegate::LineEditDelegate(QObject *parent, Myclass* mc)
        : QItemDelegate(parent), m_mc(mc)
{
}
 
QWidget *LineEditDelegate::createEditor(QWidget *parent,
                                        const QStyleOptionViewItem &/* option */,
                                        const QModelIndex &/* index */) const
{
    QLineEdit *editor = new QLineEdit(parent);
 
    connect(editor, SIGNAL(returnPressed()), m_mc, SLOT(getValue() ) );
 
    //connect(editor, SIGNAL(textChanged(QString)), editor, SLOT(setText(QString)) );
 
    return editor;
}
 
void LineEditDelegate::setEditorData(QWidget *editor,
                                     const QModelIndex &index) const
{
    QString value = index.model()->data(index, Qt::EditRole).toString();
 
    QLineEdit *lineEdit = static_cast<QLineEdit*>(editor);
    lineEdit->setText(value);
}
 
void LineEditDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
       const QModelIndex &index) const
{
    QLineEdit *lineEdit = static_cast<QLineEdit*>(editor);
    double value = lineEdit->text().toDouble();
 
    model->setData(index, value, Qt::EditRole);
}
 
void LineEditDelegate::updateEditorGeometry(QWidget *editor,
           const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
    editor->setGeometry(option.rect);
}

---

Code:

---

void getValue(){
    QModelIndex index = m_view->currentIndex();
    double size = m_view->model()->data(index, Qt::DisplayRole).toDouble();
 
    //The size is ALWAYS the older value, not the last one
    QMessageBox::information(0, "value", QString("%1").arg(size));   
}

---

Any comment is more than welcome

Thanks all

In createEditor the "connect" is useless.
In setModelData, you are using some "double". Why ? I guess QString would be more appropriate with a QLineEdit, unless you want to type in numbers. If so, don't forget to set a QDoubleValidator in "createEditor" just before the return.


Try this below, it should do the trick :cool: for QStrings

Code:

---

LineEditDelegate::LineEditDelegate(QObject *parent)
    : QItemDelegate(parent)
{
}
 
QWidget *LineEditDelegate::createEditor(QWidget *parent,
    const QStyleOptionViewItem &/* option */,
    const QModelIndex &/* index */) const
{
    QLineEdit * = new QLineEdit(parent);
 
    return editor;
}
 
void LineEditDelegate::setEditorData(QWidget *editor,
                                    const QModelIndex &index) const
{
    QString value = index.model()->data(index, Qt::EditRole).toString();
 
    QLineEdit *lineEdit = static_cast<QLineEdit*>(editor);
    lineEdit->setText(value);
}
 
void LineEditDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                   const QModelIndex &index) const
{
    QLineEdit *lineEdit = static_cast<QLineEdit*>(editor);
//    lineEdit->returnPressed();
    QString value = lineEdit->text();
 
    model->setData(index, value, Qt::EditRole);
}
 
void LineEditDelegate::updateEditorGeometry(QWidget *editor,
    const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
    editor->setGeometry(option.rect);
}

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Be Qt and have fun !