I have a QTreeView which displays a result from SQLite via QSqlTableModel (PyQt5 version: 5.13.0).
I want to change some values via a detail-dialog which populates the data via modelTable.record().
Therefore I set the edit strategy to OnManualSubmit and store the values later on with submitAll().
Problem: I write the changed values to Db with record.setValue().
But: if I change a value twice, it's current row number may change.
Reproduce:
The entry will be applied to the last row. -> OK.
But the old values remain in the first row! Now I have the first and last row identically and the old values from previously first row are lost!
Sqlite Error UNIQUE constraint failed: <id> Unable to fetch row occurs also.
Expectation: when pressing "Save" the 2nd time, the values from the dialog are displayed in the last row and the old values from row 1 are correct.
(You'd get this if you push the "refresh" btn or close the dlg between the 2 modification operations.)
Full working code example:
import sys
import re
from PyQt5 import QtWidgets, QtGui, QtCore, QtSql
TRACE = True
MY_TABLE = "person"
db = QtSql.QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName(":memory:")
modelQuery = QtSql.QSqlQueryModel()
modelTable = QtSql.QSqlRelationalTableModel()
g_hits_count = 0
g_total_count = 0
g_selected_count = 0
def trace(message):
if TRACE:
print(message)
def _human_key(key):
parts = re.split(r'(\d*\.\d+|\d+)', key)
return tuple((e.swapcase() if i % 2 == 0 else float(e))
for i, e in enumerate(parts))
class dlgDetail(QtWidgets.QDialog):
def __init__(self, parent, cur_row, row_id):
QtWidgets.QDialog.__init__(self, parent)
self.setModal(False)
self.setWindowModality(QtCore.Qt.NonModal)
self.parent = self.parent()
trace(f"dlgDetail was called with cur_row: {cur_row}")
self.cur_row = cur_row
self.row_id = row_id
self.setupUi(self)
# connect signals
self.accepted.connect(self.dlgDetail_accepted)
self.rejected.connect(self.dlgDetail_rejected)
self.pbNew.clicked.connect(self.on_pbNew_clicked)
self.pbSave.clicked.connect(self.on_pbSave_clicked)
self.pbSave.setDefault(True)
self.pbDel.clicked.connect(self.on_pbDel_clicked)
self.pbCancel.clicked.connect(self.on_pbCancel_clicked)
if cur_row > -1: # existing record
# load selected record
# get current selection (could be filtered)
sourceIdx = self.parent.treeView.model().mapToSource(self.parent.treeView.currentIndex())
self.cur_row = sourceIdx.row()
trace(f"got my own cur_row -> {self.cur_row}")
record_display = modelTable.record(self.cur_row)
persId = record_display.value("persId")
lastName = record_display.value("lastName")
firstName = record_display.value("firstName")
country = record_display.value("name")
# display record
self.efId.setText(persId)
self.efLastName.setText(lastName)
self.efFirstName.setText(firstName)
self.populate_comboBox(self.cmbCountry, country)
else: # new record
# get next free row id
modelQuery.setQuery("SELECT IFNULL(MAX(id),0)+1 FROM person")
self.row_id = modelQuery.data(modelQuery.index(0, 0))
self.efId.setText("new" + str(self.row_id))
self.efLastName.setText("new" + str(self.row_id))
self.efFirstName.setText("new" + str(self.row_id))
self.populate_comboBox(self.cmbCountry, 0)
self.show()
def get_geometry(self):
return self.geometry().x(), self.geometry().y(), self.geometry().width(), self.geometry().height()
def center(self, offset):
frameGm = self.frameGeometry()
screen = QtWidgets.QApplication.desktop().screenNumber(QtWidgets.QApplication.desktop().cursor().pos())
centerPoint = QtWidgets.QApplication.desktop().screenGeometry(screen).center()
