qabstractitemmodel

I'm trying to debug my model (QAbstractItemModel) with ModelTest. And I can't understand one assertion. There are two slots in ModelTest that intercept signals generated by my model. ModelTest::rowsAboutToBeInserted ModelTest::rowsInserted Slot/function 1 looks like this void ModelTest::rowsAboutToBeInserted ( const QModelIndex &parent, int start, int end ) { Changing c; // ... c.last = model->data ( model->index ( start - 1, 0, parent ) ); c.next = model->data ( model->index ( start, 0, parent ) ); insert.push ( c ); } And slot 2 looks like this void ModelTest::rowsInserted ( const

I have tree model with theoretically infinite depth and some property "Group". In addition to standard view, I need to show this model (and keep it in sync) in such way that each group becomes a virtual parent for all items with the same property value. What is the best way to achieve this with Qt's model/view architecture? I had solved similar problem not a long time ago via inserting additional virtual "groups" on adding/removing items to/from the model, but this method proved not to be very flexible so I'm looking for better solution. Ideally, I see this implemented via QSortProxyFilter

I have QStringListModel QStringListModel* blocksModel = new QStringListModel(); And a class inherited from the QObject class Block : public QObject { Q_OBJECT public: Block(); Block(const Block& other); ~Block; //and other stuff here }; Q_DECLARE_METATYPE(Block*) When I set a data for the Qt::EditRole, everything works fine but when I'm trying to set data for the Qt::UserRole, it never returns true, and when I'm getting data I see invalid QVariant int count = blocksModel->rowCount(); blocksModel->insertRows(count, 1); QModelIndex index = blocksModel->index(count, 0); // it works QString name =

I have a custom data structure that I want to display in a PyQt application using a QTableView. I'm using a subclass of QAbstractTableModel to communicate with the data. The data structure itself is in a separate module and knows nothing about PyQt. Displaying and editing the data with the QTableView works, but now I'd like to sort the data and then update the model and view. After reading the Qt documentation for QAbstractTableModel and its ancestor QAbstractItemModel, my first approach was to try this: class MyModel(QtCore.QAbstractTableModel): __init__(self, data_structure): super().__init_

I need working examples (c++) of show own data model in QtreeView. Nathan Pitman There's a pretty good QTreeView/QAbstractItemModel example here . It's fairly straightforward once you get used to QT's ultra-generic model... just don't expect it to be as simple or obvious as Java's TreeModel. 来源： https://stackoverflow.com/questions/4354515/qabstractitemmodel-and-qtreeview