class SrwrLookup: def __init__(self, iface, db, srwr_lu_dia): self.iface = iface self.db = db self.srwr_lu_dia = srwr_lu_dia self.connect_buttons() self.items_model = None self.data_model = None self.queries = { 0: """SELECT designation_code, (designation_code || ' : ' || designation_text) AS 'display' FROM tlkpSPEC_DES ORDER BY designation_code""", 1: """SELECT reinstatement_code, (reinstatement_code || ' : ' || description) AS 'display' FROM tlkpREINS_CAT ORDER BY reinstatement_code""", 2: """SELECT road_status_ref, (road_status_ref || ' : ' || Description) AS 'display' FROM tlkpROAD_STATUS ORDER BY road_status_ref""" } self.tables = { 0: "tlkpSPEC_DES", 1: "tlkpREINS_CAT", 2: "tlkpROAD_STATUS" } self.columns = { 0: "designation_code", 1: "reinstatement_code", 2: "road_status_ref" } self.amend_queries = { 0: """UPDATE tlkpSPEC_DES SET designation_text = '{0}' WHERE designation_code = {1} """, 1: """UPDATE tlkpREINS_CAT SET description = '{0}' WHERE reinstatement_code = {1} """, 2: """UPDATE tlkpROAD_STATUS SET Description = '{0}' WHERE road_status_ref = {1}""" } self.changes_made = False # Setup initial view self.srwr_lu_dia.ui.desRadioButton.setChecked(True) self.populate_list(0) def connect_buttons(self): """ events handler for buttons in the form :return: object """ self.srwr_lu_dia.ui.addButton.clicked.connect(self.add_lookup) self.srwr_lu_dia.ui.removeButton.clicked.connect(self.remove_lookup) self.srwr_lu_dia.ui.amendButton.clicked.connect(self.amend_lookup) self.srwr_lu_dia.ui.closeButton.clicked.connect(self.close_browser) self.srwr_lu_dia.ui.desRadioButton.pressed.connect( lambda: self.populate_list(0)) self.srwr_lu_dia.ui.reinsRadioButton.pressed.connect( lambda: self.populate_list(1)) self.srwr_lu_dia.ui.statRadioButton.pressed.connect( lambda: self.populate_list(2)) self.srwr_lu_dia.ui.itemsListView.pressed.connect( lambda: self.selection_handler()) def close_browser(self): # close the dialog window if self.changes_made: changes_made_msg_box = QMessageBox( QMessageBox.Information, " ", "SRWR lookup tables updated.\n\n" "Restart roadNet to populate menus with new values.", QMessageBox.Ok, None) changes_made_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) changes_made_msg_box.exec_() self.srwr_lu_dia.close() def populate_list(self, table_id): """ populate the list view on initialisation and when radio buttons are toggled, this view is just for show because QSqlQueryModel class does not handle editing but data need to be displayed as concatenated strings, this is not allowed in a QSqlTableModel class :param table_id: the id passed from the radio button :return: void """ self.srwr_lu_dia.ui.typeDescLineEdit.clear() self.items_model = QSqlQueryModel() self.items_model.setQuery(self.queries[table_id], self.db) while self.items_model.canFetchMore(): self.items_model.fetchMore() self.srwr_lu_dia.ui.typeNoSpinBox.setValue(0) self.srwr_lu_dia.ui.itemsListView.setModel(self.items_model) self.srwr_lu_dia.ui.itemsListView.setModelColumn(1) self.create_data_model(table_id) def create_data_model(self, table_id): """ create an object from the QSqlTableModel class used to data modifications to send to the database :param table_id: the id passed from the radio button :return: void """ self.data_model = QSqlTableModel(db=self.db) self.data_model.setTable(self.tables[table_id]) self.data_model.setEditStrategy(QSqlTableModel.OnManualSubmit) self.data_model.setSort(2, Qt.AscendingOrder) self.data_model.select() while self.data_model.canFetchMore(): self.data_model.fetchMore() def add_lookup(self): """ get the max value each table model and increment of 1 add a record to the database when the add button is pressed with the incremented value :return: void """ ui = self.srwr_lu_dia.ui if ui.desRadioButton.isChecked(): table_id = 0 table = self.tables[table_id] ref_col = self.columns[0] elif ui.reinsRadioButton.isChecked(): table_id = 1 table = self.tables[table_id] ref_col = self.columns[1] elif ui.statRadioButton.isChecked(): table_id = 2 table = self.tables[table_id] ref_col = self.columns[2] # format text and numbers add_desc = str(ui.typeDescLineEdit.text()).strip() add_desc.replace("'", "''") add_code = ui.typeNoSpinBox.value() if add_desc == "" or add_code is None: desc_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "You must enter the code AND description", QMessageBox.Ok, None) desc_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) desc_error_msg_box.exec_() return # avoid duplicate insertion on double click on 'Add' button sel_model = ui.itemsListView.selectionModel() if sel_model.selectedIndexes(): # extracts just the id from the string sel_items = sel_model.selectedIndexes()[0] item_data = str(sel_items.data()) p = re.compile("([0-9]{1,3})(?