frameGm.moveCenter(centerPoint)
self.move(frameGm.topLeft()+QtCore.QPoint(frameGm.topLeft().x(), frameGm.topLeft().y()+offset))
def clear_inputs(self):
self.efId.setText("new")
self.efLastName.setText("new")
self.efFirstName.setText("new")
self.cmbCountry.setCurrentIndex(0)
def setupUi(self, parent):
vBox = QtWidgets.QVBoxLayout(self)
form = QtWidgets.QFormLayout()
lblId = QtWidgets.QLabel(self)
lblId.setText("ID:")
form.setWidget(0, QtWidgets.QFormLayout.LabelRole, lblId)
self.efId = QtWidgets.QLineEdit(self)
form.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.efId)
lblLastName = QtWidgets.QLabel(self)
lblLastName.setText("Last Name:")
form.setWidget(1, QtWidgets.QFormLayout.LabelRole, lblLastName)
self.efLastName = QtWidgets.QLineEdit(self)
form.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.efLastName)
lblFirstName = QtWidgets.QLabel(self)
lblFirstName.setText("First Name:")
form.setWidget(2, QtWidgets.QFormLayout.LabelRole, lblFirstName)
self.efFirstName = QtWidgets.QLineEdit(self)
form.setWidget(2, QtWidgets.QFormLayout.FieldRole, self.efFirstName)
lblCountry = QtWidgets.QLabel(self)
lblCountry.setText("Country:")
form.setWidget(3, QtWidgets.QFormLayout.LabelRole, lblCountry)
self.cmbCountry = QtWidgets.QComboBox(self)
form.setWidget(3, QtWidgets.QFormLayout.FieldRole, self.cmbCountry)
vBox.addLayout(form)
# command buttons
hBox = QtWidgets.QHBoxLayout()
spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
hBox.addItem(spacerItem)
self.pbNew = QtWidgets.QPushButton(self)
self.pbNew.setText("New")
hBox.addWidget(self.pbNew)
self.pbSave = QtWidgets.QPushButton(self)
self.pbSave.setText("Save")
hBox.addWidget(self.pbSave)
self.pbDel = QtWidgets.QPushButton(self)
self.pbDel.setText("Del")
hBox.addWidget(self.pbDel)
self.pbCancel = QtWidgets.QPushButton(self)
self.pbCancel.setText("Cancel")
hBox.addWidget(self.pbCancel)
spacerItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
hBox.addItem(spacerItem1)
vBox.addLayout(hBox)
def populate_comboBox(self, comboBox, country):
model = QtSql.QSqlTableModel()
model.setTable("country")
model.select()
comboBox.setModel(model)
comboBox.setModelColumn(model.fieldIndex("name"))
# select the person's set country
index = comboBox.findText(str(country), QtCore.Qt.MatchFixedString)
if index >= 0:
comboBox.setCurrentIndex(index)
def dlgDetail_accepted(self):
pass
def dlgDetail_rejected(self):
pass
@QtCore.pyqtSlot()
def on_pbCancel_clicked(self):
self.reject()
@QtCore.pyqtSlot()
def on_pbSave_clicked(self):
trace(f"saving for row_id: {self.row_id}")
country_id = self.cmbCountry.currentIndex()
self.cur_row, self.row_id = self.parent.update_record(self.cur_row, self.row_id, self.efId.text(), self.efLastName.text(), self.efFirstName.text(), country_id)
@QtCore.pyqtSlot()
def on_pbNew_clicked(self):
self.accept()
self.parent.new_record()
@QtCore.pyqtSlot()
def on_pbDel_clicked(self):
self.parent.del_record()
self.accept()
class FilterHeader(QtWidgets.QHeaderView):
filterActivated = QtCore.pyqtSignal()
def __init__(self, parent):
super().__init__(QtCore.Qt.Horizontal, parent)
self._editors = []
self._padding = 4
self.setStretchLastSection(True)
self.setDefaultAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignVCenter)
self.setSortIndicatorShown(False)
self.sectionResized.connect(self.adjustPositions)
parent.horizontalScrollBar().valueChanged.connect(self.adjustPositions)
def setFilterBoxes(self, count):
while self._editors:
editor = self._editors.pop()
editor.deleteLater()
for index in range(count):
editor = QtWidgets.QLineEdit(self.parent())
