q3sqlmanager_p.cpp

奇趣公司比较新的qt/emd版本

        }
#ifndef QT_NO_CURSOR
        QApplication::restoreOverrideCursor();
#endif
    }
#ifdef QT_DEBUG_DATAMANAGER
        qDebug(" Done, result:" + QString::number(indexEquals));
#endif
    return indexEquals;
}

#ifndef QT_NO_SQL_FORM

class Q3SqlFormManagerPrivate
{
public:
    Q3SqlFormManagerPrivate() : frm(0), rcd(0) {}
    Q3SqlForm* frm;
    QSqlRecord* rcd;
};


/*! \internal

  Creates a form manager.

*/

Q3SqlFormManager::Q3SqlFormManager()
{
    d = new Q3SqlFormManagerPrivate();
}

/*! \internal

  Destroys the object and frees any allocated resources.

*/

Q3SqlFormManager::~Q3SqlFormManager()
{
    delete d;
}

/*!  \internal

  Clears the default form values.  If there is no default form,
  nothing happens,

*/

void Q3SqlFormManager::clearValues()
{
    if (form())
        form()->clearValues();
}

/*! \internal

  Sets the form used by the form manager to \a form.  If a record has
  already been assigned to the form manager, that record is also used by
  the \a form to display data.

  \sa form()

*/

void Q3SqlFormManager::setForm(Q3SqlForm* form)
{
    d->frm = form;
    if (d->rcd && d->frm)
        d->frm->setRecord(d->rcd);
}


/*! \internal

  Returns the default form used by the form manager, or 0 if there is
  none.

  \sa setForm()

*/

Q3SqlForm* Q3SqlFormManager::form()
{
    return d->frm;
}


/*! \internal

  Sets the record used by the form manager to \a record.  If a form has
  already been assigned to the form manager, \a record is also used by
  the default form to display data.

  \sa record()

*/

void Q3SqlFormManager::setRecord(QSqlRecord* record)
{
    d->rcd = record;
    if (d->frm) {
        d->frm->setRecord(d->rcd);
    }
}


/*! \internal

  Returns the default record used by the form manager, or 0 if there is
  none.

  \sa setRecord()
*/

QSqlRecord* Q3SqlFormManager::record()
{
    return d->rcd;
}


/*! \internal

  Causes the default form to read its fields .  If there is no
  default form, nothing happens.

  \sa setForm()

*/

void Q3SqlFormManager::readFields()
{
    if (d->frm) {
        d->frm->readFields();
    }
}

/*! \internal

  Causes the default form to write its fields .  If there is no
  default form, nothing happens.

  \sa setForm()

*/

void Q3SqlFormManager::writeFields()
{
    if (d->frm) {
        d->frm->writeFields();
    }
}

#endif // QT_NO_SQL_FORM

class Q3DataManagerPrivate
{
public:
    Q3DataManagerPrivate()
        : mode(QSql::None), autoEd(true), confEdits(3),
          confCancs(false) {}
    QSql::Op mode;
    bool autoEd;
    QBitArray confEdits;
    bool confCancs;

};

/*!
  \class Q3DataManager qsqlmanager_p.h

  \brief The Q3DataManager class is an internal class for implementing
  the data-aware widgets.

  \internal
  \compat

  Q3DataManager is a strictly internal class that acts as a base class
  for other data-aware widgets.

*/


/*!  \internal

  Constructs an empty data handler.

*/

Q3DataManager::Q3DataManager()
{
    d = new Q3DataManagerPrivate();
}


/*! \internal

  Destroys the object and frees any allocated resources.

*/

Q3DataManager::~Q3DataManager()
{
    delete d;
}


/*!  \internal

  Virtual function which is called when an error has occurred The
  default implementation displays a warning message to the user with
  information about the error.

*/
void Q3DataManager::handleError(QWidget* parent, const QSqlError& e)
{
#ifndef QT_NO_MESSAGEBOX
    if (e.driverText().isEmpty() && e.databaseText().isEmpty()) {
        QMessageBox::warning (parent, QLatin1String("Warning"), QLatin1String("An error occurred while accessing the database"));
    } else {
        QMessageBox::warning (parent, QLatin1String("Warning"), e.driverText() + QLatin1Char('\n') + e.databaseText(),
                           0, 0);
    }
#endif // QT_NO_MESSAGEBOX
}


/*! \internal

  Sets the internal mode to \a m.

*/

void Q3DataManager::setMode(QSql::Op m)
{
    d->mode = m;
}


/*! \internal

  Returns the current mode.

*/

QSql::Op Q3DataManager::mode() const
{
    return d->mode;
}


/*! \internal

  Sets the auto-edit mode to \a auto.

*/

void Q3DataManager::setAutoEdit(bool autoEdit)
{
    d->autoEd = autoEdit;
}



/*! \internal

  Returns true if auto-edit mode is enabled; otherwise returns false.

*/

bool Q3DataManager::autoEdit() const
{
    return d->autoEd;
}

/*! \internal

  If \a confirm is true, all edit operations (inserts, updates and
  deletes) will be confirmed by the user.  If \a confirm is false (the
  default), all edits are posted to the database immediately.

