QListStringModel setData not set data

[asiaron]

Hey, I'm making an education project text editor
I list opened file in a dock (QListView). I need to handle clicks on rows in listview, so I store indexes of QSLM in a QMap modelListLinks. In first inserting row in QSLM everything is fine, but then setData just not works and title of files in dock is empty.
Indexes are correct, because when I click on rows they change active tab properly.
Function that creates rows

void MainWindow::on_actionNew_triggered()
{
    QTextEdit* textEdit = new QTextEdit(tabs);
    textEdits.insert(textEdit, "");
    tabs->addTab(textEdit, "Безымянный");

    modelList->insertRow(0);
    QModelIndex index = modelList->index(modelList->rowCount()-1);
    modelList->setData(index, "Безымянный", Qt::DisplayRole);

    modelListLinks.insert(index, textEdit);
    modelList->setData(index, fileInfo.fileName(), Qt::DisplayPropertyRole);
}
```
The part of constructor, which declares model

    tabs->addTab(textEdit, fileInfo.fileName());
    modelList->insertRow(0);
    QModelIndex index = modelList->index(modelList->rowCount()-1);
    modelList->setData(index, fileInfo.fileName(), Qt::DisplayPropertyRole);
    modelListLinks.insert(index, textEdit);

![0_1517245532900_Screenshot from 2018-01-29 19-48-47.png](https://ddgobkiprc33d.cloudfront.net/a5016df3-18f5-42fe-9199-48f4cd8b4eff.png)

[mrjj]

Hi and welcome to the forums.
is this a custom model ?
You might need to call
http://doc.qt.io/qt-5/qabstractitemmodel.html#beginInsertRows

Ah sorry its a QListStringModel ( non subclass, i assume ?)

if we look at this sample
http://www.bogotobogo.com/Qt/Qt5_QListView_QStringListModel_ModelView_MVC.php
Im wondering if (from your sample)
modelList->insertRow(0);
QModelIndex index = modelList->index(modelList->rowCount()-1);
Get the wrong index as
http://doc.qt.io/qt-5/qabstractitemmodel.html#insertRow
says it inserts before the given parent ( which is empty QModelIndex() )
but you take out index for last row.
When you click button, does it insert teh "empty" ones in bottom ? or top ?

[asiaron]

@mrjj said in QListStringModel setData not set data:

is this a custom model ?

it's not a subclass, pure QListStringModel

Here are declarations of used
QMap<QModelIndex, QWidget*> modelListLinks;
QStringListModel* modelList;

[mrjj]

@asiaron
Ok plain standard.
I update the answer. Im not sure you get the right index of the just inserted.

[asiaron]

Yes, I not properly read documentation and really mess with indexes, thank you for the answer
.