=\s:)") src = p.search(item_data) item_id = int(src.group(1)) if item_id == add_code: dups_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Cannot add duplicate values", QMessageBox.Ok, None) dups_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) dups_error_msg_box.exec_() return # Avoid duplicate insertion by checking database sql_find_duplicates = """SELECT {0} FROM {1} WHERE {0} IS '{2}'""".format( ref_col, table, add_code) if config.DEBUG_MODE: print( 'DEBUG_MODE: find_duplicates: {}'.format(sql_find_duplicates)) query = QSqlQuery(sql_find_duplicates, self.db) if query.first(): # False unless value already found in table dup_values_msg_box = QMessageBox(QMessageBox.Warning, " ", "Cannot add duplicate values", QMessageBox.Ok, None) dup_values_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) dup_values_msg_box.exec_() return # create the record to insert data_model_idx = self.data_model.createIndex( self.data_model.rowCount() - 1, 0) insert_record = self.data_model.record(self.items_model.rowCount()) insert_record.setValue(1, add_code) insert_record.setValue(2, add_desc) insert_record.setValue(3, str("")) insert_record.setValue(4, str("")) self.data_model.insertRecord(self.items_model.rowCount(), insert_record) if self.data_model.submitAll(): # clear the line input and selects the newly created value on the list ui.typeDescLineEdit.clear() ui.typeNoSpinBox.setValue(1) self.populate_list(table_id) index = ui.itemsListView.model().createIndex( self.items_model.rowCount() - 1, 1) ui.itemsListView.setCurrentIndex(index) self.changes_made = True else: db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(self.data_model.lastError().text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() return def selection_handler(self, table_id=None): """ Populate the typeNoSpinBox and typeDescLineEdit with data from the selected row in the list. The data are extracted from the string value itself, without reference to the original model. :return void: """ # print all selected list items to the text box sel_model = self.srwr_lu_dia.ui.itemsListView.selectionModel() sel_items = sel_model.selectedIndexes()[0] item_data = str(sel_items.data()) # split text from the code number p = re.compile("\:(.*)") src = p.search(item_data) item_text = str(src.group(1)[1:]) p = re.compile("([0-9]{1,3})(?=\s:)") src = p.search(item_data) item_id = int(src.group(1)) self.srwr_lu_dia.ui.typeNoSpinBox.setValue(item_id) self.srwr_lu_dia.ui.typeDescLineEdit.setText(item_text) def remove_lookup(self): """ this function deletes selected items from the list view and db, only if the lookups are not used, in this case it prevents the removal displaying the list of the streets that use the lookup :return: void """ ui = self.srwr_lu_dia.ui if ui.desRadioButton.isChecked(): table_id = 0 table = self.tables[table_id] ref_col = self.columns[0] sql_usrns = "SELECT usrn FROM tblSPEC_DES WHERE " \ "(designation_code = {0} AND currency_flag=0);" \ .format(str(ui.typeNoSpinBox.value())) elif ui.reinsRadioButton.isChecked(): table_id = 1 table = self.tables[table_id] ref_col = self.columns[1] sql_usrns = "SELECT usrn FROM tblREINS_CAT WHERE " \ "(reinstatement_code = {0} AND currency_flag=0);" \ .format(str(ui.typeNoSpinBox.value())) elif ui.statRadioButton.isChecked(): table_id = 2 table = self.tables[table_id] ref_col = self.columns[2] sql_usrns = "SELECT usrn FROM tblMaint WHERE " \ "(road_status_ref = {0} AND currency_flag=0);" \ .format(str(ui.typeNoSpinBox.value())) data_model = self.data_model item_text = ui.typeDescLineEdit.text() item_ref = ui.typeNoSpinBox.value() selection_model = ui.itemsListView.selectionModel() try: item_to_remove = selection_model.selectedIndexes()[0] except IndexError: # Throws if nothing selected return # prevent deleting the default lookup just for designation and road status if table_id == 0 or table_id == 2: if item_text == "-none-" or item_ref == 0: # not_remove_message = self.srwr_lu_dia.ui.removeButton remove_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "This item cannot be removed", QMessageBox.Ok, None) remove_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) remove_error_msg_box.exec_() return # Check for USRNs that use this item query = QSqlQuery(sql_usrns, self.db) usrns = [] while query.next(): usrns.append(str(query.value(0))) if len(usrns) > 0: # Create a message message = ("This item