Centering a QIcon in a QTableWidgetItem in PyQt5

Question

I have a QTableWidget in which some of the QTableWidgetItem's contain a single QIcon (not a button, not clickable, just an image). Can anybody advise me on how to center the icon? I am providing below some sample code which correctly displays the icon, but fails to center it (setTextAlignment seems to work for the items that contain text but apparently not for icons).

status_item = QtGui.QTableWidgetItem()
status_icon = QtGui.QIcon()
status_icon.addPixmap(QtGui.QPixmap(icon_file), QtGui.QIcon.Normal, QtGui.QIcon.Off)
status_item.setIcon(status_icon)
self.ServiceTableWidget.setItem(row, 0, status_item)
self.ServiceTableWidget.item(row, 0).setTextAlignment(QtCore.Qt.AlignHCenter) #not working

I have also tried using the QIcon.paint() method, which did not work, although I may be implementing it incorrectly:

status_icon.paint(QtGui.QPainter(), QtCore.QRect(), QtCore.Qt.AlignCenter)

Thanks in advance!

@SvenKrüger yes, that gives the same result (code runs and does not crash, but the icon is not centered) — bavistr, Feb 28 '19 at 17:39
Icons are normally placed in the left of a cell. How wide is your cell in relation to the icon? Is it much wider? — Sven-Eric Krüger, Feb 28 '19 at 17:41
@A.E.Janett Do you want all the icons to be centered or only the icons of a certain row or column? In my answer all the icons will be centered — eyllanesc, Feb 28 '19 at 17:43
@eyllanesc I want all the icons to be centered. Thank you very much! I'll review your response and provide an update soon — bavistr, Feb 28 '19 at 17:48

eyllanesc · Accepted Answer · 2019-02-28T17:48:47.697

You can use a delegate:

from PyQt5 import QtCore, QtGui, QtWidgets

class IconDelegate(QtWidgets.QStyledItemDelegate):
    def initStyleOption(self, option, index):
        super(IconDelegate, self).initStyleOption(option, index)
        if option.features & QtWidgets.QStyleOptionViewItem.HasDecoration:
            s = option.decorationSize
            s.setWidth(option.rect.width())
            option.decorationSize = s

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.ServiceTableWidget = QtWidgets.QTableWidget(3, 3)

        delegate = IconDelegate(self.ServiceTableWidget)  # <--- 
        self.ServiceTableWidget.setItemDelegate(delegate) # <---

        icon_file = "lamp.png"
        status_item = QtWidgets.QTableWidgetItem()
        status_icon = QtGui.QIcon()
        status_icon.addPixmap(QtGui.QPixmap(icon_file), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        status_item.setIcon(status_icon)
        self.ServiceTableWidget.setItem(0, 0, status_item)

        self.setCentralWidget(self.ServiceTableWidget)

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication.instance()
    if app is None:
        app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

Centering a QIcon in a QTableWidgetItem in PyQt5

1 Answers1