editor.setPlaceholderText('Filter')
editor.setClearButtonEnabled(True)
editor.textChanged.connect(self.textChanged)
self._editors.append(editor)
self.adjustPositions()
def textChanged(self):
self.filterActivated.emit()
def sizeHint(self):
size = super().sizeHint()
if self._editors:
height = self._editors[0].sizeHint().height()
size.setHeight(size.height() + height + self._padding)
return size
def updateGeometries(self):
if self._editors:
height = self._editors[0].sizeHint().height()
self.setViewportMargins(0, 0, 0, height + self._padding)
else:
self.setViewportMargins(0, 0, 0, 0)
super().updateGeometries()
self.adjustPositions()
def adjustPositions(self):
for index, editor in enumerate(self._editors):
height = editor.sizeHint().height()
editor.move(
self.sectionPosition(index) - self.offset() + 2,
height + (self._padding // 2))
editor.resize(self.sectionSize(index), height)
def filterText(self, index):
if 0 <= index < len(self._editors):
return self._editors[index].text()
return ''
def setFilterText(self, index, text):
if 0 <= index < len(self._editors):
self._editors[index].setText(text)
def clearFilters(self):
for editor in self._editors:
editor.clear()
class HumanProxyModel(QtCore.QSortFilterProxyModel):
def lessThan(self, source_left, source_right):
data_left = source_left.data()
data_right = source_right.data()
if type(data_left) == type(data_right) == str:
return _human_key(data_left) < _human_key(data_right)
return super(HumanProxyModel, self).lessThan(source_left, source_right)
@property
def filters(self):
if not hasattr(self, "_filters"):
self._filters = []
return self._filters
@filters.setter
def filters(self, filters):
self._filters = filters
self.invalidateFilter()
global g_hits_count
g_hits_count = self.rowCount()
def filterAcceptsRow(self, sourceRow, sourceParent):
for i, text in self.filters:
if 0 <= i < self.sourceModel().columnCount():
ix = self.sourceModel().index(sourceRow, i, sourceParent)
data = ix.data()
if text not in data:
return False
return True
class winMain(QtWidgets.QMainWindow):
cur_row = -1
row_id = -1
def __init__(self, parent=None):
super().__init__(parent)
self.setWindowTitle("SqlTableModel Test")
self.setupUi()
self.setGeometry(300,200,700,500)
self.treeView.selectionModel().selectionChanged.connect(self.item_selection_changed_slot)
self.treeView.doubleClicked.connect(self.on_treeView_doubleClicked)
self.center()
self.show()
def closeEvent(self, event):
self.deleteLater()
def new_record(self):
self.cur_row = -1
self.row_id = -1
dlgDetail(self, self.cur_row, self.row_id)
self.updateStatus()
def update_record(self, cur_row, row_id, persId, lastName, firstName, country_id):
trace("update_record() called. row: {cur_row}, id: {row_id}")
record = modelTable.record()
row = modelTable.rowCount()
if cur_row > -1: # existing entry
trace(f"storing existing -> {lastName} (id: {row_id}) on row {cur_row}")
row = cur_row
record.setValue("id", row_id)
else:
trace(f"storing new -> {lastName} (id: {row_id}) on row {cur_row}")
row = modelTable.rowCount()
modelTable.insertRow(row)
record.setValue("persId", persId)
record.setValue("lastName", lastName)
record.setValue("firstName", firstName)
record.setValue("name", country_id)
# Update Model
modelTable.setRecord(row, record)
# Update Database
if modelTable.submitAll():
trace("success on storing data.")
else:
print("error on storing data: ", modelTable.lastError().text())
if cur_row == -1:
# get used row_id
record_display = modelTable.record(row)
row_id = record_display.value("persId")
trace(f" got new_row id from database: {row_id} after save.")