cannot be deleted because is used by the " "following streets: \n") usrns_string = ', '.join(usrns[:20]) if len(usrns) > 20: usrns_string += ' and more...' long_message = message + usrns_string # Display warning message in box, then exit item_not_deletable_msg_box = QMessageBox(QMessageBox.Warning, " ", long_message, QMessageBox.Ok, None) item_not_deletable_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) item_not_deletable_msg_box.exec_() return # Remove selected row and clear the line edit sql_remove_item = """DELETE FROM {} WHERE {} IS {};""".format(table, ref_col, item_ref) if config.DEBUG_MODE: print('DEBUG_MODE: remove_item: {}'.format(sql_remove_item)) query = QSqlQuery(sql_remove_item, self.db) # Query is excuted here ui.typeDescLineEdit.clear() # Check the delete was successful if query.numRowsAffected > 0: # Repopulate table and select previous item in list self.populate_list(table_id) if item_to_remove.row() == 0: index = ui.itemsListView.model().createIndex(0, 1) else: index = ui.itemsListView.model().createIndex( item_to_remove.row() - 1, 1) ui.itemsListView.setCurrentIndex(index) self.selection_handler(table_id) self.changes_made = True else: db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(data_model.lastError.text(), QMessageBox.Ok, None)) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() return def amend_lookup(self): """ change the value of existing lookup items, this time are used db queries :return: void """ table_id = None if self.srwr_lu_dia.ui.typeDescLineEdit.text() == "": return item_id = self.srwr_lu_dia.ui.typeNoSpinBox.value() selection_model = self.srwr_lu_dia.ui.itemsListView.selectionModel() selection_indexes = selection_model.selectedIndexes() # if nothing is selects exit the function if not selection_indexes: return selection_index = selection_indexes[0] if selection_index.data() == "0 : -none-": # if the selected value is -none- fire an alert not_edit_msg_box = QMessageBox(QMessageBox.Warning, " ", "This item cannot be edited", QMessageBox.Ok, None) not_edit_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) not_edit_msg_box.exec_() return # changes the values directly onto the db des_radio_btn = self.srwr_lu_dia.ui.desRadioButton reins_radio_btn = self.srwr_lu_dia.ui.reinsRadioButton stat_radio_btn = self.srwr_lu_dia.ui.statRadioButton amend_query = QSqlQuery(self.db) if des_radio_btn.isChecked(): table_id = 0 format_query = self.amend_queries[0].format( self.srwr_lu_dia.ui.typeDescLineEdit.text(), item_id) if not amend_query.exec_(format_query): db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(amend_query.lastError().text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() if reins_radio_btn.isChecked(): table_id = 1 format_query = self.amend_queries[1].format( self.srwr_lu_dia.ui.typeDescLineEdit.text(), item_id) if not amend_query.exec_(format_query): db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(amend_query.lastError().text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() if stat_radio_btn.isChecked(): table_id = 2 format_query = self.amend_queries[2].format( self.srwr_lu_dia.ui.typeDescLineEdit.text(), item_id) if not amend_query.exec_(format_query): db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(amend_query.lastError().text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() # closes the query and repopulate the list self.changes_made = True amend_query.clear() self.populate_list(table_id)
class LsgLookUp: def __init__(self, iface, db, lsg_lu_dia): self.iface = iface self.db = db self.lsg_lu_dia = lsg_lu_dia self.tables = {0: "tlkpLOCALITY", 1: "tlkpTOWN", 2: "tlkpCOUNTY"} self.columns = {0: "loc_ref", 1: "town_ref", 2: "county_ref"} self.items_model = None self.set_data() self.model_navigation() self.item_value = None self.changes_made = False def model_navigation(self): """ events handler for buttons in the form :return: object """ self.lsg_lu_dia.ui.addButton.clicked.connect(self.add_lookup) self.lsg_lu_dia.ui.removeButton.clicked.connect(self.remove_lookup) self.lsg_lu_dia.ui.amendButton.clicked.connect(self.amend_lookup) self.lsg_lu_dia.ui.closeButton.clicked.connect(self.close_browser) self.lsg_lu_dia.ui.locRadioButton.pressed.connect( lambda: self.populate_list(0)) self.lsg_lu_dia.ui.townRadioButton.pressed.connect( lambda: self.populate_list(1)) self.lsg_lu_dia.ui.countyRadioButton.pressed.connect( lambda: self.populate_list(2)) self.lsg_lu_dia.ui.itemsListView.pressed.connect( lambda: self.selection_handler()) def close_browser(self): # close the dialog window if self.changes_made: changes_made_msg_box = QMessageBox( QMessageBox.Information, " ", "LSG lookup tables updated.