How to undo edit of qstandarditem in pyqt?

Using the identical question asked about QListWidgets as a guide, I am trying to make a QStandardItemModel in which I can undo the edit of an item. As can be seen in the SSCCE below, I'm pretty much copying the example exactly, but with some minor tweaking because currentItemChanged isn't available for QStandardItemModel.
Accordingly, how to create new items in qstandarditem class?
The item's children are not copied. When subclassing QStandardItem, you can reimplement this function to provide QStandardItemModel with a factory that it can use to create new items on demand. See also QStandardItemModel::setItemPrototype () and operator= ().
Furthermore, how to get the qstandarditem index in qt? QModelIndex QStandardItem:: index () const Returns the QModelIndex associated with this item. When you need to invoke item functionality in a QModelIndex -based API (e.g. QAbstractItemView), you can call this function to obtain an index that corresponds to the item's location in the model.
In fact, how are items set in qstandarditem in python?
By default, items are enabled, editable, selectable, checkable, and can be used both as the source of a drag and drop operation and as a drop target. Each item’s flags can be changed by calling setFlags (). Checkable items can be checked and unchecked with the setCheckState () function.
Likewise, how does qstandarditem remove row without deleting it?
QList < QStandardItem *> QStandardItem:: takeRow (int row) Removes row without deleting the row items, and returns a list of pointers to the removed items. For items in the row that have not been set, the corresponding pointers in the list will be nullptr .

8 Similar Question Found

How to create a clone of a qstandarditem?

[virtual] QStandardItem *QStandardItem:: clone () const Returns a copy of this item. The item's children are not copied. When subclassing QStandardItem, you can reimplement this function to provide QStandardItemModel with a factory that it can use to create new items on demand.

How to connect a qstandarditem in a python function?

This function should be able to check all the other items of the list. I'm trying to do this by the following code: model = QStandardItemModel (list) item = QStandardItem ("Select all") model.appendRow (item) item.setCheckable (True) model.itemChanged.connect (state_changed) def state_changed (item): print ("Hello")

How to set parent column in qstandarditem class?

See also QStandardItemModel::setItemPrototype () and operator= (). Returns the column where the item is located in its parent's child table, or -1 if the item has no parent. See also row () and parent ().

What can i do with the qstandarditem class?

The QStandardItem class provides an item for use with the QStandardItemModel class. Items usually contain text, icons, or checkboxes. Each item can have its own background brush which is set with the setBackground() function.

When to reimplement the type function in qstandarditem?

When subclassing QStandardItem to provide custom items, it is possible to define new types for them so that they can be distinguished from the base class. The type () function should be reimplemented to return a new type value equal to or greater than UserType.

How to define new user types in qstandarditem?

You can define new user types in QStandardItem subclasses to ensure that custom items are treated specially; for example, when items are sorted. See also type (). Constructs a copy of other.

How to create a hierarchy in qstandarditem class?

Each item can have a two-dimensional table of child items. This makes it possible to build hierarchies of items. The typical hierarchy is the tree, in which case the child table is a table with a single column (a list). The dimensions of the child table can be set with setRowCount () and setColumnCount ().

What is the function of qstandarditem in python?

When subclassing QStandardItem , you can reimplement this function to provide QStandardItemModel with a factory that it can use to create new items on demand. Returns the column where the item is located in its parent’s child table, or -1 if the item has no parent. Returns the number of child item columns that the item has.