How to select row on cursor move? - python-3.x

Question

I want to imitate list walking with arrow keys, I mean to select row when cursor goes up or down with arrow keys, like it happens when I click right-mouse-button on cell in this code, but keyPressEvent does not fires when I use arrows keys.
import sys
from PySide6 import QtCore
from PySide6.QtGui import QKeyEvent
from PySide6.QtWidgets import QMainWindow, QApplication, QTableWidgetItem, QTableWidget, QVBoxLayout, QWidget
from loguru import logger
class TableWindow(QMainWindow):
def __init__(self, data, parent=None):
super(TableWindow, self).__init__(parent)
self.table_widget = QTableWidget()
self.table_widget.cellClicked.connect(self.clicked)
self.populate_cells(data)
layout = QVBoxLayout()
layout.addWidget(self.table_widget)
widget = QWidget()
widget.setLayout(layout)
self.setCentralWidget(widget)
def keyPressEvent(self, event) -> None:
logger.info(f"{event.key()=}")
def clicked(self, row, col):
logger.info(f"{row}, {col}")
self.table_widget.selectRow(row)
def populate_cells(self, data):
self.table_widget.setRowCount(len(data))
self.table_widget.setColumnCount(len(data[0]))
for row in range(len(data)):
for col in range(len(data[0])):
value = data[row][col]
self.table_widget.setItem(row, col, QTableWidgetItem(value))
if __name__ == "__main__":
data_sample = [
["customer1", "address1"],
["customer2", "address2"]
]
app = QApplication(sys.argv)
window = TableWindow(data_sample)
window.show()
sys.exit(app.exec())

Answer 1

I think the issue is that you are listening for keyPressEvents on the main window when you want to be listening for them on the QTableWidget.
What you can do is subclass QTableWidget and reimplement the keyPressEvent method.
For Example:
class TableWidget(QTableWidget):
def keyPressEvent(self, event):
logger.info(f"{event.key()=}")
super().keyPressEvent(event)
class TableWindow(QMainWindow):
def __init__(self, data, parent=None):
super(TableWindow, self).__init__(parent)
self.table_widget = TableWidget()
self.table_widget.cellClicked.connect(self.clicked)
self.populate_cells(data)
layout = QVBoxLayout()
layout.addWidget(self.table_widget)
widget = QWidget()
widget.setLayout(layout)
self.setCentralWidget(widget)
def clicked(self, row, col):
logger.info(f"{row}, {col}")
self.table_widget.selectRow(row)
def populate_cells(self, data):
self.table_widget.setRowCount(len(data))
self.table_widget.setColumnCount(len(data[0]))
for row in range(len(data)):
for col in range(len(data[0])):
value = data[row][col]
self.table_widget.setItem(row, col, QTableWidgetItem(value))
if __name__ == "__main__":
data_sample = [
["customer1", "address1"],
["customer2", "address2"]
]
app = QApplication(sys.argv)
window = TableWindow(data_sample)
window.show()
sys.exit(app.exec())