self.updateStatus()
# Remember current row data
self.cur_row = row
self.row_id = row_id
print (f"returning row: {row}, row_id: {row_id}")
return row, row_id
def edit_record(self, sourceIdx):
if not sourceIdx:
sourceIdx = self.treeView.currentIndex()
# check if multiple selected rows exist
if len(self.treeView.selectionModel().selectedRows()) > 1:
reply = QtWidgets.QMessageBox.question(self, f"Editing multiple records",
f"Do you want to edit *all* the selected records?\rYes = Edit all records, No = Edit only current record",
QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No | QtWidgets.QMessageBox.Cancel,
QtWidgets.QMessageBox.Yes)
if reply == QtWidgets.QMessageBox.Yes:
# load all selected rows
index_list = []
for model_index in self.treeView.selectionModel().selectedRows():
index = QtCore.QPersistentModelIndex(model_index)
index_list.append(index)
offset = 0
for index in index_list:
cur_row = index.row()
ix = self.treeView.model().index(index.row(), 0) # column which contains the id
row_id = ix.data()
dlgDetail(self, cur_row, row_id)
offset += 20
return True
# only single selection
trace("single selection")
self.cur_row = sourceIdx.row()
ix = self.treeView.model().index(sourceIdx.row(), 0) # column which contains the id
self.row_id = ix.data()
dlgDetail(self, self.cur_row, self.row_id)
self.updateStatus()
@QtCore.pyqtSlot(QtCore.QModelIndex)
def on_treeView_doubleClicked(self, index):
self.edit_record(index)
def handleFilterActivated(self):
header = self.treeView.header()
filters = []
for i in range(header.count()):
text = header.filterText(i)
if text:
filters.append((i, text))
proxy = self.treeView.model()
proxy.filters = filters
self.updateStatus()
QtCore.pyqtSlot()
def item_selection_changed_slot(self):
selected = self.treeView.selectionModel()
indexes = selected.selectedIndexes()
global g_selected_count
g_selected_count = len(selected.selectedRows())
sourceIdx = self.treeView.currentIndex()
trace(f"sourceIdx.row() -> {sourceIdx.row()}")
ix = self.treeView.model().index(sourceIdx.row(), 0) # column which contains the id
self.cur_row = sourceIdx.row()
self.row_id = ix.data()
trace(f"setting cur_row to -> {self.cur_row}")
trace(f"setting row_id to -> {self.row_id}")
record = modelTable.record(self.cur_row)
persId = record.value("persId")
lastName = record.value("lastName")
firstName = record.value("firstName")
country = record.value("name")
trace(f"self.cur_row: {self.cur_row}")
trace(f"self.row_id : {self.row_id}")
trace(f"persId: {persId}")
trace(f"lastName: {lastName}")
self.updateStatus()
def refresh(self):
cur_row = -1
row_id = -1
self.clear_all_filters()
modelTable.select() # fetch the data of the table into the model
self.treeView.sortByColumn(2, QtCore.Qt.DescendingOrder)
self.updateStatus()
self.statusBar.showMessage(f"data reloaded.")
def updateStatus(self):
global g_hits_count, g_total_count, g_selected_count
sStatusText = f"Selected: {str(g_selected_count)} / Hits: {str(g_hits_count)} / Total: {str(g_total_count)} | Current row: {self.cur_row}, row id: {self.row_id}"
self.statusBar.showMessage(sStatusText)
def keyReleaseEvent(self, eventQKeyEvent):
key = eventQKeyEvent.key()
modifiers = QtWidgets.QApplication.keyboardModifiers()
if modifiers == QtCore.Qt.ShiftModifier and key == QtCore.Qt.Key_Escape:
self.clear_all_filters()
def keyPressEvent(self, event):
key = event.key()
modifiers = QtWidgets.QApplication.keyboardModifiers()
if modifiers != QtCore.Qt.ShiftModifier:
focus_obj = self.focusWidget()
if key == QtCore.Qt.Key_Return:
if type(focus_obj) == QtWidgets.QTreeView:
self.edit_record(self.treeView.currentIndex())
elif key == QtCore.Qt.Key_Escape:
if type(focus_obj) == QtWidgets.QLineEdit:
focus_obj.clear()
def clear_all_filters(self):
# clear all inputs of type QLineEdit
lineEdits = self.findChildren(QtWidgets.QLineEdit)
for lineEdit in lineEdits:
lineEdit.clear()
def center(self):
frameGm = self.frameGeometry()
