qt4 QStringList with model/view

[incapacitant]

QStringList Destinataires::getDestList()
{
  QStringList rows;
  int rowCount = model->rowCount();
  int i;
  QString s;
 
  QItemSelectionModel *sel = qDestin->selectionModel();
  for( i = 0; i < rowCount; i++ ) 
    if ( sel->isRowSelected( i, qDestin->rootIndex() ) )
      s = model->data( model->index( i, 0 ) ); <- compile error
      rows.push_back( s );
  return rows;
}

QStringList Destinataires::getDestList()
{
  QStringList rows;
  int rowCount = model->rowCount();
  int i;
  QString s;
  
  QItemSelectionModel *sel = qDestin->selectionModel();
  for( i = 0; i < rowCount; i++ ) 
    if ( sel->isRowSelected( i, qDestin->rootIndex() ) )
      s = model->data( model->index( i, 0 ) ); <- compile error
      rows.push_back( s );
  return rows;
}

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96 C:\Qt\test\sms\destin.cpp no match for 'operator=' in 's = *(((Destinataires*)this)->Destinataires::model->QAbstractItemModel::_vptr$QObject + 68u)(((const QModelIndex&)((const QModelIndex*)(&*(((Destinataires*)this)->Destinataires::model->QAbstractItemModel::_vptr$QObject + 48u)(i, 0, ((const QModelIndex&)((const QModelIndex*)(&QModelIndex()))))))), 0)'

96 C:\Qt\test\sms\destin.cpp no match for 'operator=' in 's = *(((Destinataires*)this)->Destinataires::model->QAbstractItemModel::_vptr$QObject + 68u)(((const QModelIndex&)((const QModelIndex*)(&*(((Destinataires*)this)->Destinataires::model->QAbstractItemModel::_vptr$QObject + 48u)(i, 0, ((const QModelIndex&)((const QModelIndex*)(&QModelIndex()))))))), 0)'

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What should I do to retrieve the QString s from the model ?

[jpn]

QStringList Destinataires::getDestList()
{
	QStringList rows;
	QModelIndexList selected = selectionModel()->selectedIndexes();
	foreach (QModelIndex idx, selected)
	{
		// you only want strings in 1st column? the list of selection
		// indexes contain indexes for possible rest of colums also..
		if (idx.row() == 0)
		{
			rows << idx.data().toString();
		}
	}
	return rows;
}

QStringList Destinataires::getDestList()
{
	QStringList rows;
	QModelIndexList selected = selectionModel()->selectedIndexes();
	foreach (QModelIndex idx, selected)
	{
		// you only want strings in 1st column? the list of selection
		// indexes contain indexes for possible rest of colums also..
		if (idx.row() == 0)
		{
			rows << idx.data().toString();
		}
	}
	return rows;
}

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[incapacitant]

with

QModelIndexList selected = selectionModel()->selectedIndexes();

QModelIndexList selected = selectionModel()->selectedIndexes();

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I get compile error :
89 C:\Qt\test\sms\destin.cpp `((Destinataires*)this)->Destinataires::selectionModel' cannot be used as a function

Sorry I am completly a beginner in QT4 and model/views.

[jpn]

Right, I missed the qDestin ptr.. How about this:

QModelIndexList selected = qDestin->selectionModel()->selectedIndexes();

QModelIndexList selected = qDestin->selectionModel()->selectedIndexes();

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[incapacitant]

Yes what you say works perfectly. QT4 is hard to understand for me.

[incapacitant]

As I want all rows your code has become :

QStringList Destinataires::getDestList()
{
  QStringList rows; 
  QModelIndexList selected = qDestin->selectionModel()->selectedIndexes();     
  foreach (QModelIndex idx, selected)
    rows << idx.data().toString();
 
  return rows;
}

QStringList Destinataires::getDestList()
{
  QStringList rows; 
  QModelIndexList selected = qDestin->selectionModel()->selectedIndexes();     
  foreach (QModelIndex idx, selected)
    rows << idx.data().toString();

  return rows;
}

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But there you declare "QModelIndexList". What does it mean ?
Related Non-Memberstypedef QModelIndexList
Synonym for QList<QModelIndex>.
Completly lost.

[jpn]

As docs say, it's just a synonym for a QList containing QModelIndexes.

All view's have a selection model which keeps track of selected items.
There might be multiple selected "items", so the selection cannot just be a single "item".
So the view's selection model needs to return a list of selected indexes.

QModelIndexList QItemSelectionModel::selectedIndexes () const

Returns a list of all selected model item indexes. The list contains no duplicates, and is not sorted.

[incapacitant]

There is a pre-defined type for all QList ?
Here we have QList<QStrings>.
Would it be still the same QModelIndexList ?
with QList<Int>, or another type ?

[jpn]

There is a pre-defined type for all QList ?
Here we have QList<QStrings>.
Would it be still the same QModelIndexList ?
with QList<Int>, or another type ?

Actually, QStringList and QList<QString> are different. QStringList inherits QList<QString> and adds some functionality..

Because QList is a template class, you can have a list of basically anything, as long as it is an assignable data type.

There are a few type definitions: QVariantList, QObjectList, QModelIndexList..
You can take them as a more convenient way of writing the type or something..

There is an essential reason for these type definitions, and I think it has something to do with Qt's meta-object system, only registered meta types can be used in signal and slot connections..
But that's a whole different world to discuss

[incapacitant]

Well now the next question is how do I retrieve the ith item number of a QStringList ?

(i am lost with this)

[jpn]

Take a look at the documentation and see what methods QList offers..

You can use for example method at(int i) or operator [].

QString row = rows.at(i);

QString row = rows.at(i);

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QString row = rows[i];

QString row = rows[i];

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