\n\n" "Restart roadNet to populate menus with new values.", QMessageBox.Ok, None) changes_made_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) changes_made_msg_box.exec_() self.lsg_lu_dia.close() def set_data(self): # initialise the state of the form when opened self.lsg_lu_dia.ui.locRadioButton.setChecked(True) self.populate_list(0) def populate_list(self, table_id): """ populate the list view on initialisation and when radio buttons are toggled :param table_id: the id passed from the radio button :return: void """ self.lsg_lu_dia.ui.addLookupLineEdit.clear() self.items_model = QSqlTableModel(db=self.db) self.items_model.setTable(self.tables[table_id]) self.items_model.setEditStrategy(QSqlTableModel.OnManualSubmit) self.items_model.setSort(2, Qt.AscendingOrder) self.items_model.select() while self.items_model.canFetchMore(): self.items_model.fetchMore() self.lsg_lu_dia.ui.itemsListView.setModel(self.items_model) self.lsg_lu_dia.ui.itemsListView.setModelColumn(2) def add_lookup(self): """ get the max value each table model and increment of 1 add a record to the database when the add button is pressed with the incremented value :return: void """ ui = self.lsg_lu_dia.ui if ui.locRadioButton.isChecked(): table = self.tables[0] ref_col = self.columns[0] elif ui.townRadioButton.isChecked(): table = self.tables[1] ref_col = self.columns[1] elif ui.countyRadioButton.isChecked(): table = self.tables[2] ref_col = self.columns[2] new_item = ui.addLookupLineEdit.text().strip() if new_item == "": return # Avoid duplicate insertion on double click on 'Add' button selection_model = ui.itemsListView.selectionModel() if selection_model.selectedIndexes(): current_item = selection_model.selectedIndexes()[0] current_item_text = str(current_item.data()) if current_item_text == new_item: dup_values_msg_box = QMessageBox( QMessageBox.Warning, " ", "Cannot add duplicate values", QMessageBox.Ok, None) dup_values_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) dup_values_msg_box.exec_() return # Avoid duplicate insertion by checking database sql_find_duplicates = """SELECT name FROM {} WHERE name IS '{}'""".format(table, new_item) if config.DEBUG_MODE: print( 'DEBUG_MODE: find_duplicates: {}'.format(sql_find_duplicates)) query = QSqlQuery(sql_find_duplicates, self.db) if query.first(): # False unless value already found in table dup_values_msg_box = QMessageBox(QMessageBox.Warning, " ", "Cannot add duplicate values", QMessageBox.Ok, None) dup_values_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) dup_values_msg_box.exec_() return # Get ID for new item sql_find_max_ref = """SELECT MAX({}) AS 'max_ref' FROM {};""".format(ref_col, table) if config.DEBUG_MODE: print('DEBUG_MODE: find_max_ref: {}'.format(sql_find_max_ref)) query = QSqlQuery(sql_find_max_ref, self.db) query.first() max_ref = query.record().value('max_ref') if isinstance(max_ref, QPyNullVariant): max_ref = 0 # Create the record to insert row_count = self.items_model.rowCount() new_record = self.items_model.record(row_count) new_record.setValue(1, max_ref + 1) new_record.setValue(2, new_item) new_record.setValue(3, str("")) self.items_model.insertRecord(row_count, new_record) if self.items_model.submitAll(): # True if successfully updated # clear the line input and selects the newly created value ui.addLookupLineEdit.clear() index = ui.itemsListView.model().createIndex(row_count, 2) ui.itemsListView.setCurrentIndex(index) self.changes_made = True else: db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {} ".format(self.items_model.lastError().text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() return def remove_lookup(self): """ this function deletes selected items from the list view and db, only if the lookups are not used, in this case it prevents the removal displaying the list of the streets that use the lookup :return: void """ # Setup ui = self.lsg_lu_dia.ui if ui.locRadioButton.isChecked(): table = self.tables[0] ref_col = self.columns[0] elif ui.townRadioButton.isChecked(): table = self.tables[1] ref_col = self.columns[1] elif ui.countyRadioButton.isChecked(): table = self.tables[2] ref_col = self.columns[2] # Get selected item item_text = ui.addLookupLineEdit.text() table_model = self.items_model selection_model = ui.itemsListView.selectionModel() selection_index = selection_model.selectedIndexes() if not selection_index: return # if the selected value is <none> fire an alert # (<none> cannot be either removed