I am trying to center the texts of an item of QTableWidget for which I occupy the following:
self.tabla.insertRow(self.tabla.rowCount())
self.tabla.setItem(self.tabla.rowCount()-1,0,QTableWidgetItem(_id).setTextAlignment(QtCore.Qt.AlignHCenter))
but it does not center the text, on the contrary, when including the line .setTextAlignment(QtCore.Qt.AlignHCenter) the text is not even shown.
Nothing is shown because the argument item of QTableWidget.setItem you spend just that, nothing. When doing:
QTableWidgetItem(_id).setTextAlignment(QtCore.Qt.AlignHCenter)
what you do is the following:
QTableWidgetItem with QTableWidgetItem(_id) . setTextAlignment of the newly created object, which correctly maps the alignment and return. This method returns None and it is that return that is passed to QTableWidget.setItem , not an instance of QTableWidgetItem . Therefore, what you do is basically:
self.tabla.setItem(self.tabla.rowCount() - 1, 0, None)
The solution is simple, instantiate the object and assign it to a variable to keep a reference to it, then use that variable to call its method setTextAlignment and finally pass it to QTableWidget.setItem :
self.tabla.insertRow(self.tabla.rowCount())
item = QTableWidgetItem(_id)
item.setTextAlignment(QtCore.Qt.AlignHCenter)
self.tabla.setItem(self.tabla.rowCount() - 1, 0, item)
A reproducible example:
import sys
from PyQt5.QtWidgets import QDialog, QApplication, QTableWidget, QTableWidgetItem, QVBoxLayout
from PyQt5 import QtCore
class Example(QDialog):
def __init__(self):
super().__init__()
self.layout = QVBoxLayout()
self.tableWidget = QTableWidget()
self.layout.addWidget(self.tableWidget)
self.setLayout(self.layout)
self.tableWidget.setRowCount(4)
self.tableWidget.setColumnCount(2)
for i in range(4):
for j in range(2):
item = QTableWidgetItem("Item {}-{}".format(i, j))
item.setTextAlignment(QtCore.Qt.AlignHCenter)
self.tableWidget.setItem(i, j, item)
if __name__ == '__main__':
app = QApplication(sys.argv)
w = Example()
w.show()
sys.exit(app.exec_())