Is there a proper way to hatch QLabel

As stated in the title, I do want to know if there is a proper way to hatch the QLabel which in my case is has the Geometry of QRect as you can see in my code.

I checked the documentation but I didn’t understand how I can hatch the QLabel.

Here is an image of how it might the QLabel will look after hatching (different options):

Note: that I don’t intend to load a QPixmap, and I’m looking for more neat approach.

Answer

You can override QLabel‘s paintEvent and use QBrush with predefined BrushStyle pattern or define your pattern as tiny pixmap and use as a QBrush.

If you need pattern on top of text (as foreground) call super().paintEvent(event) before drawing it, if you need it below text (as background) call super().paintEvent(event) after.

from PyQt5 import QtWidgets, QtGui, QtCore

class LabelStandardPattern(QtWidgets.QLabel):

    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        painter.save()
        painter.setPen(QtCore.Qt.NoPen)
        painter.setBrush(QtGui.QBrush(QtCore.Qt.Dense6Pattern))
        painter.drawRect(self.rect())
        painter.restore()
        super().paintEvent(event)


class LabelUserPattern(QtWidgets.QLabel):

    def __init__(self, text="", parent = None):
        super().__init__(text, parent)
        image = QtGui.QImage(5,5, QtGui.QImage.Format_ARGB32)
        image.fill(QtCore.Qt.transparent)
        painter = QtGui.QPainter(image)
        painter.drawLine(0,0,2,2)
        self._brush = QtGui.QBrush(image)
        self._image = image

    def paintEvent(self, event):
        
        painter = QtGui.QPainter(self)
        painter.save()
        painter.setPen(QtCore.Qt.NoPen)
        painter.setBrush(self._brush)
        painter.setRenderHint(QtGui.QPainter.Antialiasing, False)
        painter.drawRect(self.rect())
        painter.restore()
        super().paintEvent(event)

if __name__ == "__main__":
    app = QtWidgets.QApplication([])

    palette = app.palette()
    palette.setColor(QtGui.QPalette.Foreground, QtGui.QColor(QtCore.Qt.blue))

    label1 = LabelStandardPattern("Standard Pattern")
    label1.setPalette(palette)
    label1.setFont(QtGui.QFont("Arial", 20))
    
    label2 = LabelUserPattern("User Pattern")
    label2.setPalette(palette)
    label2.setFont(QtGui.QFont("Arial", 20))
    
    widget = QtWidgets.QWidget()
    layout = QtWidgets.QVBoxLayout()
    layout.addWidget(label1)
    layout.addWidget(label2)
    widget.setLayout(layout)
    widget.show()

    app.exec()