or modified) selection_index = selection_index[0] if item_text == "" and selection_index.row() == 0: not_remove_msg_box = QMessageBox(QMessageBox.Warning, " ", "This item cannot be removed", QMessageBox.Ok, None) not_remove_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) not_remove_msg_box.exec_() return # Get list of USRNs attached to record; get item_ref first item_name = selection_index.data() sql_get_item_ref = """SELECT {0} AS 'item_ref' FROM {1} WHERE name IS '{2}';""".format( ref_col, table, item_name) if config.DEBUG_MODE: print('DEBUG_MODE: sql_get_item_ref: {}'.format(sql_get_item_ref)) query = QSqlQuery(sql_get_item_ref, self.db) query.first() item_ref = query.record().value('item_ref') # Reference of item # then get USRN list. sql_get_usrns = """SELECT usrn FROM tblSTREET WHERE {} = {} AND currency_flag = 0""".format(ref_col, item_ref) query = QSqlQuery(sql_get_usrns, self.db) usrns = [] # collects all street USRN where the item is used while query.next(): usrns.append(str(query.value(0))) # Cannot delete a record with attached USRNs if len(usrns) > 0: # Create a message message = ("This item cannot be deleted because is used by the " "following streets: \n") usrns_string = ', '.join(usrns[:20]) if len(usrns) > 20: usrns_string += ' and more...' long_message = message + usrns_string # Display warning message in box, then exit item_not_deletable_msg_box = QMessageBox(QMessageBox.Warning, " ", long_message, QMessageBox.Ok, None) item_not_deletable_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) item_not_deletable_msg_box.exec_() return # No attached records, so delete the row table_model.beginRemoveRows(selection_index.parent(), selection_index.row(), selection_index.row()) table_model.removeRow(selection_index.row()) table_model.endRemoveRows() ui.addLookupLineEdit.clear() # Check the delete was successful if table_model.submitAll(): # selects the item above the removed one index = ui.itemsListView.model().createIndex( selection_index.row() - 1, 2) ui.itemsListView.setCurrentIndex(index) self.selection_handler() self.changes_made = True else: db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(table_model.lastError.text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() def amend_lookup(self): """ change the value of existing lookup items :return: void """ if self.lsg_lu_dia.ui.addLookupLineEdit.text() == "": return item_text = self.lsg_lu_dia.ui.addLookupLineEdit.text() table_model = self.items_model selection_model = self.lsg_lu_dia.ui.itemsListView.selectionModel() selection_index = selection_model.selectedIndexes() # if nothing is selects exit the function if not selection_index: return selection_index = selection_index[0] if item_text == "<none>": # if the selected value is <none> fire an alert not_edit_msg_box = QMessageBox(QMessageBox.Warning, " ", "This item cannot be edited", QMessageBox.Ok, None) not_edit_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) not_edit_msg_box.exec_() return rows = table_model.rowCount() i = 1 while rows > i: table_index = self.lsg_lu_dia.ui.itemsListView.model().createIndex( i, 2) i += 1 if item_text == str(table_index.data()): dup_item_name_msg_box = QMessageBox( QMessageBox.Warning, " ", "An item with this name already exists", QMessageBox.Ok, None) dup_item_name_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) dup_item_name_msg_box.exec_() return if table_model.setData(selection_index, item_text, Qt.EditRole): if table_model.submitAll(): # change the value and selects that same value from the list self.lsg_lu_dia.ui.addLookupLineEdit.clear() index = self.lsg_lu_dia.ui.itemsListView.model().createIndex( selection_index.row(), 2) self.lsg_lu_dia.ui.itemsListView.setCurrentIndex(index) self.changes_made = True return else: db_error_msg_box = QMessageBox( QMessageBox.Warning, " ", "Error: {}".format(table_model.lastError.text()), QMessageBox.Ok, None) db_error_msg_box.setWindowFlags(Qt.CustomizeWindowHint | Qt.WindowTitleHint) db_error_msg_box.exec_() return def selection_handler(self): # print all selected list items to the text box sel_model = self.lsg_lu_dia.ui.itemsListView.selectionModel() sel_items = sel_model.selectedIndexes()[0] item_text = str(sel_items.data()) self.item_value = sel_items.row() # if the selected value is <none> set read only if item_text == "<none>" or self.item_value == 0: self.lsg_lu_dia.ui.addLookupLineEdit.setText("") self.lsg_lu_dia.ui.amendButton.setEnabled(False) else: self.lsg_lu_dia.ui.amendButton.setEnabled(True) self.lsg_lu_dia.ui.addLookupLineEdit.setText(item_text)