QPainter won't draw lines on QTableWidget

[ACollins]

I have a table which I defined this way.

 def setupUi(self, Dialog):
        
        Dialog.setObjectName("Dialogs")
        x = 450
        y = 1394
        posX = 1005
        Dialog.resize(x, y)
        Dialog.setMinimumSize(QtCore.QSize(x, y))
        Dialog.setMaximumSize(QtCore.QSize(x, y))
        Dialog.setGeometry(QtCore.QRect(posX, 0, x, y))
        Dialog.setStyleSheet("background-color: rgb(172,216,219);") 

        self.tableWidget = QtWidgets.QTableWidget(Dialog)
        self.tableWidget.setGeometry(QtCore.QRect(0, 0, x-1, y-1))
        self.tableWidget.setObjectName("tableWidget")

Everything works fine with the table but then I try to put a line on the table, which later on will be dynamic, nothing shows up. I was able to use this code in a standalone app and it worked but when I try to draw on QTableWidget nothing shows up. Thanks.

        self.painter = QtGui.QPainter(Dialog)
        self.painter.begin(Dialog)
        self.painter.setRenderHint(QPainter.Antialiasing)
        self.painter.setPen(QtCore.Qt.red)
        self.painter.setBrush(QtCore.Qt.white)
        self.painter.drawLine(40, 1050, 60, 1100)

[SGaist]

Hi,

Where did you put that code ?
You can't arbitrarily paint on a widget. It has to happens in it's paintEvent method.

[ACollins]

Just below where i created the table and certainly not in paintEvent method. I see some examples online so will try those out. Thanks.