screen = QtWidgets.QApplication.desktop().screenNumber(QtWidgets.QApplication.desktop().cursor().pos())
centerPoint = QtWidgets.QApplication.desktop().screenGeometry(screen).center()
frameGm.moveCenter(centerPoint)
self.move(frameGm.topLeft())
def setupUi(self):
self.centralwidget = QtWidgets.QWidget(self)
hBox = QtWidgets.QHBoxLayout(self.centralwidget)
self.treeView = QtWidgets.QTreeView(self.centralwidget)
self.treeView.setRootIsDecorated(False)
self.treeView.setSortingEnabled(True)
self.treeView.setAlternatingRowColors(True)
self.treeView.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.treeView.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
self.treeView.header().setStretchLastSection(True)
hBox.addWidget(self.treeView)
self.setCentralWidget(self.centralwidget)
header = FilterHeader(self.treeView)
self.treeView.setHeader(header)
self.treeView.sortByColumn(2, QtCore.Qt.DescendingOrder)
# StatusBar
self.statusBar = QtWidgets.QStatusBar()
self.setStatusBar(self.statusBar)
# ToolBar
exitAct = QtWidgets.QAction("Exit", self, shortcut="Ctrl+Q", triggered=QtWidgets.qApp.quit)
newRecordAct = QtWidgets.QAction("New", self, shortcut="Ctrl+N", triggered=self.new_record)
editRecordAct = QtWidgets.QAction("Edit", self, shortcut="Return", triggered=self.edit_record)
refreshAct = QtWidgets.QAction("Refresh", self, shortcut="F5", triggered=self.refresh)
self.toolbar = self.addToolBar('Exit')
self.toolbar.addAction(exitAct)
self.toolbar.addSeparator()
self.toolbar.addAction(newRecordAct)
self.toolbar.addAction(editRecordAct)
self.toolbar.addSeparator()
self.toolbar.addAction(refreshAct)
modelTable.setTable(MY_TABLE)
modelTable.setHeaderData(0, QtCore.Qt.Horizontal, "row id")
modelTable.setHeaderData(1, QtCore.Qt.Horizontal, "ID")
modelTable.setHeaderData(2, QtCore.Qt.Horizontal, "Last Name")
modelTable.setHeaderData(3, QtCore.Qt.Horizontal, "First Name")
modelTable.setHeaderData(4, QtCore.Qt.Horizontal, "Country")
modelTable.setRelation(4, QtSql.QSqlRelation("country", "id", "name"))
modelTable.setEditStrategy(QtSql.QSqlTableModel.OnManualSubmit)
self.treeView.setModel(modelTable) # display data of the SQLTableModel into the QTreeView
if not TRACE:
self.treeView.setColumnHidden(0, True)
# enable human sorting
proxy = HumanProxyModel(self)
proxy.setSourceModel(modelTable)
self.treeView.setModel(proxy)
# enable filtering
header.setFilterBoxes(modelTable.columnCount())
header.filterActivated.connect(self.handleFilterActivated)
# update counters
global g_total_count, g_hits_count
g_total_count = modelTable.rowCount()
g_hits_count = g_total_count
self.updateStatus()
def create_sample_data():
modelQuery.setQuery("""CREATE TABLE IF NOT EXISTS country (
id INTEGER PRIMARY KEY UNIQUE NOT NULL,
name TEXT
)""")
modelQuery.setQuery("""CREATE TABLE IF NOT EXISTS person (
id INTEGER PRIMARY KEY UNIQUE NOT NULL,
persId TEXT,
lastName TEXT,
firstName TEXT,
country_id INTEGER NOT NULL DEFAULT 3,
FOREIGN KEY (country_id) REFERENCES country(id)
)""")
# create some sample data for our model
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (0, 'None')")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (1, 'Angola')")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (2, 'Serbia')")
modelQuery.setQuery("INSERT INTO country (id, name) VALUES (3, 'Georgia')")
modelQuery.setQuery("INSERT INTO person (id, persId, lastName, firstName, country_id) VALUES (1, '1001', 'a', 'Robert', 1)")
modelQuery.setQuery("INSERT INTO person (id, persId, lastName, firstName, country_id) VALUES (2, '1002', 'b', 'Brad', 2)")
modelQuery.setQuery("INSERT INTO person (id, persId, lastName, firstName, country_id) VALUES (3, '1003', 'c', 'Angelina', 3)")
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
create_sample_data()
window = winMain()
sys.exit(app.exec_())
Do not use the visual row since it can change when the row is reordered, instead you should look for some persistent element, a possible solution is to use a QPersintenModelIndex.
