I am trying to add a row to QTableView with a QAbstractTableModel and QItemDelegate where the widgets appear in the added row. From what I've read I need to call .edit(index) on each item of the added row to call createEditor where the widgets are created however I am getting edit: editing failed
QItemDelegate:
class Delegate(QItemDelegate):
def __init__(self):
QItemDelegate.__init__(self)
self.type_items = ["1", "2", "3"]
def createEditor(self, parent, option, index):
# COMBOBOX, LINEEDIT, TIMEDIT
if index.column() == 0:
comboBox = QComboBox(parent)
for text in self.type_items:
comboBox.addItem(text, (index.row(), index.column()))
return comboBox
elif index.column() == 1:
lineEdit = QLineEdit(parent)
return lineEdit
elif index.column() == 2:
timeEdit = QTimeEdit(parent)
return timeEdit
def setEditorData(self, editor, index):
value = index.model()._data[index.row()][index.column()]
if index.column() == 0:
editor.setCurrentIndex(self.type_items.index(value))
elif index.column() == 1:
editor.setText(str(value))
elif index.column() == 2:
editor.setTime(value)
QAbstractTableModel:
class TableModel(QAbstractTableModel):
def __init__(self, data):
super(TableModel, self).__init__()
self._data = data
def data(self, index, role):
pass
def rowCount(self, index=None):
return len(self._data)
def columnCount(self, index=None):
return len(self._data[0])
Main:
class MainWindow(QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
localWidget = QWidget()
self.table = QTableView(localWidget)
data = [["1", "Hi", QTime(2, 1)], ["2", "Hello", QTime(3, 0)]]
self.model = TableModel(data)
self.table.setModel(self.model)
self.table.setItemDelegate(Delegate())
self.add_row = QPushButton("Add Row", localWidget)
self.add_row.clicked.connect(self.addRow)
for row in range(self.model.rowCount()):
for column in range(self.model.columnCount()):
index = self.model.index(row, column)
self.table.openPersistentEditor(index)
layout_v = QVBoxLayout()
layout_v.addWidget(self.table)
layout_v.addWidget(self.add_row)
localWidget.setLayout(layout_v)
self.setCentralWidget(localWidget)
self.show()
def addRow(self):
new_row_data = ["3", "Howdy", QTime(9, 0)]
self.model.beginInsertRows(QModelIndex(), self.model.rowCount(), self.model.rowCount())
self.model._data.append(new_row_data)
self.model.endInsertRows()
for i in range(len(new_row_data)):
index = self.table.model().index(self.model.rowCount()-1, i)
self.table.edit(index)
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
How can I trigger the QItemDelegate's createEditor to create the widgets for the added row's items and setEditorData to populate them?
First of all, you could use
openPersistentEditor
as you already did in the__init__
.There are two reasons for the error in
self.table.edit()
:edit()
, theflags()
function must be overridden and provide theQt.ItemIsEditable
flag;edit()
multiple times on different indexes within the same function;Then, there are other important problems in your code:
data()
is not implemented;index.model()._data
is not good);setEditorData
is unnecessary, as long as the above aspects are respected: Qt automatically sets the data based on the data type and the editor class;setData()
should be implemented in order to correctly set the data on the model, otherwise the new data won't be accessible;Here is a revised version of your code: