Qstyleditemdelegate probeme with Qcombobox

[advseo32]

Hi every boby

i have probleme when i start implementing createEditor() function in Qstyleditemclass in Qtablewidget

her

QWidget *comboBoxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
 
    if(creeConnexion())
    {
        if(index.column() == 1 || index.column() == 0)
        {
            QComboBox *editor = new QComboBox(parent);
            editor->setEditable(true);
 
            // Query data
            QSqlQuery *query = new QSqlQuery("select designation from Produit") ;
            while(query->next())
                    editor->addItem(query->value(0).toString());
 
            return editor;
        }
 
            }else
                       // the problem her, i want to return the default editor for other cells but , the app crashed when i user this code below
                          return QStyledItemDelegate::createEditor(parent,option,index);
 
}

QWidget *comboBoxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{

    if(creeConnexion())
    {
        if(index.column() == 1 || index.column() == 0)
        {
            QComboBox *editor = new QComboBox(parent);
            editor->setEditable(true);

            // Query data
            QSqlQuery *query = new QSqlQuery("select designation from Produit") ;
            while(query->next())
                    editor->addItem(query->value(0).toString());

            return editor;
        }

            }else
                       // the problem her, i want to return the default editor for other cells but , the app crashed when i user this code below
                          return QStyledItemDelegate::createEditor(parent,option,index);

}

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[advseo32]

Plz i need your help

[advseo32]

i wait for your help

[advseo32]

Update thread !

[Santosh Reddy]

What is creeConnexion()?

[advseo32]

What is creeConnexion()?

It's a function to test the connexion on database

her is the function

static bool creeConnexion()
{
    QSqlDatabase *db ;
    db = new QSqlDatabase;
    *db = QSqlDatabase::addDatabase("QSQLITE") ;
    db->setHostName("localhost");
    db->setDatabaseName("gestionstockDB.db");
    db->setPassword("");
    db->setUserName("");
    // Verifier l'ouverture de la base de donn�
    if(!db->open())
    {
      return false;
    }
    return true;
}

static bool creeConnexion()
{
    QSqlDatabase *db ;
    db = new QSqlDatabase;
    *db = QSqlDatabase::addDatabase("QSQLITE") ;
    db->setHostName("localhost");
    db->setDatabaseName("gestionstockDB.db");
    db->setPassword("");
    db->setUserName("");
    // Verifier l'ouverture de la base de donn�
    if(!db->open())
    {
      return false;
    }
    return true;
}

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[Santosh Reddy]

So do you realy want to create and open new database connection each time an item in the table is edited? and are you deleting it when editor is done?

You use QAbstractItemView::setItemDelegateForColumn(int column, QAbstractItemDelegate *delegate); only for the specific column, then you will not need to check the column number in the createEditor.

I think you are missing to mention somthing else...