*/
void Q3DataManager::setConfirmEdits(bool confirm)
{
    d->confEdits = QBitArray(d->confEdits.size(), confirm);
}

/*! \internal

  If \a confirm is true, all inserts will be confirmed by the user.
  If \a confirm is false (the default), all edits are posted to the
  database immediately.

*/

void Q3DataManager::setConfirmInsert(bool confirm)
{
    d->confEdits[QSql::Insert] = confirm;
}

/*! \internal

  If \a confirm is true, all updates will be confirmed by the user.
  If \a confirm is false (the default), all edits are posted to the
  database immediately.

*/

void Q3DataManager::setConfirmUpdate(bool confirm)
{
    d->confEdits[QSql::Update] = confirm;
}

/*! \internal

  If \a confirm is true, all deletes will be confirmed by the user.
  If \a confirm is false (the default), all edits are posted to the
  database immediately.

*/

void Q3DataManager::setConfirmDelete(bool confirm)
{
    d->confEdits[QSql::Delete] = confirm;
}

/*! \internal

  Returns true if the table confirms all edit operations (inserts,
  updates and deletes), otherwise returns false.
*/

bool Q3DataManager::confirmEdits() const
{
    return (confirmInsert() && confirmUpdate() && confirmDelete());
}

/*! \internal

  Returns true if the table confirms inserts, otherwise returns
  false.
*/

bool Q3DataManager::confirmInsert() const
{
    return d->confEdits[QSql::Insert];
}

/*! \internal

  Returns true if the table confirms updates, otherwise returns
  false.
*/

bool Q3DataManager::confirmUpdate() const
{
    return d->confEdits[QSql::Update];
}

/*! \internal

  Returns true if the table confirms deletes, otherwise returns
  false.
*/

bool Q3DataManager::confirmDelete() const
{
    return d->confEdits[QSql::Delete];
}

/*! \internal

  If \a confirm is true, all cancels will be confirmed by the user
  through a message box.  If \a confirm is false (the default), all
  cancels occur immediately.
*/

void Q3DataManager::setConfirmCancels(bool confirm)
{
    d->confCancs = confirm;
}

/*! \internal

  Returns true if the table confirms cancels, otherwise returns false.
*/

bool Q3DataManager::confirmCancels() const
{
    return d->confCancs;
}

/*!  \internal

  Virtual function which returns a confirmation for an edit of mode \a
  m.  Derived classes can reimplement this function and provide their
  own confirmation dialog.  The default implementation uses a message
  box which prompts the user to confirm the edit action.  The dialog
  is centered over \a parent.

*/

QSql::Confirm Q3DataManager::confirmEdit(QWidget* parent, QSql::Op m)
{
    int ans = 2;
    if (m == QSql::Delete) {
#ifndef QT_NO_MESSAGEBOX
        ans = QMessageBox::information(parent,
                                        qApp->translate("QSql", "Delete"),
                                        qApp->translate("QSql", "Delete this record?"),
                                        qApp->translate("QSql", "Yes"),
                                        qApp->translate("QSql", "No"),
                                        QString(), 0, 1);
#else
        ans = QSql::No;
#endif // QT_NO_MESSAGEBOX
    } else if (m != QSql::None) {
        QString caption;
        if (m == QSql::Insert) {
            caption = qApp->translate("QSql", "Insert");
        } else { // QSql::Update
            caption = qApp->translate("QSql", "Update");
        }
#ifndef QT_NO_MESSAGEBOX
        ans = QMessageBox::information(parent, caption,
                                        qApp->translate("QSql", "Save edits?"),
                                        qApp->translate("QSql", "Yes"),
                                        qApp->translate("QSql", "No"),
                                        qApp->translate("QSql", "Cancel"),
                                        0, 2);
#else
        ans = QSql::No;
#endif // QT_NO_MESSAGEBOX
    }

    switch (ans) {
    case 0:
        return QSql::Yes;
    case 1:
        return QSql::No;
    default:
        return QSql::Cancel;
    }
}

/*!  \internal

  Virtual function which returns a confirmation for canceling an edit
  mode \a m.  Derived classes can reimplement this function and
  provide their own confirmation dialog.  The default implementation
  uses a message box which prompts the user to confirm the edit
  action. The dialog is centered over \a parent.


*/

QSql::Confirm Q3DataManager::confirmCancel(QWidget* parent, QSql::Op)
{
#ifndef QT_NO_MESSAGEBOX
    switch (QMessageBox::information(parent,
                                       qApp->translate("QSql", "Confirm"),
                                       qApp->translate("QSql", "Cancel your edits?"),
                                       qApp->translate("QSql", "Yes"),
                                       qApp->translate("QSql", "No"),
                                       QString(), 0, 1)) {
    case 0:
        return QSql::Yes;
    case 1:
        return QSql::No;
    default:
        return QSql::Cancel;
    }
#else
    return QSql::Yes;
#endif // QT_NO_MESSAGEBOX
}

#endif