In the following code I implement that logic:
class dlgDetail(QtWidgets.QDialog):
def __init__(self, parent, index):
super(dlgDetail, self).__init__(parent)
self.setModal(False)
self.setWindowModality(QtCore.Qt.NonModal)
self.index = index
self.parent = self.parent()
trace(f"dlgDetail was called with cur_row: {index.row()}")
self.setupUi(self)
# connect signals
self.accepted.connect(self.dlgDetail_accepted)
self.rejected.connect(self.dlgDetail_rejected)
self.pbNew.clicked.connect(self.on_pbNew_clicked)
self.pbSave.clicked.connect(self.on_pbSave_clicked)
self.pbSave.setDefault(True)
self.pbDel.clicked.connect(self.on_pbDel_clicked)
self.pbCancel.clicked.connect(self.on_pbCancel_clicked)
if self.index.isValid():
record_display = modelTable.record(self.index.row())
persId = record_display.value("persId")
lastName = record_display.value("lastName")
firstName = record_display.value("firstName")
country = record_display.value("name")
self.efId.setText(persId)
self.efLastName.setText(lastName)
self.efFirstName.setText(firstName)
self.populate_comboBox(self.cmbCountry, country)
else:
modelQuery.setQuery("SELECT IFNULL(MAX(id),0)+1 FROM person")
self.row_id = modelQuery.data(modelQuery.index(0, 0))
self.efId.setText("new" + str(self.row_id))
self.efLastName.setText("new" + str(self.row_id))
self.efFirstName.setText("new" + str(self.row_id))
self.populate_comboBox(self.cmbCountry, 0)
self.show()
# ...
@QtCore.pyqtSlot()
def on_pbSave_clicked(self):
self.parent.update_record(
self.index,
self.efId.text(),
self.efLastName.text(),
self.efFirstName.text(),
self.cmbCountry.currentIndex()
)
# ...
class winMain(QtWidgets.QMainWindow):
# ...
def new_record(self):
dlgDetail(self, QtCore.QPersistentModelIndex())
self.updateStatus()
def update_record(self, index, persId, lastName, firstName, country_id):
if index.isValid():
row = index.row()
record = modelTable.record(row)
else:
row = modelTable.rowCount()
modelTable.insertRow(row)
record = modelTable.record()
record.setValue("persId", persId)
record.setValue("lastName", lastName)
record.setValue("firstName", firstName)
record.setValue("name", country_id)
modelTable.setRecord(row, record)
# Update Database
if modelTable.submitAll():
trace("success on storing data.")
else:
print("error on storing data: ", modelTable.lastError().text())
if not index.isValid():
record_display = modelTable.record(0)
row_id = record_display.value("persId")
trace(f" got new_row id from database: {row_id} after save.")
self.updateStatus()
def edit_record(self, sourceIdx):
if len(self.treeView.selectionModel().selectedRows()) > 1:
reply = QtWidgets.QMessageBox.question(
self,
f"Editing multiple records",
f"Do you want to edit *all* the selected records?\rYes = Edit all records, No = Edit only current recaord",
QtWidgets.QMessageBox.Yes
| QtWidgets.QMessageBox.No
| QtWidgets.QMessageBox.Cancel,
QtWidgets.QMessageBox.Yes,
)
if reply == QtWidgets.QMessageBox.Yes:
for proxy_index in self.treeView.selectionModel().selectedRows():
proxy_model = proxy_index.model()
index = proxy_model.mapToSource(proxy_index)
p_index = QtCore.QPersistentModelIndex(index)
dlgDetail(self, p_index)
return True
if not sourceIdx:
sourceIdx = self.treeView.currentIndex()
if not sourceIdx.isValid():
trace("not selection")
return False
# only single selection
trace("single selection")
proxy_model = sourceIdx.model()
index = proxy_model.mapToSource(sourceIdx)
dlgDetail(self, index)
self.updateStatus()
The full solution is here